[f06d52] | 1 | # ===========================================================================
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| 2 | # http://www.gnu.org/software/autoconf-archive/ax_lapack.html
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| 3 | # ===========================================================================
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| 4 | #
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| 5 | # SYNOPSIS
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| 6 | #
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| 7 | # AX_LAPACK([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
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| 8 | #
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| 9 | # DESCRIPTION
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| 10 | #
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| 11 | # This macro looks for a library that implements the LAPACK linear-algebra
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| 12 | # interface (see http://www.netlib.org/lapack/). On success, it sets the
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| 13 | # LAPACK_LIBS output variable to hold the requisite library linkages.
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| 14 | #
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| 15 | # To link with LAPACK, you should link with:
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| 16 | #
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| 17 | # $LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS
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| 18 | #
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| 19 | # in that order. BLAS_LIBS is the output variable of the AX_BLAS macro,
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| 20 | # called automatically. FLIBS is the output variable of the
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| 21 | # AC_F77_LIBRARY_LDFLAGS macro (called if necessary by AX_BLAS), and is
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| 22 | # sometimes necessary in order to link with F77 libraries. Users will also
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| 23 | # need to use AC_F77_DUMMY_MAIN (see the autoconf manual), for the same
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| 24 | # reason.
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| 25 | #
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| 26 | # The user may also use --with-lapack=<lib> in order to use some specific
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| 27 | # LAPACK library <lib>. In order to link successfully, however, be aware
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| 28 | # that you will probably need to use the same Fortran compiler (which can
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| 29 | # be set via the F77 env. var.) as was used to compile the LAPACK and BLAS
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| 30 | # libraries.
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| 31 | #
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| 32 | # ACTION-IF-FOUND is a list of shell commands to run if a LAPACK library
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| 33 | # is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
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| 34 | # is not found. If ACTION-IF-FOUND is not specified, the default action
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| 35 | # will define HAVE_LAPACK.
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| 36 | #
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| 37 | # LICENSE
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| 38 | #
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| 39 | # Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu>
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| 40 | #
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| 41 | # This program is free software: you can redistribute it and/or modify it
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| 42 | # under the terms of the GNU General Public License as published by the
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| 43 | # Free Software Foundation, either version 3 of the License, or (at your
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| 44 | # option) any later version.
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| 45 | #
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| 46 | # This program is distributed in the hope that it will be useful, but
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| 47 | # WITHOUT ANY WARRANTY; without even the implied warranty of
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| 48 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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| 49 | # Public License for more details.
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| 50 | #
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| 51 | # You should have received a copy of the GNU General Public License along
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| 52 | # with this program. If not, see <http://www.gnu.org/licenses/>.
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| 53 | #
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| 54 | # As a special exception, the respective Autoconf Macro's copyright owner
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| 55 | # gives unlimited permission to copy, distribute and modify the configure
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| 56 | # scripts that are the output of Autoconf when processing the Macro. You
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| 57 | # need not follow the terms of the GNU General Public License when using
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| 58 | # or distributing such scripts, even though portions of the text of the
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| 59 | # Macro appear in them. The GNU General Public License (GPL) does govern
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| 60 | # all other use of the material that constitutes the Autoconf Macro.
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| 61 | #
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| 62 | # This special exception to the GPL applies to versions of the Autoconf
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| 63 | # Macro released by the Autoconf Archive. When you make and distribute a
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| 64 | # modified version of the Autoconf Macro, you may extend this special
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| 65 | # exception to the GPL to apply to your modified version as well.
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| 66 |
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| 67 | #serial 7
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| 68 |
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| 69 | AU_ALIAS([ACX_LAPACK], [AX_LAPACK])
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| 70 | AC_DEFUN([AX_LAPACK], [
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| 71 | AC_REQUIRE([AX_BLAS])
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| 72 | ax_lapack_ok=no
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| 73 |
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| 74 | AC_ARG_WITH(lapack,
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| 75 | [AS_HELP_STRING([--with-lapack=<lib>], [use LAPACK library <lib>])])
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| 76 | case $with_lapack in
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| 77 | yes | "") ;;
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| 78 | no) ax_lapack_ok=disable ;;
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| 79 | -* | */* | *.a | *.so | *.so.* | *.o) LAPACK_LIBS="$with_lapack" ;;
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| 80 | *) LAPACK_LIBS="-l$with_lapack" ;;
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| 81 | esac
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| 82 |
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| 83 | # Get fortran linker name of LAPACK function to check for.
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| 84 | AC_F77_FUNC(cheev)
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| 85 |
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| 86 | # We cannot use LAPACK if BLAS is not found
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| 87 | if test "x$ax_blas_ok" != xyes; then
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| 88 | ax_lapack_ok=noblas
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| 89 | LAPACK_LIBS=""
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| 90 | fi
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| 91 |
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| 92 | # First, check LAPACK_LIBS environment variable
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| 93 | if test "x$LAPACK_LIBS" != x; then
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| 94 | save_LIBS="$LIBS"; LIBS="$LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS"
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| 95 | AC_MSG_CHECKING([for $cheev in $LAPACK_LIBS])
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| 96 | AC_TRY_LINK_FUNC($cheev, [ax_lapack_ok=yes], [LAPACK_LIBS=""])
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| 97 | AC_MSG_RESULT($ax_lapack_ok)
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| 98 | LIBS="$save_LIBS"
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| 99 | if test $ax_lapack_ok = no; then
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| 100 | LAPACK_LIBS=""
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| 101 | fi
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| 102 | fi
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| 103 |
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| 104 | # LAPACK linked to by default? (is sometimes included in BLAS lib)
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| 105 | if test $ax_lapack_ok = no; then
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| 106 | save_LIBS="$LIBS"; LIBS="$LIBS $BLAS_LIBS $FLIBS"
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| 107 | AC_CHECK_FUNC($cheev, [ax_lapack_ok=yes])
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| 108 | LIBS="$save_LIBS"
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| 109 | fi
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| 110 |
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| 111 | # Generic LAPACK library?
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| 112 | for lapack in lapack lapack_rs6k; do
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| 113 | if test $ax_lapack_ok = no; then
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| 114 | save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
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| 115 | AC_CHECK_LIB($lapack, $cheev,
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| 116 | [ax_lapack_ok=yes; LAPACK_LIBS="-l$lapack"], [], [$FLIBS])
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| 117 | LIBS="$save_LIBS"
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| 118 | fi
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| 119 | done
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| 120 |
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| 121 | AC_SUBST(LAPACK_LIBS)
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| 122 |
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| 123 | # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
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| 124 | if test x"$ax_lapack_ok" = xyes; then
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| 125 | ifelse([$1],,AC_DEFINE(HAVE_LAPACK,1,[Define if you have LAPACK library.]),[$1])
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| 126 | :
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| 127 | else
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| 128 | ax_lapack_ok=no
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| 129 | $2
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| 130 | fi
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| 131 | ])dnl AX_LAPACK
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