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1 dnl @synopsis ACX_BLAS([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) |
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2 dnl |
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3 dnl This macro looks for a library that implements the BLAS |
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4 dnl linear-algebra interface (see http://www.netlib.org/blas/). |
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5 dnl On success, it sets the BLAS_LIBS output variable to |
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6 dnl hold the requisite library linkages. |
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7 dnl |
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8 dnl To link with BLAS, you should link with: |
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9 dnl |
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10 dnl $BLAS_LIBS $LIBS $FLIBS |
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11 dnl |
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12 dnl in that order. FLIBS is the output variable of the |
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13 dnl AC_F77_LIBRARY_LDFLAGS macro (called if necessary by ACX_BLAS), |
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14 dnl and is sometimes necessary in order to link with F77 libraries. |
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15 dnl Users will also need to use AC_F77_DUMMY_MAIN (see the autoconf |
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16 dnl manual), for the same reason. |
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17 dnl |
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18 dnl Many libraries are searched for, from ATLAS to CXML to ESSL. |
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19 dnl The user may also use --with-blas=<lib> in order to use some |
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20 dnl specific BLAS library <lib>. In order to link successfully, |
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21 dnl however, be aware that you will probably need to use the same |
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22 dnl Fortran compiler (which can be set via the F77 env. var.) as |
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23 dnl was used to compile the BLAS library. |
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24 dnl |
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25 dnl ACTION-IF-FOUND is a list of shell commands to run if a BLAS |
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26 dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands |
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27 dnl to run it if it is not found. If ACTION-IF-FOUND is not specified, |
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28 dnl the default action will define HAVE_BLAS. |
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29 dnl |
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30 dnl This macro requires autoconf 2.50 or later. |
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31 dnl |
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32 dnl @version $Id: acx_blas.m4,v 1.2 2001/12/13 01:03:06 simons Exp $ |
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33 dnl @author Steven G. Johnson <stevenj@alum.mit.edu> |
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34 dnl |
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35 AC_DEFUN([ACX_BLAS], [ |
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36 AC_PREREQ(2.50) |
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37 AC_REQUIRE([AC_F77_LIBRARY_LDFLAGS]) |
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38 acx_blas_ok=no |
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39 |
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40 AC_ARG_WITH(blas, |
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41 [AC_HELP_STRING([--with-blas=<lib>], [use BLAS library <lib>])]) |
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42 case $with_blas in |
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43 yes | "") ;; |
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44 no) acx_blas_ok=disable ;; |
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45 -* | */* | *.a | *.so | *.so.* | *.o) BLAS_LIBS="$with_blas" ;; |
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46 *) BLAS_LIBS="-l$with_blas" ;; |
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47 esac |
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48 |
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49 # Get fortran linker names of BLAS functions to check for. |
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50 AC_F77_FUNC(sgemm) |
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51 AC_F77_FUNC(dgemm) |
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52 |
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53 acx_blas_save_LIBS="$LIBS" |
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54 LIBS="$LIBS $FLIBS" |
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55 |
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56 # First, check BLAS_LIBS environment variable |
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57 if test $acx_blas_ok = no; then |
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58 if test "x$BLAS_LIBS" != x; then |
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59 save_LIBS="$LIBS"; LIBS="$BLAS_LIBS $LIBS" |
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60 AC_MSG_CHECKING([for $sgemm in $BLAS_LIBS]) |
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61 AC_TRY_LINK_FUNC($sgemm, [acx_blas_ok=yes], [BLAS_LIBS=""]) |
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62 AC_MSG_RESULT($acx_blas_ok) |
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63 LIBS="$save_LIBS" |
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64 fi |
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65 fi |
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66 |
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67 # BLAS linked to by default? (happens on some supercomputers) |
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68 if test $acx_blas_ok = no; then |
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69 save_LIBS="$LIBS"; LIBS="$LIBS" |
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70 AC_CHECK_FUNC($sgemm, [acx_blas_ok=yes]) |
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71 LIBS="$save_LIBS" |
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72 fi |
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73 |
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74 # BLAS in ATLAS library? (http://math-atlas.sourceforge.net/) |
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75 if test $acx_blas_ok = no; then |
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76 AC_CHECK_LIB(atlas, ATL_xerbla, |
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77 [AC_CHECK_LIB(f77blas, $sgemm, |
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78 [AC_CHECK_LIB(cblas, cblas_dgemm, |
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79 [acx_blas_ok=yes |
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80 BLAS_LIBS="-lcblas -lf77blas -latlas"], |
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81 [], [-lf77blas -latlas])], |
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82 [], [-latlas])]) |
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83 fi |
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84 |
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85 # BLAS in PhiPACK libraries? (requires generic BLAS lib, too) |
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86 if test $acx_blas_ok = no; then |
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87 AC_CHECK_LIB(blas, $sgemm, |
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88 [AC_CHECK_LIB(dgemm, $dgemm, |
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89 [AC_CHECK_LIB(sgemm, $sgemm, |
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90 [acx_blas_ok=yes; BLAS_LIBS="-lsgemm -ldgemm -lblas"], |
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91 [], [-lblas])], |
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92 [], [-lblas])]) |
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93 fi |
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94 |
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95 # BLAS in Alpha CXML library? |
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96 if test $acx_blas_ok = no; then |
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97 AC_CHECK_LIB(cxml, $sgemm, [acx_blas_ok=yes;BLAS_LIBS="-lcxml"]) |
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98 fi |
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99 |
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100 # BLAS in Alpha DXML library? (now called CXML, see above) |
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101 if test $acx_blas_ok = no; then |
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102 AC_CHECK_LIB(dxml, $sgemm, [acx_blas_ok=yes;BLAS_LIBS="-ldxml"]) |
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103 fi |
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104 |
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105 # BLAS in Sun Performance library? |
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106 if test $acx_blas_ok = no; then |
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107 if test "x$GCC" != xyes; then # only works with Sun CC |
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108 AC_CHECK_LIB(sunmath, acosp, |
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109 [AC_CHECK_LIB(sunperf, $sgemm, |
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110 [BLAS_LIBS="-xlic_lib=sunperf -lsunmath" |
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111 acx_blas_ok=yes],[],[-lsunmath])]) |
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112 fi |
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113 fi |
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114 |
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115 # BLAS in SCSL library? (SGI/Cray Scientific Library) |
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116 if test $acx_blas_ok = no; then |
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117 AC_CHECK_LIB(scs, $sgemm, [acx_blas_ok=yes; BLAS_LIBS="-lscs"]) |
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118 fi |
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119 |
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120 # BLAS in SGIMATH library? |
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121 if test $acx_blas_ok = no; then |
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122 AC_CHECK_LIB(complib.sgimath, $sgemm, |
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123 [acx_blas_ok=yes; BLAS_LIBS="-lcomplib.sgimath"]) |
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124 fi |
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125 |
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126 # BLAS in IBM ESSL library? (requires generic BLAS lib, too) |
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127 if test $acx_blas_ok = no; then |
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128 AC_CHECK_LIB(blas, $sgemm, |
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129 [AC_CHECK_LIB(essl, $sgemm, |
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130 [acx_blas_ok=yes; BLAS_LIBS="-lessl -lblas"], |
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131 [], [-lblas $FLIBS])]) |
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132 fi |
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133 |
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134 # Generic BLAS library? |
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135 if test $acx_blas_ok = no; then |
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136 AC_CHECK_LIB(blas, $sgemm, [acx_blas_ok=yes; BLAS_LIBS="-lblas"]) |
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137 fi |
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138 |
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139 AC_SUBST(BLAS_LIBS) |
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140 |
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141 LIBS="$acx_blas_save_LIBS" |
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142 |
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143 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: |
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144 if test x"$acx_blas_ok" = xyes; then |
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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 : |
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147 else |
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148 acx_blas_ok=no |
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149 $2 |
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150 fi |
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151 ])dnl ACX_BLAS |
