## Mercurial > hg > octave-max

### view acx_lapack.m4 @ 12078:48a9c78cfbc9 release-3-2-x

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datestr: set tm.isdst to -1 before calling mktime

author | E. Joshua Rigler <relgire@gmail.com> |
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date | Tue, 01 Sep 2009 09:31:39 +0200 |

parents | fd13f9f7dbac |

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# =========================================================================== # http://autoconf-archive.cryp.to/acx_lapack.html # =========================================================================== # # SYNOPSIS # # ACX_LAPACK([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) # # DESCRIPTION # # This macro looks for a library that implements the LAPACK linear-algebra # interface (see http://www.netlib.org/lapack/). On success, it sets the # LAPACK_LIBS output variable to hold the requisite library linkages. # # To link with LAPACK, you should link with: # # $LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS # # in that order. BLAS_LIBS is the output variable of the ACX_BLAS macro, # called automatically. FLIBS is the output variable of the # AC_F77_LIBRARY_LDFLAGS macro (called if necessary by ACX_BLAS), and is # sometimes necessary in order to link with F77 libraries. Users will also # need to use AC_F77_DUMMY_MAIN (see the autoconf manual), for the same # reason. # # The user may also use --with-lapack=<lib> in order to use some specific # LAPACK 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 LAPACK and BLAS # libraries. # # ACTION-IF-FOUND is a list of shell commands to run if a LAPACK 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_LAPACK. # # LAST MODIFICATION # # 2008-06-29 # # COPYLEFT # # Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu> # # 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_LAPACK], [ AC_REQUIRE([ACX_BLAS]) acx_lapack_ok=no AC_ARG_WITH(lapack, [AC_HELP_STRING([--with-lapack=<lib>], [use LAPACK library <lib>])]) case $with_lapack in yes | "") ;; no) acx_lapack_ok=disable ;; -* | */* | *.a | *.so | *.so.* | *.o) LAPACK_LIBS="$with_lapack" ;; *) LAPACK_LIBS="-l$with_lapack" ;; esac # Get fortran linker name of LAPACK function to check for. AC_F77_FUNC(cheev) # We cannot use LAPACK if BLAS is not found if test "x$acx_blas_ok" != xyes; then acx_lapack_ok=noblas LAPACK_LIBS="" fi # First, check LAPACK_LIBS environment variable if test "x$LAPACK_LIBS" != x; then save_LIBS="$LIBS"; LIBS="$LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS" AC_MSG_CHECKING([for $cheev in $LAPACK_LIBS]) AC_TRY_LINK_FUNC($cheev, [acx_lapack_ok=yes], [LAPACK_LIBS=""]) AC_MSG_RESULT($acx_lapack_ok) LIBS="$save_LIBS" if test $acx_lapack_ok = no; then LAPACK_LIBS="" fi fi # LAPACK linked to by default? (is sometimes included in BLAS lib) if test $acx_lapack_ok = no; then save_LIBS="$LIBS"; LIBS="$LIBS $BLAS_LIBS $FLIBS" AC_CHECK_FUNC($cheev, [acx_lapack_ok=yes]) LIBS="$save_LIBS" fi # Generic LAPACK library? for lapack in lapack lapack_rs6k; do if test $acx_lapack_ok = no; then save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS" AC_CHECK_LIB($lapack, $cheev, [acx_lapack_ok=yes; LAPACK_LIBS="-l$lapack"], [], [$FLIBS]) LIBS="$save_LIBS" fi done AC_SUBST(LAPACK_LIBS) # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: if test x"$acx_lapack_ok" = xyes; then ifelse([$1],,AC_DEFINE(HAVE_LAPACK,1,[Define if you have LAPACK library.]),[$1]) : else acx_lapack_ok=no $2 fi ])dnl ACX_LAPACK