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bump version for snapshot
author John W. Eaton <jwe@octave.org>
date Wed, 25 Mar 2009 23:28:17 -0400
parents fd13f9f7dbac
children
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1 # ===========================================================================
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2 # http://autoconf-archive.cryp.to/acx_lapack.html
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3 # ===========================================================================
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4 #
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5 # SYNOPSIS
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6 #
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7 # ACX_LAPACK([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
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8 #
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9 # DESCRIPTION
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10 #
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11 # This macro looks for a library that implements the LAPACK linear-algebra
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12 # interface (see http://www.netlib.org/lapack/). On success, it sets the
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13 # LAPACK_LIBS output variable to hold the requisite library linkages.
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14 #
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15 # To link with LAPACK, you should link with:
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16 #
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17 # $LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS
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18 #
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19 # in that order. BLAS_LIBS is the output variable of the ACX_BLAS macro,
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20 # called automatically. FLIBS is the output variable of the
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21 # AC_F77_LIBRARY_LDFLAGS macro (called if necessary by ACX_BLAS), and is
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22 # sometimes necessary in order to link with F77 libraries. Users will also
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23 # need to use AC_F77_DUMMY_MAIN (see the autoconf manual), for the same
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24 # reason.
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25 #
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26 # The user may also use --with-lapack=<lib> in order to use some specific
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27 # LAPACK library <lib>. In order to link successfully, however, be aware
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28 # that you will probably need to use the same Fortran compiler (which can
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29 # be set via the F77 env. var.) as was used to compile the LAPACK and BLAS
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30 # libraries.
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31 #
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32 # ACTION-IF-FOUND is a list of shell commands to run if a LAPACK library
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33 # is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
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34 # is not found. If ACTION-IF-FOUND is not specified, the default action
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35 # will define HAVE_LAPACK.
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36 #
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37 # LAST MODIFICATION
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38 #
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39 # 2008-06-29
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40 #
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41 # COPYLEFT
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42 #
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43 # Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
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44 #
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45 # This program is free software: you can redistribute it and/or modify it
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46 # under the terms of the GNU General Public License as published by the
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47 # Free Software Foundation, either version 3 of the License, or (at your
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48 # option) any later version.
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49 #
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50 # This program is distributed in the hope that it will be useful, but
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51 # WITHOUT ANY WARRANTY; without even the implied warranty of
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52 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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53 # Public License for more details.
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54 #
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55 # You should have received a copy of the GNU General Public License along
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56 # with this program. If not, see <http://www.gnu.org/licenses/>.
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57 #
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58 # As a special exception, the respective Autoconf Macro's copyright owner
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59 # gives unlimited permission to copy, distribute and modify the configure
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60 # scripts that are the output of Autoconf when processing the Macro. You
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61 # need not follow the terms of the GNU General Public License when using
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62 # or distributing such scripts, even though portions of the text of the
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63 # Macro appear in them. The GNU General Public License (GPL) does govern
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64 # all other use of the material that constitutes the Autoconf Macro.
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65 #
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66 # This special exception to the GPL applies to versions of the Autoconf
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67 # Macro released by the Autoconf Macro Archive. When you make and
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68 # distribute a modified version of the Autoconf Macro, you may extend this
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69 # special exception to the GPL to apply to your modified version as well.
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70
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71 AC_DEFUN([ACX_LAPACK], [
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72 AC_REQUIRE([ACX_BLAS])
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73 acx_lapack_ok=no
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74
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75 AC_ARG_WITH(lapack,
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76 [AC_HELP_STRING([--with-lapack=<lib>], [use LAPACK library <lib>])])
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77 case $with_lapack in
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78 yes | "") ;;
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79 no) acx_lapack_ok=disable ;;
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80 -* | */* | *.a | *.so | *.so.* | *.o) LAPACK_LIBS="$with_lapack" ;;
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81 *) LAPACK_LIBS="-l$with_lapack" ;;
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82 esac
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83
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84 # Get fortran linker name of LAPACK function to check for.
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85 AC_F77_FUNC(cheev)
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86
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87 # We cannot use LAPACK if BLAS is not found
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88 if test "x$acx_blas_ok" != xyes; then
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89 acx_lapack_ok=noblas
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90 LAPACK_LIBS=""
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91 fi
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92
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93 # First, check LAPACK_LIBS environment variable
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94 if test "x$LAPACK_LIBS" != x; then
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95 save_LIBS="$LIBS"; LIBS="$LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS"
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96 AC_MSG_CHECKING([for $cheev in $LAPACK_LIBS])
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97 AC_TRY_LINK_FUNC($cheev, [acx_lapack_ok=yes], [LAPACK_LIBS=""])
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98 AC_MSG_RESULT($acx_lapack_ok)
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99 LIBS="$save_LIBS"
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100 if test $acx_lapack_ok = no; then
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101 LAPACK_LIBS=""
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102 fi
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103 fi
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104
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105 # LAPACK linked to by default? (is sometimes included in BLAS lib)
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106 if test $acx_lapack_ok = no; then
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107 save_LIBS="$LIBS"; LIBS="$LIBS $BLAS_LIBS $FLIBS"
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108 AC_CHECK_FUNC($cheev, [acx_lapack_ok=yes])
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109 LIBS="$save_LIBS"
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110 fi
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111
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112 # Generic LAPACK library?
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113 for lapack in lapack lapack_rs6k; do
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114 if test $acx_lapack_ok = no; then
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115 save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS"
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116 AC_CHECK_LIB($lapack, $cheev,
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117 [acx_lapack_ok=yes; LAPACK_LIBS="-l$lapack"], [], [$FLIBS])
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118 LIBS="$save_LIBS"
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119 fi
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120 done
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121
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122 AC_SUBST(LAPACK_LIBS)
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123
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124 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
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125 if test x"$acx_lapack_ok" = xyes; then
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126 ifelse([$1],,AC_DEFINE(HAVE_LAPACK,1,[Define if you have LAPACK library.]),[$1])
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127 :
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128 else
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129 acx_lapack_ok=no
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130 $2
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131 fi
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132 ])dnl ACX_LAPACK