mirror of https://gitlab.com/scemama/qmcchem.git
136 lines
5.1 KiB
Plaintext
136 lines
5.1 KiB
Plaintext
# ===========================================================================
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# https://www.gnu.org/software/autoconf-archive/ax_lapack.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_LAPACK([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
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#
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# DESCRIPTION
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#
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# This macro looks for a library that implements the LAPACK linear-algebra
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# interface (see http://www.netlib.org/lapack/). On success, it sets the
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# LAPACK_LIBS output variable to hold the requisite library linkages.
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#
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# To link with LAPACK, you should link with:
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#
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# $LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS
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#
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# in that order. BLAS_LIBS is the output variable of the AX_BLAS macro,
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# called automatically. FLIBS is the output variable of the
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# AC_F77_LIBRARY_LDFLAGS macro (called if necessary by AX_BLAS), and is
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# sometimes necessary in order to link with F77 libraries. Users will also
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# need to use AC_F77_DUMMY_MAIN (see the autoconf manual), for the same
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# reason.
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#
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# The user may also use --with-lapack=<lib> in order to use some specific
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# LAPACK library <lib>. In order to link successfully, however, be aware
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# that you will probably need to use the same Fortran compiler (which can
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# be set via the F77 env. var.) as was used to compile the LAPACK and BLAS
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# libraries.
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#
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# ACTION-IF-FOUND is a list of shell commands to run if a LAPACK library
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# is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
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# is not found. If ACTION-IF-FOUND is not specified, the default action
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# will define HAVE_LAPACK.
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#
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# LICENSE
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#
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# Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu>
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# Copyright (c) 2019 Geoffrey M. Oxberry <goxberry@gmail.com>
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation, either version 3 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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# As a special exception, the respective Autoconf Macro's copyright owner
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# gives unlimited permission to copy, distribute and modify the configure
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# scripts that are the output of Autoconf when processing the Macro. You
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# need not follow the terms of the GNU General Public License when using
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# or distributing such scripts, even though portions of the text of the
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# Macro appear in them. The GNU General Public License (GPL) does govern
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# all other use of the material that constitutes the Autoconf Macro.
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#
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# This special exception to the GPL applies to versions of the Autoconf
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# Macro released by the Autoconf Archive. When you make and distribute a
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# modified version of the Autoconf Macro, you may extend this special
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# exception to the GPL to apply to your modified version as well.
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#serial 10
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AU_ALIAS([ACX_LAPACK], [AX_LAPACK])
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AC_DEFUN([AX_LAPACK], [
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AC_REQUIRE([AX_BLAS])
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ax_lapack_ok=no
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AC_ARG_WITH(lapack,
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[AS_HELP_STRING([--with-lapack=<lib>], [use LAPACK library <lib>])])
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case $with_lapack in
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yes | "") ;;
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no) ax_lapack_ok=disable ;;
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-* | */* | *.a | *.so | *.so.* | *.dylib | *.dylib.* | *.o)
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LAPACK_LIBS="$with_lapack"
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;;
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*) LAPACK_LIBS="-l$with_lapack" ;;
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esac
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# Get fortran linker name of LAPACK function to check for.
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AC_F77_FUNC(cheev)
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# We cannot use LAPACK if BLAS is not found
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if test "x$ax_blas_ok" != xyes; then
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ax_lapack_ok=noblas
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LAPACK_LIBS=""
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fi
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# First, check LAPACK_LIBS environment variable
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if test "x$LAPACK_LIBS" != x; then
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save_LIBS="$LIBS"; LIBS="$LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS"
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AC_MSG_CHECKING([for $cheev in $LAPACK_LIBS])
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AC_LINK_IFELSE([AC_LANG_CALL([], [$cheev])], [ax_lapack_ok=yes], [LAPACK_LIBS=""])
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AC_MSG_RESULT($ax_lapack_ok)
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LIBS="$save_LIBS"
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if test $ax_lapack_ok = no; then
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LAPACK_LIBS=""
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fi
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fi
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# LAPACK linked to by default? (is sometimes included in BLAS lib)
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if test $ax_lapack_ok = no; then
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save_LIBS="$LIBS"; LIBS="$LIBS $BLAS_LIBS $FLIBS"
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AC_CHECK_FUNC($cheev, [ax_lapack_ok=yes])
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LIBS="$save_LIBS"
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fi
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# Generic LAPACK library?
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for lapack in lapack lapack_rs6k; do
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if test $ax_lapack_ok = no; then
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save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
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AC_CHECK_LIB($lapack, $cheev,
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[ax_lapack_ok=yes; LAPACK_LIBS="-l$lapack"], [], [$FLIBS])
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LIBS="$save_LIBS"
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fi
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done
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AC_SUBST(LAPACK_LIBS)
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# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
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if test x"$ax_lapack_ok" = xyes; then
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ifelse([$1],,AC_DEFINE(HAVE_LAPACK,1,[Define if you have LAPACK library.]),[$1])
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:
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else
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ax_lapack_ok=no
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$2
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fi
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])dnl AX_LAPACK
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