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96 lines
3.3 KiB
Plaintext
96 lines
3.3 KiB
Plaintext
dnl @synopsis ACX_LAPACK([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
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dnl
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dnl This macro looks for a library that implements the LAPACK
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dnl linear-algebra interface (see http://www.netlib.org/lapack/). On
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dnl success, it sets the LAPACK_LIBS output variable to hold the
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dnl requisite library linkages.
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dnl
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dnl To link with LAPACK, you should link with:
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dnl
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dnl $LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS
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dnl
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dnl in that order. BLAS_LIBS is the output variable of the ACX_BLAS
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dnl macro, called automatically. FLIBS is the output variable of the
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dnl AC_F77_LIBRARY_LDFLAGS macro (called if necessary by ACX_BLAS), and
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dnl is sometimes necessary in order to link with F77 libraries. Users
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dnl will also need to use AC_F77_DUMMY_MAIN (see the autoconf manual),
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dnl for the same reason.
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dnl
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dnl The user may also use --with-lapack=<lib> in order to use some
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dnl specific LAPACK library <lib>. In order to link successfully,
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dnl however, be aware that you will probably need to use the same
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dnl Fortran compiler (which can be set via the F77 env. var.) as was
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dnl used to compile the LAPACK and BLAS libraries.
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dnl
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dnl ACTION-IF-FOUND is a list of shell commands to run if a LAPACK
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dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to
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dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the
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dnl default action will define HAVE_LAPACK.
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dnl
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dnl @category InstalledPackages
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dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
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dnl @version 2002-03-12
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dnl @license GPLWithACException
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AC_DEFUN([ACX_LAPACK], [
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AC_REQUIRE([ACX_BLAS])
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acx_lapack_ok=no
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AC_ARG_WITH(lapack,
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[AC_HELP_STRING([--with-lapack=<lib>], [use LAPACK library <lib>])])
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case $with_lapack in
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yes | "") ;;
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no) acx_lapack_ok=disable ;;
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-* | */* | *.a | *.so | *.so.* | *.o) LAPACK_LIBS="$with_lapack" ;;
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*) LAPACK_LIBS="-l$with_lapack" ;;
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esac
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# Get fortran linker name of LAPACK function to check for.
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AC_F77_FUNC(cheev)
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# We cannot use LAPACK if BLAS is not found
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if test "x$acx_blas_ok" != xyes; then
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acx_lapack_ok=noblas
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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 $LAPACK_LIBS])
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AC_TRY_LINK_FUNC($cheev, [acx_lapack_ok=yes], [LAPACK_LIBS=""])
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AC_MSG_RESULT($acx_lapack_ok)
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LIBS="$save_LIBS"
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if test acx_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 $acx_lapack_ok = no; then
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save_LIBS="$LIBS"; LIBS="$LIBS $BLAS_LIBS $FLIBS"
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AC_CHECK_FUNC($cheev, [acx_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 $acx_lapack_ok = no; then
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save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
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AC_CHECK_LIB($lapack, $cheev,
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[acx_lapack_ok=yes; LAPACK_LIBS="-l$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"$acx_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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acx_lapack_ok=no
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$2
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fi
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])dnl ACX_LAPACK
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