1# 2010/11/09 - Modified to use new syntax for sunperf. MTP
2# ===========================================================================
3#          http://www.gnu.org/software/autoconf-archive/ax_blas.html
4# ===========================================================================
5#
6# SYNOPSIS
7#
8#   AX_BLAS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
9#
10# DESCRIPTION
11#
12#   This macro looks for a library that implements the BLAS linear-algebra
13#   interface (see http://www.netlib.org/blas/). On success, it sets the
14#   BLAS_LIBS output variable to hold the requisite library linkages.
15#
16#   To link with BLAS, you should link with:
17#
18#     $BLAS_LIBS $LIBS $FLIBS
19#
20#   in that order. FLIBS is the output variable of the
21#   AC_F77_LIBRARY_LDFLAGS macro (called if necessary by AX_BLAS), and is
22#   sometimes necessary in order to link with F77 libraries. Users will also
23#   need to use AC_F77_DUMMY_MAIN (see the autoconf manual), for the same
24#   reason.
25#
26#   Many libraries are searched for, from ATLAS to CXML to ESSL. The user
27#   may also use --with-blas=<lib> in order to use some specific BLAS
28#   library <lib>. In order to link successfully, however, be aware that you
29#   will probably need to use the same Fortran compiler (which can be set
30#   via the F77 env. var.) as was used to compile the BLAS library.
31#
32#   ACTION-IF-FOUND is a list of shell commands to run if a BLAS library is
33#   found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it is
34#   not found. If ACTION-IF-FOUND is not specified, the default action will
35#   define HAVE_BLAS.
36#
37# LICENSE
38#
39#   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
40#
41#   This program is free software: you can redistribute it and/or modify it
42#   under the terms of the GNU General Public License as published by the
43#   Free Software Foundation, either version 3 of the License, or (at your
44#   option) any later version.
45#
46#   This program is distributed in the hope that it will be useful, but
47#   WITHOUT ANY WARRANTY; without even the implied warranty of
48#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
49#   Public License for more details.
50#
51#   You should have received a copy of the GNU General Public License along
52#   with this program. If not, see <http://www.gnu.org/licenses/>.
53#
54#   As a special exception, the respective Autoconf Macro's copyright owner
55#   gives unlimited permission to copy, distribute and modify the configure
56#   scripts that are the output of Autoconf when processing the Macro. You
57#   need not follow the terms of the GNU General Public License when using
58#   or distributing such scripts, even though portions of the text of the
59#   Macro appear in them. The GNU General Public License (GPL) does govern
60#   all other use of the material that constitutes the Autoconf Macro.
61#
62#   This special exception to the GPL applies to versions of the Autoconf
63#   Macro released by the Autoconf Archive. When you make and distribute a
64#   modified version of the Autoconf Macro, you may extend this special
65#   exception to the GPL to apply to your modified version as well.
66
67#serial 11
68
69AU_ALIAS([ACX_BLAS], [AX_BLAS])
70AC_DEFUN([AX_BLAS], [
71AC_PREREQ(2.50)
72AC_REQUIRE([AC_F77_LIBRARY_LDFLAGS])
73ax_blas_ok=no
74
75AC_ARG_WITH(blas,
76	[AS_HELP_STRING([--with-blas=<lib>], [use BLAS library <lib>])])
77case $with_blas in
78	yes | "") ;;
79	no) ax_blas_ok=disable ;;
80	-* | */* | *.a | *.so | *.so.* | *.o) BLAS_LIBS="$with_blas" ;;
81	*) BLAS_LIBS="-l$with_blas" ;;
82esac
83
84# Get fortran linker names of BLAS functions to check for.
85AC_F77_FUNC(sgemm)
86AC_F77_FUNC(dgemm)
87
88ax_blas_save_LIBS="$LIBS"
89LIBS="$LIBS $FLIBS"
90
91# First, check BLAS_LIBS environment variable
92if test $ax_blas_ok = no; then
93if test "x$BLAS_LIBS" != x; then
94	save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
95	AC_MSG_CHECKING([for $sgemm in $BLAS_LIBS])
96	AC_TRY_LINK_FUNC($sgemm, [ax_blas_ok=yes], [BLAS_LIBS=""])
97	AC_MSG_RESULT($ax_blas_ok)
98	LIBS="$save_LIBS"
99fi
100fi
101
102# BLAS linked to by default?  (happens on some supercomputers)
103if test $ax_blas_ok = no; then
104	save_LIBS="$LIBS"; LIBS="$LIBS"
105	AC_MSG_CHECKING([if $sgemm is being linked in already])
106	AC_TRY_LINK_FUNC($sgemm, [ax_blas_ok=yes])
107	AC_MSG_RESULT($ax_blas_ok)
108	LIBS="$save_LIBS"
109fi
110
111# BLAS in ATLAS library? (http://math-atlas.sourceforge.net/)
112if test $ax_blas_ok = no; then
113	AC_CHECK_LIB(atlas, ATL_xerbla,
114		[AC_CHECK_LIB(f77blas, $sgemm,
115		[AC_CHECK_LIB(cblas, cblas_dgemm,
116			[ax_blas_ok=yes
117			 BLAS_LIBS="-lcblas -lf77blas -latlas"],
118			[], [-lf77blas -latlas])],
119			[], [-latlas])])
120fi
121
122# BLAS in PhiPACK libraries? (requires generic BLAS lib, too)
123if test $ax_blas_ok = no; then
124	AC_CHECK_LIB(blas, $sgemm,
125		[AC_CHECK_LIB(dgemm, $dgemm,
126		[AC_CHECK_LIB(sgemm, $sgemm,
127			[ax_blas_ok=yes; BLAS_LIBS="-lsgemm -ldgemm -lblas"],
128			[], [-lblas])],
129			[], [-lblas])])
130fi
131
132# BLAS in Intel MKL library?
133if test $ax_blas_ok = no; then
134	AC_CHECK_LIB(mkl, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lmkl"])
135fi
136
137# BLAS in Apple vecLib library?
138if test $ax_blas_ok = no; then
139	save_LIBS="$LIBS"; LIBS="-framework vecLib $LIBS"
140	AC_MSG_CHECKING([for $sgemm in -framework vecLib])
141	AC_TRY_LINK_FUNC($sgemm, [ax_blas_ok=yes;BLAS_LIBS="-framework vecLib"])
142	AC_MSG_RESULT($ax_blas_ok)
143	LIBS="$save_LIBS"
144fi
145
146# BLAS in Alpha CXML library?
147if test $ax_blas_ok = no; then
148	AC_CHECK_LIB(cxml, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lcxml"])
149fi
150
151# BLAS in Alpha DXML library? (now called CXML, see above)
152if test $ax_blas_ok = no; then
153	AC_CHECK_LIB(dxml, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-ldxml"])
154fi
155
156# BLAS in Sun Performance library?
157if test $ax_blas_ok = no; then
158	if test "x$GCC" != xyes; then # only works with Sun CC
159		AC_CHECK_LIB(sunmath, acosp,
160			[AC_CHECK_LIB(sunperf, $sgemm,
161				[BLAS_LIBS="-library=sunperf"
162                                 ax_blas_ok=yes])])
163	fi
164fi
165
166# BLAS in SCSL library?  (SGI/Cray Scientific Library)
167if test $ax_blas_ok = no; then
168	AC_CHECK_LIB(scs, $sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lscs"])
169fi
170
171# BLAS in SGIMATH library?
172if test $ax_blas_ok = no; then
173	AC_CHECK_LIB(complib.sgimath, $sgemm,
174		     [ax_blas_ok=yes; BLAS_LIBS="-lcomplib.sgimath"])
175fi
176
177# BLAS in IBM ESSL library? (requires generic BLAS lib, too)
178if test $ax_blas_ok = no; then
179	AC_CHECK_LIB(blas, $sgemm,
180		[AC_CHECK_LIB(essl, $sgemm,
181			[ax_blas_ok=yes; BLAS_LIBS="-lessl -lblas"],
182			[], [-lblas $FLIBS])])
183fi
184
185# Generic BLAS library?
186if test $ax_blas_ok = no; then
187	AC_CHECK_LIB(blas, $sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lblas"])
188fi
189
190AC_SUBST(BLAS_LIBS)
191
192LIBS="$ax_blas_save_LIBS"
193
194# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
195if test x"$ax_blas_ok" = xyes; then
196        ifelse([$1],,AC_DEFINE(HAVE_BLAS,1,[Define if you have a BLAS library.]),[$1])
197        :
198else
199        ax_blas_ok=no
200        $2
201fi
202])dnl AX_BLAS
203