dnl @synopsis ACX_BLAS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) dnl dnl This macro looks for a library that implements the BLAS dnl linear-algebra interface (see http://www.netlib.org/blas/). dnl On success, it sets the BLAS_LIBS output variable to dnl hold the requisite library linkages. dnl dnl To link with BLAS, you should link with: dnl dnl $BLAS_LIBS $LIBS $FLIBS dnl dnl in that order. 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 Many libraries are searched for, from ATLAS to CXML to ESSL. dnl The user may also use --with-blas= in order to use some dnl specific BLAS library . 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 BLAS library. dnl dnl ACTION-IF-FOUND is a list of shell commands to run if a BLAS 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_BLAS. dnl dnl This macro requires autoconf 2.50 or later. dnl dnl @version $Id: acx_blas.m4,v 1.1.1.1 2005/09/15 06:45:07 nils Exp $ dnl @author Steven G. Johnson dnl AC_DEFUN([ACX_BLAS], [ AC_PREREQ(2.50) AC_REQUIRE([AC_F77_LIBRARY_LDFLAGS]) acx_blas_ok=no AC_ARG_WITH(blas, [AC_HELP_STRING([--with-blas=], [use BLAS library ])]) case $with_blas in yes | "") ;; no) acx_blas_ok=disable ;; -* | */* | *.a | *.so | *.so.* | *.o) BLAS_LIBS="$with_blas" ;; *) BLAS_LIBS="-l$with_blas" ;; esac # Get fortran linker names of BLAS functions to check for. AC_F77_FUNC(sgemm) AC_F77_FUNC(dgemm) acx_blas_save_LIBS="$LIBS" LIBS="$LIBS $FLIBS" # First, check BLAS_LIBS environment variable if test $acx_blas_ok = no; then if test "x$BLAS_LIBS" != x; then save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS" AC_MSG_CHECKING([for $sgemm in $BLAS_LIBS]) AC_TRY_LINK_FUNC($sgemm, [acx_blas_ok=yes], [BLAS_LIBS=""]) AC_MSG_RESULT($acx_blas_ok) LIBS="$save_LIBS" fi fi # BLAS linked to by default? (happens on some supercomputers) if test $acx_blas_ok = no; then save_LIBS="$LIBS"; LIBS="$LIBS" AC_CHECK_FUNC($sgemm, [acx_blas_ok=yes]) LIBS="$save_LIBS" fi # BLAS in ATLAS library? (http://math-atlas.sourceforge.net/) if test $acx_blas_ok = no; then AC_CHECK_LIB(atlas, ATL_xerbla, [AC_CHECK_LIB(f77blas, $sgemm, [AC_CHECK_LIB(cblas, cblas_dgemm, [acx_blas_ok=yes BLAS_LIBS="-lcblas -lf77blas -latlas"], [], [-lf77blas -latlas])], [], [-latlas])]) fi # BLAS in Apple vecLib framework? (Mac OS X) if test $acx_blas_ok = no; then vlib_flags="-framework vecLib" save_LIBS="$LIBS"; LIBS="$vlib_flags $LIBS" AC_MSG_CHECKING([for $sgemm in $vlib_flags]) AC_TRY_LINK_FUNC($sgemm, [acx_blas_ok=yes; BLAS_LIBS="$vlib_flags"], [BLAS_LIBS=""]) AC_MSG_RESULT($acx_blas_ok) LIBS="$save_LIBS" fi # BLAS in PhiPACK libraries? (requires generic BLAS lib, too) if test $acx_blas_ok = no; then AC_CHECK_LIB(blas, $sgemm, [AC_CHECK_LIB(dgemm, $dgemm, [AC_CHECK_LIB(sgemm, $sgemm, [acx_blas_ok=yes; BLAS_LIBS="-lsgemm -ldgemm -lblas"], [], [-lblas])], [], [-lblas])]) fi # BLAS in Alpha CXML library? if test $acx_blas_ok = no; then AC_CHECK_LIB(cxml, $sgemm, [acx_blas_ok=yes;BLAS_LIBS="-lcxml"]) fi # BLAS in Alpha DXML library? (now called CXML, see above) if test $acx_blas_ok = no; then AC_CHECK_LIB(dxml, $sgemm, [acx_blas_ok=yes;BLAS_LIBS="-ldxml"]) fi # BLAS in Sun Performance library? if test $acx_blas_ok = no; then if test "x$GCC" != xyes; then # only works with Sun CC AC_CHECK_LIB(sunmath, acosp, [AC_CHECK_LIB(sunperf, $sgemm, [BLAS_LIBS="-xlic_lib=sunperf -lsunmath" acx_blas_ok=yes],[],[-lsunmath])]) fi fi # BLAS in SCSL library? (SGI/Cray Scientific Library) if test $acx_blas_ok = no; then AC_CHECK_LIB(scs, $sgemm, [acx_blas_ok=yes; BLAS_LIBS="-lscs"]) fi # BLAS in SGIMATH library? if test $acx_blas_ok = no; then AC_CHECK_LIB(complib.sgimath, $sgemm, [acx_blas_ok=yes; BLAS_LIBS="-lcomplib.sgimath"]) fi # BLAS in IBM ESSL library? (requires generic BLAS lib, too) if test $acx_blas_ok = no; then AC_CHECK_LIB(blas, $sgemm, [AC_CHECK_LIB(essl, $sgemm, [acx_blas_ok=yes; BLAS_LIBS="-lessl -lblas"], [], [-lblas $FLIBS])]) fi # Generic BLAS library? if test $acx_blas_ok = no; then AC_CHECK_LIB(blas, $sgemm, [acx_blas_ok=yes; BLAS_LIBS="-lblas"]) fi AC_SUBST(BLAS_LIBS) LIBS="$acx_blas_save_LIBS" # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: if test x"$acx_blas_ok" = xyes; then ifelse([$1],,AC_DEFINE(HAVE_BLAS,1,[Define if you have a BLAS library.]),[$1]) : else acx_blas_ok=no $2 fi ])dnl ACX_BLAS