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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_blas.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_BLAS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
#
# DESCRIPTION
#
# This macro looks for a library that implements the BLAS linear-algebra
# interface (see http://www.netlib.org/blas/). On success, it sets the
# BLAS_LIBS output variable to hold the requisite library linkages.
#
# To link with BLAS, you should link with:
#
# $BLAS_LIBS $LIBS $FLIBS
#
# in that order. FLIBS is the output variable of the
# AC_F77_LIBRARY_LDFLAGS macro (called if necessary by AX_BLAS), and is
# sometimes necessary in order to link with F77 libraries. Users will also
# need to use AC_F77_DUMMY_MAIN (see the autoconf manual), for the same
# reason.
#
# Many libraries are searched for, from ATLAS to CXML to ESSL. The user
# may also use --with-blas=<lib> in order to use some specific BLAS
# library <lib>. In order to link successfully, however, be aware that you
# will probably need to use the same Fortran compiler (which can be set
# via the F77 env. var.) as was used to compile the BLAS library.
#
# ACTION-IF-FOUND is a list of shell commands to run if a BLAS library is
# found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it is
# not found. If ACTION-IF-FOUND is not specified, the default action will
# define HAVE_BLAS.
#
# LICENSE
#
# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
# Copyright (c) 2019 Geoffrey M. Oxberry <goxberry@gmail.com>
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <https://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Archive. When you make and distribute a
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 19
AU_ALIAS([ACX_BLAS], [AX_BLAS])
AC_DEFUN([AX_BLAS], [
AC_PREREQ([2.55])
AC_REQUIRE([AC_F77_LIBRARY_LDFLAGS])
AC_REQUIRE([AC_CANONICAL_HOST])
ax_blas_ok=no
AC_ARG_WITH(blas,
[AS_HELP_STRING([--with-blas=<lib>], [use BLAS library <lib>])])
case $with_blas in
yes | "") ;;
no) ax_blas_ok=disable ;;
-* | */* | *.a | *.so | *.so.* | *.dylib | *.dylib.* | *.o)
BLAS_LIBS="$with_blas"
;;
*) BLAS_LIBS="-l$with_blas" ;;
esac
# Get fortran linker names of BLAS functions to check for.
AC_F77_FUNC(sgemm)
AC_F77_FUNC(dgemm)
ax_blas_save_LIBS="$LIBS"
LIBS="$LIBS $FLIBS"
# First, check BLAS_LIBS environment variable
if test $ax_blas_ok = no; then
if test "x$BLAS_LIBS" != x; then
save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
AC_MSG_CHECKING([for $sgemm in $BLAS_LIBS])
AC_LINK_IFELSE([AC_LANG_CALL([], [$sgemm])], [ax_blas_ok=yes], [BLAS_LIBS=""])
AC_MSG_RESULT($ax_blas_ok)
LIBS="$save_LIBS"
fi
fi
# BLAS linked to by default? (happens on some supercomputers)
if test $ax_blas_ok = no; then
save_LIBS="$LIBS"; LIBS="$LIBS"
AC_MSG_CHECKING([if $sgemm is being linked in already])
AC_LINK_IFELSE([AC_LANG_CALL([], [$sgemm])], [ax_blas_ok=yes])
AC_MSG_RESULT($ax_blas_ok)
LIBS="$save_LIBS"
fi
# BLAS in OpenBLAS library? (http://xianyi.github.com/OpenBLAS/)
if test $ax_blas_ok = no; then
AC_CHECK_LIB(openblas, $sgemm, [ax_blas_ok=yes
BLAS_LIBS="-lopenblas"])
fi
# BLAS in ATLAS library? (http://math-atlas.sourceforge.net/)
if test $ax_blas_ok = no; then
AC_CHECK_LIB(atlas, ATL_xerbla,
[AC_CHECK_LIB(f77blas, $sgemm,
[AC_CHECK_LIB(cblas, cblas_dgemm,
[ax_blas_ok=yes
BLAS_LIBS="-lcblas -lf77blas -latlas"],
[], [-lf77blas -latlas])],
[], [-latlas])])
fi
# BLAS in PhiPACK libraries? (requires generic BLAS lib, too)
if test $ax_blas_ok = no; then
AC_CHECK_LIB(blas, $sgemm,
[AC_CHECK_LIB(dgemm, $dgemm,
[AC_CHECK_LIB(sgemm, $sgemm,
[ax_blas_ok=yes; BLAS_LIBS="-lsgemm -ldgemm -lblas"],
[], [-lblas])],
[], [-lblas])])
fi
# BLAS in Intel MKL library?
if test $ax_blas_ok = no; then
# MKL for gfortran
if test x"$ac_cv_fc_compiler_gnu" = xyes; then
# 64 bit
if test $host_cpu = x86_64; then
AC_CHECK_LIB(mkl_gf_lp64, $sgemm,
[ax_blas_ok=yes;BLAS_LIBS="-lmkl_gf_lp64 -lmkl_sequential -lmkl_core -lpthread"],,
[-lmkl_gf_lp64 -lmkl_sequential -lmkl_core -lpthread])
# 32 bit
elif test $host_cpu = i686; then
AC_CHECK_LIB(mkl_gf, $sgemm,
[ax_blas_ok=yes;BLAS_LIBS="-lmkl_gf -lmkl_sequential -lmkl_core -lpthread"],,
[-lmkl_gf -lmkl_sequential -lmkl_core -lpthread])
fi
# MKL for other compilers (Intel, PGI, ...?)
else
# 64-bit
if test $host_cpu = x86_64; then
AC_CHECK_LIB(mkl_intel_lp64, $sgemm,
[ax_blas_ok=yes;BLAS_LIBS="-lmkl_intel_lp64 -lmkl_sequential -lmkl_core -lpthread"],,
[-lmkl_intel_lp64 -lmkl_sequential -lmkl_core -lpthread])
# 32-bit
elif test $host_cpu = i686; then
AC_CHECK_LIB(mkl_intel, $sgemm,
[ax_blas_ok=yes;BLAS_LIBS="-lmkl_intel -lmkl_sequential -lmkl_core -lpthread"],,
[-lmkl_intel -lmkl_sequential -lmkl_core -lpthread])
fi
fi
fi
# Old versions of MKL
if test $ax_blas_ok = no; then
AC_CHECK_LIB(mkl, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lmkl -lguide -lpthread"],,[-lguide -lpthread])
fi
# BLAS in Apple vecLib library?
if test $ax_blas_ok = no; then
save_LIBS="$LIBS"; LIBS="-framework Accelerate $LIBS"
AC_MSG_CHECKING([for $sgemm in -framework Accelerate])
AC_LINK_IFELSE([AC_LANG_CALL([], [$sgemm])], [ax_blas_ok=yes;BLAS_LIBS="-framework Accelerate"])
AC_MSG_RESULT($ax_blas_ok)
LIBS="$save_LIBS"
fi
# BLAS in Alpha CXML library?
if test $ax_blas_ok = no; then
AC_CHECK_LIB(cxml, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lcxml"])
fi
# BLAS in Alpha DXML library? (now called CXML, see above)
if test $ax_blas_ok = no; then
AC_CHECK_LIB(dxml, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-ldxml"])
fi
# BLAS in Sun Performance library?
if test $ax_blas_ok = no; then
if test "x$GCC" != xyes; then # only works with Sun CC
AC_CHECK_LIB(sunmath, acosp,
[AC_CHECK_LIB(sunperf, $sgemm,
[BLAS_LIBS="-xlic_lib=sunperf -lsunmath"
ax_blas_ok=yes],[],[-lsunmath])])
fi
fi
# BLAS in SCSL library? (SGI/Cray Scientific Library)
if test $ax_blas_ok = no; then
AC_CHECK_LIB(scs, $sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lscs"])
fi
# BLAS in SGIMATH library?
if test $ax_blas_ok = no; then
AC_CHECK_LIB(complib.sgimath, $sgemm,
[ax_blas_ok=yes; BLAS_LIBS="-lcomplib.sgimath"])
fi
# BLAS in IBM ESSL library? (requires generic BLAS lib, too)
if test $ax_blas_ok = no; then
AC_CHECK_LIB(blas, $sgemm,
[AC_CHECK_LIB(essl, $sgemm,
[ax_blas_ok=yes; BLAS_LIBS="-lessl -lblas"],
[], [-lblas $FLIBS])])
fi
# Generic BLAS library?
if test $ax_blas_ok = no; then
AC_CHECK_LIB(blas, $sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lblas"])
fi
AC_SUBST(BLAS_LIBS)
LIBS="$ax_blas_save_LIBS"
# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test x"$ax_blas_ok" = xyes; then
ifelse([$1],,AC_DEFINE(HAVE_BLAS,1,[Define if you have a BLAS library.]),[$1])
:
else
ax_blas_ok=no
$2
fi
])dnl AX_BLAS
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