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1 # =========================================================================== |
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2 # http://www.gnu.org/software/autoconf-archive/ax_blas.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([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 BLAS linear-algebra |
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12 # interface (see http://www.netlib.org/blas/). On success, it sets the |
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13 # BLAS_LIBS output variable to hold the requisite library linkages. |
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14 # |
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15 # To link with BLAS, you should link with: |
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16 # |
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17 # $BLAS_LIBS $LIBS $FLIBS |
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18 # |
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19 # in that order. FLIBS is the output variable of the |
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20 # AC_F77_LIBRARY_LDFLAGS macro (called if necessary by AX_BLAS), and is |
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21 # sometimes necessary in order to link with F77 libraries. Users will also |
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22 # need to use AC_F77_DUMMY_MAIN (see the autoconf manual), for the same |
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23 # reason. |
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24 # |
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25 # Many libraries are searched for, from ATLAS to CXML to ESSL. The user |
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26 # may also use --with-blas=<lib> in order to use some specific BLAS |
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27 # library <lib>. In order to link successfully, however, be aware that you |
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28 # will probably need to use the same Fortran compiler (which can be set |
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29 # via the F77 env. var.) as was used to compile the BLAS library. |
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30 # |
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31 # ACTION-IF-FOUND is a list of shell commands to run if a BLAS library is |
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32 # found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it is |
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33 # not found. If ACTION-IF-FOUND is not specified, the default action will |
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34 # define HAVE_BLAS. |
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35 # |
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36 # LICENSE |
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37 # |
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38 # Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu> |
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39 # |
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40 # This program is free software: you can redistribute it and/or modify it |
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41 # under the terms of the GNU General Public License as published by the |
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42 # Free Software Foundation, either version 3 of the License, or (at your |
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43 # option) any later version. |
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44 # |
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45 # This program is distributed in the hope that it will be useful, but |
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46 # WITHOUT ANY WARRANTY; without even the implied warranty of |
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47 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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48 # Public License for more details. |
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49 # |
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50 # You should have received a copy of the GNU General Public License along |
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51 # with this program. If not, see <http://www.gnu.org/licenses/>. |
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52 # |
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53 # As a special exception, the respective Autoconf Macro's copyright owner |
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54 # gives unlimited permission to copy, distribute and modify the configure |
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55 # scripts that are the output of Autoconf when processing the Macro. You |
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56 # need not follow the terms of the GNU General Public License when using |
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57 # or distributing such scripts, even though portions of the text of the |
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58 # Macro appear in them. The GNU General Public License (GPL) does govern |
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59 # all other use of the material that constitutes the Autoconf Macro. |
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60 # |
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61 # This special exception to the GPL applies to versions of the Autoconf |
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62 # Macro released by the Autoconf Archive. When you make and distribute a |
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63 # modified version of the Autoconf Macro, you may extend this special |
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64 # exception to the GPL to apply to your modified version as well. |
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65 |
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66 #serial 8 |
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67 |
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68 AU_ALIAS([ACX_BLAS], [AX_BLAS]) |
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69 AC_DEFUN([AX_BLAS], [ |
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70 AC_PREREQ(2.50) |
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71 AC_REQUIRE([AC_F77_LIBRARY_LDFLAGS]) |
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72 ax_blas_ok=no |
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73 |
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74 AC_ARG_WITH(blas, |
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75 [AS_HELP_STRING([--with-blas=<lib>], [use BLAS library <lib>])]) |
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76 case $with_blas in |
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77 yes | "") ;; |
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78 no) ax_blas_ok=disable ;; |
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79 -* | */* | *.a | *.so | *.so.* | *.o) BLAS_LIBS="$with_blas" ;; |
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80 *) BLAS_LIBS="-l$with_blas" ;; |
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81 esac |
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82 |
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83 # Get fortran linker names of BLAS functions to check for. |
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84 AC_F77_FUNC(sgemm) |
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85 AC_F77_FUNC(dgemm) |
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86 |
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87 ax_blas_save_LIBS="$LIBS" |
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88 LIBS="$LIBS $FLIBS" |
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89 |
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90 # First, check BLAS_LIBS environment variable |
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91 if test $ax_blas_ok = no; then |
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92 if test "x$BLAS_LIBS" != x; then |
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93 save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS" |
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94 AC_MSG_CHECKING([for $sgemm in $BLAS_LIBS]) |
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95 AC_TRY_LINK_FUNC($sgemm, [ax_blas_ok=yes], [BLAS_LIBS=""]) |
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96 AC_MSG_RESULT($ax_blas_ok) |
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97 LIBS="$save_LIBS" |
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98 fi |
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99 fi |
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100 |
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101 # BLAS linked to by default? (happens on some supercomputers) |
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102 if test $ax_blas_ok = no; then |
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103 save_LIBS="$LIBS"; LIBS="$LIBS" |
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104 AC_CHECK_FUNC($sgemm, [ax_blas_ok=yes]) |
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105 LIBS="$save_LIBS" |
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106 fi |
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107 |
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108 # BLAS in ATLAS library? (http://math-atlas.sourceforge.net/) |
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109 if test $ax_blas_ok = no; then |
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110 AC_CHECK_LIB(atlas, ATL_xerbla, |
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111 [AC_CHECK_LIB(f77blas, $sgemm, |
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112 [AC_CHECK_LIB(cblas, cblas_dgemm, |
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113 [ax_blas_ok=yes |
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114 BLAS_LIBS="-lcblas -lf77blas -latlas"], |
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115 [], [-lf77blas -latlas])], |
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116 [], [-latlas])]) |
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117 fi |
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118 |
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119 # BLAS in PhiPACK libraries? (requires generic BLAS lib, too) |
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120 if test $ax_blas_ok = no; then |
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121 AC_CHECK_LIB(blas, $sgemm, |
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122 [AC_CHECK_LIB(dgemm, $dgemm, |
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123 [AC_CHECK_LIB(sgemm, $sgemm, |
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124 [ax_blas_ok=yes; BLAS_LIBS="-lsgemm -ldgemm -lblas"], |
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125 [], [-lblas])], |
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126 [], [-lblas])]) |
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127 fi |
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128 |
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129 # BLAS in Intel MKL library? |
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130 if test $ax_blas_ok = no; then |
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131 AC_CHECK_LIB(mkl, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lmkl"]) |
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132 fi |
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133 |
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134 # BLAS in Apple vecLib library? |
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135 if test $ax_blas_ok = no; then |
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136 save_LIBS="$LIBS"; LIBS="-framework vecLib $LIBS" |
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137 AC_CHECK_FUNC($sgemm, [ax_blas_ok=yes;BLAS_LIBS="-framework vecLib"]) |
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138 LIBS="$save_LIBS" |
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139 fi |
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140 |
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141 # BLAS in Alpha CXML library? |
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142 if test $ax_blas_ok = no; then |
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143 AC_CHECK_LIB(cxml, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-lcxml"]) |
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144 fi |
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145 |
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146 # BLAS in Alpha DXML library? (now called CXML, see above) |
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147 if test $ax_blas_ok = no; then |
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148 AC_CHECK_LIB(dxml, $sgemm, [ax_blas_ok=yes;BLAS_LIBS="-ldxml"]) |
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149 fi |
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150 |
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151 # BLAS in Sun Performance library? |
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152 if test $ax_blas_ok = no; then |
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153 if test "x$GCC" != xyes; then # only works with Sun CC |
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154 AC_CHECK_LIB(sunmath, acosp, |
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155 [AC_CHECK_LIB(sunperf, $sgemm, |
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156 [BLAS_LIBS="-xlic_lib=sunperf -lsunmath" |
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157 ax_blas_ok=yes],[],[-lsunmath])]) |
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158 fi |
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159 fi |
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160 |
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161 # BLAS in SCSL library? (SGI/Cray Scientific Library) |
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162 if test $ax_blas_ok = no; then |
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163 AC_CHECK_LIB(scs, $sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lscs"]) |
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164 fi |
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165 |
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166 # BLAS in SGIMATH library? |
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167 if test $ax_blas_ok = no; then |
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168 AC_CHECK_LIB(complib.sgimath, $sgemm, |
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169 [ax_blas_ok=yes; BLAS_LIBS="-lcomplib.sgimath"]) |
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170 fi |
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171 |
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172 # BLAS in IBM ESSL library? (requires generic BLAS lib, too) |
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173 if test $ax_blas_ok = no; then |
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174 AC_CHECK_LIB(blas, $sgemm, |
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175 [AC_CHECK_LIB(essl, $sgemm, |
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176 [ax_blas_ok=yes; BLAS_LIBS="-lessl -lblas"], |
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177 [], [-lblas $FLIBS])]) |
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178 fi |
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179 |
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180 # Generic BLAS library? |
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181 if test $ax_blas_ok = no; then |
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182 AC_CHECK_LIB(blas, $sgemm, [ax_blas_ok=yes; BLAS_LIBS="-lblas"]) |
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183 fi |
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184 |
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185 AC_SUBST(BLAS_LIBS) |
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186 |
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187 LIBS="$ax_blas_save_LIBS" |
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188 |
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189 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: |
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190 if test x"$ax_blas_ok" = xyes; then |
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191 ifelse([$1],,AC_DEFINE(HAVE_BLAS,1,[Define if you have a BLAS library.]),[$1]) |
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192 : |
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193 else |
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194 ax_blas_ok=no |
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195 $2 |
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196 fi |
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197 ])dnl AX_BLAS |
