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Last change on this file since e1e108 was aed262, checked in by Frederik Heber <frederik.heber@…>, 8 years ago
Upgraded boost.m4 from serial 22 to 26.
Property mode set to `100644`
File size: 56.2 KB

Rev	Line
[79de12]	1	# boost.m4: Locate Boost headers and libraries for autoconf-based projects.
[3b35e7]	2	# Copyright (C) 2007-2011, 2014 Benoit Sigoure <tsuna@lrde.epita.fr>
[79de12]	3	#
	4	# This program is free software: you can redistribute it and/or modify
	5	# it under the terms of the GNU General Public License as published by
	6	# the Free Software Foundation, either version 3 of the License, or
	7	# (at your option) any later version.
	8	#
	9	# Additional permission under section 7 of the GNU General Public
	10	# License, version 3 ("GPLv3"):
	11	#
	12	# If you convey this file as part of a work that contains a
	13	# configuration script generated by Autoconf, you may do so under
	14	# terms of your choice.
	15	#
	16	# This program is distributed in the hope that it will be useful,
	17	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	# GNU General Public License for more details.
	20	#
	21	# You should have received a copy of the GNU General Public License
	22	# along with this program. If not, see <http://www.gnu.org/licenses/>.
	23
	24	m4_define([_BOOST_SERIAL], [m4_translit([
[aed262]	25	# serial 26
[79de12]	26	], [#
	27	], [])])
	28
	29	# Original sources can be found at http://github.com/tsuna/boost.m4
	30	# You can fetch the latest version of the script by doing:
	31	# wget http://github.com/tsuna/boost.m4/raw/master/build-aux/boost.m4
	32
	33	# ------ #
	34	# README #
	35	# ------ #
	36
	37	# This file provides several macros to use the various Boost libraries.
	38	# The first macro is BOOST_REQUIRE. It will simply check if it's possible to
	39	# find the Boost headers of a given (optional) minimum version and it will
	40	# define BOOST_CPPFLAGS accordingly. It will add an option --with-boost to
	41	# your configure so that users can specify non standard locations.
	42	# If the user's environment contains BOOST_ROOT and --with-boost was not
	43	# specified, --with-boost=$BOOST_ROOT is implicitly used.
	44	# For more README and documentation, go to http://github.com/tsuna/boost.m4
	45	# Note: THESE MACROS ASSUME THAT YOU USE LIBTOOL. If you don't, don't worry,
	46	# simply read the README, it will show you what to do step by step.
	47
	48	m4_pattern_forbid([^_?(BOOST\|Boost)_])
	49
	50
	51	# _BOOST_SED_CPP(SED-PROGRAM, PROGRAM,
	52	# [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
	53	# --------------------------------------------------------
	54	# Same as AC_EGREP_CPP, but leave the result in conftest.i.
	55	#
	56	# SED-PROGRAM is not overquoted, as in AC_EGREP_CPP. It is expanded
	57	# in double-quotes, so escape your double quotes.
	58	#
	59	# It could be useful to turn this into a macro which extracts the
	60	# value of any macro.
	61	m4_define([_BOOST_SED_CPP],
[3b35e7]	62	[AC_LANG_PUSH([C++])dnl
	63	AC_LANG_PREPROC_REQUIRE()dnl
[79de12]	64	AC_REQUIRE([AC_PROG_SED])dnl
	65	AC_LANG_CONFTEST([AC_LANG_SOURCE([[$2]])])
	66	AS_IF([dnl eval is necessary to expand ac_cpp.
	67	dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell.
	68	dnl Beware of Windows end-of-lines, for instance if we are running
	69	dnl some Windows programs under Wine. In that case, boost/version.hpp
	70	dnl is certainly using "\r\n", but the regular Unix shell will only
	71	dnl strip `\n' with backquotes, not the `\r'. This results in
	72	dnl boost_cv_lib_version='1_37\r' for instance, which breaks
	73	dnl everything else.
	74	dnl Cannot use 'dnl' after [$4] because a trailing dnl may break AC_CACHE_CHECK
[aed262]	75	dnl
	76	dnl Beware that GCC 5, when expanding macros, may embed # line directives
	77	dnl a within single line:
	78	dnl
	79	dnl # 1 "conftest.cc"
	80	dnl # 1 "<built-in>"
	81	dnl # 1 "<command-line>"
	82	dnl # 1 "conftest.cc"
	83	dnl # 1 "/opt/local/include/boost/version.hpp" 1 3
	84	dnl # 2 "conftest.cc" 2
	85	dnl boost-lib-version =
	86	dnl # 2 "conftest.cc" 3
	87	dnl "1_56"
	88	dnl
	89	dnl So get rid of the # and empty lines, and glue the remaining ones together.
[79de12]	90	(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD \|
[aed262]	91	grep -v '#' \|
	92	grep -v '^[[[:space:]]]*$' \|
[79de12]	93	tr -d '\r' \|
[aed262]	94	tr -s '\n' ' ' \|
[79de12]	95	$SED -n -e "$1" >conftest.i 2>&1],
	96	[$3],
	97	[$4])
	98	rm -rf conftest*
[3b35e7]	99	AC_LANG_POP([C++])dnl
	100	])# _BOOST_SED_CPP
[79de12]	101
	102
	103
	104	# BOOST_REQUIRE([VERSION], [ACTION-IF-NOT-FOUND])
	105	# -----------------------------------------------
	106	# Look for Boost. If version is given, it must either be a literal of the form
	107	# "X.Y.Z" where X, Y and Z are integers (the ".Z" part being optional) or a
	108	# variable "$var".
	109	# Defines the value BOOST_CPPFLAGS. This macro only checks for headers with
	110	# the required version, it does not check for any of the Boost libraries.
	111	# On # success, defines HAVE_BOOST. On failure, calls the optional
	112	# ACTION-IF-NOT-FOUND action if one was supplied.
	113	# Otherwise aborts with an error message.
[aed262]	114	AC_DEFUN_ONCE([BOOST_REQUIRE],
[79de12]	115	[AC_REQUIRE([AC_PROG_CXX])dnl
	116	AC_REQUIRE([AC_PROG_GREP])dnl
	117	echo "$as_me: this is boost.m4[]_BOOST_SERIAL" >&AS_MESSAGE_LOG_FD
	118	boost_save_IFS=$IFS
	119	boost_version_req=$1
	120	IFS=.
	121	set x $boost_version_req 0 0 0
	122	IFS=$boost_save_IFS
	123	shift
	124	boost_version_req=`expr "$[1]" '' 100000 + "$[2]" '' 100 + "$[3]"`
	125	boost_version_req_string=$[1].$[2].$[3]
	126	AC_ARG_WITH([boost],
	127	[AS_HELP_STRING([--with-boost=DIR],
	128	[prefix of Boost $1 @<:@guess@:>@])])dnl
	129	AC_ARG_VAR([BOOST_ROOT],[Location of Boost installation])dnl
	130	# If BOOST_ROOT is set and the user has not provided a value to
	131	# --with-boost, then treat BOOST_ROOT as if it the user supplied it.
	132	if test x"$BOOST_ROOT" != x; then
	133	if test x"$with_boost" = x; then
	134	AC_MSG_NOTICE([Detected BOOST_ROOT; continuing with --with-boost=$BOOST_ROOT])
	135	with_boost=$BOOST_ROOT
	136	else
	137	AC_MSG_NOTICE([Detected BOOST_ROOT=$BOOST_ROOT, but overridden by --with-boost=$with_boost])
	138	fi
	139	fi
	140	AC_SUBST([DISTCHECK_CONFIGURE_FLAGS],
	141	["$DISTCHECK_CONFIGURE_FLAGS '--with-boost=$with_boost'"])dnl
	142	boost_save_CPPFLAGS=$CPPFLAGS
	143	AC_CACHE_CHECK([for Boost headers version >= $boost_version_req_string],
	144	[boost_cv_inc_path],
	145	[boost_cv_inc_path=no
	146	AC_LANG_PUSH([C++])dnl
	147	m4_pattern_allow([^BOOST_VERSION$])dnl
	148	AC_LANG_CONFTEST([AC_LANG_PROGRAM([[#include <boost/version.hpp>
	149	#if !defined BOOST_VERSION
	150	# error BOOST_VERSION is not defined
	151	#elif BOOST_VERSION < $boost_version_req
	152	# error Boost headers version < $boost_version_req
	153	#endif
	154	]])])
	155	# If the user provided a value to --with-boost, use it and only it.
	156	case $with_boost in #(
[3b35e7]	157	''\|yes) set x '' /opt/local/include /usr/local/include /opt/include \
	158	/usr/include C:/Boost/include;; #(
[79de12]	159	*) set x "$with_boost/include" "$with_boost";;
	160	esac
	161	shift
	162	for boost_dir
	163	do
	164	# Without --layout=system, Boost (or at least some versions) installs
	165	# itself in <prefix>/include/boost-<version>. This inner loop helps to
	166	# find headers in such directories.
	167	#
	168	# Any ${boost_dir}/boost-x_xx directories are searched in reverse version
	169	# order followed by ${boost_dir}. The final '.' is a sentinel for
	170	# searching $boost_dir" itself. Entries are whitespace separated.
	171	#
	172	# I didn't indent this loop on purpose (to avoid over-indented code)
	173	boost_layout_system_search_list=`cd "$boost_dir" 2>/dev/null \
	174	&& ls -1 \| "${GREP}" '^boost-' \| sort -rn -t- -k2 \
	175	&& echo .`
	176	for boost_inc in $boost_layout_system_search_list
	177	do
	178	if test x"$boost_inc" != x.; then
	179	boost_inc="$boost_dir/$boost_inc"
	180	else
	181	boost_inc="$boost_dir" # Uses sentinel in boost_layout_system_search_list
	182	fi
	183	if test x"$boost_inc" != x; then
	184	# We are going to check whether the version of Boost installed
	185	# in $boost_inc is usable by running a compilation that
	186	# #includes it. But if we pass a -I/some/path in which Boost
	187	# is not installed, the compiler will just skip this -I and
	188	# use other locations (either from CPPFLAGS, or from its list
	189	# of system include directories). As a result we would use
	190	# header installed on the machine instead of the /some/path
	191	# specified by the user. So in that precise case (trying
	192	# $boost_inc), make sure the version.hpp exists.
	193	#
	194	# Use test -e as there can be symlinks.
	195	test -e "$boost_inc/boost/version.hpp" \|\| continue
	196	CPPFLAGS="$CPPFLAGS -I$boost_inc"
	197	fi
	198	AC_COMPILE_IFELSE([], [boost_cv_inc_path=yes], [boost_cv_version=no])
	199	if test x"$boost_cv_inc_path" = xyes; then
	200	if test x"$boost_inc" != x; then
	201	boost_cv_inc_path=$boost_inc
	202	fi
	203	break 2
	204	fi
	205	done
	206	done
	207	AC_LANG_POP([C++])dnl
	208	])
	209	case $boost_cv_inc_path in #(
	210	no)
	211	boost_errmsg="cannot find Boost headers version >= $boost_version_req_string"
	212	m4_if([$2], [], [AC_MSG_ERROR([$boost_errmsg])],
	213	[AC_MSG_NOTICE([$boost_errmsg])])
	214	$2
	215	;;#(
	216	yes)
	217	BOOST_CPPFLAGS=
	218	;;#(
	219	*)
	220	AC_SUBST([BOOST_CPPFLAGS], ["-I$boost_cv_inc_path"])dnl
	221	;;
	222	esac
	223	if test x"$boost_cv_inc_path" != xno; then
	224	AC_DEFINE([HAVE_BOOST], [1],
	225	[Defined if the requested minimum BOOST version is satisfied])
	226	AC_CACHE_CHECK([for Boost's header version],
	227	[boost_cv_lib_version],
	228	[m4_pattern_allow([^BOOST_LIB_VERSION$])dnl
[aed262]	229	_BOOST_SED_CPP([[/^boost-lib-version = /{s///;s/[\" ]//g;p;q;}]],
[79de12]	230	[#include <boost/version.hpp>
	231	boost-lib-version = BOOST_LIB_VERSION],
	232	[boost_cv_lib_version=`cat conftest.i`])])
	233	# e.g. "134" for 1_34_1 or "135" for 1_35
	234	boost_major_version=`echo "$boost_cv_lib_version" \| sed 's/_//;s/_.*//'`
	235	case $boost_major_version in #(
	236	'' \| [[!0-9]])
[aed262]	237	AC_MSG_ERROR([invalid value: boost_major_version='$boost_major_version'])
[79de12]	238	;;
	239	esac
	240	fi
	241	CPPFLAGS=$boost_save_CPPFLAGS
	242	])# BOOST_REQUIRE
	243
[3b35e7]	244
[79de12]	245	# BOOST_STATIC()
	246	# --------------
	247	# Add the "--enable-static-boost" configure argument. If this argument is given
	248	# on the command line, static versions of the libraries will be looked up.
	249	AC_DEFUN([BOOST_STATIC],
	250	[AC_ARG_ENABLE([static-boost],
[3b35e7]	251	[AS_HELP_STRING([--enable-static-boost],
[79de12]	252	[Prefer the static boost libraries over the shared ones [no]])],
	253	[enable_static_boost=yes],
	254	[enable_static_boost=no])])# BOOST_STATIC
	255
[3b35e7]	256
[79de12]	257	# BOOST_FIND_HEADER([HEADER-NAME], [ACTION-IF-NOT-FOUND], [ACTION-IF-FOUND])
	258	# --------------------------------------------------------------------------
	259	# Wrapper around AC_CHECK_HEADER for Boost headers. Useful to check for
	260	# some parts of the Boost library which are only made of headers and don't
	261	# require linking (such as Boost.Foreach).
	262	#
	263	# Default ACTION-IF-NOT-FOUND: Fail with a fatal error unless Boost couldn't be
	264	# found in the first place, in which case by default a notice is issued to the
	265	# user. Presumably if we haven't died already it's because it's OK to not have
	266	# Boost, which is why only a notice is issued instead of a hard error.
	267	#
	268	# Default ACTION-IF-FOUND: define the preprocessor symbol HAVE_<HEADER-NAME> in
	269	# case of success # (where HEADER-NAME is written LIKE_THIS, e.g.,
	270	# HAVE_BOOST_FOREACH_HPP).
	271	AC_DEFUN([BOOST_FIND_HEADER],
	272	[AC_REQUIRE([BOOST_REQUIRE])dnl
	273	if test x"$boost_cv_inc_path" = xno; then
	274	m4_default([$2], [AC_MSG_NOTICE([Boost not available, not searching for $1])])
	275	else
	276	AC_LANG_PUSH([C++])dnl
	277	boost_save_CPPFLAGS=$CPPFLAGS
	278	CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
	279	AC_CHECK_HEADER([$1],
	280	[m4_default([$3], [AC_DEFINE(AS_TR_CPP([HAVE_$1]), [1],
	281	[Define to 1 if you have <$1>])])],
	282	[m4_default([$2], [AC_MSG_ERROR([cannot find $1])])])
	283	CPPFLAGS=$boost_save_CPPFLAGS
	284	AC_LANG_POP([C++])dnl
	285	fi
	286	])# BOOST_FIND_HEADER
	287
	288
[3b35e7]	289	# BOOST_FIND_LIBS([COMPONENT-NAME], [CANDIDATE-LIB-NAMES],
	290	# [PREFERRED-RT-OPT], [HEADER-NAME], [CXX-TEST],
	291	# [CXX-PROLOGUE])
	292	# --------------------------------------------------------------
	293	# Look for the Boost library COMPONENT-NAME (e.g., `thread', for
	294	# libboost_thread) under the possible CANDIDATE-LIB-NAMES (e.g.,
	295	# "thread_win32 thread"). Check that HEADER-NAME works and check that
	296	# libboost_LIB-NAME can link with the code CXX-TEST. The optional
	297	# argument CXX-PROLOGUE can be used to include some C++ code before
	298	# the `main' function.
[79de12]	299	#
	300	# Invokes BOOST_FIND_HEADER([HEADER-NAME]) (see above).
	301	#
	302	# Boost libraries typically come compiled with several flavors (with different
	303	# runtime options) so PREFERRED-RT-OPT is the preferred suffix. A suffix is one
	304	# or more of the following letters: sgdpn (in that order). s = static
	305	# runtime, d = debug build, g = debug/diagnostic runtime, p = STLPort build,
	306	# n = (unsure) STLPort build without iostreams from STLPort (it looks like `n'
	307	# must always be used along with `p'). Additionally, PREFERRED-RT-OPT can
	308	# start with `mt-' to indicate that there is a preference for multi-thread
	309	# builds. Some sample values for PREFERRED-RT-OPT: (nothing), mt, d, mt-d, gdp
	310	# ... If you want to make sure you have a specific version of Boost
	311	# (eg, >= 1.33) you must invoke BOOST_REQUIRE before this macro.
[3b35e7]	312	AC_DEFUN([BOOST_FIND_LIBS],
[79de12]	313	[AC_REQUIRE([BOOST_REQUIRE])dnl
	314	AC_REQUIRE([_BOOST_FIND_COMPILER_TAG])dnl
	315	AC_REQUIRE([BOOST_STATIC])dnl
	316	AC_REQUIRE([_BOOST_GUESS_WHETHER_TO_USE_MT])dnl
	317	if test x"$boost_cv_inc_path" = xno; then
	318	AC_MSG_NOTICE([Boost not available, not searching for the Boost $1 library])
	319	else
	320	dnl The else branch is huge and wasn't intended on purpose.
	321	AC_LANG_PUSH([C++])dnl
	322	AS_VAR_PUSHDEF([Boost_lib], [boost_cv_lib_$1])dnl
	323	AS_VAR_PUSHDEF([Boost_lib_LDFLAGS], [boost_cv_lib_$1_LDFLAGS])dnl
	324	AS_VAR_PUSHDEF([Boost_lib_LDPATH], [boost_cv_lib_$1_LDPATH])dnl
	325	AS_VAR_PUSHDEF([Boost_lib_LIBS], [boost_cv_lib_$1_LIBS])dnl
[3b35e7]	326	BOOST_FIND_HEADER([$4])
[79de12]	327	boost_save_CPPFLAGS=$CPPFLAGS
	328	CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
	329	AC_CACHE_CHECK([for the Boost $1 library], [Boost_lib],
[3b35e7]	330	[_BOOST_FIND_LIBS($@)])
	331	case $Boost_lib in #(
	332	(no) _AC_MSG_LOG_CONFTEST
	333	AC_MSG_ERROR([cannot find the flags to link with Boost $1])
	334	;;
	335	esac
	336	AC_SUBST(AS_TR_CPP([BOOST_$1_LDFLAGS]), [$Boost_lib_LDFLAGS])dnl
	337	AC_SUBST(AS_TR_CPP([BOOST_$1_LDPATH]), [$Boost_lib_LDPATH])dnl
	338	AC_SUBST([BOOST_LDPATH], [$Boost_lib_LDPATH])dnl
	339	AC_SUBST(AS_TR_CPP([BOOST_$1_LIBS]), [$Boost_lib_LIBS])dnl
	340	CPPFLAGS=$boost_save_CPPFLAGS
	341	AS_VAR_POPDEF([Boost_lib])dnl
	342	AS_VAR_POPDEF([Boost_lib_LDFLAGS])dnl
	343	AS_VAR_POPDEF([Boost_lib_LDPATH])dnl
	344	AS_VAR_POPDEF([Boost_lib_LIBS])dnl
	345	AC_LANG_POP([C++])dnl
	346	fi
	347	])
	348
	349
	350	# BOOST_FIND_LIB([LIB-NAME],
	351	# [PREFERRED-RT-OPT], [HEADER-NAME], [CXX-TEST],
	352	# [CXX-PROLOGUE])
	353	# --------------------------------------------------------------
	354	# Backward compatibility wrapper for BOOST_FIND_LIBS.
	355	AC_DEFUN([BOOST_FIND_LIB],
	356	[BOOST_FIND_LIBS([$1], $@)])
	357
	358
	359	# _BOOST_FIND_LIBS([LIB-NAME], [CANDIDATE-LIB-NAMES],
	360	# [PREFERRED-RT-OPT], [HEADER-NAME], [CXX-TEST],
	361	# [CXX-PROLOGUE])
	362	# --------------------------------------------------------------
	363	# Real implementation of BOOST_FIND_LIBS: rely on these local macros:
	364	# Boost_lib, Boost_lib_LDFLAGS, Boost_lib_LDPATH, Boost_lib_LIBS
	365	#
	366	# The algorithm is as follows: first look for a given library name
	367	# according to the user's PREFERRED-RT-OPT. For each library name, we
	368	# prefer to use the ones that carry the tag (toolset name). Each
	369	# library is searched through the various standard paths were Boost is
	370	# usually installed. If we can't find the standard variants, we try
	371	# to enforce -mt (for instance on MacOSX, libboost_thread.dylib
	372	# doesn't exist but there's -obviously- libboost_thread-mt.dylib).
	373	AC_DEFUN([_BOOST_FIND_LIBS],
	374	[Boost_lib=no
	375	case "$3" in #(
	376	(mt \| mt-) boost_mt=-mt; boost_rtopt=;; #(
	377	(mt* \| mt-) boost_mt=-mt; boost_rtopt=`expr "X$3" : 'Xmt-\(.*\)'`;; #(
	378	(*) boost_mt=; boost_rtopt=$3;;
[79de12]	379	esac
	380	if test $enable_static_boost = yes; then
	381	boost_rtopt="s$boost_rtopt"
	382	fi
	383	# Find the proper debug variant depending on what we've been asked to find.
	384	case $boost_rtopt in #(
[3b35e7]	385	(d) boost_rt_d=$boost_rtopt;; #(
	386	([[sgpn]]) # Insert the `d' at the right place (in between `sg' and `pn')
[79de12]	387	boost_rt_d=`echo "$boost_rtopt" \| sed 's/\(sg\)\(pn\)/\1\2/'`;; #(
[3b35e7]	388	(*) boost_rt_d='-d';;
[79de12]	389	esac
	390	# If the PREFERRED-RT-OPT are not empty, prepend a `-'.
	391	test -n "$boost_rtopt" && boost_rtopt="-$boost_rtopt"
	392	$boost_guess_use_mt && boost_mt=-mt
	393	# Look for the abs path the static archive.
	394	# $libext is computed by Libtool but let's make sure it's non empty.
	395	test -z "$libext" &&
	396	AC_MSG_ERROR([the libext variable is empty, did you invoke Libtool?])
	397	boost_save_ac_objext=$ac_objext
	398	# Generate the test file.
[3b35e7]	399	AC_LANG_CONFTEST([AC_LANG_PROGRAM([#include <$4>
	400	$6], [$5])])
[79de12]	401	dnl Optimization hacks: compiling C++ is slow, especially with Boost. What
	402	dnl we're trying to do here is guess the right combination of link flags
	403	dnl (LIBS / LDFLAGS) to use a given library. This can take several
	404	dnl iterations before it succeeds and is thus very slow. So what we do
	405	dnl instead is that we compile the code first (and thus get an object file,
	406	dnl typically conftest.o). Then we try various combinations of link flags
	407	dnl until we succeed to link conftest.o in an executable. The problem is
	408	dnl that the various TRY_LINK / COMPILE_IFELSE macros of Autoconf always
	409	dnl remove all the temporary files including conftest.o. So the trick here
	410	dnl is to temporarily change the value of ac_objext so that conftest.o is
	411	dnl preserved accross tests. This is obviously fragile and I will burn in
	412	dnl hell for not respecting Autoconf's documented interfaces, but in the
	413	dnl mean time, it optimizes the macro by a factor of 5 to 30.
	414	dnl Another small optimization: the first argument of AC_COMPILE_IFELSE left
	415	dnl empty because the test file is generated only once above (before we
	416	dnl start the for loops).
	417	AC_COMPILE_IFELSE([],
	418	[ac_objext=do_not_rm_me_plz],
	419	[AC_MSG_ERROR([cannot compile a test that uses Boost $1])])
	420	ac_objext=$boost_save_ac_objext
	421	boost_failed_libs=
[3b35e7]	422	# Don't bother to ident the following nested for loops, only the 2
	423	# innermost ones matter.
	424	for boost_lib_ in $2; do
[79de12]	425	for boost_tag_ in -$boost_cv_lib_tag ''; do
	426	for boost_ver_ in -$boost_cv_lib_version ''; do
[3b35e7]	427	for boost_mt_ in $boost_mt -mt ''; do
[79de12]	428	for boost_rtopt_ in $boost_rtopt '' -d; do
	429	for boost_lib in \
[3b35e7]	430	boost_$boost_lib_$boost_tag_$boost_mt_$boost_rtopt_$boost_ver_ \
	431	boost_$boost_lib_$boost_tag_$boost_rtopt_$boost_ver_ \
	432	boost_$boost_lib_$boost_tag_$boost_mt_$boost_ver_ \
	433	boost_$boost_lib_$boost_tag_$boost_ver_
[79de12]	434	do
	435	# Avoid testing twice the same lib
	436	case $boost_failed_libs in #(
[3b35e7]	437	(@$boost_lib@) continue;;
[79de12]	438	esac
	439	# If with_boost is empty, we'll search in /lib first, which is not quite
	440	# right so instead we'll try to a location based on where the headers are.
	441	boost_tmp_lib=$with_boost
	442	test x"$with_boost" = x && boost_tmp_lib=${boost_cv_inc_path%/include}
	443	for boost_ldpath in "$boost_tmp_lib/lib" '' \
[3b35e7]	444	/opt/local/lib* /usr/local/lib* /opt/lib* /usr/lib* \
	445	"$with_boost" C:/Boost/lib /lib*
[79de12]	446	do
[3b35e7]	447	# Don't waste time with directories that don't exist.
	448	if test x"$boost_ldpath" != x && test ! -e "$boost_ldpath"; then
	449	continue
	450	fi
[79de12]	451	boost_save_LDFLAGS=$LDFLAGS
	452	# Are we looking for a static library?
	453	case $boost_ldpath:$boost_rtopt_ in #(
[3b35e7]	454	(?:s) # Yes (Non empty boost_ldpath + s in rt opt)
[79de12]	455	Boost_lib_LIBS="$boost_ldpath/lib$boost_lib.$libext"
	456	test -e "$Boost_lib_LIBS" \|\| continue;; #(
[3b35e7]	457	(*) # No: use -lboost_foo to find the shared library.
[79de12]	458	Boost_lib_LIBS="-l$boost_lib";;
	459	esac
	460	boost_save_LIBS=$LIBS
	461	LIBS="$Boost_lib_LIBS $LIBS"
	462	test x"$boost_ldpath" != x && LDFLAGS="$LDFLAGS -L$boost_ldpath"
	463	dnl First argument of AC_LINK_IFELSE left empty because the test file is
	464	dnl generated only once above (before we start the for loops).
	465	_BOOST_AC_LINK_IFELSE([],
	466	[Boost_lib=yes], [Boost_lib=no])
	467	ac_objext=$boost_save_ac_objext
	468	LDFLAGS=$boost_save_LDFLAGS
	469	LIBS=$boost_save_LIBS
	470	if test x"$Boost_lib" = xyes; then
[3b35e7]	471	# Check or used cached result of whether or not using -R or
	472	# -rpath makes sense. Some implementations of ld, such as for
	473	# Mac OSX, require -rpath but -R is the flag known to work on
	474	# other systems. https://github.com/tsuna/boost.m4/issues/19
	475	AC_CACHE_VAL([boost_cv_rpath_link_ldflag],
	476	[case $boost_ldpath in
	477	'') # Nothing to do.
	478	boost_cv_rpath_link_ldflag=
	479	boost_rpath_link_ldflag_found=yes;;
	480	*)
	481	for boost_cv_rpath_link_ldflag in -Wl,-R, -Wl,-rpath,; do
	482	LDFLAGS="$boost_save_LDFLAGS -L$boost_ldpath $boost_cv_rpath_link_ldflag$boost_ldpath"
	483	LIBS="$boost_save_LIBS $Boost_lib_LIBS"
	484	_BOOST_AC_LINK_IFELSE([],
	485	[boost_rpath_link_ldflag_found=yes
	486	break],
	487	[boost_rpath_link_ldflag_found=no])
	488	done
	489	;;
	490	esac
	491	AS_IF([test "x$boost_rpath_link_ldflag_found" != "xyes"],
	492	[AC_MSG_ERROR([Unable to determine whether to use -R or -rpath])])
	493	LDFLAGS=$boost_save_LDFLAGS
	494	LIBS=$boost_save_LIBS
	495	])
	496	test x"$boost_ldpath" != x &&
	497	Boost_lib_LDFLAGS="-L$boost_ldpath $boost_cv_rpath_link_ldflag$boost_ldpath"
[79de12]	498	Boost_lib_LDPATH="$boost_ldpath"
[3b35e7]	499	break 7
[79de12]	500	else
	501	boost_failed_libs="$boost_failed_libs@$boost_lib@"
	502	fi
	503	done
	504	done
	505	done
	506	done
	507	done
	508	done
[3b35e7]	509	done # boost_lib_
[79de12]	510	rm -f conftest.$ac_objext
	511	])
[3b35e7]	512
[79de12]	513
	514
	515	# --------------------------------------- #
	516	# Checks for the various Boost libraries. #
	517	# --------------------------------------- #
	518
	519	# List of boost libraries: http://www.boost.org/libs/libraries.htm
	520	# The page http://beta.boost.org/doc/libs is useful: it gives the first release
	521	# version of each library (among other things).
	522
	523	# BOOST_DEFUN(LIBRARY, CODE)
	524	# --------------------------
	525	# Define BOOST_<LIBRARY-UPPERCASE> as a macro that runs CODE.
	526	#
	527	# Use indir to avoid the warning on underquoted macro name given to AC_DEFUN.
	528	m4_define([BOOST_DEFUN],
	529	[m4_indir([AC_DEFUN],
	530	m4_toupper([BOOST_$1]),
	531	[m4_pushdef([BOOST_Library], [$1])dnl
	532	$2
	533	m4_popdef([BOOST_Library])dnl
	534	])
	535	])
	536
[f08ae7]	537
	538	# BOOST_ANY()
	539	# ------------
	540	# Look for Boost.Any
	541	BOOST_DEFUN([Any],
	542	[BOOST_FIND_HEADER([boost/any.hpp])])
	543
	544
[79de12]	545	# BOOST_ARRAY()
	546	# -------------
	547	# Look for Boost.Array
	548	BOOST_DEFUN([Array],
	549	[BOOST_FIND_HEADER([boost/array.hpp])])
	550
	551
	552	# BOOST_ASIO()
	553	# ------------
	554	# Look for Boost.Asio (new in Boost 1.35).
	555	BOOST_DEFUN([Asio],
	556	[AC_REQUIRE([BOOST_SYSTEM])dnl
	557	BOOST_FIND_HEADER([boost/asio.hpp])])
	558
[4f04ab8]	559	# BOOST_BIMAP()
	560	# ------------
	561	# Look for Boost.Bimap
	562	BOOST_DEFUN([Bimap],
	563	[BOOST_FIND_HEADER([boost/bimap.hpp])])
[79de12]	564
[3b35e7]	565
[aed262]	566	# BOOST_ASSIGN()
	567	# -------------
	568	# Look for Boost.Assign
	569	BOOST_DEFUN([Assign],
	570	[BOOST_FIND_HEADER([boost/assign.hpp])])
	571
	572
[79de12]	573	# BOOST_BIND()
	574	# ------------
[3b35e7]	575	# Look for Boost.Bind.
[79de12]	576	BOOST_DEFUN([Bind],
	577	[BOOST_FIND_HEADER([boost/bind.hpp])])
	578
[3b35e7]	579
[503acc1]	580	# BOOST_CAST()
	581	# ------------
	582	# Look for Boost.Cast
	583	BOOST_DEFUN([Cast],
	584	[BOOST_FIND_HEADER([boost/cast.hpp])])
[79de12]	585
[3b35e7]	586
	587	# BOOST_CHRONO()
	588	# --------------
	589	# Look for Boost.Chrono.
	590	BOOST_DEFUN([Chrono],
	591	[# Do we have to check for Boost.System? This link-time dependency was
	592	# added as of 1.35.0. If we have a version <1.35, we must not attempt to
	593	# find Boost.System as it didn't exist by then.
	594	if test $boost_major_version -ge 135; then
	595	BOOST_SYSTEM([$1])
	596	fi # end of the Boost.System check.
	597	boost_filesystem_save_LIBS=$LIBS
	598	boost_filesystem_save_LDFLAGS=$LDFLAGS
	599	m4_pattern_allow([^BOOST_SYSTEM_(LIBS\|LDFLAGS)$])dnl
	600	LIBS="$LIBS $BOOST_SYSTEM_LIBS"
	601	LDFLAGS="$LDFLAGS $BOOST_SYSTEM_LDFLAGS"
	602	BOOST_FIND_LIB([chrono], [$1],
	603	[boost/chrono.hpp],
	604	[boost::chrono::thread_clock d;])
	605	if test $enable_static_boost = yes && test $boost_major_version -ge 135; then
[aed262]	606	BOOST_CHRONO_LIBS="$BOOST_CHRONO_LIBS $BOOST_SYSTEM_LIBS"
[3b35e7]	607	fi
	608	LIBS=$boost_filesystem_save_LIBS
	609	LDFLAGS=$boost_filesystem_save_LDFLAGS
	610	])# BOOST_CHRONO
	611
	612
[aed262]	613	# BOOST_CONTEXT([PREFERRED-RT-OPT])
	614	# -----------------------------------
	615	# Look for Boost.Context. For the documentation of PREFERRED-RT-OPT, see the
	616	# documentation of BOOST_FIND_LIB above.
	617	#
	618	# * This library was introduced in Boost 1.51.0
	619	# * The signatures of make_fcontext() and jump_fcontext were changed in 1.56.0
	620	# * A dependency on boost_thread appears in 1.57.0
	621	BOOST_DEFUN([Context],
	622	[boost_context_save_LIBS=$LIBS
	623	boost_context_save_LDFLAGS=$LDFLAGS
	624	if test $boost_major_version -ge 157; then
	625	BOOST_THREAD([$1])
	626	m4_pattern_allow([^BOOST_THREAD_(LIBS\|LDFLAGS)$])dnl
	627	LIBS="$LIBS $BOOST_THREAD_LIBS"
	628	LDFLAGS="$LDFLAGS $BOOST_THREAD_LDFLAGS"
	629	fi
	630	BOOST_FIND_LIB([context], [$1],
	631	[boost/context/all.hpp],[[
	632
	633	// creates a stack
	634	void * stack_pointer = new void*[4096];
	635	std::size_t const size = sizeof(void*[4096]);
	636
	637	#if BOOST_VERSION <= 105100
	638	ctx::make_fcontext(&fc, f);
	639	return ctx::jump_fcontext(&fcm, &fc, 3) == 6;
	640
	641	#else
	642
	643	fc = ctx::make_fcontext(stack_pointer, size, f);
	644	return ctx::jump_fcontext(&fcm, fc, 3) == 6;
	645
	646	#endif
	647
	648
	649	]],[dnl
	650
	651	#include <boost/version.hpp>
	652	#if BOOST_VERSION <= 105100
	653
	654	namespace ctx = boost::ctx;
	655
	656	static ctx::fcontext_t fcm, fc;
	657
	658	static void f(intptr_t i) {
	659	ctx::jump_fcontext(&fc, &fcm, i * 2);
	660	}
	661
	662	#elif BOOST_VERSION <= 105500
	663
	664	namespace ctx = boost::context;
	665
	666	// context
	667	static ctx::fcontext_t fcm, *fc;
	668
	669	// context-function
	670	static void f(intptr_t i) {
	671	ctx::jump_fcontext(fc, &fcm, i * 2);
	672	}
	673
	674	#else
	675
	676	namespace ctx = boost::context;
	677
	678	// context
	679	static ctx::fcontext_t fcm, fc;
	680
	681	// context-function
	682	static void f(intptr_t i) {
	683	ctx::jump_fcontext(&fc, fcm, i * 2);
	684	}
	685	#endif
	686	])
	687	LIBS=$boost_context_save_LIBS
	688	LDFLAGS=$boost_context_save_LDFLAGS
	689	])# BOOST_CONTEXT
	690
	691
[79de12]	692	# BOOST_CONVERSION()
	693	# ------------------
	694	# Look for Boost.Conversion (cast / lexical_cast)
	695	BOOST_DEFUN([Conversion],
	696	[BOOST_FIND_HEADER([boost/cast.hpp])
	697	BOOST_FIND_HEADER([boost/lexical_cast.hpp])
	698	])# BOOST_CONVERSION
	699
	700
[aed262]	701	# BOOST_COROUTINE([PREFERRED-RT-OPT])
	702	# -----------------------------------
	703	# Look for Boost.Coroutine. For the documentation of PREFERRED-RT-OPT, see the
	704	# documentation of BOOST_FIND_LIB above. This library was introduced in Boost
	705	# 1.53.0
	706	BOOST_DEFUN([Coroutine],
	707	[
	708	boost_coroutine_save_LIBS=$LIBS
	709	boost_coroutine_save_LDFLAGS=$LDFLAGS
	710	# Link-time dependency from coroutine to context
	711	BOOST_CONTEXT([$1])
	712	# Starting from Boost 1.55 a dependency on Boost.System is added
	713	if test $boost_major_version -ge 155; then
	714	BOOST_SYSTEM([$1])
	715	fi
	716	m4_pattern_allow([^BOOST_(CONTEXT\|SYSTEM)_(LIBS\|LDFLAGS)])
	717	LIBS="$LIBS $BOOST_CONTEXT_LIBS $BOOST_SYSTEM_LIBS"
	718	LDFLAGS="$LDFLAGS $BOOST_CONTEXT_LDFLAGS"
	719
	720	# in 1.53 coroutine was a header only library
	721	if test $boost_major_version -eq 153; then
	722	BOOST_FIND_HEADER([boost/coroutine/coroutine.hpp])
	723	else
	724	BOOST_FIND_LIB([coroutine], [$1],
	725	[boost/coroutine/coroutine.hpp],
	726	[
	727	#include <boost/version.hpp>
	728	#if BOOST_VERSION <= 105500
	729	boost::coroutines::coroutine<int(int)> coro; coro.get();
	730	#else
	731	boost::coroutines::asymmetric_coroutine<int>::pull_type coro; coro.get();
	732	#endif
	733	])
	734	fi
	735	# Link-time dependency from coroutine to context, existed only in 1.53, in 1.54
	736	# coroutine doesn't use context from its headers but from its library.
	737	if test $boost_major_version -eq 153 \|\| test $enable_static_boost = yes && test $boost_major_version -ge 154; then
	738	BOOST_COROUTINE_LIBS="$BOOST_COROUTINE_LIBS $BOOST_CONTEXT_LIBS"
	739	BOOST_COROUTINE_LDFLAGS="$BOOST_COROUTINE_LDFLAGS $BOOST_CONTEXT_LDFLAGS"
	740	fi
	741	if test $enable_static_boost = yes && test $boost_major_version -ge 155; then
	742	BOOST_COROUTINE_LIBS="$BOOST_COROUTINE_LIBS $BOOST_SYSTEM_LIBS"
	743	BOOST_COROUTINE_LDFLAGS="$BOOST_COROUTINE_LDFLAGS $BOOST_SYSTEM_LDFLAGS"
	744	fi
	745	LIBS=$boost_coroutine_save_LIBS
	746	LDFLAGS=$boost_coroutine_save_LDFLAGS
	747	])# BOOST_COROUTINE
	748
	749
[3b35e7]	750	# BOOST_CRC()
	751	# -----------
	752	# Look for Boost.CRC
	753	BOOST_DEFUN([CRC],
	754	[BOOST_FIND_HEADER([boost/crc.hpp])
	755	])# BOOST_CRC
	756
	757
[79de12]	758	# BOOST_DATE_TIME([PREFERRED-RT-OPT])
	759	# -----------------------------------
	760	# Look for Boost.Date_Time. For the documentation of PREFERRED-RT-OPT, see the
	761	# documentation of BOOST_FIND_LIB above.
	762	BOOST_DEFUN([Date_Time],
	763	[BOOST_FIND_LIB([date_time], [$1],
	764	[boost/date_time/posix_time/posix_time.hpp],
	765	[boost::posix_time::ptime t;])
	766	])# BOOST_DATE_TIME
	767
	768
	769	# BOOST_EXCEPTION()
[f08ae7]	770	# ------------
[79de12]	771	# Look for Boost.Exception
	772	BOOST_DEFUN([Exception],
	773	[BOOST_FIND_HEADER([boost/exception/all.hpp])])
	774
	775
	776	# BOOST_FILESYSTEM([PREFERRED-RT-OPT])
	777	# ------------------------------------
	778	# Look for Boost.Filesystem. For the documentation of PREFERRED-RT-OPT, see
	779	# the documentation of BOOST_FIND_LIB above.
	780	# Do not check for boost/filesystem.hpp because this file was introduced in
	781	# 1.34.
	782	BOOST_DEFUN([Filesystem],
	783	[# Do we have to check for Boost.System? This link-time dependency was
	784	# added as of 1.35.0. If we have a version <1.35, we must not attempt to
	785	# find Boost.System as it didn't exist by then.
	786	if test $boost_major_version -ge 135; then
[3b35e7]	787	BOOST_SYSTEM([$1])
[79de12]	788	fi # end of the Boost.System check.
	789	boost_filesystem_save_LIBS=$LIBS
	790	boost_filesystem_save_LDFLAGS=$LDFLAGS
	791	m4_pattern_allow([^BOOST_SYSTEM_(LIBS\|LDFLAGS)$])dnl
	792	LIBS="$LIBS $BOOST_SYSTEM_LIBS"
	793	LDFLAGS="$LDFLAGS $BOOST_SYSTEM_LDFLAGS"
	794	BOOST_FIND_LIB([filesystem], [$1],
	795	[boost/filesystem/path.hpp], [boost::filesystem::path p;])
	796	if test $enable_static_boost = yes && test $boost_major_version -ge 135; then
[3b35e7]	797	BOOST_FILESYSTEM_LIBS="$BOOST_FILESYSTEM_LIBS $BOOST_SYSTEM_LIBS"
[79de12]	798	fi
	799	LIBS=$boost_filesystem_save_LIBS
	800	LDFLAGS=$boost_filesystem_save_LDFLAGS
	801	])# BOOST_FILESYSTEM
	802
	803
[3b35e7]	804	# BOOST_FLYWEIGHT()
	805	# -----------------
	806	# Look for Boost.Flyweight.
	807	BOOST_DEFUN([Flyweight],
	808	[dnl There's a hidden dependency on pthreads.
	809	AC_REQUIRE([_BOOST_PTHREAD_FLAG])dnl
	810	BOOST_FIND_HEADER([boost/flyweight.hpp])
	811	AC_SUBST([BOOST_FLYWEIGHT_LIBS], [$boost_cv_pthread_flag])
	812	])
	813
	814
[79de12]	815	# BOOST_FOREACH()
	816	# ---------------
[3b35e7]	817	# Look for Boost.Foreach.
[79de12]	818	BOOST_DEFUN([Foreach],
	819	[BOOST_FIND_HEADER([boost/foreach.hpp])])
	820
	821
	822	# BOOST_FORMAT()
	823	# --------------
[3b35e7]	824	# Look for Boost.Format.
[79de12]	825	# Note: we can't check for boost/format/format_fwd.hpp because the header isn't
	826	# standalone. It can't be compiled because it triggers the following error:
	827	# boost/format/detail/config_macros.hpp:88: error: 'locale' in namespace 'std'
	828	# does not name a type
	829	BOOST_DEFUN([Format],
	830	[BOOST_FIND_HEADER([boost/format.hpp])])
	831
	832
	833	# BOOST_FUNCTION()
	834	# ----------------
	835	# Look for Boost.Function
	836	BOOST_DEFUN([Function],
	837	[BOOST_FIND_HEADER([boost/function.hpp])])
	838
	839
[aed262]	840	# BOOST_FUSION()
	841	# -----------------
	842	# Look for Boost.Fusion
	843	BOOST_DEFUN([Fusion],
	844	[BOOST_FIND_HEADER([boost/fusion/sequence.hpp])])
	845
	846
[3b35e7]	847	# BOOST_GEOMETRY()
[619a0e]	848	# ----------------
[3b35e7]	849	# Look for Boost.Geometry (new since 1.47.0).
	850	BOOST_DEFUN([Geometry],
	851	[BOOST_FIND_HEADER([boost/geometry.hpp])
	852	])# BOOST_GEOMETRY
[619a0e]	853
	854
[79de12]	855	# BOOST_GRAPH([PREFERRED-RT-OPT])
	856	# -------------------------------
	857	# Look for Boost.Graphs. For the documentation of PREFERRED-RT-OPT, see the
	858	# documentation of BOOST_FIND_LIB above.
	859	BOOST_DEFUN([Graph],
[aed262]	860	[boost_graph_save_LIBS=$LIBS
	861	boost_graph_save_LDFLAGS=$LDFLAGS
	862	# Link-time dependency from graph to regex was added as of 1.40.0.
	863	if test $boost_major_version -ge 140; then
	864	BOOST_REGEX([$1])
	865	m4_pattern_allow([^BOOST_REGEX_(LIBS\|LDFLAGS)$])dnl
	866	LIBS="$LIBS $BOOST_REGEX_LIBS"
	867	LDFLAGS="$LDFLAGS $BOOST_REGEX_LDFLAGS"
	868	fi
	869	BOOST_FIND_LIB([graph], [$1],
[79de12]	870	[boost/graph/adjacency_list.hpp], [boost::adjacency_list<> g;])
[aed262]	871	LIBS=$boost_graph_save_LIBS
	872	LDFLAGS=$boost_graph_save_LDFLAGS
[79de12]	873	])# BOOST_GRAPH
	874
	875
[aed262]	876	# BOOST_HASH()
	877	# ------------
	878	# Look for Boost.Functional/Hash
	879	BOOST_DEFUN([Hash],
	880	[BOOST_FIND_HEADER([boost/functional/hash.hpp])])
	881
	882
[79de12]	883	# BOOST_IOSTREAMS([PREFERRED-RT-OPT])
	884	# -----------------------------------
	885	# Look for Boost.IOStreams. For the documentation of PREFERRED-RT-OPT, see the
	886	# documentation of BOOST_FIND_LIB above.
	887	BOOST_DEFUN([IOStreams],
	888	[BOOST_FIND_LIB([iostreams], [$1],
	889	[boost/iostreams/device/file_descriptor.hpp],
	890	[boost::iostreams::file_descriptor fd; fd.close();])
	891	])# BOOST_IOSTREAMS
	892
	893
[f08ae7]	894	# BOOST_ITERATOR()
	895	# ------------
	896	# Look for Boost.Iterator
	897	BOOST_DEFUN([Iterator],
	898	[BOOST_FIND_HEADER([boost/iterator/iterator_adaptor.hpp])])
	899
	900
[79de12]	901	# BOOST_LAMBDA()
	902	# --------------
	903	# Look for Boost.Lambda
	904	BOOST_DEFUN([Lambda],
	905	[BOOST_FIND_HEADER([boost/lambda/lambda.hpp])])
	906
	907
[aed262]	908	# BOOST_LOCALE()
	909	# --------------
	910	# Look for Boost.Locale
	911	BOOST_DEFUN([Locale],
	912	[
	913	boost_locale_save_LIBS=$LIBS
	914	boost_locale_save_LDFLAGS=$LDFLAGS
	915	# require SYSTEM for boost-1.50.0 and up
	916	if test $boost_major_version -ge 150; then
	917	BOOST_SYSTEM([$1])
	918	m4_pattern_allow([^BOOST_SYSTEM_(LIBS\|LDFLAGS)$])dnl
	919	LIBS="$LIBS $BOOST_SYSTEM_LIBS"
	920	LDFLAGS="$LDFLAGS $BOOST_SYSTEM_LDFLAGS"
	921	fi # end of the Boost.System check.
	922	BOOST_FIND_LIB([locale], [$1],
	923	[boost/locale.hpp],
	924	[[boost::locale::generator gen; std::locale::global(gen(""));]])
	925	LIBS=$boost_locale_save_LIBS
	926	LDFLAGS=$boost_locale_save_LDFLAGS
	927	])# BOOST_LOCALE
	928
[f08ae7]	929	# BOOST_LOG([PREFERRED-RT-OPT])
	930	# -----------------------------
[3b35e7]	931	# Look for Boost.Log. For the documentation of PREFERRED-RT-OPT, see the
[f08ae7]	932	# documentation of BOOST_FIND_LIB above.
	933	BOOST_DEFUN([Log],
[aed262]	934	[boost_log_save_LIBS=$LIBS
	935	boost_log_save_LDFLAGS=$LDFLAGS
	936	BOOST_SYSTEM([$1])
	937	BOOST_FILESYSTEM([$1])
	938	BOOST_DATE_TIME([$1])
	939	m4_pattern_allow([^BOOST_(SYSTEM\|FILESYSTEM\|DATE_TIME)_(LIBS\|LDFLAGS)$])dnl
	940	LIBS="$LIBS $BOOST_DATE_TIME_LIBS $BOOST_FILESYSTEM_LIBS $BOOST_SYSTEM_LIBS"
	941	LDFLAGS="$LDFLAGS $BOOST_DATE_TIME_LDFLAGS $BOOST_FILESYSTEM_LDFLAGS $BOOST_SYSTEM_LDFLAGS"
	942	BOOST_FIND_LIB([log], [$1],
[f08ae7]	943	[boost/log/core/core.hpp],
	944	[boost::log::attribute a; a.get_value();])
[aed262]	945	LIBS=$boost_log_save_LIBS
	946	LDFLAGS=$boost_log_save_LDFLAGS
[f08ae7]	947	])# BOOST_LOG
	948
	949
	950	# BOOST_LOG_SETUP([PREFERRED-RT-OPT])
	951	# -----------------------------------
[3b35e7]	952	# Look for Boost.Log. For the documentation of PREFERRED-RT-OPT, see the
[f08ae7]	953	# documentation of BOOST_FIND_LIB above.
	954	BOOST_DEFUN([Log_Setup],
[aed262]	955	[boost_log_setup_save_LIBS=$LIBS
	956	boost_log_setup_save_LDFLAGS=$LDFLAGS
	957	BOOST_LOG([$1])
	958	m4_pattern_allow([^BOOST_LOG_(LIBS\|LDFLAGS)$])dnl
	959	LIBS="$LIBS $BOOST_LOG_LIBS"
	960	LDFLAGS="$LDFLAGS $BOOST_LOG_LDFLAGS"
[f08ae7]	961	BOOST_FIND_LIB([log_setup], [$1],
[3b35e7]	962	[boost/log/utility/setup/from_settings.hpp],
[f08ae7]	963	[boost::log::basic_settings<char> bs; bs.empty();])
[aed262]	964	LIBS=$boost_log_setup_save_LIBS
	965	LDFLAGS=$boost_log_setup_save_LDFLAGS
[f08ae7]	966	])# BOOST_LOG_SETUP
	967
	968
[79de12]	969	# BOOST_MATH()
	970	# ------------
	971	# Look for Boost.Math
	972	# TODO: This library isn't header-only but it comes in multiple different
	973	# flavors that don't play well with BOOST_FIND_LIB (e.g, libboost_math_c99,
	974	# libboost_math_c99f, libboost_math_c99l, libboost_math_tr1,
	975	# libboost_math_tr1f, libboost_math_tr1l). This macro must be fixed to do the
	976	# right thing anyway.
	977	BOOST_DEFUN([Math],
	978	[BOOST_FIND_HEADER([boost/math/special_functions.hpp])])
	979
	980
[3b35e7]	981	# BOOST_MPI([PREFERRED-RT-OPT])
	982	# -------------------------------
	983	# Look for Boost MPI. For the documentation of PREFERRED-RT-OPT, see the
	984	# documentation of BOOST_FIND_LIB above. Uses MPICXX variable if it is
	985	# set, otherwise tries CXX
	986	#
	987	BOOST_DEFUN([MPI],
	988	[boost_save_CXX=${CXX}
	989	boost_save_CXXCPP=${CXXCPP}
	990	if test x"${MPICXX}" != x; then
	991	CXX=${MPICXX}
	992	CXXCPP="${MPICXX} -E"
	993	fi
	994	BOOST_FIND_LIB([mpi], [$1],
	995	[boost/mpi.hpp],
	996	[int argc = 0;
	997	char **argv = 0;
	998	boost::mpi::environment env(argc,argv);])
	999	CXX=${boost_save_CXX}
	1000	CXXCPP=${boost_save_CXXCPP}
	1001	])# BOOST_MPI
[79de12]	1002
	1003
[3b35e7]	1004	# BOOST_MPL()
[619a0e]	1005	# ------------------
	1006	# Look for Boost.MPL
	1007	BOOST_DEFUN([MPL],
	1008	[BOOST_FIND_HEADER([boost/mpl/for_each.hpp])])
	1009
[3b35e7]	1010
	1011	# BOOST_MULTIARRAY()
	1012	# ------------------
	1013	# Look for Boost.MultiArray
	1014	BOOST_DEFUN([MultiArray],
	1015	[BOOST_FIND_HEADER([boost/multi_array.hpp])])
	1016
[aed262]	1017
[4da4de]	1018	# BOOST_MULTIINDEXCCONTAINER()
	1019	# ------------------
	1020	# Look for Boost.MultiIndexContainer
	1021	BOOST_DEFUN([MultiIndexContainer],
	1022	[BOOST_FIND_HEADER([boost/multi_index_container.hpp])])
	1023
[3b35e7]	1024
	1025	# BOOST_NUMERIC_UBLAS()
	1026	# --------------------------
	1027	# Look for Boost.NumericUblas (Basic Linear Algebra)
	1028	BOOST_DEFUN([Numeric_Ublas],
	1029	[BOOST_FIND_HEADER([boost/numeric/ublas/vector.hpp])
	1030	])# BOOST_NUMERIC_UBLAS
	1031
	1032
[79de12]	1033	# BOOST_NUMERIC_CONVERSION()
	1034	# --------------------------
	1035	# Look for Boost.NumericConversion (policy-based numeric conversion)
	1036	BOOST_DEFUN([Numeric_Conversion],
	1037	[BOOST_FIND_HEADER([boost/numeric/conversion/converter.hpp])
	1038	])# BOOST_NUMERIC_CONVERSION
	1039
	1040
	1041	# BOOST_OPTIONAL()
	1042	# ----------------
	1043	# Look for Boost.Optional
	1044	BOOST_DEFUN([Optional],
	1045	[BOOST_FIND_HEADER([boost/optional.hpp])])
	1046
	1047
	1048	# BOOST_PREPROCESSOR()
	1049	# --------------------
	1050	# Look for Boost.Preprocessor
	1051	BOOST_DEFUN([Preprocessor],
	1052	[BOOST_FIND_HEADER([boost/preprocessor/repeat.hpp])])
	1053
	1054
[613da6]	1055	# BOOST_PROPERTY_TREE([PREFERRED-RT-OPT])
	1056	# -----------------------------------------
	1057	# Look for Boost.Property_Tree. For the documentation of PREFERRED-RT-OPT,
	1058	# see the documentation of BOOST_FIND_LIB above.
	1059	BOOST_DEFUN([Property_Tree],
	1060	[BOOST_FIND_LIB([property_tree], [$1],
	1061	[boost/property_tree/ptree.hpp],
	1062	[boost::property_tree::ptree pt; boost::property_tree::read_xml d("test", pt);])
	1063	])# BOOST_PROPERTY_TREE
	1064
	1065
[f08ae7]	1066	# BOOST_RANDOM()
	1067	# --------------------
	1068	# Look for Boost.Random
	1069	BOOST_DEFUN([Random],
	1070	[BOOST_FIND_HEADER([boost/random/random_number_generator.hpp])])
	1071
	1072
[aed262]	1073	# BOOST_RANGE()
	1074	# --------------------
	1075	# Look for Boost.Range
	1076	BOOST_DEFUN([Range],
	1077	[BOOST_FIND_HEADER([boost/range/adaptors.hpp])])
	1078
[f08ae7]	1079	# BOOST_UNORDERED()
	1080	# -----------------
	1081	# Look for Boost.Unordered
	1082	BOOST_DEFUN([Unordered],
	1083	[BOOST_FIND_HEADER([boost/unordered_map.hpp])])
	1084
	1085
	1086	# BOOST_UUID()
	1087	# ------------
	1088	# Look for Boost.Uuid
	1089	BOOST_DEFUN([Uuid],
	1090	[BOOST_FIND_HEADER([boost/uuid/uuid.hpp])])
	1091
	1092
[79de12]	1093	# BOOST_PROGRAM_OPTIONS([PREFERRED-RT-OPT])
	1094	# -----------------------------------------
	1095	# Look for Boost.Program_options. For the documentation of PREFERRED-RT-OPT,
	1096	# see the documentation of BOOST_FIND_LIB above.
	1097	BOOST_DEFUN([Program_Options],
	1098	[BOOST_FIND_LIB([program_options], [$1],
	1099	[boost/program_options.hpp],
	1100	[boost::program_options::options_description d("test");])
	1101	])# BOOST_PROGRAM_OPTIONS
	1102
	1103
	1104
	1105	# _BOOST_PYTHON_CONFIG(VARIABLE, FLAG)
	1106	# ------------------------------------
	1107	# Save VARIABLE, and define it via `python-config --FLAG`.
	1108	# Substitute BOOST_PYTHON_VARIABLE.
	1109	m4_define([_BOOST_PYTHON_CONFIG],
	1110	[AC_SUBST([BOOST_PYTHON_$1],
	1111	[`python-config --$2 2>/dev/null`])dnl
	1112	boost_python_save_$1=$$1
	1113	$1="$$1 $BOOST_PYTHON_$1"])
	1114
	1115
	1116	# BOOST_PYTHON([PREFERRED-RT-OPT])
	1117	# --------------------------------
	1118	# Look for Boost.Python. For the documentation of PREFERRED-RT-OPT,
	1119	# see the documentation of BOOST_FIND_LIB above.
	1120	BOOST_DEFUN([Python],
	1121	[_BOOST_PYTHON_CONFIG([CPPFLAGS], [includes])
	1122	_BOOST_PYTHON_CONFIG([LDFLAGS], [ldflags])
	1123	_BOOST_PYTHON_CONFIG([LIBS], [libs])
	1124	m4_pattern_allow([^BOOST_PYTHON_MODULE$])dnl
[3b35e7]	1125	BOOST_FIND_LIBS([python], [python python3], [$1],
	1126	[boost/python.hpp],
	1127	[], [BOOST_PYTHON_MODULE(empty) {}])
[79de12]	1128	CPPFLAGS=$boost_python_save_CPPFLAGS
	1129	LDFLAGS=$boost_python_save_LDFLAGS
	1130	LIBS=$boost_python_save_LIBS
	1131	])# BOOST_PYTHON
	1132
	1133
	1134	# BOOST_REF()
	1135	# -----------
	1136	# Look for Boost.Ref
	1137	BOOST_DEFUN([Ref],
	1138	[BOOST_FIND_HEADER([boost/ref.hpp])])
	1139
	1140
	1141	# BOOST_REGEX([PREFERRED-RT-OPT])
	1142	# -------------------------------
	1143	# Look for Boost.Regex. For the documentation of PREFERRED-RT-OPT, see the
	1144	# documentation of BOOST_FIND_LIB above.
	1145	BOOST_DEFUN([Regex],
	1146	[BOOST_FIND_LIB([regex], [$1],
	1147	[boost/regex.hpp],
	1148	[boost::regex exp("*"); boost::regex_match("foo", exp);])
	1149	])# BOOST_REGEX
	1150
	1151
	1152	# BOOST_SERIALIZATION([PREFERRED-RT-OPT])
	1153	# ---------------------------------------
	1154	# Look for Boost.Serialization. For the documentation of PREFERRED-RT-OPT, see
	1155	# the documentation of BOOST_FIND_LIB above.
	1156	BOOST_DEFUN([Serialization],
	1157	[BOOST_FIND_LIB([serialization], [$1],
	1158	[boost/archive/text_oarchive.hpp],
	1159	[std::ostream* o = 0; // Cheap way to get an ostream...
	1160	boost::archive::text_oarchive t(*o);])
[f08ae7]	1161	])# BOOST_SERIALIZATION
[79de12]	1162
	1163
	1164	# BOOST_SIGNALS([PREFERRED-RT-OPT])
	1165	# ---------------------------------
	1166	# Look for Boost.Signals. For the documentation of PREFERRED-RT-OPT, see the
	1167	# documentation of BOOST_FIND_LIB above.
	1168	BOOST_DEFUN([Signals],
	1169	[BOOST_FIND_LIB([signals], [$1],
	1170	[boost/signal.hpp],
	1171	[boost::signal<void ()> s;])
	1172	])# BOOST_SIGNALS
	1173
	1174
[3b35e7]	1175	# BOOST_SIGNALS2()
	1176	# ----------------
	1177	# Look for Boost.Signals2 (new since 1.39.0).
	1178	BOOST_DEFUN([Signals2],
	1179	[BOOST_FIND_HEADER([boost/signals2.hpp])
	1180	])# BOOST_SIGNALS2
	1181
	1182
[79de12]	1183	# BOOST_SMART_PTR()
	1184	# -----------------
	1185	# Look for Boost.SmartPtr
	1186	BOOST_DEFUN([Smart_Ptr],
	1187	[BOOST_FIND_HEADER([boost/scoped_ptr.hpp])
	1188	BOOST_FIND_HEADER([boost/shared_ptr.hpp])
	1189	])
	1190
	1191
	1192	# BOOST_STATICASSERT()
	1193	# --------------------
	1194	# Look for Boost.StaticAssert
	1195	BOOST_DEFUN([StaticAssert],
	1196	[BOOST_FIND_HEADER([boost/static_assert.hpp])])
	1197
	1198
	1199	# BOOST_STRING_ALGO()
	1200	# -------------------
	1201	# Look for Boost.StringAlgo
	1202	BOOST_DEFUN([String_Algo],
	1203	[BOOST_FIND_HEADER([boost/algorithm/string.hpp])
	1204	])
	1205
	1206
	1207	# BOOST_SYSTEM([PREFERRED-RT-OPT])
	1208	# --------------------------------
	1209	# Look for Boost.System. For the documentation of PREFERRED-RT-OPT, see the
	1210	# documentation of BOOST_FIND_LIB above. This library was introduced in Boost
	1211	# 1.35.0.
	1212	BOOST_DEFUN([System],
	1213	[BOOST_FIND_LIB([system], [$1],
	1214	[boost/system/error_code.hpp],
	1215	[boost::system::error_code e; e.clear();])
	1216	])# BOOST_SYSTEM
	1217
	1218
	1219	# BOOST_TEST([PREFERRED-RT-OPT])
	1220	# ------------------------------
	1221	# Look for Boost.Test. For the documentation of PREFERRED-RT-OPT, see the
	1222	# documentation of BOOST_FIND_LIB above.
	1223	BOOST_DEFUN([Test],
	1224	[m4_pattern_allow([^BOOST_CHECK$])dnl
	1225	BOOST_FIND_LIB([unit_test_framework], [$1],
	1226	[boost/test/unit_test.hpp], [BOOST_CHECK(2 == 2);],
	1227	[using boost::unit_test::test_suite;
	1228	test_suite* init_unit_test_suite(int argc, char ** argv)
	1229	{ return NULL; }])
	1230	])# BOOST_TEST
	1231
	1232
[3b35e7]	1233	# BOOST_THREAD([PREFERRED-RT-OPT])
[79de12]	1234	# ---------------------------------
	1235	# Look for Boost.Thread. For the documentation of PREFERRED-RT-OPT, see the
	1236	# documentation of BOOST_FIND_LIB above.
[3b35e7]	1237	BOOST_DEFUN([Thread],
[79de12]	1238	[dnl Having the pthread flag is required at least on GCC3 where
	1239	dnl boost/thread.hpp would complain if we try to compile without
	1240	dnl -pthread on GNU/Linux.
	1241	AC_REQUIRE([_BOOST_PTHREAD_FLAG])dnl
[3b35e7]	1242	boost_thread_save_LIBS=$LIBS
	1243	boost_thread_save_LDFLAGS=$LDFLAGS
	1244	boost_thread_save_CPPFLAGS=$CPPFLAGS
	1245	# Link-time dependency from thread to system was added as of 1.49.0.
	1246	if test $boost_major_version -ge 149; then
	1247	BOOST_SYSTEM([$1])
	1248	fi # end of the Boost.System check.
	1249	m4_pattern_allow([^BOOST_SYSTEM_(LIBS\|LDFLAGS)$])dnl
	1250	LIBS="$LIBS $BOOST_SYSTEM_LIBS $boost_cv_pthread_flag"
	1251	LDFLAGS="$LDFLAGS $BOOST_SYSTEM_LDFLAGS"
[79de12]	1252	CPPFLAGS="$CPPFLAGS $boost_cv_pthread_flag"
[3b35e7]	1253
	1254	# When compiling for the Windows platform, the threads library is named
[aed262]	1255	# differently. This suffix doesn't exist in new versions of Boost, or
	1256	# possibly new versions of GCC on mingw I am assuming it's Boost's change for
	1257	# now and I am setting version to 1.48, for lack of knowledge as to when this
	1258	# change occurred.
	1259	if test $boost_major_version -lt 148; then
	1260	case $host_os in
	1261	(mingw) boost_thread_lib_ext=_win32;;
	1262	esac
	1263	fi
[3b35e7]	1264	BOOST_FIND_LIBS([thread], [thread$boost_thread_lib_ext],
	1265	[$1],
	1266	[boost/thread.hpp], [boost::thread t; boost::mutex m;])
	1267
[aed262]	1268	case $host_os in
	1269	(mingw) boost_thread_w32_socket_link=-lws2_32;;
	1270	esac
	1271
	1272	BOOST_THREAD_LIBS="$BOOST_THREAD_LIBS $BOOST_SYSTEM_LIBS $boost_cv_pthread_flag $boost_thread_w32_socket_link"
[3b35e7]	1273	BOOST_THREAD_LDFLAGS="$BOOST_SYSTEM_LDFLAGS"
[79de12]	1274	BOOST_CPPFLAGS="$BOOST_CPPFLAGS $boost_cv_pthread_flag"
[3b35e7]	1275	LIBS=$boost_thread_save_LIBS
	1276	LDFLAGS=$boost_thread_save_LDFLAGS
	1277	CPPFLAGS=$boost_thread_save_CPPFLAGS
	1278	])# BOOST_THREAD
	1279
	1280	AU_ALIAS([BOOST_THREADS], [BOOST_THREAD])
[79de12]	1281
	1282
	1283	# BOOST_TOKENIZER()
	1284	# -----------------
	1285	# Look for Boost.Tokenizer
	1286	BOOST_DEFUN([Tokenizer],
	1287	[BOOST_FIND_HEADER([boost/tokenizer.hpp])])
	1288
	1289
	1290	# BOOST_TRIBOOL()
	1291	# ---------------
	1292	# Look for Boost.Tribool
	1293	BOOST_DEFUN([Tribool],
	1294	[BOOST_FIND_HEADER([boost/logic/tribool_fwd.hpp])
	1295	BOOST_FIND_HEADER([boost/logic/tribool.hpp])
	1296	])
	1297
	1298
	1299	# BOOST_TUPLE()
	1300	# -------------
	1301	# Look for Boost.Tuple
	1302	BOOST_DEFUN([Tuple],
	1303	[BOOST_FIND_HEADER([boost/tuple/tuple.hpp])])
	1304
	1305
	1306	# BOOST_TYPETRAITS()
	1307	# --------------------
	1308	# Look for Boost.TypeTraits
	1309	BOOST_DEFUN([TypeTraits],
	1310	[BOOST_FIND_HEADER([boost/type_traits.hpp])])
	1311
	1312
	1313	# BOOST_UTILITY()
	1314	# ---------------
	1315	# Look for Boost.Utility (noncopyable, result_of, base-from-member idiom,
	1316	# etc.)
	1317	BOOST_DEFUN([Utility],
	1318	[BOOST_FIND_HEADER([boost/utility.hpp])])
	1319
	1320
	1321	# BOOST_VARIANT()
	1322	# ---------------
	1323	# Look for Boost.Variant.
	1324	BOOST_DEFUN([Variant],
	1325	[BOOST_FIND_HEADER([boost/variant/variant_fwd.hpp])
	1326	BOOST_FIND_HEADER([boost/variant.hpp])])
	1327
	1328
[3b35e7]	1329	# BOOST_POINTER_CONTAINER()
	1330	# ------------------------
	1331	# Look for Boost.PointerContainer
	1332	BOOST_DEFUN([Pointer_Container],
	1333	[BOOST_FIND_HEADER([boost/ptr_container/ptr_deque.hpp])
	1334	BOOST_FIND_HEADER([boost/ptr_container/ptr_list.hpp])
	1335	BOOST_FIND_HEADER([boost/ptr_container/ptr_vector.hpp])
	1336	BOOST_FIND_HEADER([boost/ptr_container/ptr_array.hpp])
	1337	BOOST_FIND_HEADER([boost/ptr_container/ptr_set.hpp])
	1338	BOOST_FIND_HEADER([boost/ptr_container/ptr_map.hpp])
	1339	])# BOOST_POINTER_CONTAINER
	1340
	1341
[79de12]	1342	# BOOST_WAVE([PREFERRED-RT-OPT])
	1343	# ------------------------------
	1344	# NOTE: If you intend to use Wave/Spirit with thread support, make sure you
[3b35e7]	1345	# call BOOST_THREAD first.
[79de12]	1346	# Look for Boost.Wave. For the documentation of PREFERRED-RT-OPT, see the
	1347	# documentation of BOOST_FIND_LIB above.
	1348	BOOST_DEFUN([Wave],
	1349	[AC_REQUIRE([BOOST_FILESYSTEM])dnl
	1350	AC_REQUIRE([BOOST_DATE_TIME])dnl
	1351	boost_wave_save_LIBS=$LIBS
	1352	boost_wave_save_LDFLAGS=$LDFLAGS
	1353	m4_pattern_allow([^BOOST_((FILE)?SYSTEM\|DATE_TIME\|THREAD)_(LIBS\|LDFLAGS)$])dnl
[3b35e7]	1354	LIBS="$LIBS $BOOST_SYSTEM_LIBS $BOOST_FILESYSTEM_LIBS $BOOST_DATE_TIME_LIBS \
[79de12]	1355	$BOOST_THREAD_LIBS"
[3b35e7]	1356	LDFLAGS="$LDFLAGS $BOOST_SYSTEM_LDFLAGS $BOOST_FILESYSTEM_LDFLAGS \
[79de12]	1357	$BOOST_DATE_TIME_LDFLAGS $BOOST_THREAD_LDFLAGS"
	1358	BOOST_FIND_LIB([wave], [$1],
	1359	[boost/wave.hpp],
	1360	[boost::wave::token_id id; get_token_name(id);])
	1361	LIBS=$boost_wave_save_LIBS
	1362	LDFLAGS=$boost_wave_save_LDFLAGS
	1363	])# BOOST_WAVE
	1364
	1365
	1366	# BOOST_XPRESSIVE()
	1367	# -----------------
	1368	# Look for Boost.Xpressive (new since 1.36.0).
	1369	BOOST_DEFUN([Xpressive],
	1370	[BOOST_FIND_HEADER([boost/xpressive/xpressive.hpp])])
	1371
	1372
	1373	# ----------------- #
	1374	# Internal helpers. #
	1375	# ----------------- #
	1376
	1377
	1378	# _BOOST_PTHREAD_FLAG()
	1379	# ---------------------
[3b35e7]	1380	# Internal helper for BOOST_THREAD. Computes boost_cv_pthread_flag
	1381	# which must be used in CPPFLAGS and LIBS.
	1382	#
	1383	# Yes, we need to put the -pthread thing in CPPFLAGS because with GCC3,
	1384	# boost/thread.hpp will trigger a #error if -pthread isn't used:
	1385	# boost/config/requires_threads.hpp:47:5: #error "Compiler threading support
	1386	# is not turned on. Please set the correct command line options for
	1387	# threading: -pthread (Linux), -pthreads (Solaris) or -mthreads (Mingw32)"
	1388	#
	1389	# Based on ACX_PTHREAD: http://autoconf-archive.cryp.to/acx_pthread.html
[79de12]	1390	AC_DEFUN([_BOOST_PTHREAD_FLAG],
	1391	[AC_REQUIRE([AC_PROG_CXX])dnl
	1392	AC_REQUIRE([AC_CANONICAL_HOST])dnl
	1393	AC_LANG_PUSH([C++])dnl
	1394	AC_CACHE_CHECK([for the flags needed to use pthreads], [boost_cv_pthread_flag],
	1395	[ boost_cv_pthread_flag=
	1396	# The ordering is (sometimes) important. Some notes on the
	1397	# individual items follow:
	1398	# (none): in case threads are in libc; should be tried before -Kthread and
	1399	# other compiler flags to prevent continual compiler warnings
	1400	# -lpthreads: AIX (must check this before -lpthread)
	1401	# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
	1402	# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
	1403	# -llthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
	1404	# -pthread: GNU Linux/GCC (kernel threads), BSD/GCC (userland threads)
	1405	# -pthreads: Solaris/GCC
	1406	# -mthreads: MinGW32/GCC, Lynx/GCC
	1407	# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
	1408	# doesn't hurt to check since this sometimes defines pthreads too;
	1409	# also defines -D_REENTRANT)
	1410	# ... -mt is also the pthreads flag for HP/aCC
	1411	# -lpthread: GNU Linux, etc.
	1412	# --thread-safe: KAI C++
	1413	case $host_os in #(
	1414	solaris)
	1415	# On Solaris (at least, for some versions), libc contains stubbed
	1416	# (non-functional) versions of the pthreads routines, so link-based
	1417	# tests will erroneously succeed. (We need to link with -pthreads/-mt/
	1418	# -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
	1419	# a function called by this macro, so we could check for that, but
	1420	# who knows whether they'll stub that too in a future libc.) So,
	1421	# we'll just look for -pthreads and -lpthread first:
	1422	boost_pthread_flags="-pthreads -lpthread -mt -pthread";; #(
	1423	*)
	1424	boost_pthread_flags="-lpthreads -Kthread -kthread -llthread -pthread \
	1425	-pthreads -mthreads -lpthread --thread-safe -mt";;
	1426	esac
	1427	# Generate the test file.
	1428	AC_LANG_CONFTEST([AC_LANG_PROGRAM([#include <pthread.h>],
	1429	[pthread_t th; pthread_join(th, 0);
	1430	pthread_attr_init(0); pthread_cleanup_push(0, 0);
	1431	pthread_create(0,0,0,0); pthread_cleanup_pop(0);])])
	1432	for boost_pthread_flag in '' $boost_pthread_flags; do
	1433	boost_pthread_ok=false
	1434	dnl Re-use the test file already generated.
	1435	boost_pthreads__save_LIBS=$LIBS
	1436	LIBS="$LIBS $boost_pthread_flag"
	1437	AC_LINK_IFELSE([],
	1438	[if grep ".*$boost_pthread_flag" conftest.err; then
	1439	echo "This flag seems to have triggered warnings" >&AS_MESSAGE_LOG_FD
	1440	else
	1441	boost_pthread_ok=:; boost_cv_pthread_flag=$boost_pthread_flag
	1442	fi])
	1443	LIBS=$boost_pthreads__save_LIBS
	1444	$boost_pthread_ok && break
	1445	done
	1446	])
	1447	AC_LANG_POP([C++])dnl
	1448	])# _BOOST_PTHREAD_FLAG
	1449
	1450
	1451	# _BOOST_gcc_test(MAJOR, MINOR)
	1452	# -----------------------------
	1453	# Internal helper for _BOOST_FIND_COMPILER_TAG.
	1454	m4_define([_BOOST_gcc_test],
	1455	["defined __GNUC__ && __GNUC__ == $1 && __GNUC_MINOR__ == $2 && !defined __ICC @ gcc$1$2"])dnl
	1456
[3b35e7]	1457	# _BOOST_mingw_test(MAJOR, MINOR)
	1458	# -----------------------------
	1459	# Internal helper for _BOOST_FIND_COMPILER_TAG.
	1460	m4_define([_BOOST_mingw_test],
	1461	["defined __GNUC__ && __GNUC__ == $1 && __GNUC_MINOR__ == $2 && !defined __ICC && \
	1462	(defined WIN32 \|\| defined WINNT \|\| defined _WIN32 \|\| defined __WIN32 \
	1463	\|\| defined __WIN32__ \|\| defined __WINNT \|\| defined __WINNT__) @ mgw$1$2"])dnl
	1464
[79de12]	1465
	1466	# _BOOST_FIND_COMPILER_TAG()
	1467	# --------------------------
	1468	# Internal. When Boost is installed without --layout=system, each library
	1469	# filename will hold a suffix that encodes the compiler used during the
	1470	# build. The Boost build system seems to call this a `tag'.
	1471	AC_DEFUN([_BOOST_FIND_COMPILER_TAG],
	1472	[AC_REQUIRE([AC_PROG_CXX])dnl
	1473	AC_REQUIRE([AC_CANONICAL_HOST])dnl
[aed262]	1474	AC_CACHE_CHECK([for the toolset name used by Boost for $CXX],
	1475	[boost_cv_lib_tag],
[79de12]	1476	[boost_cv_lib_tag=unknown
	1477	if test x$boost_cv_inc_path != xno; then
	1478	AC_LANG_PUSH([C++])dnl
	1479	# The following tests are mostly inspired by boost/config/auto_link.hpp
	1480	# The list is sorted to most recent/common to oldest compiler (in order
	1481	# to increase the likelihood of finding the right compiler with the
	1482	# least number of compilation attempt).
	1483	# Beware that some tests are sensible to the order (for instance, we must
	1484	# look for MinGW before looking for GCC3).
	1485	# I used one compilation test per compiler with a #error to recognize
	1486	# each compiler so that it works even when cross-compiling (let me know
	1487	# if you know a better approach).
	1488	# Known missing tags (known from Boost's tools/build/v2/tools/common.jam):
	1489	# como, edg, kcc, bck, mp, sw, tru, xlc
	1490	# I'm not sure about my test for `il' (be careful: Intel's ICC pre-defines
	1491	# the same defines as GCC's).
	1492	for i in \
[aed262]	1493	_BOOST_mingw_test(6, 2) \
	1494	_BOOST_gcc_test(6, 2) \
	1495	_BOOST_mingw_test(6, 1) \
	1496	_BOOST_gcc_test(6, 1) \
	1497	_BOOST_mingw_test(6, 0) \
	1498	_BOOST_gcc_test(6, 0) \
	1499	_BOOST_mingw_test(5, 3) \
	1500	_BOOST_gcc_test(5, 3) \
	1501	_BOOST_mingw_test(5, 2) \
	1502	_BOOST_gcc_test(5, 2) \
	1503	_BOOST_mingw_test(5, 1) \
	1504	_BOOST_gcc_test(5, 1) \
	1505	_BOOST_mingw_test(5, 0) \
	1506	_BOOST_gcc_test(5, 0) \
	1507	_BOOST_mingw_test(4, 10) \
	1508	_BOOST_gcc_test(4, 10) \
	1509	_BOOST_mingw_test(4, 9) \
	1510	_BOOST_gcc_test(4, 9) \
	1511	_BOOST_mingw_test(4, 8) \
[3b35e7]	1512	_BOOST_gcc_test(4, 8) \
[aed262]	1513	_BOOST_mingw_test(4, 7) \
[3b35e7]	1514	_BOOST_gcc_test(4, 7) \
[aed262]	1515	_BOOST_mingw_test(4, 6) \
[79de12]	1516	_BOOST_gcc_test(4, 6) \
[aed262]	1517	_BOOST_mingw_test(4, 5) \
[79de12]	1518	_BOOST_gcc_test(4, 5) \
[aed262]	1519	_BOOST_mingw_test(4, 4) \
[79de12]	1520	_BOOST_gcc_test(4, 4) \
[aed262]	1521	_BOOST_mingw_test(4, 3) \
[79de12]	1522	_BOOST_gcc_test(4, 3) \
[aed262]	1523	_BOOST_mingw_test(4, 2) \
[79de12]	1524	_BOOST_gcc_test(4, 2) \
[aed262]	1525	_BOOST_mingw_test(4, 1) \
[79de12]	1526	_BOOST_gcc_test(4, 1) \
[aed262]	1527	_BOOST_mingw_test(4, 0) \
[79de12]	1528	_BOOST_gcc_test(4, 0) \
	1529	"defined __GNUC__ && __GNUC__ == 3 && !defined __ICC \
	1530	&& (defined WIN32 \|\| defined WINNT \|\| defined _WIN32 \|\| defined __WIN32 \
	1531	\|\| defined __WIN32__ \|\| defined __WINNT \|\| defined __WINNT__) @ mgw" \
	1532	_BOOST_gcc_test(3, 4) \
	1533	_BOOST_gcc_test(3, 3) \
	1534	"defined _MSC_VER && _MSC_VER >= 1500 @ vc90" \
	1535	"defined _MSC_VER && _MSC_VER == 1400 @ vc80" \
	1536	_BOOST_gcc_test(3, 2) \
	1537	"defined _MSC_VER && _MSC_VER == 1310 @ vc71" \
	1538	_BOOST_gcc_test(3, 1) \
	1539	_BOOST_gcc_test(3, 0) \
	1540	"defined __BORLANDC__ @ bcb" \
	1541	"defined __ICC && (defined __unix \|\| defined __unix__) @ il" \
	1542	"defined __ICL @ iw" \
	1543	"defined _MSC_VER && _MSC_VER == 1300 @ vc7" \
	1544	_BOOST_gcc_test(2, 95) \
	1545	"defined __MWERKS__ && __MWERKS__ <= 0x32FF @ cw9" \
	1546	"defined _MSC_VER && _MSC_VER < 1300 && !defined UNDER_CE @ vc6" \
	1547	"defined _MSC_VER && _MSC_VER < 1300 && defined UNDER_CE @ evc4" \
	1548	"defined __MWERKS__ && __MWERKS__ <= 0x31FF @ cw8"
	1549	do
	1550	boost_tag_test=`expr "X$i" : 'X\([[^@]]*\) @ '`
	1551	boost_tag=`expr "X$i" : 'X[[^@]]* @ \(.*\)'`
	1552	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	1553	#if $boost_tag_test
	1554	/* OK */
	1555	#else
	1556	# error $boost_tag_test
	1557	#endif
	1558	]])], [boost_cv_lib_tag=$boost_tag; break], [])
	1559	done
	1560	AC_LANG_POP([C++])dnl
	1561	case $boost_cv_lib_tag in #(
	1562	# Some newer (>= 1.35?) versions of Boost seem to only use "gcc" as opposed
	1563	# to "gcc41" for instance.
	1564	-gcc \| '-gcc ') :;; #( Don't re-add -gcc: it's already in there.
	1565	gcc*)
	1566	boost_tag_x=
	1567	case $host_os in #(
	1568	darwin*)
	1569	if test $boost_major_version -ge 136; then
	1570	# The `x' added in r46793 of Boost.
	1571	boost_tag_x=x
	1572	fi;;
	1573	esac
	1574	# We can specify multiple tags in this variable because it's used by
	1575	# BOOST_FIND_LIB that does a `for tag in -$boost_cv_lib_tag' ...
	1576	boost_cv_lib_tag="$boost_tag_x$boost_cv_lib_tag -${boost_tag_x}gcc"
	1577	;; #(
	1578	unknown)
	1579	AC_MSG_WARN([[could not figure out which toolset name to use for $CXX]])
	1580	boost_cv_lib_tag=
	1581	;;
	1582	esac
	1583	fi])dnl end of AC_CACHE_CHECK
	1584	])# _BOOST_FIND_COMPILER_TAG
	1585
	1586
	1587	# _BOOST_GUESS_WHETHER_TO_USE_MT()
	1588	# --------------------------------
	1589	# Compile a small test to try to guess whether we should favor MT (Multi
	1590	# Thread) flavors of Boost. Sets boost_guess_use_mt accordingly.
	1591	AC_DEFUN([_BOOST_GUESS_WHETHER_TO_USE_MT],
	1592	[# Check whether we do better use `mt' even though we weren't ask to.
[3b35e7]	1593	AC_LANG_PUSH([C++])dnl
[79de12]	1594	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	1595	#if defined _REENTRANT \|\| defined _MT \|\| defined __MT__
	1596	/* use -mt */
	1597	#else
	1598	# error MT not needed
	1599	#endif
	1600	]])], [boost_guess_use_mt=:], [boost_guess_use_mt=false])
[3b35e7]	1601	AC_LANG_POP([C++])dnl
[79de12]	1602	])
	1603
	1604	# _BOOST_AC_LINK_IFELSE(PROGRAM, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
	1605	# -------------------------------------------------------------------
	1606	# Fork of _AC_LINK_IFELSE that preserves conftest.o across calls. Fragile,
	1607	# will break when Autoconf changes its internals. Requires that you manually
	1608	# rm -f conftest.$ac_objext in between to really different tests, otherwise
	1609	# you will try to link a conftest.o left behind by a previous test.
	1610	# Used to aggressively optimize BOOST_FIND_LIB (see the big comment in this
	1611	# macro).
	1612	#
	1613	# Don't use "break" in the actions, as it would short-circuit some code
	1614	# this macro runs after the actions.
	1615	m4_define([_BOOST_AC_LINK_IFELSE],
	1616	[m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
	1617	rm -f conftest$ac_exeext
	1618	boost_save_ac_ext=$ac_ext
	1619	boost_use_source=:
	1620	# If we already have a .o, re-use it. We change $ac_ext so that $ac_link
	1621	# tries to link the existing object file instead of compiling from source.
	1622	test -f conftest.$ac_objext && ac_ext=$ac_objext && boost_use_source=false &&
	1623	_AS_ECHO_LOG([re-using the existing conftest.$ac_objext])
	1624	AS_IF([_AC_DO_STDERR($ac_link) && {
[3b35e7]	1625	test -z "$ac_[]_AC_LANG_ABBREV[]_werror_flag" \|\|
	1626	test ! -s conftest.err
[79de12]	1627	} && test -s conftest$ac_exeext && {
[3b35e7]	1628	test "$cross_compiling" = yes \|\|
	1629	$as_executable_p conftest$ac_exeext
[79de12]	1630	dnl FIXME: use AS_TEST_X instead when 2.61 is widespread enough.
	1631	}],
	1632	[$2],
	1633	[if $boost_use_source; then
	1634	_AC_MSG_LOG_CONFTEST
	1635	fi
	1636	$3])
	1637	ac_objext=$boost_save_ac_objext
	1638	ac_ext=$boost_save_ac_ext
	1639	dnl Delete also the IPA/IPO (Inter Procedural Analysis/Optimization)
	1640	dnl information created by the PGI compiler (conftest_ipa8_conftest.oo),
	1641	dnl as it would interfere with the next link command.
	1642	rm -f core conftest.err conftest_ipa8_conftest.oo \
	1643	conftest$ac_exeext m4_ifval([$1], [conftest.$ac_ext])[]dnl
	1644	])# _BOOST_AC_LINK_IFELSE
	1645
	1646	# Local Variables:
	1647	# mode: autoconf
	1648	# End:

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