1# =========================================================================== 2# http://www.gnu.org/software/autoconf-archive/ax_lapack.html 3# =========================================================================== 4# 5# SYNOPSIS 6# 7# AX_LAPACK([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) 8# 9# DESCRIPTION 10# 11# This macro looks for a library that implements the LAPACK linear-algebra 12# interface (see http://www.netlib.org/lapack/). On success, it sets the 13# LAPACK_LIBS output variable to hold the requisite library linkages. 14# 15# To link with LAPACK, you should link with: 16# 17# $LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS 18# 19# in that order. BLAS_LIBS is the output variable of the AX_BLAS macro, 20# called automatically. 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# The user may also use --with-lapack=<lib> in order to use some specific 27# LAPACK library <lib>. In order to link successfully, however, be aware 28# that you will probably need to use the same Fortran compiler (which can 29# be set via the F77 env. var.) as was used to compile the LAPACK and BLAS 30# libraries. 31# 32# ACTION-IF-FOUND is a list of shell commands to run if a LAPACK library 33# is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it 34# is not found. If ACTION-IF-FOUND is not specified, the default action 35# will define HAVE_LAPACK. 36# 37# LICENSE 38# 39# Copyright (c) 2009 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 7 68 69AU_ALIAS([ACX_LAPACK], [AX_LAPACK]) 70AC_DEFUN([AX_LAPACK], [ 71AC_REQUIRE([AX_BLAS]) 72ax_lapack_ok=no 73 74AC_ARG_WITH(lapack, 75 [AS_HELP_STRING([--with-lapack=<lib>], [use LAPACK library <lib>])]) 76case $with_lapack in 77 yes | "") ;; 78 no) ax_lapack_ok=disable ;; 79 -* | */* | *.a | *.so | *.so.* | *.o) LAPACK_LIBS="$with_lapack" ;; 80 *) LAPACK_LIBS="-l$with_lapack" ;; 81esac 82 83# Get fortran linker name of LAPACK function to check for. 84AC_F77_FUNC(cheev) 85 86# We cannot use LAPACK if BLAS is not found 87if test "x$ax_blas_ok" != xyes; then 88 ax_lapack_ok=noblas 89 LAPACK_LIBS="" 90fi 91 92# First, check LAPACK_LIBS environment variable 93if test "x$LAPACK_LIBS" != x; then 94 save_LIBS="$LIBS"; LIBS="$LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS" 95 AC_MSG_CHECKING([for $cheev in $LAPACK_LIBS]) 96 AC_TRY_LINK_FUNC($cheev, [ax_lapack_ok=yes], [LAPACK_LIBS=""]) 97 AC_MSG_RESULT($ax_lapack_ok) 98 LIBS="$save_LIBS" 99 if test $ax_lapack_ok = no; then 100 LAPACK_LIBS="" 101 fi 102fi 103 104# LAPACK linked to by default? (is sometimes included in BLAS lib) 105if test $ax_lapack_ok = no; then 106 save_LIBS="$LIBS"; LIBS="$LIBS $BLAS_LIBS $FLIBS" 107 AC_CHECK_FUNC($cheev, [ax_lapack_ok=yes]) 108 LIBS="$save_LIBS" 109fi 110 111# Generic LAPACK library? 112for lapack in lapack lapack_rs6k; do 113 if test $ax_lapack_ok = no; then 114 save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS" 115 AC_CHECK_LIB($lapack, $cheev, 116 [ax_lapack_ok=yes; LAPACK_LIBS="-l$lapack"], [], [$FLIBS]) 117 LIBS="$save_LIBS" 118 fi 119done 120 121AC_SUBST(LAPACK_LIBS) 122 123# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: 124if test x"$ax_lapack_ok" = xyes; then 125 ifelse([$1],,AC_DEFINE(HAVE_LAPACK,1,[Define if you have LAPACK library.]),[$1]) 126 : 127else 128 ax_lapack_ok=no 129 $2 130fi 131])dnl AX_LAPACK 132