# SYNOPSIS
#
# AX_CHECK_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.
#
# To call a BLAS function, use the F77_FUNC macro, defined in config.h
#
# 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>.
#
# 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.
#
# This macro requires autoconf 2.50 or later.
#
# The macro is a modified version of ACX_BLAS, from the autoconf macro
# archive. The original macro depends on a Fortran compiler, and this
# version does not. This version has not been tested extensively, but
# it is known to work with ATLAS and vecLib.
#
# LAST MODIFICATION
#
# 2009-10-8
#
# COPYLEFT
#
# Copyright (c) 2009 Patrick O. Perry <patperry@stanfordalumni.org>
# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
#
# 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 <http://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 Macro 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.
AC_DEFUN([AX_CHECK_BLAS], [
AC_PREREQ(2.50)
ax_blas_ok=no
AC_ARG_WITH([blas],
[AC_HELP_STRING([--with-blas=<lib>], [use BLAS library <lib>])])
case $with_blas in
yes | "") ;;
no) ax_blas_ok=disable ;;
-* | */* | *.a | *.so | *.so.* | *.o) BLAS_LIBS="$with_blas" ;;
*) BLAS_LIBS="-l$with_blas" ;;
esac
_AX_CHECK_BLAS([gemm_])
if test x$ax_blas_ok = xyes; then
ax_blas_underscore=yes
else
_AX_CHECK_BLAS([gemm])
if test x$ax_blas_ok = xyes; then
ax_blas_undersore=no
fi
fi
AC_SUBST([BLAS_LIBS])
if test x$ax_blas_ok = xyes; then
ifelse([$1],, [
AC_DEFINE(HAVE_BLAS,1, [Define if you have a BLAS library.])
AH_TEMPLATE([F77_FUNC],
[Define to a macro mangling the given Fortan function name])
if test x$ax_blas_underscore = xyes; then
AC_DEFINE([F77_FUNC(name)], [name ## _])
else
AC_DEFINE([F77_FUNC(name)], [name])
fi],
[$1])
:
else
ax_blas_ok=no
[$2]
fi
])dnl AX_CHECK_BLAS
# _AX_CHECK_BLAS(GEMM)
# --------------------------------------------------------
# Look for a BLAS library in all of the standard places by checking for the
# functions s$GEMM and d$GEMM. On success, define BLAS_LIBS, set
# ax_blas_ok to yes, and execute ACTION-IF-FOUND. On failure, set ax_blas_ok
# to no and execute ACTION-IF-NOT-FOUND.
AC_DEFUN([_AX_CHECK_BLAS], [
AC_PREREQ([2.50])
m4_pushdef([sgemm],[[s$1]])
m4_pushdef([dgemm],[[d$1]])
ax_blas_save_LIBS="$LIBS"
LIBS="$LIBS $FLIBS"
# First, check BLAS_LIBS environment variable
if test x$ax_blas_ok = xno; then
if test x$BLAS_LIBS != x; then
save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
AC_MSG_CHECKING([for ]sgemm[ in $BLAS_LIBS])
AC_TRY_LINK_FUNC(sgemm, [ax_blas_ok=yes], [BLAS_LIBS=""])
AC_MSG_RESULT([$ax_blas_ok])
LIBS="$save_LIBS"
fi
fi
# BLAS linked to by default? (happens on some supercomputers)
if test x$ax_blas_ok = xno; then
save_LIBS="$LIBS"; LIBS="$LIBS"
AC_CHECK_FUNC(sgemm, [ax_blas_ok=yes])
LIBS="$save_LIBS"
fi
# BLAS in ATLAS library? (http://math-atlas.sourceforge.net/)
if test x$ax_blas_ok = xno; 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 Intel MKL library?
if test x$ax_blas_ok = xno; then
AC_CHECK_LIB([mkl], sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lmkl"])
fi
# BLAS in Apple vecLib library?
if test x$ax_blas_ok = xno; then
save_LIBS="$LIBS"; LIBS="-framework vecLib $LIBS"
unset ac_cv_func_[]sgemm
AC_CHECK_FUNC(sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lblas"])
LIBS="$save_LIBS"
fi
# BLAS in PhiPACK libraries? (requires generic BLAS lib, too)
if test $ax_blas_ok = no; then
AC_CHECK_LIB([blas], sgemm,
[AC_CHECK_LIB([dgemm], dgemm,
[AC_CHECK_LIB([sgemm], sgemm,
[ax_blas_ok=yes; BLAS_LIBS="-lsgemm -ldgemm -lblas"],
[],
[-lblas])],
[],
[-lblas])])
fi
# BLAS in Alpha CXML library?
if test x$ax_blas_ok = xno; 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 x$ax_blas_ok = xno; then
AC_CHECK_LIB([dxml], sgemm, [ax_blas_ok=yes;BLAS_LIBS="-ldxml"])
fi
# BLAS in Sun Performance library?
if test x$ax_blas_ok = xno; then
if test "x$GCC" != xyes; then # only works with Sun CC
AC_CHECK_LIB([sunmath], [acosp],
[AC_CHECK_LIB([sunperf], sgemm,
[BLAS_LIBS="-xlic_lib=sunperf -lsunmath"
ax_blas_ok=yes],
[],
[-lsunmath])])
fi
fi
# BLAS in SCSL library? (SGI/Cray Scientific Library)
if test x$ax_blas_ok = xno; then
AC_CHECK_LIB([scs], sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lscs"])
fi
# BLAS in SGIMATH library?
if test x$ax_blas_ok = xno; then
AC_CHECK_LIB([complib.sgimath], sgemm,
[ax_blas_ok=yes; BLAS_LIBS="-lcomplib.sgimath"])
fi
# BLAS in IBM ESSL library? (requires generic BLAS lib, too)
if test x$ax_blas_ok = xno; then
AC_CHECK_LIB([blas], sgemm,
[AC_CHECK_LIB([essl], sgemm,
[ax_blas_ok=yes; BLAS_LIBS="-lessl -lblas"],
[],
[-lblas $FLIBS])])
fi
# Generic BLAS library?
if test x$ax_blas_ok = xno; then
AC_CHECK_LIB([blas], sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lblas"])
fi
LIBS="$ax_blas_save_LIBS"
m4_popdef([sgemm])
m4_popdef([dgemm])
])dnl _AX_CHECK_BLAS