m4/check_python.m4

   1 dnl Autoconf macros for finding a Python development environment
   2 dnl
   3 dnl Copyright (C) 2007-2008 Jelmer Vernooij <jelmer@samba.org>
   4 dnl Published under the GNU GPL, v3 or later
   5 dnl
   6 AC_ARG_VAR([PYTHON_VERSION],[The installed Python
   7         version to use, for example '2.3'. This string
   8         will be appended to the Python interpreter
   9         canonical name.])
  10
  11 AC_DEFUN([TRY_LINK_PYTHON],
  12 [
  13         if test $working_python = no; then
  14                 ac_save_LIBS="$LIBS"
  15                 ac_save_CFLAGS="$CFLAGS"
  16                 LIBS="$LIBS $1"
  17                 CFLAGS="$CFLAGS $2"
  18
  19                 AC_TRY_LINK([
  20                                 /* we have our own configure tests */
  21                                 #include <Python.h>
  22                         ],[
  23                                 Py_InitModule(NULL, NULL);
  24                         ],[
  25                                 PYTHON_LDFLAGS="$1"
  26                                 PYTHON_CFLAGS="$2"
  27                                 working_python=yes
  28                         ])
  29                 LIBS="$ac_save_LIBS"
  30                 CFLAGS="$ac_save_CFLAGS"
  31         fi
  32 ])
  33
  34 dnl Try to find a Python implementation including header files
  35 dnl AC_SAMBA_PYTHON_DEVEL(RUN-IF-FOUND, RUN-IF-NOT-FOUND)
  36 dnl
  37 dnl Will set the following variables:
  38 dnl $PYTHON
  39 dnl $PYTHON_CONFIG (if found)
  40 dnl $PYTHON_CFLAGS
  41 dnl $PYTHON_LDFLAGS
  42 AC_DEFUN([AC_SAMBA_PYTHON_DEVEL],
  43 [
  44         if test -z "$PYTHON_VERSION"; then
  45                 AC_PATH_PROGS([PYTHON], [python2.6 python2.5 python2.4 python])
  46         else
  47                 AC_PATH_PROG([PYTHON],[python[$PYTHON_VERSION]])
  48         fi
  49         if test -z "$PYTHON"; then
  50                 working_python=no
  51                 AC_MSG_WARN([No python found])
  52         fi
  53
  54         dnl assume no working python
  55         working_python=no
  56
  57         if test -z "$PYTHON_VERSION"; then
  58                 AC_PATH_PROGS([PYTHON_CONFIG], [python2.6-config python2.5-config python2.4-config python-config])
  59         else
  60                 AC_PATH_PROG([PYTHON_CONFIG], [python[$PYTHON_VERSION]-config])
  61         fi
  62
  63         if test -z "$PYTHON_CONFIG"; then
  64                 AC_MSG_WARN([No python-config found])
  65         else
  66                 TRY_LINK_PYTHON([`$PYTHON_CONFIG --ldflags`], [`$PYTHON_CONFIG --includes`])
  67                 TRY_LINK_PYTHON([`$PYTHON_CONFIG --ldflags`], [`$PYTHON_CONFIG --cflags`])
  68                 if test x$working_python = xno; then
  69                         # It seems the library path isn't included on some systems
  70                         base=`$PYTHON_CONFIG --prefix`
  71                         TRY_LINK_PYTHON([`echo -n -L${base}/lib " "; $PYTHON_CONFIG --ldflags`], [`$PYTHON_CONFIG --includes`])
  72                         TRY_LINK_PYTHON([`echo -n -L${base}/lib " "; $PYTHON_CONFIG --ldflags`], [`$PYTHON_CONFIG --cflags`])
  73                 fi
  74         fi
  75
  76         if test x$PYTHON != x
  77         then
  78                 DISTUTILS_CFLAGS=`$PYTHON -c "from distutils import sysconfig; \
  79                                               print '-I%s -I%s %s' % ( \
  80                                                         sysconfig.get_python_inc(), \
  81                                                         sysconfig.get_python_inc(plat_specific=1), \
  82                                                         sysconfig.get_config_var('CFLAGS'))"`
  83                 DISTUTILS_LDFLAGS=`$PYTHON -c "from distutils import sysconfig; \
  84                                                print '%s %s -lpython%s -L%s %s -L%s' % ( \
  85                                                         sysconfig.get_config_var('LIBS'), \
  86                                                         sysconfig.get_config_var('SYSLIBS'), \
  87                                                         sysconfig.get_config_var('VERSION'), \
  88                                                         sysconfig.get_config_var('LIBDIR'), \
  89                                                         sysconfig.get_config_var('LDFLAGS'), \
  90                                                         sysconfig.get_config_var('LIBPL'))"`
  91                 TRY_LINK_PYTHON($DISTUTILS_LDFLAGS, $DISTUTILS_CFLAGS)
  92         fi
  93
  94         AC_MSG_CHECKING(working python module support)
  95         if test $working_python = yes; then
  96                 AC_MSG_RESULT([yes])
  97                 $1
  98         else
  99                 AC_MSG_RESULT([no])
 100                 $2
 101         fi
 102 ])
 103
 104