1 # =========================================================================== 2 # http://www.gnu.org/software/autoconf-archive/ax_python_devel.html 3 # =========================================================================== 4 # 5 # SYNOPSIS 6 # 7 # AX_PYTHON_DEVEL([version]) 8 # 9 # DESCRIPTION 10 # 11 # Note: Defines as a precious variable "PYTHON_VERSION". Don't override it 12 # in your configure.ac. 13 # 14 # This macro checks for Python and tries to get the include path to 15 # 'Python.h'. It provides the $(PYTHON_CPPFLAGS) and $(PYTHON_LDFLAGS) 16 # output variables. It also exports $(PYTHON_EXTRA_LIBS) and 17 # $(PYTHON_EXTRA_LDFLAGS) for embedding Python in your code. 18 # 19 # You can search for some particular version of Python by passing a 20 # parameter to this macro, for example ">= '2.3.1'", or "== '2.4'". Please 21 # note that you *have* to pass also an operator along with the version to 22 # match, and pay special attention to the single quotes surrounding the 23 # version number. Don't use "PYTHON_VERSION" for this: that environment 24 # variable is declared as precious and thus reserved for the end-user. 25 # 26 # This macro should work for all versions of Python >= 2.1.0. As an end 27 # user, you can disable the check for the python version by setting the 28 # PYTHON_NOVERSIONCHECK environment variable to something else than the 29 # empty string. 30 # 31 # If you need to use this macro for an older Python version, please 32 # contact the authors. We're always open for feedback. 33 # 34 # LICENSE 35 # 36 # Copyright (c) 2009 Sebastian Huber <sebastian-huber (a] web.de> 37 # Copyright (c) 2009 Alan W. Irwin <irwin (a] beluga.phys.uvic.ca> 38 # Copyright (c) 2009 Rafael Laboissiere <rafael (a] laboissiere.net> 39 # Copyright (c) 2009 Andrew Collier <colliera (a] ukzn.ac.za> 40 # Copyright (c) 2009 Matteo Settenvini <matteo (a] member.fsf.org> 41 # Copyright (c) 2009 Horst Knorr <hk_classes (a] knoda.org> 42 # 43 # This program is free software: you can redistribute it and/or modify it 44 # under the terms of the GNU General Public License as published by the 45 # Free Software Foundation, either version 3 of the License, or (at your 46 # option) any later version. 47 # 48 # This program is distributed in the hope that it will be useful, but 49 # WITHOUT ANY WARRANTY; without even the implied warranty of 50 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 51 # Public License for more details. 52 # 53 # You should have received a copy of the GNU General Public License along 54 # with this program. If not, see <http://www.gnu.org/licenses/>. 55 # 56 # As a special exception, the respective Autoconf Macro's copyright owner 57 # gives unlimited permission to copy, distribute and modify the configure 58 # scripts that are the output of Autoconf when processing the Macro. You 59 # need not follow the terms of the GNU General Public License when using 60 # or distributing such scripts, even though portions of the text of the 61 # Macro appear in them. The GNU General Public License (GPL) does govern 62 # all other use of the material that constitutes the Autoconf Macro. 63 # 64 # This special exception to the GPL applies to versions of the Autoconf 65 # Macro released by the Autoconf Archive. When you make and distribute a 66 # modified version of the Autoconf Macro, you may extend this special 67 # exception to the GPL to apply to your modified version as well. 68 69 #serial 8 70 71 AU_ALIAS([AC_PYTHON_DEVEL], [AX_PYTHON_DEVEL]) 72 AC_DEFUN([AX_PYTHON_DEVEL],[ 73 # 74 # Allow the use of a (user set) custom python version 75 # 76 AC_ARG_VAR([PYTHON_VERSION],[The installed Python 77 version to use, for example '2.3'. This string 78 will be appended to the Python interpreter 79 canonical name.]) 80 81 AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]]) 82 if test -z "$PYTHON"; then 83 AC_MSG_ERROR([Cannot find python$PYTHON_VERSION in your system path]) 84 PYTHON_VERSION="" 85 fi 86 87 # 88 # Check for a version of Python >= 2.1.0 89 # 90 AC_MSG_CHECKING([for a version of Python >= '2.1.0']) 91 ac_supports_python_ver=`$PYTHON -c "import sys; \ 92 ver = sys.version.split ()[[0]]; \ 93 print (ver >= '2.1.0')"` 94 if test "$ac_supports_python_ver" != "True"; then 95 if test -z "$PYTHON_NOVERSIONCHECK"; then 96 AC_MSG_RESULT([no]) 97 AC_MSG_FAILURE([ 98 This version of the AC@&t@_PYTHON_DEVEL macro 99 doesn't work properly with versions of Python before 100 2.1.0. You may need to re-run configure, setting the 101 variables PYTHON_CPPFLAGS, PYTHON_LDFLAGS, PYTHON_SITE_PKG, 102 PYTHON_EXTRA_LIBS and PYTHON_EXTRA_LDFLAGS by hand. 103 Moreover, to disable this check, set PYTHON_NOVERSIONCHECK 104 to something else than an empty string. 105 ]) 106 else 107 AC_MSG_RESULT([skip at user request]) 108 fi 109 else 110 AC_MSG_RESULT([yes]) 111 fi 112 113 # 114 # if the macro parameter ``version'' is set, honour it 115 # 116 if test -n "$1"; then 117 AC_MSG_CHECKING([for a version of Python $1]) 118 ac_supports_python_ver=`$PYTHON -c "import sys; \ 119 ver = sys.version.split ()[[0]]; \ 120 print (ver $1)"` 121 if test "$ac_supports_python_ver" = "True"; then 122 AC_MSG_RESULT([yes]) 123 else 124 AC_MSG_RESULT([no]) 125 AC_MSG_ERROR([this package requires Python $1. 126 If you have it installed, but it isn't the default Python 127 interpreter in your system path, please pass the PYTHON_VERSION 128 variable to configure. See ``configure --help'' for reference. 129 ]) 130 PYTHON_VERSION="" 131 fi 132 fi 133 134 # 135 # Check if you have distutils, else fail 136 # 137 AC_MSG_CHECKING([for the distutils Python package]) 138 ac_distutils_result=`$PYTHON -c "import distutils" 2>&1` 139 if test -z "$ac_distutils_result"; then 140 AC_MSG_RESULT([yes]) 141 else 142 AC_MSG_RESULT([no]) 143 AC_MSG_ERROR([cannot import Python module "distutils". 144 Please check your Python installation. The error was: 145 $ac_distutils_result]) 146 PYTHON_VERSION="" 147 fi 148 149 # 150 # Check for Python include path 151 # 152 AC_MSG_CHECKING([for Python include path]) 153 if test -z "$PYTHON_CPPFLAGS"; then 154 python_path=`$PYTHON -c "import distutils.sysconfig; \ 155 print (distutils.sysconfig.get_python_inc ());"` 156 if test -n "${python_path}"; then 157 python_path="-I$python_path" 158 fi 159 PYTHON_CPPFLAGS=$python_path 160 fi 161 AC_MSG_RESULT([$PYTHON_CPPFLAGS]) 162 AC_SUBST([PYTHON_CPPFLAGS]) 163 164 # 165 # Check for Python library path 166 # 167 AC_MSG_CHECKING([for Python library path]) 168 if test -z "$PYTHON_LDFLAGS"; then 169 # (makes two attempts to ensure we've got a version number 170 # from the interpreter) 171 ac_python_version=`cat<<EOD | $PYTHON - 172 173 # join all versioning strings, on some systems 174 # major/minor numbers could be in different list elements 175 from distutils.sysconfig import * 176 ret = '' 177 for e in get_config_vars ('VERSION'): 178 if (e != None): 179 ret += e 180 print (ret) 181 EOD` 182 183 if test -z "$ac_python_version"; then 184 if test -n "$PYTHON_VERSION"; then 185 ac_python_version=$PYTHON_VERSION 186 else 187 ac_python_version=`$PYTHON -c "import sys; \ 188 print (sys.version[[:3]])"` 189 fi 190 fi 191 192 # Make the versioning information available to the compiler 193 AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"], 194 [If available, contains the Python version number currently in use.]) 195 196 # First, the library directory: 197 ac_python_libdir=`cat<<EOD | $PYTHON - 198 199 # There should be only one 200 import distutils.sysconfig 201 for e in distutils.sysconfig.get_config_vars ('LIBDIR'): 202 if e != None: 203 print (e) 204 break 205 EOD` 206 207 # Before checking for libpythonX.Y, we need to know 208 # the extension the OS we're on uses for libraries 209 # (we take the first one, if there's more than one fix me!): 210 ac_python_soext=`$PYTHON -c \ 211 "import distutils.sysconfig; \ 212 print (distutils.sysconfig.get_config_vars('SO')[[0]])"` 213 214 # Now, for the library: 215 ac_python_soname=`$PYTHON -c \ 216 "import distutils.sysconfig; \ 217 print (distutils.sysconfig.get_config_vars('LDLIBRARY')[[0]])"` 218 219 # Strip away extension from the end to canonicalize its name: 220 ac_python_library=`echo "$ac_python_soname" | sed "s/${ac_python_soext}$//"` 221 222 # This small piece shamelessly adapted from PostgreSQL python macro; 223 # credits goes to momjian, I think. I'd like to put the right name 224 # in the credits, if someone can point me in the right direction... ? 225 # 226 if test -n "$ac_python_libdir" -a -n "$ac_python_library" \ 227 -a x"$ac_python_library" != x"$ac_python_soname" 228 then 229 # use the official shared library 230 ac_python_library=`echo "$ac_python_library" | sed "s/^lib//"` 231 PYTHON_LDFLAGS="-L$ac_python_libdir -l$ac_python_library" 232 else 233 # old way: use libpython from python_configdir 234 ac_python_libdir=`$PYTHON -c \ 235 "from distutils.sysconfig import get_python_lib as f; \ 236 import os; \ 237 print (os.path.join(f(plat_specific=1, standard_lib=1), 'config'));"` 238 PYTHON_LDFLAGS="-L$ac_python_libdir -lpython$ac_python_version" 239 fi 240 241 if test -z "PYTHON_LDFLAGS"; then 242 AC_MSG_ERROR([ 243 Cannot determine location of your Python DSO. Please check it was installed with 244 dynamic libraries enabled, or try setting PYTHON_LDFLAGS by hand. 245 ]) 246 fi 247 fi 248 AC_MSG_RESULT([$PYTHON_LDFLAGS]) 249 AC_SUBST([PYTHON_LDFLAGS]) 250 251 # 252 # Check for site packages 253 # 254 AC_MSG_CHECKING([for Python site-packages path]) 255 if test -z "$PYTHON_SITE_PKG"; then 256 PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \ 257 print (distutils.sysconfig.get_python_lib(0,0));"` 258 fi 259 AC_MSG_RESULT([$PYTHON_SITE_PKG]) 260 AC_SUBST([PYTHON_SITE_PKG]) 261 262 # 263 # libraries which must be linked in when embedding 264 # 265 AC_MSG_CHECKING(python extra libraries) 266 if test -z "$PYTHON_EXTRA_LIBS"; then 267 PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \ 268 conf = distutils.sysconfig.get_config_var; \ 269 print (conf('LOCALMODLIBS') + ' ' + conf('LIBS'))"` 270 fi 271 AC_MSG_RESULT([$PYTHON_EXTRA_LIBS]) 272 AC_SUBST(PYTHON_EXTRA_LIBS) 273 274 # 275 # linking flags needed when embedding 276 # 277 AC_MSG_CHECKING(python extra linking flags) 278 if test -z "$PYTHON_EXTRA_LDFLAGS"; then 279 PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "import distutils.sysconfig; \ 280 conf = distutils.sysconfig.get_config_var; \ 281 print (conf('LINKFORSHARED'))"` 282 fi 283 AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS]) 284 AC_SUBST(PYTHON_EXTRA_LDFLAGS) 285 286 # 287 # final check to see if everything compiles alright 288 # 289 AC_MSG_CHECKING([consistency of all components of python development environment]) 290 # save current global flags 291 ac_save_LIBS="$LIBS" 292 ac_save_CPPFLAGS="$CPPFLAGS" 293 LIBS="$ac_save_LIBS $PYTHON_LDFLAGS $PYTHON_EXTRA_LDFLAGS $PYTHON_EXTRA_LIBS" 294 CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS" 295 AC_LANG_PUSH([C]) 296 AC_LINK_IFELSE([ 297 AC_LANG_PROGRAM([[#include <Python.h>]], 298 [[Py_Initialize();]]) 299 ],[pythonexists=yes],[pythonexists=no]) 300 AC_LANG_POP([C]) 301 # turn back to default flags 302 CPPFLAGS="$ac_save_CPPFLAGS" 303 LIBS="$ac_save_LIBS" 304 305 AC_MSG_RESULT([$pythonexists]) 306 307 if test ! "x$pythonexists" = "xyes"; then 308 AC_MSG_FAILURE([ 309 Could not link test program to Python. Maybe the main Python library has been 310 installed in some non-standard library path. If so, pass it to configure, 311 via the LDFLAGS environment variable. 312 Example: ./configure LDFLAGS="-L/usr/non-standard-path/python/lib" 313 ============================================================================ 314 ERROR! 315 You probably have to install the development version of the Python package 316 for your distribution. The exact name of this package varies among them. 317 ============================================================================ 318 ]) 319 PYTHON_VERSION="" 320 fi 321 322 # 323 # all done! 324 # 325 ]) 326
