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annotate acx_blas_f77_func.m4 @ 7948:af10baa63915 ss-3-1-50

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3.1.50 snapshot
author John W. Eaton <jwe@octave.org>
date Fri, 18 Jul 2008 17:42:48 -0400
parents 8136cb19fb7a
children fd13f9f7dbac
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1 ##### http://autoconf-archive.cryp.to/acx_blas_f77_func.html
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2 #
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3 # SYNOPSIS
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4 #
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5 # ACX_BLAS_F77_FUNC([ACTION-IF-PASS[, ACTION-IF-FAIL[, ACTION-IF-CROSS-COMPILING]])
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6 # ACX_BLAS_WITH_F77_FUNC([ACTION-IF-FOUND-AND-PASS[, ACTION-IF-NOT-FOUND-OR-FAIL]])
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7 #
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8 # DESCRIPTION
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9 #
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10 # These macros are intended as a supplement to the ACX_BLAS macro, to
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11 # verify that BLAS functions with non-REAL or INTEGER are properly
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12 # callable from Fortran. This is necessary, for example, if you want
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13 # to build the LAPACK library on top of the BLAS.
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14 #
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15 # ACX_BLAS_F77_FUNC uses the defined BLAS_LIBS and Fortran
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16 # environment to check for compatibility, and takes a specific action
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17 # in case of success, resp. failure, resp. cross-compilation.
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18 #
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19 # ACX_BLAS_WITH_F77_FUNC is a drop-in replacement wrapper for
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20 # ACX_BLAS that calls ACX_BLAS_F77_FUNC after detecting a BLAS
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21 # library and rejects it on failure (i.e. pretends that no library
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22 # was found).
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23 #
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24 # LAST MODIFICATION
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25 #
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26 # 2008-03-31
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27 #
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28 # COPYLEFT
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29 #
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30 # Copyright (c) 2008 Jaroslav Hajek <highegg@gmail.com>
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31 #
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32 # This program is free software: you can redistribute it and/or
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33 # modify it under the terms of the GNU General Public License as
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34 # published by the Free Software Foundation, either version 3 of the
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35 # License, or (at your option) any later version.
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36 #
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37 # This program is distributed in the hope that it will be useful, but
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38 # WITHOUT ANY WARRANTY; without even the implied warranty of
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39 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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40 # General Public License for more details.
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41 #
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42 # You should have received a copy of the GNU General Public License
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43 # along with this program. If not, see
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44 # <http://www.gnu.org/licenses/>.
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45 #
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46 # As a special exception, the respective Autoconf Macro's copyright
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47 # owner gives unlimited permission to copy, distribute and modify the
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48 # configure scripts that are the output of Autoconf when processing
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49 # the Macro. You need not follow the terms of the GNU General Public
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50 # License when using or distributing such scripts, even though
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51 # portions of the text of the Macro appear in them. The GNU General
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52 # Public License (GPL) does govern all other use of the material that
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53 # constitutes the Autoconf Macro.
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54 #
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55 # This special exception to the GPL applies to versions of the
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56 # Autoconf Macro released by the Autoconf Macro Archive. When you
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57 # make and distribute a modified version of the Autoconf Macro, you
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58 # may extend this special exception to the GPL to apply to your
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59 # modified version as well.
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60
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61 AC_DEFUN([ACX_BLAS_F77_FUNC], [
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62 AC_PREREQ(2.50)
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63 AC_REQUIRE([ACX_BLAS])
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64
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65 # F77 call-compatibility checks
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66 if test "$cross_compiling" = yes ; then
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67 ifelse($3, ,$1,$3)
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68 elif test x"$acx_blas_ok" = xyes; then
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69 LIBS="$BLAS_LIBS $LIBS"
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70 AC_LANG_PUSH(Fortran 77)
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71 # LSAME check (LOGICAL return values)
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72 AC_MSG_CHECKING([whether LSAME is called correctly from Fortran])
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73 AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[
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74 logical lsame,w
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75 external lsame
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76 character c1,c2
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77 c1 = 'A'
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78 c2 = 'B'
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79 w = lsame(c1,c2)
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80 if (w) stop 1
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81 w = lsame(c1,c1)
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82 if (.not. w) stop 1
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83 ]]),[acx_blas_lsame_fcall_ok=yes],
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84 [acx_blas_lsame_fcall_ok=no])
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85 AC_MSG_RESULT([$acx_blas_lsame_fcall_ok])
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86 # DDOT check (DOUBLE return values)
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87 AC_MSG_CHECKING([whether DDOT is called correctly from Fortran])
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88 AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[
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89 double precision ddot,a(1),b(1),w
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90 external ddot
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91 a(1) = 1e0
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92 b(1) = 2e0
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93 w = ddot(1,a,1,b,1)
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94 if (w .ne. a(1)*b(1)) stop 1
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95 ]]),[acx_blas_ddot_fcall_ok=yes],
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96 [acx_blas_ddot_fcall_ok=no])
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97 AC_MSG_RESULT([$acx_blas_ddot_fcall_ok])
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98 # CDOTU check (COMPLEX return values)
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99 AC_MSG_CHECKING([whether CDOTU is called correctly from Fortran])
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100 AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[
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101 complex cdotu,a(1),b(1),w
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102 external cdotu
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103 a(1) = cmplx(1e0,1e0)
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104 b(1) = cmplx(1e0,2e0)
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105 w = cdotu(1,a,1,b,1)
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106 if (w .ne. a(1)*b(1)) stop 1
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107 ]]),[acx_blas_cdotu_fcall_ok=yes],
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108 [acx_blas_cdotu_fcall_ok=no])
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109 AC_MSG_RESULT([$acx_blas_cdotu_fcall_ok])
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110 # ZDOTU check (DOUBLE COMPLEX return values)
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111 AC_MSG_CHECKING([whether ZDOTU is called correctly from Fortran])
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112 AC_RUN_IFELSE(AC_LANG_PROGRAM(,[[
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113 double complex zdotu,a(1),b(1),w
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114 external zdotu
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115 a(1) = dcmplx(1d0,1d0)
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116 b(1) = dcmplx(1d0,2d0)
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117 w = zdotu(1,a,1,b,1)
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118 if (w .ne. a(1)*b(1)) stop 1
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119 ]]),[acx_blas_zdotu_fcall_ok=yes],
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120 [acx_blas_zdotu_fcall_ok=no])
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121 AC_MSG_RESULT([$acx_blas_zdotu_fcall_ok])
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122
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123 AC_LANG_POP(Fortran 77)
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124
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125 # if any of the tests failed, reject the BLAS library
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126 if test $acx_blas_lsame_fcall_ok = yes \
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127 -a $acx_blas_ddot_fcall_ok = yes \
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128 -a $acx_blas_cdotu_fcall_ok = yes \
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129 -a $acx_blas_zdotu_fcall_ok = yes ; then
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130 acx_blas_f77_func_ok=yes;
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131 $1
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132 else
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133 acx_blas_f77_func_ok=no;
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134 $2
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135 fi
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136 fi
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137
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138 ])dnl ACX_BLAS_F77_FUNC
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139
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140 AC_DEFUN([ACX_BLAS_WITH_F77_FUNC], [
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141 AC_PREREQ(2.50)
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142 ACX_BLAS([# disable special action], [])
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143 if test x$acx_blas_ok = xyes ; then
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144 ACX_BLAS_F77_FUNC(
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145 [ifelse([$1],,AC_DEFINE(HAVE_BLAS,1,[Define if you have a BLAS library.]),[$1])],
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146 [acx_blas_ok=no; BLAS_LIBS=])
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147 fi
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148 if test x$acx_blas_ok = xno ; then
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149 $2
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150 fi
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151 ])dnl ACX_BLAS_WITH_F77_FUNC