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# Configure paths for lapack
# Allin Cottrell <cottrell@wfu.edu>, last updated September 2013
dnl AM_PATH_LAPACK([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for LAPACK, and define LAPACK_CFLAGS and LAPACK_LIBS.
dnl
AC_DEFUN([AM_PATH_LAPACK],
[dnl
AC_ARG_WITH(lapack-prefix,[ --with-lapack-prefix=PFX Prefix where LAPACK is installed (optional)],
lapack_config_prefix="$withval", lapack_config_prefix="")
AC_ARG_VAR([LAPACK_LIBS],[linker flags for lapack, overriding auto-detection])
if test x"${LAPACK_LIBS}" = x ; then
AC_MSG_CHECKING(for libgfortran, libg2c or libf2c)
AC_CHECK_LIB(gfortran,_gfortran_abort,FLIB="-lgfortran",FLIB="none")
if test $FLIB = "none" ; then
AC_CHECK_LIB(g2c,c_sqrt,FLIB="-lg2c",FLIB="none")
fi
if test $FLIB = "none" ; then
AC_CHECK_LIB(f2c,c_sqrt,FLIB="-lf2c",FLIB="none")
fi
if test $FLIB = "none" ; then
echo "*** Couldn't find libgfortran, libg2c or libf2c"
FLIB=""
fi
fi
AC_MSG_CHECKING(for LAPACK)
if test x"${LAPACK_LIBS}" = x ; then
if test "x$lapack_config_prefix" = x ; then
LAPACK_LIBS="-llapack -lblas $FLIB"
else
LAPACK_LIBS="-L$lapack_config_prefix -llapack -lblas $FLIB"
fi
fi
ac_save_CFLAGS="$CFLAGS"
ac_save_LIBS="$LIBS"
CFLAGS="$LAPACK_CFLAGS $CFLAGS"
LIBS="$LAPACK_LIBS $LIBS"
dnl
dnl Check the installed LAPACK.
dnl
rm -f conf.lapacktest
AC_TRY_RUN([
#include <stdlib.h>
#include "gretl_f2c.h"
int main (void)
{
integer ispec;
real zero = 0.0;
real one = 1.0;
ieeeck_(&ispec, &zero, &one);
system("touch conf.lapacktest");
return 0;
}
],, no_lapack=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
if test "x$no_lapack" = x ; then
AC_MSG_RESULT(yes)
ifelse([$2], , :, [$2])
rm -f conf.blastest
AC_TRY_RUN([
#include <stdlib.h>
int openblas_get_parallel(void);
int main (void)
{
if (openblas_get_parallel() != 1) {
exit(EXIT_FAILURE);
}
system("touch conf.blastest");
return 0;
}
],blas_pthreads=yes,)
else
AC_MSG_RESULT(no)
if test -f conf.lapacktest ; then
:
else
echo "*** Could not run LAPACK test program, checking why..."
AC_TRY_LINK([
#include <stdio.h>
], [ return (1); ],
[ echo "*** The test program compiled, but did not run. This usually means"
echo "*** that the run-time linker is not finding LAPACK. If it is not"
echo "*** finding LAPACK, you'll need to set your LD_LIBRARY_PATH "
echo "*** environment variable, or edit /etc/ld.so.conf to point"
echo "*** to the installed location. Also, make sure you have run"
echo "*** ldconfig if that is required on your system."
echo "***" ],
[ echo "*** The test program failed to compile or link. See config.log for the"
echo "*** exact error that occured. This may mean LAPACK was incorrectly installed"
echo "*** or that you have moved LAPACK since it was installed." ])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
fi
LAPACK_CFLAGS=""
LAPACK_LIBS=""
ifelse([$3], , :, [$3])
fi
dnl finalize
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
AC_SUBST(LAPACK_CFLAGS)
AC_SUBST(LAPACK_LIBS)
AC_SUBST(FLIB)
rm -f conf.lapacktest
rm -f conf.blastest
])
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