ax_python_devel.m4 revision 246827
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@web.de> 37# Copyright (c) 2009 Alan W. Irwin <irwin@beluga.phys.uvic.ca> 38# Copyright (c) 2009 Rafael Laboissiere <rafael@laboissiere.net> 39# Copyright (c) 2009 Andrew Collier <colliera@ukzn.ac.za> 40# Copyright (c) 2009 Matteo Settenvini <matteo@member.fsf.org> 41# Copyright (c) 2009 Horst Knorr <hk_classes@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 71AU_ALIAS([AC_PYTHON_DEVEL], [AX_PYTHON_DEVEL]) 72AC_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([ 98This version of the AC@&t@_PYTHON_DEVEL macro 99doesn't work properly with versions of Python before 1002.1.0. You may need to re-run configure, setting the 101variables PYTHON_CPPFLAGS, PYTHON_LDFLAGS, PYTHON_SITE_PKG, 102PYTHON_EXTRA_LIBS and PYTHON_EXTRA_LDFLAGS by hand. 103Moreover, to disable this check, set PYTHON_NOVERSIONCHECK 104to 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 $1. 126If you have it installed, but it isn't the default Python 127interpreter in your system path, please pass the PYTHON_VERSION 128variable to configure. See ``configure --help'' for reference. 129]) 130 PYTHON_VERSION="" 131 fi 132 fi 133 134 # 135 # Check if you have distutils, else fail 136 # 137 AC_MSG_CHECKING([for the distutils Python package]) 138 ac_distutils_result=`$PYTHON -c "import distutils" 2>&1` 139 if test -z "$ac_distutils_result"; then 140 AC_MSG_RESULT([yes]) 141 else 142 AC_MSG_RESULT([no]) 143 AC_MSG_ERROR([cannot import Python module "distutils". 144Please check your Python installation. The error was: 145$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 | $PYTHON - 172 173# join all versioning strings, on some systems 174# major/minor numbers could be in different list elements 175from distutils.sysconfig import * 176ret = '' 177for e in get_config_vars ('VERSION'): 178 if (e != None): 179 ret += e 180print (ret) 181EOD 182` 183 184 if test -z "$ac_python_version"; then 185 if test -n "$PYTHON_VERSION"; then 186 ac_python_version=$PYTHON_VERSION 187 else 188 ac_python_version=`$PYTHON -c "import sys; \ 189 print (sys.version[[:3]])"` 190 fi 191 fi 192 193 # Make the versioning information available to the compiler 194 AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"], 195 [If available, contains the Python version number currently in use.]) 196 197 # First, the library directory: 198 ac_python_libdir=`cat<<EOD | $PYTHON - 199 200# There should be only one 201import distutils.sysconfig 202for e in distutils.sysconfig.get_config_vars ('LIBDIR'): 203 if e != None: 204 print (e) 205 break 206EOD 207` 208 209 # Before checking for libpythonX.Y, we need to know 210 # the extension the OS we're on uses for libraries 211 # (we take the first one, if there's more than one fix me!): 212 ac_python_soext=`$PYTHON -c \ 213 "import distutils.sysconfig; \ 214 print (distutils.sysconfig.get_config_vars('SO')[[0]])"` 215 216 # Now, for the library: 217 ac_python_soname=`$PYTHON -c \ 218 "import distutils.sysconfig; \ 219 print (distutils.sysconfig.get_config_vars('LDLIBRARY')[[0]])"` 220 221 # Strip away extension from the end to canonicalize its name: 222 ac_python_library=`echo "$ac_python_soname" | sed "s/${ac_python_soext}$//"` 223 224 # This small piece shamelessly adapted from PostgreSQL python macro; 225 # credits goes to momjian, I think. I'd like to put the right name 226 # in the credits, if someone can point me in the right direction... ? 227 # 228 if test -n "$ac_python_libdir" -a -n "$ac_python_library" \ 229 -a x"$ac_python_library" != x"$ac_python_soname" 230 then 231 # use the official shared library 232 ac_python_library=`echo "$ac_python_library" | sed "s/^lib//"` 233 PYTHON_LDFLAGS="-L$ac_python_libdir -l$ac_python_library" 234 else 235 # old way: use libpython from python_configdir 236 ac_python_libdir=`$PYTHON -c \ 237 "from distutils.sysconfig import get_python_lib as f; \ 238 import os; \ 239 print (os.path.join(f(plat_specific=1, standard_lib=1), 'config'));"` 240 PYTHON_LDFLAGS="-L$ac_python_libdir -lpython$ac_python_version" 241 fi 242 243 if test -z "PYTHON_LDFLAGS"; then 244 AC_MSG_ERROR([ 245 Cannot determine location of your Python DSO. Please check it was installed with 246 dynamic libraries enabled, or try setting PYTHON_LDFLAGS by hand. 247 ]) 248 fi 249 fi 250 AC_MSG_RESULT([$PYTHON_LDFLAGS]) 251 AC_SUBST([PYTHON_LDFLAGS]) 252 253 # 254 # Check for site packages 255 # 256 AC_MSG_CHECKING([for Python site-packages path]) 257 if test -z "$PYTHON_SITE_PKG"; then 258 PYTHON_SITE_PKG=`$PYTHON -c "import distutils.sysconfig; \ 259 print (distutils.sysconfig.get_python_lib(1,0));"` 260 fi 261 AC_MSG_RESULT([$PYTHON_SITE_PKG]) 262 AC_SUBST([PYTHON_SITE_PKG]) 263 264 # 265 # libraries which must be linked in when embedding 266 # 267 AC_MSG_CHECKING(python extra libraries) 268 if test -z "$PYTHON_EXTRA_LIBS"; then 269 PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \ 270 conf = distutils.sysconfig.get_config_var; \ 271 print (conf('LOCALMODLIBS') + ' ' + conf('LIBS'))"` 272 fi 273 AC_MSG_RESULT([$PYTHON_EXTRA_LIBS]) 274 AC_SUBST(PYTHON_EXTRA_LIBS) 275 276 # 277 # linking flags needed when embedding 278 # 279 AC_MSG_CHECKING(python extra linking flags) 280 if test -z "$PYTHON_EXTRA_LDFLAGS"; then 281 PYTHON_EXTRA_LDFLAGS=`$PYTHON -c "import distutils.sysconfig; \ 282 conf = distutils.sysconfig.get_config_var; \ 283 print (conf('LINKFORSHARED'))"` 284 fi 285 AC_MSG_RESULT([$PYTHON_EXTRA_LDFLAGS]) 286 AC_SUBST(PYTHON_EXTRA_LDFLAGS) 287 288 # 289 # final check to see if everything compiles alright 290 # 291 AC_MSG_CHECKING([consistency of all components of python development environment]) 292 # save current global flags 293 ac_save_LIBS="$LIBS" 294 ac_save_CPPFLAGS="$CPPFLAGS" 295 LIBS="$ac_save_LIBS $PYTHON_LDFLAGS $PYTHON_EXTRA_LDFLAGS $PYTHON_EXTRA_LIBS" 296 CPPFLAGS="$ac_save_CPPFLAGS $PYTHON_CPPFLAGS" 297 AC_LANG_PUSH([C]) 298 AC_LINK_IFELSE([ 299 AC_LANG_PROGRAM([[#include <Python.h>]], 300 [[Py_Initialize();]]) 301 ],[pythonexists=yes],[pythonexists=no]) 302 AC_LANG_POP([C]) 303 # turn back to default flags 304 CPPFLAGS="$ac_save_CPPFLAGS" 305 LIBS="$ac_save_LIBS" 306 307 AC_MSG_RESULT([$pythonexists]) 308 309 if test ! "x$pythonexists" = "xyes"; then 310 AC_MSG_FAILURE([ 311 Could not link test program to Python. Maybe the main Python library has been 312 installed in some non-standard library path. If so, pass it to configure, 313 via the LDFLAGS environment variable. 314 Example: ./configure LDFLAGS="-L/usr/non-standard-path/python/lib" 315 ============================================================================ 316 ERROR! 317 You probably have to install the development version of the Python package 318 for your distribution. The exact name of this package varies among them. 319 ============================================================================ 320 ]) 321 PYTHON_VERSION="" 322 fi 323 324 # 325 # all done! 326 # 327]) 328