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author | John W. Eaton <jwe@octave.org> |
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date | Mon, 04 Aug 2008 22:15:34 -0400 |
parents | 323be5eeed1f |
children | fd13f9f7dbac |
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dnl @synopsis ACX_LAPACK([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) dnl dnl This macro looks for a library that implements the LAPACK dnl linear-algebra interface (see http://www.netlib.org/lapack/). dnl On success, it sets the LAPACK_LIBS output variable to dnl hold the requisite library linkages. dnl dnl To link with LAPACK, you should link with: dnl dnl $LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS dnl dnl in that order. BLAS_LIBS is the output variable of the ACX_BLAS dnl macro, called automatically. FLIBS is the output variable of the dnl AC_F77_LIBRARY_LDFLAGS macro (called if necessary by ACX_BLAS), dnl and is sometimes necessary in order to link with F77 libraries. dnl Users will also need to use AC_F77_DUMMY_MAIN (see the autoconf dnl manual), for the same reason. dnl dnl The user may also use --with-lapack=<lib> in order to use some dnl specific LAPACK library <lib>. In order to link successfully, dnl however, be aware that you will probably need to use the same dnl Fortran compiler (which can be set via the F77 env. var.) as dnl was used to compile the LAPACK and BLAS libraries. dnl dnl ACTION-IF-FOUND is a list of shell commands to run if a LAPACK dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands dnl to run it if it is not found. If ACTION-IF-FOUND is not specified, dnl the default action will define HAVE_LAPACK. dnl dnl @version $Id: acx_lapack.m4,v 1.3 2002/03/12 09:12:44 simons Exp $ dnl @author Steven G. Johnson <stevenj@alum.mit.edu> AC_DEFUN([ACX_LAPACK], [ AC_REQUIRE([ACX_BLAS]) acx_lapack_ok=no AC_ARG_WITH(lapack, [AS_HELP_STRING([--with-lapack=<lib>], [use LAPACK library <lib>])]) case $with_lapack in yes | "") ;; no) acx_lapack_ok=disable ;; -* | */* | *.a | *.so | *.so.* | *.o) LAPACK_LIBS="$with_lapack" ;; *) LAPACK_LIBS="-l$with_lapack" ;; esac # Get fortran linker name of LAPACK function to check for. if $have_fortran_compiler; then AC_F77_FUNC(cheev) elif $have_f2c; then cheev=cheev_ fi # We cannot use LAPACK if BLAS is not found if test "x$acx_blas_ok" != xyes; then acx_lapack_ok=noblas fi # First, check LAPACK_LIBS environment variable if test "x$LAPACK_LIBS" != x; then save_LIBS="$LIBS"; LIBS="$LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS" AC_MSG_CHECKING([for $cheev in $LAPACK_LIBS]) AC_LINK_IFELSE([AC_LANG_CALL([], [$cheev])], [acx_lapack_ok=yes], [LAPACK_LIBS=""]) AC_MSG_RESULT($acx_lapack_ok) LIBS="$save_LIBS" if test acx_lapack_ok = no; then LAPACK_LIBS="" fi fi # LAPACK linked to by default? (is sometimes included in BLAS lib) if test $acx_lapack_ok = no; then save_LIBS="$LIBS"; LIBS="$LIBS $BLAS_LIBS $FLIBS" AC_CHECK_FUNC($cheev, [acx_lapack_ok=yes]) LIBS="$save_LIBS" fi # Generic LAPACK library? for lapack in lapack lapack_rs6k; do if test $acx_lapack_ok = no; then save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS" AC_CHECK_LIB($lapack, $cheev, [acx_lapack_ok=yes; LAPACK_LIBS="-l$lapack"], [], [$FLIBS]) LIBS="$save_LIBS" fi done AC_SUBST(LAPACK_LIBS) # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: if test x"$acx_lapack_ok" = xyes; then ifelse([$1],,AC_DEFINE(HAVE_LAPACK,1,[Define if you have LAPACK library.]),[$1]) : else acx_lapack_ok=no $2 fi ])dnl ACX_LAPACK