1 | # =========================================================================== |
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2 | # http://www.gnu.org/software/autoconf-archive/ax_python_devel.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_PYTHON_DEVEL([version]) |
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8 | # |
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9 | # DESCRIPTION |
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10 | # |
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11 | # Note: Defines as a precious variable "PYTHON_VERSION". Don't override it |
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12 | # in your configure.ac. |
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13 | # |
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14 | # This macro checks for Python and tries to get the include path to |
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15 | # 'Python.h'. It provides the $(PYTHON_CPPFLAGS) and $(PYTHON_LDFLAGS) |
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16 | # output variables. It also exports $(PYTHON_EXTRA_LIBS) and |
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17 | # $(PYTHON_EXTRA_LDFLAGS) for embedding Python in your code. |
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18 | # |
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19 | # You can search for some particular version of Python by passing a |
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20 | # parameter to this macro, for example ">= '2.3.1'", or "== '2.4'". Please |
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21 | # note that you *have* to pass also an operator along with the version to |
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22 | # match, and pay special attention to the single quotes surrounding the |
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23 | # version number. Don't use "PYTHON_VERSION" for this: that environment |
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24 | # variable is declared as precious and thus reserved for the end-user. |
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25 | # |
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26 | # This macro should work for all versions of Python >= 2.1.0. As an end |
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27 | # user, you can disable the check for the python version by setting the |
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28 | # PYTHON_NOVERSIONCHECK environment variable to something else than the |
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29 | # empty string. |
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30 | # |
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31 | # If you need to use this macro for an older Python version, please |
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32 | # contact the authors. We're always open for feedback. |
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33 | # |
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34 | # LICENSE |
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35 | # |
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36 | # Copyright (c) 2009 Sebastian Huber <sebastian-huber@web.de> |
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37 | # Copyright (c) 2009 Alan W. Irwin <irwin@beluga.phys.uvic.ca> |
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38 | # Copyright (c) 2009 Rafael Laboissiere <rafael@laboissiere.net> |
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39 | # Copyright (c) 2009 Andrew Collier <colliera@ukzn.ac.za> |
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40 | # Copyright (c) 2009 Matteo Settenvini <matteo@member.fsf.org> |
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41 | # Copyright (c) 2009 Horst Knorr <hk_classes@knoda.org> |
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42 | # |
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43 | # This program is free software: you can redistribute it and/or modify it |
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44 | # under the terms of the GNU General Public License as published by the |
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45 | # Free Software Foundation, either version 3 of the License, or (at your |
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46 | # option) any later version. |
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47 | # |
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48 | # This program is distributed in the hope that it will be useful, but |
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49 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
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50 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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51 | # Public License for more details. |
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52 | # |
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53 | # You should have received a copy of the GNU General Public License along |
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54 | # with this program. If not, see <http://www.gnu.org/licenses/>. |
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55 | # |
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56 | # As a special exception, the respective Autoconf Macro's copyright owner |
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57 | # gives unlimited permission to copy, distribute and modify the configure |
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58 | # scripts that are the output of Autoconf when processing the Macro. You |
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59 | # need not follow the terms of the GNU General Public License when using |
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60 | # or distributing such scripts, even though portions of the text of the |
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61 | # Macro appear in them. The GNU General Public License (GPL) does govern |
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62 | # all other use of the material that constitutes the Autoconf Macro. |
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63 | # |
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64 | # This special exception to the GPL applies to versions of the Autoconf |
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65 | # Macro released by the Autoconf Archive. When you make and distribute a |
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66 | # modified version of the Autoconf Macro, you may extend this special |
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67 | # exception to the GPL to apply to your modified version as well. |
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68 | |
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69 | #serial 8 |
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70 | |
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71 | AU_ALIAS([AC_PYTHON_DEVEL], [AX_PYTHON_DEVEL]) |
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72 | AC_DEFUN([AX_PYTHON_DEVEL],[ |
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73 | # |
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74 | # Allow the use of a (user set) custom python version |
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75 | # |
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76 | AC_ARG_VAR([PYTHON_VERSION],[The installed Python |
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77 | version to use, for example '2.3'. This string |
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78 | will be appended to the Python interpreter |
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79 | canonical name.]) |
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80 | |
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81 | AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]]) |
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82 | if test -z "$PYTHON"; then |
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83 | AC_MSG_ERROR([Cannot find python$PYTHON_VERSION in your system path]) |
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84 | PYTHON_VERSION="" |
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85 | fi |
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86 | |
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87 | # |
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88 | # Check for a version of Python >= 2.1.0 |
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89 | # |
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90 | AC_MSG_CHECKING([for a version of Python >= '2.1.0']) |
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91 | ac_supports_python_ver=`$PYTHON -c "import sys; \ |
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92 | ver = sys.version.split ()[[0]]; \ |
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93 | print (ver >= '2.1.0')"` |
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94 | if test "$ac_supports_python_ver" != "True"; then |
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95 | if test -z "$PYTHON_NOVERSIONCHECK"; then |
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96 | AC_MSG_RESULT([no]) |
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97 | AC_MSG_FAILURE([ |
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98 | This version of the AC@&t@_PYTHON_DEVEL macro |
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99 | doesn't work properly with versions of Python before |
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100 | 2.1.0. You may need to re-run configure, setting the |
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101 | variables PYTHON_CPPFLAGS, PYTHON_LDFLAGS, PYTHON_SITE_PKG, |
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102 | PYTHON_EXTRA_LIBS and PYTHON_EXTRA_LDFLAGS by hand. |
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103 | Moreover, to disable this check, set PYTHON_NOVERSIONCHECK |
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104 | to something else than an empty string. |
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105 | ]) |
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106 | else |
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107 | AC_MSG_RESULT([skip at user request]) |
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108 | fi |
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109 | else |
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110 | AC_MSG_RESULT([yes]) |
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111 | fi |
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112 | |
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113 | # |
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114 | # if the macro parameter ``version'' is set, honour it |
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115 | # |
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116 | if test -n "$1"; then |
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117 | AC_MSG_CHECKING([for a version of Python $1]) |
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118 | ac_supports_python_ver=`$PYTHON -c "import sys; \ |
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119 | ver = sys.version.split ()[[0]]; \ |
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120 | print (ver $1)"` |
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121 | if test "$ac_supports_python_ver" = "True"; then |
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122 | AC_MSG_RESULT([yes]) |
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123 | else |
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124 | AC_MSG_RESULT([no]) |
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125 | AC_MSG_ERROR([this package requires Python $1. |
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126 | If you have it installed, but it isn't the default Python |
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127 | interpreter in your system path, please pass the PYTHON_VERSION |
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128 | variable to configure. See ``configure --help'' for reference. |
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129 | ]) |
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130 | PYTHON_VERSION="" |
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131 | fi |
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132 | fi |
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133 | |
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134 | # |
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135 | # Check if you have distutils, else fail |
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136 | # |
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137 | AC_MSG_CHECKING([for the distutils Python package]) |
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138 | ac_distutils_result=`$PYTHON -c "import distutils" 2>&1` |
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139 | if test -z "$ac_distutils_result"; then |
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140 | AC_MSG_RESULT([yes]) |
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141 | else |
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142 | AC_MSG_RESULT([no]) |
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143 | AC_MSG_ERROR([cannot import Python module "distutils". |
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144 | Please check your Python installation. The error was: |
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145 | $ac_distutils_result]) |
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146 | PYTHON_VERSION="" |
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147 | fi |
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148 | |
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149 | # |
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150 | # Check for Python include path |
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151 | # |
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152 | AC_MSG_CHECKING([for Python include path]) |
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153 | if test -z "$PYTHON_CPPFLAGS"; then |
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154 | python_path=`$PYTHON -c "import distutils.sysconfig; \ |
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155 | print (distutils.sysconfig.get_python_inc ());"` |
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156 | if test -n "${python_path}"; then |
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157 | python_path="-I$python_path" |
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158 | fi |
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159 | PYTHON_CPPFLAGS=$python_path |
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160 | fi |
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161 | AC_MSG_RESULT([$PYTHON_CPPFLAGS]) |
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162 | AC_SUBST([PYTHON_CPPFLAGS]) |
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163 | |
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164 | # |
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165 | # Check for Python library path |
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166 | # |
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167 | AC_MSG_CHECKING([for Python library path]) |
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168 | if test -z "$PYTHON_LDFLAGS"; then |
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169 | # (makes two attempts to ensure we've got a version number |
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170 | # from the interpreter) |
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171 | ac_python_version=`cat<<EOD | $PYTHON - |
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172 | |
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173 | # join all versioning strings, on some systems |
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174 | # major/minor numbers could be in different list elements |
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175 | from distutils.sysconfig import * |
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176 | ret = '' |
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177 | for e in get_config_vars ('VERSION'): |
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178 | if (e != None): |
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179 | ret += e |
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180 | print (ret) |
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181 | EOD` |
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182 | |
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183 | if test -z "$ac_python_version"; then |
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184 | if test -n "$PYTHON_VERSION"; then |
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185 | ac_python_version=$PYTHON_VERSION |
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186 | else |
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187 | ac_python_version=`$PYTHON -c "import sys; \ |
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188 | print (sys.version[[:3]])"` |
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189 | fi |
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190 | fi |
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191 | |
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192 | # Make the versioning information available to the compiler |
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193 | AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"], |
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194 | [If available, contains the Python version number currently in use.]) |
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195 | |
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196 | # First, the library directory: |
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197 | ac_python_libdir=`cat<<EOD | $PYTHON - |
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198 | |
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199 | # There should be only one |
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200 | import distutils.sysconfig |
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201 | for e in distutils.sysconfig.get_config_vars ('LIBDIR'): |
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202 | if e != None: |
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203 | print (e) |
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204 | break |
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205 | EOD` |
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206 | |
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207 | # Before checking for libpythonX.Y, we need to know |
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208 | # the extension the OS we're on uses for libraries |
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209 | # (we take the first one, if there's more than one fix me!): |
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210 | ac_python_soext=`$PYTHON -c \ |
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211 | "import distutils.sysconfig; \ |
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212 | print (distutils.sysconfig.get_config_vars('SO')[[0]])"` |
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213 | |
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214 | # Now, for the library: |
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215 | ac_python_soname=`$PYTHON -c \ |
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216 | "import distutils.sysconfig; \ |
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217 | print (distutils.sysconfig.get_config_vars('LDLIBRARY')[[0]])"` |
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218 | |
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219 | # Strip away extension from the end to canonicalize its name: |
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220 | ac_python_library=`echo "$ac_python_soname" | sed "s/${ac_python_soext}$//"` |
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221 | |
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222 | # This small piece shamelessly adapted from PostgreSQL python macro; |
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223 | # credits goes to momjian, I think. I'd like to put the right name |
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224 | # in the credits, if someone can point me in the right direction... ? |
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225 | # |
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226 | if test -n "$ac_python_libdir" -a -n "$ac_python_library" \ |
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227 | -a x"$ac_python_library" != x"$ac_python_soname" |
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228 | then |
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229 | # use the official shared library |
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230 | ac_python_library=`echo "$ac_python_library" | sed "s/^lib//"` |
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231 | PYTHON_LDFLAGS="-L$ac_python_libdir -l$ac_python_library" |
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232 | else |
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233 | # old way: use libpython from python_configdir |
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234 | ac_python_libdir=`$PYTHON -c \ |
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235 | "from distutils.sysconfig import get_python_lib as f; \ |
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236 | import os; \ |
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237 | print (os.path.join(f(plat_specific=1, standard_lib=1), 'config'));"` |
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238 | PYTHON_LDFLAGS="-L$ac_python_libdir -lpython$ac_python_version" |
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239 | fi |
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240 | |
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241 | if test -z "PYTHON_LDFLAGS"; then |
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242 | AC_MSG_ERROR([ |
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243 | Cannot determine location of your Python DSO. Please check it was installed with |
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244 | dynamic libraries enabled, or try setting PYTHON_LDFLAGS by hand. |
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245 | ]) |
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246 | fi |
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247 | fi |
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248 | AC_MSG_RESULT([$PYTHON_LDFLAGS]) |
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249 | AC_SUBST([PYTHON_LDFLAGS]) |
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250 | |
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251 | # |
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252 | # Check for site packages |
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253 | # |
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254 | AC_MSG_CHECKING([for Python site-packages path]) |
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255 | if test -z "$PYTHON_SITE_PKG"; then |
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256 | PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \ |
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257 | print (distutils.sysconfig.get_python_lib(0,0));"` |
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258 | fi |
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259 | AC_MSG_RESULT([$PYTHON_SITE_PKG]) |
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260 | AC_SUBST([PYTHON_SITE_PKG]) |
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261 | |
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262 | # |
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263 | # libraries which must be linked in when embedding |
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264 | # |
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265 | AC_MSG_CHECKING(python extra libraries) |
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266 | if test -z "$PYTHON_EXTRA_LIBS"; then |
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267 | PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \ |
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268 | conf = distutils.sysconfig.get_config_var; \ |
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269 | print (conf('LOCALMODLIBS') + ' ' + conf('LIBS'))"` |
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270 | fi |
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271 | AC_MSG_RESULT([$PYTHON_EXTRA_LIBS]) |
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272 | AC_SUBST(PYTHON_EXTRA_LIBS) |
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273 | |
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274 | # |
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275 | # linking flags needed when embedding |
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276 | # |
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277 | AC_MSG_CHECKING(python extra linking flags) |
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278 | if test -z "$PYTHON_EXTRA_LDFLAGS"; then |
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279 | PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "import distutils.sysconfig; \ |
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280 | conf = distutils.sysconfig.get_config_var; \ |
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281 | print (conf('LINKFORSHARED'))"` |
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282 | fi |
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283 | AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS]) |
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284 | AC_SUBST(PYTHON_EXTRA_LDFLAGS) |
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285 | |
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286 | # |
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287 | # final check to see if everything compiles alright |
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288 | # |
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289 | AC_MSG_CHECKING([consistency of all components of python development environment]) |
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290 | # save current global flags |
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291 | ac_save_LIBS="$LIBS" |
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292 | ac_save_CPPFLAGS="$CPPFLAGS" |
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293 | LIBS="$ac_save_LIBS $PYTHON_LDFLAGS $PYTHON_EXTRA_LDFLAGS $PYTHON_EXTRA_LIBS" |
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294 | CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS" |
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295 | AC_LANG_PUSH([C]) |
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296 | AC_LINK_IFELSE([ |
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297 | AC_LANG_PROGRAM([[#include <Python.h>]], |
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298 | [[Py_Initialize();]]) |
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299 | ],[pythonexists=yes],[pythonexists=no]) |
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300 | AC_LANG_POP([C]) |
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301 | # turn back to default flags |
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302 | CPPFLAGS="$ac_save_CPPFLAGS" |
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303 | LIBS="$ac_save_LIBS" |
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304 | |
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305 | AC_MSG_RESULT([$pythonexists]) |
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306 | |
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307 | if test ! "x$pythonexists" = "xyes"; then |
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308 | AC_MSG_FAILURE([ |
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309 | Could not link test program to Python. Maybe the main Python library has been |
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310 | installed in some non-standard library path. If so, pass it to configure, |
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311 | via the LDFLAGS environment variable. |
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312 | Example: ./configure LDFLAGS="-L/usr/non-standard-path/python/lib" |
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313 | ============================================================================ |
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314 | ERROR! |
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315 | You probably have to install the development version of the Python package |
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316 | for your distribution. The exact name of this package varies among them. |
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317 | ============================================================================ |
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318 | ]) |
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319 | PYTHON_VERSION="" |
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320 | fi |
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321 | |
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322 | # |
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323 | # all done! |
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324 | # |
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325 | ]) |
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