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dnl Check for BLAS
dnl Copyright 2011 Brice Boyer <bboyer@imag.fr>
dnl
dnl ========LICENCE========
dnl This file is part of the library FFLAS-FFPACK.
dnl
dnl FFLAS-FFPACK is free software: you can redistribute it and/or modify
dnl it under the terms of the GNU Lesser General Public
dnl License as published by the Free Software Foundation; either
dnl version 2.1 of the License, or (at your option) any later version.
dnl
dnl This library is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
dnl Lesser General Public License for more details.
dnl
dnl You should have received a copy of the GNU Lesser General Public
dnl License along with this library; if not, write to the Free Software
dnl Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
dnl ========LICENCE========
dnl/
dnl FF_CHECK_BLAS ([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl
dnl Test for BLAS and define BLAS_LIBS
AC_DEFUN([FF_CHECK_GOTOBLAS],
[
AC_ARG_WITH(gotoblas2,
[AC_HELP_STRING([--with-gotoblas2=<path|yes>],
[Use GOTO2 blas library. BLAS are mandatory for FFLAS-FFPACK
compilation. If argument is <yes> that means
the library is reachable with the standard search path
(/usr or /usr/local). Otherwise you give the <path> to
the directory which contains the library. If empty, GOTO2 are not searched for. ])
])
dnl echo $with_gotoblas2
dnl echo $withval
AS_IF([ test -n "$with_gotoblas2" ],
[ BLAS_HOME_PATH="${DEFAULT_CHECKING_PATH}"
AS_IF([ test "$with_gotoblas2" != "yes" ],
[ BLAS_HOME_PATH="$with_gotoblas2 ${DEFAULT_CHECKING_PATH}" ])
BACKUP_CXXFLAGS=${CXXFLAGS}
BACKUP_LIBS=${LIBS}
AC_MSG_CHECKING(for C interface to BLAS with -lgoto2)
for BLAS_HOME in ${BLAS_HOME_PATH} ; do
dnl remove last '/'
dnl BLAS_HOME=`echo $BLAS_HOME | sed 's/\(.*\)\/$/\1/'`
CBLAS="yes"
CBLAS_FLAG="-D__FFLASFFPACK_HAVE_CBLAS"
AS_IF([ test -r "$BLAS_HOME/lib/libgoto2.a" -o -r "$BLAS_HOME/lib/libgoto2.so" ],
[BLAS_LIBS="-lgoto2 -pthread"
AS_IF([ test "x$BLAS_HOME" != "x/usr" -a "x$BLAS_HOME" != "x/usr/local"],
[BLAS_LIBS="-L${BLAS_HOME}/lib -Wl,-R,${BLAS_HOME}/lib ${BLAS_LIBS}"])
],
[test -r "$BLAS_HOME/libgoto2.a" -o -r "$BLAS_HOME/libgoto2.so" ],
[ BLAS_LIBS="-lgoto2 -pthread"
AS_IF([ test "x$BLAS_HOME" != "x/usr" -a "x$BLAS_HOME" != "x/usr/local"],
[BLAS_LIBS="-L${BLAS_HOME} -Wl,-R,${BLAS_HOME}/lib ${BLAS_LIBS}"])
])
AS_CASE(["x$CCNAM"],
["xgcc"],[BLAS_LIBS="${BLAS_LIBS} -lgfortran"],
["xicc"],[BLAS_LIBS="${BLAS_LIBS} -lifcore"])
CXXFLAGS="${BACKUP_CXXFLAGS} ${CBLAS_FLAG}"
LIBS="${BACKUP_LIBS} ${BLAS_LIBS}"
AC_TRY_LINK(
[#define __FFLASFFPACK_CONFIGURATION
#include "fflas-ffpack/config-blas.h"],
[double a;],
[
AC_TRY_RUN(
[#define __FFLASFFPACK_CONFIGURATION
#include "fflas-ffpack/config-blas.h"
int main ()
{ double a[4] = {1.,2.,3.,4.}; double b[4]= {4.,3.,2.,1.}; double c[4];
cblas_dgemm(CblasRowMajor, CblasNoTrans,CblasNoTrans,2,2,2,1., a,2,b,2,0.,c,2);
if ( (c[0]!=8.) && (c[1]!=5.) && (c[2]!=20.) && (c[3]!=13))
return -1;
else
return 0;
} ],
[ blas_found="yes"
BLAS_PATH=${BLAS_HOME}
break ],
[ blas_problem="$problem $BLAS_HOME"
unset BLAS_LIBS ],
[ blas_found="yes"
blas_cross="yes"
BLAS_PATH=${BLAS_HOME}
break ])
],
[
blas_found="no"
blas_checked="$checked $BLAS_HOME"
unset BLAS_LIBS ]
)
done
AS_IF([ test "x$blas_found" = "xyes" ],[
BLAS_VENDOR="GOTO2"
AC_SUBST(BLAS_VENDOR)
AC_SUBST(BLAS_LIBS)
AC_SUBST(CBLAS_FLAG)
AC_SUBST(BLAS_PATH)
AC_DEFINE(HAVE_BLAS,1,[Define if BLAS is installed])
AC_DEFINE(HAVE_CBLAS,1,[Define if C interface to BLAS is available])
dnl AC_DEFINE(BLAS_AVAILABLE,,[Define if BLAS routines are available])
BLAS_FOUND=true
AC_SUBST(BLAS_FOUND)
HAVE_BLAS=yes
AS_IF([ test "x$blas_cross" != "xyes" ], [
AC_MSG_RESULT(found)],
[AC_MSG_RESULT(unknown)
echo "WARNING: You appear to be cross compiling, so there is no way to determine"
echo "whether your BLAS are good. I am assuming it is."
])
ifelse([$2], , :, [$2])
],
[ test -n "$blas_problem" ],
[ AC_MSG_RESULT(not working) ],
dnl echo "Sorry, your BLAS are not working. Disabling."
[test "x$blas_found" = "xno" ],
[AC_MSG_RESULT(not found)]
)
CXXFLAGS=${BACKUP_CXXFLAGS}
LIBS=${BACKUP_LIBS}
])
])
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