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annotate m4/ax_blas_f77_func.m4 @ 18479:85d31344fb23 stable rc-3-8-1-2

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3.8.1 release candidate 2 * configure.ac (OCTAVE_VERSION): Bump to 3.8.1-rc2. (OCTAVE_MINOR_VERSION): Bump to 1-rc2. (OCTAVE_RELEASE_DATE): Set to 2014-02-14.
author John W. Eaton <jwe@octave.org>
date Mon, 17 Feb 2014 02:20:39 -0500
parents acdee77299e1
children d6240c099a02
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1 # ===========================================================================
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2 # http://www.gnu.org/software/autoconf-archive/ax_blas_f77_func.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 # AX_BLAS_F77_FUNC([ACTION-IF-PASS[, ACTION-IF-FAIL[, ACTION-IF-CROSS-COMPILING]])
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8 # AX_BLAS_WITH_F77_FUNC([ACTION-IF-FOUND-AND-PASS[, ACTION-IF-NOT-FOUND-OR-FAIL]])
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9 #
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10 # DESCRIPTION
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11 #
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12 # These macros are intended as a supplement to the AX_BLAS macro, to
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13 # verify that BLAS functions are properly callable from Fortran. This is
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14 # necessary, for example, if you want to build the LAPACK library on top
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15 # of the BLAS.
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16 #
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17 # AX_BLAS_F77_FUNC uses the defined BLAS_LIBS and Fortran environment to
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18 # check for compatibility, and takes a specific action in case of success,
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19 # resp. failure, resp. cross-compilation.
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20 #
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21 # AX_BLAS_WITH_F77_FUNC is a drop-in replacement wrapper for AX_BLAS that
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22 # calls AX_BLAS_F77_FUNC after detecting a BLAS library and rejects it on
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23 # failure (i.e. pretends that no library was found).
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24 #
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25 # LICENSE
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26 #
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27 # Copyright (c) 2008 Jaroslav Hajek <highegg@gmail.com>
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28 #
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29 # This program is free software: you can redistribute it and/or modify it
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30 # under the terms of the GNU General Public License as published by the
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31 # Free Software Foundation, either version 3 of the License, or (at your
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32 # option) any later version.
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33 #
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34 # This program is distributed in the hope that it will be useful, but
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35 # WITHOUT ANY WARRANTY; without even the implied warranty of
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36 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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37 # Public License for more details.
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38 #
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39 # You should have received a copy of the GNU General Public License along
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40 # with this program. If not, see <http://www.gnu.org/licenses/>.
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41 #
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42 # As a special exception, the respective Autoconf Macro's copyright owner
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43 # gives unlimited permission to copy, distribute and modify the configure
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44 # scripts that are the output of Autoconf when processing the Macro. You
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45 # need not follow the terms of the GNU General Public License when using
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46 # or distributing such scripts, even though portions of the text of the
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47 # Macro appear in them. The GNU General Public License (GPL) does govern
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48 # all other use of the material that constitutes the Autoconf Macro.
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49 #
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50 # This special exception to the GPL applies to versions of the Autoconf
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51 # Macro released by the Autoconf Archive. When you make and distribute a
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52 # modified version of the Autoconf Macro, you may extend this special
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53 # exception to the GPL to apply to your modified version as well.
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54
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55 #serial 8
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56
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57 AU_ALIAS([ACX_BLAS_F77_FUNC], [AX_BLAS_F77_FUNC])
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58
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59 AC_DEFUN([AX_BLAS_F77_FUNC], [
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60 AC_PREREQ(2.50)
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61 AC_REQUIRE([AX_BLAS])
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62
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63 ## F77 call-compatibility checks
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64 if test "$cross_compiling" = yes ; then
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65 ifelse($3, ,$1,$3)
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66 elif test x"$ax_blas_ok" = xyes; then
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67 save_ax_blas_f77_func_LIBS="$LIBS"
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68 LIBS="$BLAS_LIBS $LIBS"
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69 AC_LANG_PUSH(Fortran 77)
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70 ## LSAME check (LOGICAL return values)
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71 AC_MSG_CHECKING([whether LSAME is called correctly from Fortran])
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72 AC_RUN_IFELSE([AC_LANG_PROGRAM([], [[
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73 logical lsame,w
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74 external lsame
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75 character c1,c2
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76 c1 = 'A'
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77 c2 = 'B'
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78 w = lsame(c1,c2)
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79 if (w) stop 1
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80 w = lsame(c1,c1)
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81 if (.not. w) stop 1
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82 ]])],
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83 [ax_blas_lsame_fcall_ok=yes],
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84 [ax_blas_lsame_fcall_ok=no])
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85 AC_MSG_RESULT([$ax_blas_lsame_fcall_ok])
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86 ## ISAMAX check (INTEGER return values)
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87 AC_MSG_CHECKING([whether ISAMAX is called correctly from Fortran])
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88 AC_RUN_IFELSE([AC_LANG_PROGRAM([], [[
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89 integer isamax,i
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90 external isamax
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91 real a(2)
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92 a(1) = 1e0
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93 a(2) = -2e0
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94 i = isamax(2,a,1)
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95 if (i.ne.2) stop 1
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96 ]])],
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97 [ax_blas_isamax_fcall_ok=yes],
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98 [ax_blas_isamax_fcall_ok=no])
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99 AC_MSG_RESULT([$ax_blas_isamax_fcall_ok])
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100 ## SDOT check (REAL return values)
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101 AC_MSG_CHECKING([whether SDOT is called correctly from Fortran])
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102 AC_RUN_IFELSE([AC_LANG_PROGRAM([], [[
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103 real sdot,a(1),b(1),w
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104 external sdot
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105 a(1) = 1e0
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106 b(1) = 2e0
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107 w = sdot(1,a,1,b,1)
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108 if (w .ne. a(1)*b(1)) stop 1
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109 ]])],
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110 [ax_blas_sdot_fcall_ok=yes],
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111 [ax_blas_sdot_fcall_ok=no])
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112 AC_MSG_RESULT([$ax_blas_sdot_fcall_ok])
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113 ## DDOT check (DOUBLE return values)
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114 AC_MSG_CHECKING([whether DDOT is called correctly from Fortran])
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115 AC_RUN_IFELSE([AC_LANG_PROGRAM([], [[
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116 double precision ddot,a(1),b(1),w
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117 external ddot
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118 a(1) = 1d0
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119 b(1) = 2d0
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120 w = ddot(1,a,1,b,1)
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121 if (w .ne. a(1)*b(1)) stop 1
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122 ]])],
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123 [ax_blas_ddot_fcall_ok=yes],
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124 [ax_blas_ddot_fcall_ok=no])
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125 AC_MSG_RESULT([$ax_blas_ddot_fcall_ok])
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126 ## CDOTU check (COMPLEX return values)
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127 AC_MSG_CHECKING([whether CDOTU is called correctly from Fortran])
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128 AC_RUN_IFELSE([AC_LANG_PROGRAM([], [[
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129 complex cdotu,a(1),b(1),w
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130 external cdotu
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131 a(1) = cmplx(1e0,1e0)
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132 b(1) = cmplx(1e0,2e0)
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133 w = cdotu(1,a,1,b,1)
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134 if (w .ne. a(1)*b(1)) stop 1
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135 ]])],
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136 [ax_blas_cdotu_fcall_ok=yes],
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137 [ax_blas_cdotu_fcall_ok=no])
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138 AC_MSG_RESULT([$ax_blas_cdotu_fcall_ok])
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139 ## ZDOTU check (DOUBLE COMPLEX return values)
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140 AC_MSG_CHECKING([whether ZDOTU is called correctly from Fortran])
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141 AC_RUN_IFELSE([AC_LANG_PROGRAM([], [[
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142 double complex zdotu,a(1),b(1),w
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143 external zdotu
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144 a(1) = dcmplx(1d0,1d0)
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145 b(1) = dcmplx(1d0,2d0)
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146 w = zdotu(1,a,1,b,1)
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147 if (w .ne. a(1)*b(1)) stop 1
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148 ]])],
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149 [ax_blas_zdotu_fcall_ok=yes],
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150 [ax_blas_zdotu_fcall_ok=no])
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151 AC_MSG_RESULT([$ax_blas_zdotu_fcall_ok])
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152 ## Check for correct integer size
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153 ## FIXME: this may fail with things like -ftrapping-math.
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154 AC_MSG_CHECKING([whether the integer size is correct])
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155 AC_RUN_IFELSE([AC_LANG_PROGRAM([], [[
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156 integer n,nn(3)
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157 real s,a(1),b(1),sdot
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158 a(1) = 1.0
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159 b(1) = 1.0
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160 c Generate -2**32 + 1, if possible
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161 n = 2
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162 n = -4 ** (n ** 30)
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163 n = n + 1
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164 if (n >= 0) goto 1
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165 c This means we're on 64-bit integers. Check whether the BLAS is, too.
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166 s = sdot(n,a,1,b,1)
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167 if (s .ne. 0.0) stop 1
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168 1 continue
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169 c We may be on 32-bit integers, and the BLAS on 64 bits. This is almost bound
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170 c to have already failed, but just in case, we'll check.
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171 nn(1) = -1
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172 nn(2) = 1
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173 nn(3) = -1
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174 s = sdot(nn(2),a,1,b,1)
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175 if (s .ne. 1.0) stop 1
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176 ]])],
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177 [ax_blas_integer_size_ok=yes],
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178 [ax_blas_integer_size_ok=no])
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179 AC_MSG_RESULT([$ax_blas_integer_size_ok])
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180
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181 AC_LANG_POP(Fortran 77)
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182
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183 ## if any of the tests failed, reject the BLAS library
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184 if test $ax_blas_lsame_fcall_ok = yes \
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185 -a $ax_blas_sdot_fcall_ok = yes \
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186 -a $ax_blas_ddot_fcall_ok = yes \
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187 -a $ax_blas_cdotu_fcall_ok = yes \
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188 -a $ax_blas_zdotu_fcall_ok = yes \
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189 -a $ax_blas_integer_size_ok = yes; then
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190 ax_blas_f77_func_ok=yes;
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191 $1
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192 else
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193 ax_blas_f77_func_ok=no;
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194 $2
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195 fi
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196 LIBS="$save_ax_blas_f77_func_LIBS"
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197 fi
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198 ])dnl AX_BLAS_F77_FUNC
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199
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200 AC_DEFUN([AX_BLAS_WITH_F77_FUNC], [
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201 AC_PREREQ(2.50)
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202 AX_BLAS([# disable special action], [])
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203 if test x$ax_blas_ok = xyes ; then
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204 AX_BLAS_F77_FUNC(
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205 [ifelse([$1],,AC_DEFINE(HAVE_BLAS,1,[Define if you have a BLAS library.]),[$1])],
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206 [ax_blas_ok=no; BLAS_LIBS=],
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207 [$3])
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208 fi
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209 if test x$ax_blas_ok = xno ; then
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210 $2
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211 fi
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212 ])dnl AX_BLAS_WITH_F77_FUNC