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-# ===========================================================================
-# http://autoconf-archive.cryp.to/acx_blas.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-# ACX_CBLAS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
-#
-# DESCRIPTION
-#
-# This macro looks for a library that implements the CBLAS linear-algebra
-# interface (see http://www.netlib.org/blas/). On success, it sets the
-# CBLAS_LIBS output variable to hold the requisite library linkages.
-#
-# To link with BLAS, you should link with:
-#
-# $CBLAS_LIBS $LIBS
-#
-# 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 CBLAS
-# 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 CBLAS 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_CBLAS.
-#
-# This macro requires autoconf 2.50 or later.
-#
-# LAST MODIFICATION
-#
-# 2008-04-12
-#
-# COPYLEFT
-#
-# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
-# Copyright (c) 2008 Free Software Foundation, Inc.
-#
-# 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([ACX_CBLAS], [
-AC_PREREQ(2.50)
-dnl AC_REQUIRE([AC_F77_LIBRARY_LDFLAGS])
-AC_REQUIRE([AC_CANONICAL_HOST])
-acx_cblas_ok=no
-
-AC_ARG_WITH(cblas,
- [AC_HELP_STRING([--with-cblas=<lib>], [use CBLAS library <lib>])])
-case $with_cblas in
- yes | "") ;;
- no) acx_cblas_ok=disable ;;
- -* | */* | *.a | *.so | *.so.* | *.o) CBLAS_LIBS="$with_cblas" ;;
- *) CBLAS_LIBS="-l$with_cblas" ;;
-esac
-
-
-acx_cblas_save_LIBS="$LIBS"
-LIBS="$LIBS $FLIBS"
-
-# First, check CBLAS_LIBS environment variable
-if test $acx_cblas_ok = no; then
-if test "x$CBLAS_LIBS" != x; then
- save_LIBS="$LIBS"; LIBS="$CBLAS_LIBS $LIBS"
- AC_MSG_CHECKING([for cblas_sgemm in $CBLAS_LIBS])
- AC_TRY_LINK_FUNC(cblas_sgemm, [acx_cblas_ok=yes], [CBLAS_LIBS=""])
- AC_MSG_RESULT($acx_cblas_ok)
- LIBS="$save_LIBS"
-fi
-fi
-
-# CBLAS linked to by default? (happens on some supercomputers)
-if test $acx_cblas_ok = no; then
- save_LIBS="$LIBS"; LIBS="$LIBS"
- AC_CHECK_FUNC(cblas_sgemm, [acx_cblas_ok=yes])
- LIBS="$save_LIBS"
-fi
-
-# CBLAS in ATLAS library? (http://math-atlas.sourceforge.net/)
-if test $acx_cblas_ok = no; then
- AC_CHECK_LIB(atlas, ATL_xerbla,
- [AC_CHECK_LIB(cblas, cblas_dgemm,
- [acx_cblas_ok=yes
- CBLAS_LIBS="-lcblas -latlas"],
- [], [-latlas])],
- [], [-latlas])
-fi
-
-# CBLAS in ATLAS library in /usr/lib64/atlas (if not cross-compiling)
-if test $acx_cblas_ok = no && test "$cross_compiling" = no; then
- unset ac_cv_lib_atlas_ATL_xerbla
- unset ac_cv_lib_cblas_cblas_dgemm
- AC_CHECK_LIB(atlas, ATL_xerbla,
- [AC_CHECK_LIB(cblas, cblas_dgemm,
- [acx_cblas_ok=yes
- CBLAS_LIBS="-L/usr/lib64/atlas -lcblas -latlas"],
- [], [-L/usr/lib64/atlas -latlas])],
- [], [-L/usr/lib64/atlas -latlas])
-fi
-
-# CBLAS in ATLAS library in /usr/lib/atlas (if not cross-compiling)
-if test $acx_cblas_ok = no && test "$cross_compiling" = no; then
- unset ac_cv_lib_atlas_ATL_xerbla
- unset ac_cv_lib_cblas_cblas_dgemm
- AC_CHECK_LIB(atlas, ATL_xerbla,
- [AC_CHECK_LIB(cblas, cblas_dgemm,
- [acx_cblas_ok=yes
- CBLAS_LIBS="-L/usr/lib/atlas -lcblas -latlas"],
- [], [-L/usr/lib/atlas -latlas])],
- [], [-L/usr/lib/atlas -latlas])
-fi
-
-
-# CBLAS in PhiPACK libraries? (requires generic BLAS lib, too)
-if test $acx_cblas_ok = no; then
- AC_CHECK_LIB(cblas, cblas_sgemm,
- [AC_CHECK_LIB(dgemm, cblas_dgemm,
- [AC_CHECK_LIB(sgemm, cblas_sgemm,
- [acx_cblas_ok=yes; CBLAS_LIBS="-lsgemm -ldgemm -lblas"],
- [], [-lblas])],
- [], [-lblas])])
-fi
-
-# BLAS in Intel MKL library?
-if test $acx_cblas_ok = no; then
- AC_CHECK_LIB(mkl, cblas_sgemm, [acx_cblas_ok=yes;CBLAS_LIBS="-lmkl"])
-fi
-
-# CBLAS in Apple vecLib library?
-if test $acx_cblas_ok = no; then
- save_LIBS="$LIBS"; LIBS="-framework vecLib $LIBS"
- AC_CHECK_FUNC(cblas_sgemm, [acx_cblas_ok=yes;CBLAS_LIBS="-framework vecLib"])
- LIBS="$save_LIBS"
-fi
-
-# CBLAS in Alpha CXML library?
-if test $acx_cblas_ok = no; then
- AC_CHECK_LIB(cxml, cblas_sgemm, [acx_cblas_ok=yes;CBLAS_LIBS="-lcxml"])
-fi
-
-# CBLAS in Alpha DXML library? (now called CXML, see above)
-if test $acx_cblas_ok = no; then
- AC_CHECK_LIB(dxml, cblas_sgemm, [acx_cblas_ok=yes;CBLAS_LIBS="-ldxml"])
-fi
-
-# CBLAS in Sun Performance library?
-if test $acx_cblas_ok = no; then
- if test "x$GCC" != xyes; then # only works with Sun CC
- AC_CHECK_LIB(sunmath, acosp,
- [AC_CHECK_LIB(sunperf, cblas_sgemm,
- [CBLAS_LIBS="-xlic_lib=sunperf -lsunmath"
- acx_cblas_ok=yes],[],[-lsunmath])])
- fi
-fi
-
-# CBLAS in SCSL library? (SGI/Cray Scientific Library)
-if test $acx_cblas_ok = no; then
- AC_CHECK_LIB(scs, cblas_sgemm, [acx_cblas_ok=yes; CBLAS_LIBS="-lscs"])
-fi
-
-# CBLAS in SGIMATH library?
-if test $acx_cblas_ok = no; then
- AC_CHECK_LIB(complib.sgimath, cblas_sgemm,
- [acx_cblas_ok=yes; CBLAS_LIBS="-lcomplib.sgimath"])
-fi
-
-# CBLAS in IBM ESSL library? (requires generic CBLAS lib, too)
-if test $acx_cblas_ok = no; then
- AC_CHECK_LIB(cblas, cblas_sgemm,
- [AC_CHECK_LIB(essl, cblas_sgemm,
- [acx_cblas_ok=yes; CBLAS_LIBS="-lessl -lblas"],
- [], [-lblas $FLIBS])])
-fi
-
-# Generic CBLAS library?
-if test $acx_cblas_ok = no; then
- AC_CHECK_LIB(cblas, cblas_sgemm, [acx_cblas_ok=yes; CBLAS_LIBS="-lcblas"])
-fi
-
-# Generic BLAS library?
-if test $acx_cblas_ok = no; then
- AC_CHECK_LIB(blas, cblas_sgemm, [acx_cblas_ok=yes; CBLAS_LIBS="-lblas"])
-fi
-
-# GSL generic CBLAS library?
-if test $acx_cblas_ok = no; then
- AC_CHECK_LIB(gslcblas, cblas_sgemm, [acx_cblas_ok=yes; CBLAS_LIBS="-lgslcblas"])
-fi
-
-AC_SUBST(CBLAS_LIBS)
-
-LIBS="$acx_cblas_save_LIBS"
-
-# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
-if test x"$acx_cblas_ok" = xyes; then
- ifelse([$1],,AC_DEFINE(HAVE_CBLAS,1,[Define if you have a CBLAS library.]),[$1])
- :
-else
- acx_cblas_ok=no
- $2
-fi
-])dnl ACX_CBLAS
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