c8a52177bf
Only probe for libraries on system if no library is specified. If there is an error with the library that is specified as an argument, then raise an error instead of continuing to look for other libraries with a simple warning buried deep in the configuration log.
210 lines
6.9 KiB
Plaintext
210 lines
6.9 KiB
Plaintext
# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_blas.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_BLAS([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 BLAS linear-algebra
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# interface (see http://www.netlib.org/blas/). On success, it sets the
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# BLAS_LIBS output variable to hold the requisite library linkages.
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#
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# To link with BLAS, you should link with:
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#
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# $BLAS_LIBS $LIBS $FLIBS
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#
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# in that order. 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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# Many libraries are searched for, from ATLAS to CXML to ESSL. The user
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# may also use --with-blas=<lib> in order to use some specific BLAS
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# library <lib>. In order to link successfully, however, be aware that you
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# will probably need to use the same Fortran compiler (which can be set
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# via the F77 env. var.) as was used to compile the BLAS library.
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#
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# ACTION-IF-FOUND is a list of shell commands to run if a BLAS library is
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# found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it is
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# not found. If ACTION-IF-FOUND is not specified, the default action will
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# define HAVE_BLAS.
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#
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# LICENSE
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#
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# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
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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 <http://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 11
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AU_ALIAS([ACX_BLAS], [AX_BLAS])
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AC_DEFUN([AX_BLAS], [
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AC_PREREQ(2.50)
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AC_REQUIRE([AC_F77_LIBRARY_LDFLAGS])
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ax_blas_ok=no
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AC_ARG_WITH(blas,
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[AS_HELP_STRING([--with-blas=<lib>], [use BLAS library <lib>])])
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case $with_blas in
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yes | "") ;;
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no) ax_blas_ok=disable ;;
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-* | */* | *.a | *.so | *.so.* | *.o) BLAS_LIBS="$with_blas" ;;
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*) BLAS_LIBS="-l$with_blas" ;;
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esac
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# Get fortran linker names of BLAS functions to check for.
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AC_F77_FUNC(sgemm)
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AC_F77_FUNC(dgemm)
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ax_blas_save_LIBS="$LIBS"
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LIBS="$LIBS $FLIBS"
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# First, check BLAS_LIBS environment variable
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if test $ax_blas_ok = no; then
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if test "x$BLAS_LIBS" != x; then
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save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
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AC_MSG_CHECKING([for $sgemm in $BLAS_LIBS])
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AC_TRY_LINK_FUNC($sgemm, [ax_blas_ok=yes], [BLAS_LIBS=""])
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AC_MSG_RESULT($ax_blas_ok)
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LIBS="$save_LIBS"
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fi
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fi
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# don't probe if explicitly defined; by bailing out here if the
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# argument is set, we guard against typo, incompatible libs. etc.
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# being inadvertedly overrided by another (random) implementation
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if test "x$with_blas" == x; then
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# BLAS linked to by default? (happens on some supercomputers)
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if test $ax_blas_ok = no; then
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save_LIBS="$LIBS"; LIBS="$LIBS"
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AC_MSG_CHECKING([if $sgemm is being linked in already])
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AC_TRY_LINK_FUNC($sgemm, [ax_blas_ok=yes])
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AC_MSG_RESULT($ax_blas_ok)
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LIBS="$save_LIBS"
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fi
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# BLAS in ATLAS library? (http://math-atlas.sourceforge.net/)
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if test $ax_blas_ok = no; then
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AC_CHECK_LIB(atlas, ATL_xerbla,
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[AC_CHECK_LIB(f77blas, $sgemm,
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[AC_CHECK_LIB(cblas, cblas_dgemm,
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[ax_blas_ok=yes
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BLAS_LIBS="-lcblas -lf77blas -latlas"],
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[], [-lf77blas -latlas])],
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[], [-latlas])])
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fi
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# BLAS in PhiPACK libraries? (requires generic BLAS lib, too)
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if test $ax_blas_ok = no; then
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AC_CHECK_LIB(blas, $sgemm,
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[AC_CHECK_LIB(dgemm, $dgemm,
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[AC_CHECK_LIB(sgemm, $sgemm,
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[ax_blas_ok=yes; BLAS_LIBS="-lsgemm -ldgemm -lblas"],
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[], [-lblas])],
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[], [-lblas])])
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fi
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# BLAS in Intel MKL library?
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if test $ax_blas_ok = no; then
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AC_CHECK_LIB(mkl, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lmkl"])
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fi
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# BLAS in Apple vecLib library?
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if test $ax_blas_ok = no; then
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save_LIBS="$LIBS"; LIBS="-framework vecLib $LIBS"
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AC_MSG_CHECKING([for $sgemm in -framework vecLib])
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AC_TRY_LINK_FUNC($sgemm, [ax_blas_ok=yes;BLAS_LIBS="-framework vecLib"])
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AC_MSG_RESULT($ax_blas_ok)
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LIBS="$save_LIBS"
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fi
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# BLAS in Alpha CXML library?
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if test $ax_blas_ok = no; then
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AC_CHECK_LIB(cxml, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lcxml"])
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fi
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# BLAS in Alpha DXML library? (now called CXML, see above)
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if test $ax_blas_ok = no; then
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AC_CHECK_LIB(dxml, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-ldxml"])
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fi
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# BLAS in Sun Performance library?
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if test $ax_blas_ok = no; then
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if test "x$GCC" != xyes; then # only works with Sun CC
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AC_CHECK_LIB(sunmath, acosp,
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[AC_CHECK_LIB(sunperf, $sgemm,
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[BLAS_LIBS="-xlic_lib=sunperf -lsunmath"
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ax_blas_ok=yes],[],[-lsunmath])])
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fi
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fi
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# BLAS in SCSL library? (SGI/Cray Scientific Library)
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if test $ax_blas_ok = no; then
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AC_CHECK_LIB(scs, $sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lscs"])
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fi
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# BLAS in SGIMATH library?
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if test $ax_blas_ok = no; then
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AC_CHECK_LIB(complib.sgimath, $sgemm,
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[ax_blas_ok=yes; BLAS_LIBS="-lcomplib.sgimath"])
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fi
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# BLAS in IBM ESSL library? (requires generic BLAS lib, too)
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if test $ax_blas_ok = no; then
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AC_CHECK_LIB(blas, $sgemm,
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[AC_CHECK_LIB(essl, $sgemm,
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[ax_blas_ok=yes; BLAS_LIBS="-lessl -lblas"],
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[], [-lblas $FLIBS])])
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fi
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# Generic BLAS library?
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if test $ax_blas_ok = no; then
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AC_CHECK_LIB(blas, $sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lblas"])
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fi
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# end of guard against automatic overriding explicit definitions
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fi
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AC_SUBST(BLAS_LIBS)
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LIBS="$ax_blas_save_LIBS"
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# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
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if test x"$ax_blas_ok" = xyes; then
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ifelse([$1],,AC_DEFINE(HAVE_BLAS,1,[Define if you have a BLAS library.]),[$1])
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:
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else
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ax_blas_ok=no
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$2
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fi
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])dnl AX_BLAS
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