[gnome-menus] [build] Link the python binding to libpython

[Vincent Untz <vuntz src gnome org>]

commit 9d8e52a9a3e495f1e8e50a61f89510a03a4d31c9
Author: Vincent Untz <vuntz gnome org>
Date:   Thu Oct 1 13:21:45 2009 +0200

    [build] Link the python binding to libpython
    
    Thanks to Frederic Crozat <fcrozat mandriva com> for spotting this.

 acinclude.m4       |   29 -----------------
 m4/python.m4       |   86 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 python/Makefile.am |    2 +-
 3 files changed, 87 insertions(+), 30 deletions(-)
---
diff --git a/m4/python.m4 b/m4/python.m4
new file mode 100644
index 0000000..deb3269
--- /dev/null
+++ b/m4/python.m4
@@ -0,0 +1,86 @@
+dnl a macro to check for ability to create python extensions
+dnl  AM_CHECK_PYTHON_HEADERS([ACTION-IF-POSSIBLE], [ACTION-IF-NOT-POSSIBLE])
+dnl function also defines PYTHON_INCLUDES
+AC_DEFUN([AM_CHECK_PYTHON_HEADERS],
+[AC_REQUIRE([AM_PATH_PYTHON])
+
+AC_SUBST(PYTHON_INCLUDES)
+AC_SUBST(PYTHON_LIBS)
+AC_SUBST(PYTHON_EMBED_LIBS)
+AC_SUBST(PYTHON_LDFLAGS)
+AC_SUBST(PYTHON_CC)
+
+AC_MSG_CHECKING(for headers required to compile python extensions)
+dnl deduce PYTHON_INCLUDES
+py_prefix=`$PYTHON -c "import sys; print sys.prefix"`
+py_exec_prefix=`$PYTHON -c "import sys; print sys.exec_prefix"`
+if test -x "$PYTHON-config"; then
+  PYTHON_INCLUDES=`$PYTHON-config --includes 2>/dev/null`
+else
+  PYTHON_INCLUDES="-I${py_prefix}/include/python${PYTHON_VERSION}"
+  if test "$py_prefix" != "$py_exec_prefix"; then
+    PYTHON_INCLUDES="$PYTHON_INCLUDES -I${py_exec_prefix}/include/python${PYTHON_VERSION}"
+  fi
+fi
+dnl check if the headers exist:
+save_CPPFLAGS="$CPPFLAGS"
+CPPFLAGS="$CPPFLAGS $PYTHON_INCLUDES"
+AC_TRY_CPP([#include <Python.h>],dnl
+[AC_MSG_RESULT(found)
+
+AC_MSG_CHECKING(for python libraries)
+
+
+dnl Check whether python was compiled as shared library
+link_pymodules_libpython=false;
+py_enable_shared=`$PYTHON -c "from distutils.sysconfig import get_config_var; print repr(get_config_var('Py_ENABLE_SHARED'))"`
+if test $py_enable_shared == 1 ; then
+  if test x`uname -s` != xDarwin; then
+      PYTHON_LDFLAGS="-no-undefined"
+      link_pymodules_libpython=true;
+  fi
+fi
+
+dnl use distutils to get some python configuration variables..
+PYTHON_CC=`$PYTHON -c "from distutils import sysconfig; print sysconfig.get_config_var('CC')"`
+PYTHON_LIB_DEPS=`$PYTHON -c "from distutils import sysconfig; print sysconfig.get_config_var('SYSLIBS'), sysconfig.get_config_var('SHLIBS')"`
+PYTHON_LIBDIR=`$PYTHON -c "from distutils import sysconfig; print sysconfig.get_config_var('LIBDIR')"`
+PYTHON_LIBPL=`$PYTHON -c "from distutils import sysconfig; print sysconfig.get_config_var('LIBPL')"`
+
+save_CC="$CC"
+save_LIBS="$LIBS"
+
+PYTHON_EMBED_LIBS="-L${PYTHON_LIBDIR} ${PYTHON_LIB_DEPS} -lpython${PYTHON_VERSION}"
+
+CC="$PYTHON_CC"
+LIBS="$LIBS $PYTHON_EMBED_LIBS"
+AC_TRY_LINK_FUNC(Py_Initialize, dnl
+         [
+            LIBS="$save_LIBS";
+            if $link_pymodules_libpython; then
+                PYTHON_LIBS="$PYTHON_EMBED_LIBS";
+            fi
+            AC_MSG_RESULT([$PYTHON_EMBED_LIBS]);
+            $1], dnl
+[
+
+  PYTHON_EMBED_LIBS="-L${PYTHON_LIBPL} ${PYTHON_LIB_DEPS} -lpython${PYTHON_VERSION}"
+
+  LIBS="$save_LIBS $PYTHON_EMBED_LIBS";
+  AC_TRY_LINK_FUNC(Py_Initialize, dnl
+         [
+            LIBS="$save_LIBS";
+            if $link_pymodules_libpython; then
+                PYTHON_LIBS="$PYTHON_EMBED_LIBS";
+            fi
+            AC_MSG_RESULT([$PYTHON_EMBED_LIBS]);
+            $1], dnl
+         AC_MSG_RESULT(not found); $2)
+])
+CC="$save_CC"
+
+$1],dnl
+[AC_MSG_RESULT(not found)
+$2])
+CPPFLAGS="$save_CPPFLAGS"
+])
diff --git a/python/Makefile.am b/python/Makefile.am
index 8180c53..20c52b2 100644
--- a/python/Makefile.am
+++ b/python/Makefile.am
@@ -15,7 +15,7 @@ gmenudir = $(pyexecdir)
 gmenu_LTLIBRARIES = gmenu.la
 
 gmenu_la_LDFLAGS = -module -avoid-version -fPIC -export-symbols-regex initgmenu
-gmenu_la_LIBADD  = $(GLIB_LIBS) $(top_builddir)/libmenu/libgnome-menu.la
+gmenu_la_LIBADD  = $(GLIB_LIBS) $(PYTHON_LIBS) $(top_builddir)/libmenu/libgnome-menu.la
 gmenu_la_SOURCES = gmenu.c
 
 -include $(top_srcdir)/git.mk