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_VER],[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                                 #undef HAVE_UINTPTR_T
  21                                 /* we have our own configure tests */
  22                                 #include <Python.h>
  23                         ],[
  24                                 Py_InitModule(NULL, NULL);
  25                         ],[
  26                                 PYTHON_LDFLAGS="$1"
  27                                 PYTHON_CFLAGS="$2"
  28                                 working_python=yes
  29                         ])
  30                 LIBS="$ac_save_LIBS"
  31                 CFLAGS="$ac_save_CFLAGS"
  32         fi
  33 ])
  34
  35 dnl Try to find a Python implementation including header files
  36 dnl AC_SAMBA_PYTHON_DEVEL(RUN-IF-FOUND, RUN-IF-NOT-FOUND)
  37 dnl
  38 dnl Will set the following variables:
  39 dnl $PYTHON
  40 dnl $PYTHON_CONFIG (if found)
  41 dnl $PYTHON_CFLAGS
  42 dnl $PYTHON_LDFLAGS
  43 AC_DEFUN([AC_SAMBA_PYTHON_DEVEL],
  44 [
  45         if test -z "$PYTHON_VER"; then
  46                 AC_PATH_PROGS([PYTHON], [python2.6 python2.5 python2.4 python])
  47         else
  48                 AC_PATH_PROG([PYTHON],[python[$PYTHON_VER]])
  49         fi
  50         if test -z "$PYTHON"; then
  51                 working_python=no
  52                 AC_MSG_WARN([No python found])
  53         fi
  54
  55         dnl assume no working python
  56         working_python=no
  57
  58         if test -z "$PYTHON_VER"; then
  59                 AC_PATH_PROGS([PYTHON_CONFIG], [python2.6-config python2.5-config python2.4-config python-config])
  60         else
  61                 AC_PATH_PROG([PYTHON_CONFIG], [python[$PYTHON_VER]-config])
  62         fi
  63
  64         if test -z "$PYTHON_CONFIG"; then
  65                 AC_MSG_WARN([No python-config found])
  66         else
  67                 TRY_LINK_PYTHON([`$PYTHON_CONFIG --ldflags`], [`$PYTHON_CONFIG --includes`])
  68                 TRY_LINK_PYTHON([`$PYTHON_CONFIG --ldflags`], [`$PYTHON_CONFIG --cflags`])
  69                 if test x$working_python = xno; then
  70                         # It seems the library path isn't included on some systems
  71                         base=`$PYTHON_CONFIG --prefix`
  72                         TRY_LINK_PYTHON([`echo -n -L${base}/lib " "; $PYTHON_CONFIG --ldflags`], [`$PYTHON_CONFIG --includes`])
  73                         TRY_LINK_PYTHON([`echo -n -L${base}/lib " "; $PYTHON_CONFIG --ldflags`], [`$PYTHON_CONFIG --cflags`])
  74                 fi
  75         fi
  76
  77         if test x$PYTHON != x
  78         then
  79                 DISTUTILS_CFLAGS=`$PYTHON -c "from distutils import sysconfig; \
  80                                               print '-I%s -I%s %s' % ( \
  81                                                         sysconfig.get_python_inc(), \
  82                                                         sysconfig.get_python_inc(plat_specific=1), \
  83                                                         sysconfig.get_config_var('CFLAGS'))"`
  84                 DISTUTILS_LDFLAGS=`$PYTHON -c "from distutils import sysconfig; \
  85                                                print '%s %s -lpython%s -L%s %s -L%s' % ( \
  86                                                         sysconfig.get_config_var('LIBS'), \
  87                                                         sysconfig.get_config_var('SYSLIBS'), \
  88                                                         sysconfig.get_config_var('VERSION'), \
  89                                                         sysconfig.get_config_var('LIBDIR'), \
  90                                                         sysconfig.get_config_var('LDFLAGS'), \
  91                                                         sysconfig.get_config_var('LIBPL'))"`
  92                 TRY_LINK_PYTHON($DISTUTILS_LDFLAGS, $DISTUTILS_CFLAGS)
  93
  94                 if `$PYTHON -c "import sys; sys.exit(sys.version_info.__getslice__(0, 2) >= (2, 4))"`
  95                 then
  96                         AC_MSG_WARN([Python ($PYTHON) is too old. At least version 2.4 is required])
  97                         working_python=no
  98                 fi
  99         fi
 100
 101         AC_MSG_CHECKING(working python module support)
 102         if test $working_python = yes; then
 103                 AC_MSG_RESULT([yes])
 104                 $1
 105         else
 106                 AC_MSG_RESULT([no])
 107                 $2
 108         fi
 109 ])
 110
 111