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| author | Markus Mützel <markus.muetzel@gmx.de> |
|---|---|
| date | Tue, 30 Aug 2022 11:16:27 +0200 |
| parents | 9d2a4a270807 |
| children |
| rev | line source |
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1 # =========================================================================== |
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2 # https://www.gnu.org/software/autoconf-archive/ax_lapack.html |
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3 # =========================================================================== |
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4 # |
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5 # SYNOPSIS |
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6 # |
| 10951 | 7 # AX_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 # |
| 10951 | 17 # $LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS |
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18 # |
| 10951 | 19 # in that order. BLAS_LIBS is the output variable of the AX_BLAS macro, |
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20 # called automatically. FLIBS is the output variable of the |
| 10951 | 21 # AC_F77_LIBRARY_LDFLAGS macro (called if necessary by AX_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 # |
| 10951 | 37 # LICENSE |
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38 # |
| 10951 | 39 # Copyright (c) 2009 Steven G. Johnson <stevenj@alum.mit.edu> |
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40 # Copyright (c) 2019 Geoffrey M. Oxberry <goxberry@gmail.com> |
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41 # |
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42 # This program is free software: you can redistribute it and/or modify it |
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43 # under the terms of the GNU General Public License as published by the |
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44 # Free Software Foundation, either version 3 of the License, or (at your |
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45 # option) any later version. |
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46 # |
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47 # This program is distributed in the hope that it will be useful, but |
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48 # WITHOUT ANY WARRANTY; without even the implied warranty of |
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49 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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50 # Public License for more details. |
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51 # |
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52 # You should have received a copy of the GNU General Public License along |
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53 # with this program. If not, see <https://www.gnu.org/licenses/>. |
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54 # |
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55 # As a special exception, the respective Autoconf Macro's copyright owner |
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56 # gives unlimited permission to copy, distribute and modify the configure |
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57 # scripts that are the output of Autoconf when processing the Macro. You |
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58 # need not follow the terms of the GNU General Public License when using |
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59 # or distributing such scripts, even though portions of the text of the |
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60 # Macro appear in them. The GNU General Public License (GPL) does govern |
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61 # all other use of the material that constitutes the Autoconf Macro. |
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62 # |
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63 # This special exception to the GPL applies to versions of the Autoconf |
| 10951 | 64 # Macro released by the Autoconf Archive. When you make and distribute a |
| 65 # modified version of the Autoconf Macro, you may extend this special | |
| 66 # exception to the GPL to apply to your modified version as well. | |
| 3887 | 67 |
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68 #serial 10 |
| 10951 | 69 |
| 70 AU_ALIAS([ACX_LAPACK], [AX_LAPACK]) | |
| 71 AC_DEFUN([AX_LAPACK], [ | |
| 72 AC_REQUIRE([AX_BLAS]) | |
| 73 ax_lapack_ok=no | |
| 3887 | 74 |
| 75 AC_ARG_WITH(lapack, | |
| 10951 | 76 [AS_HELP_STRING([--with-lapack=<lib>], [use LAPACK library <lib>])]) |
| 3887 | 77 case $with_lapack in |
| 78 yes | "") ;; | |
| 10951 | 79 no) ax_lapack_ok=disable ;; |
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80 -* | */* | *.a | *.so | *.so.* | *.dylib | *.dylib.* | *.o) |
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81 LAPACK_LIBS="$with_lapack" |
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82 ;; |
| 3887 | 83 *) LAPACK_LIBS="-l$with_lapack" ;; |
| 84 esac | |
| 85 | |
| 86 # Get fortran linker name of LAPACK function to check for. | |
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87 AC_F77_FUNC(cheev) |
| 3887 | 88 |
| 89 # We cannot use LAPACK if BLAS is not found | |
| 10951 | 90 if test "x$ax_blas_ok" != xyes; then |
| 91 ax_lapack_ok=noblas | |
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92 LAPACK_LIBS="" |
| 3887 | 93 fi |
| 94 | |
| 95 # First, check LAPACK_LIBS environment variable | |
| 96 if test "x$LAPACK_LIBS" != x; then | |
| 97 save_LIBS="$LIBS"; LIBS="$LAPACK_LIBS $BLAS_LIBS $LIBS $FLIBS" | |
| 98 AC_MSG_CHECKING([for $cheev in $LAPACK_LIBS]) | |
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99 AC_LINK_IFELSE([AC_LANG_CALL([], [$cheev])], [ax_lapack_ok=yes], [LAPACK_LIBS=""]) |
| 10951 | 100 AC_MSG_RESULT($ax_lapack_ok) |
| 3887 | 101 LIBS="$save_LIBS" |
| 10951 | 102 if test $ax_lapack_ok = no; then |
| 3887 | 103 LAPACK_LIBS="" |
| 104 fi | |
| 105 fi | |
| 106 | |
| 107 # LAPACK linked to by default? (is sometimes included in BLAS lib) | |
| 10951 | 108 if test $ax_lapack_ok = no; then |
| 3887 | 109 save_LIBS="$LIBS"; LIBS="$LIBS $BLAS_LIBS $FLIBS" |
| 10951 | 110 AC_CHECK_FUNC($cheev, [ax_lapack_ok=yes]) |
| 3887 | 111 LIBS="$save_LIBS" |
| 112 fi | |
| 113 | |
| 114 # Generic LAPACK library? | |
| 115 for lapack in lapack lapack_rs6k; do | |
| 10951 | 116 if test $ax_lapack_ok = no; then |
| 3887 | 117 save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS" |
| 118 AC_CHECK_LIB($lapack, $cheev, | |
| 10951 | 119 [ax_lapack_ok=yes; LAPACK_LIBS="-l$lapack"], [], [$FLIBS]) |
| 3887 | 120 LIBS="$save_LIBS" |
| 121 fi | |
| 122 done | |
| 123 | |
| 124 AC_SUBST(LAPACK_LIBS) | |
| 125 | |
| 126 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: | |
| 10951 | 127 if test x"$ax_lapack_ok" = xyes; then |
| 3887 | 128 ifelse([$1],,AC_DEFINE(HAVE_LAPACK,1,[Define if you have LAPACK library.]),[$1]) |
| 129 : | |
| 130 else | |
| 10951 | 131 ax_lapack_ok=no |
| 3887 | 132 $2 |
| 133 fi | |
| 10951 | 134 ])dnl AX_LAPACK |