Add m4/ subdirectory with autoconf macros.

The m4/ subdirectory contains autoconf macro files used during the build
process.  This directory supplements the macros provided by the
installed autoconf and automake tools.

1 files changed, 119 insertions, 0 deletions

diff --git a/m4/python.m4 b/m4/python.m4
new file mode 100644
index 000000000..de9015465
--- /dev/null
+++ b/m4/python.m4
@@ -0,0 +1,119 @@
+dnl This file is based on acinclude.m4 from gnome-python-2.20.0.
+
+dnl this one is commonly used with AM_PATH_PYTHONDIR ...
+dnl AM_CHECK_PYMOD(MODNAME [,SYMBOL [,ACTION-IF-FOUND [,ACTION-IF-NOT-FOUND]]])
+dnl Check if a module containing a given symbol is visible to python.
+AC_DEFUN([AM_CHECK_PYMOD],
+[AC_REQUIRE([AM_PATH_PYTHON])
+py_mod_var=`echo $1['_']$2 | sed 'y%./+-%__p_%'`
+AC_MSG_CHECKING(for ifelse([$2],[],,[$2 in ])python module $1)
+AC_CACHE_VAL(py_cv_mod_$py_mod_var, [
+ifelse([$2],[], [prog="
+import sys
+try:
+        import $1
+except ImportError:
+        sys.exit(1)
+except:
+        sys.exit(0)
+sys.exit(0)"], [prog="
+import $1
+$1.$2"])
+if $PYTHON -c "$prog" 1>&AC_FD_CC 2>&AC_FD_CC
+  then
+    eval "py_cv_mod_$py_mod_var=yes"
+  else
+    eval "py_cv_mod_$py_mod_var=no"
+  fi
+])
+py_val=`eval "echo \`echo '$py_cv_mod_'$py_mod_var\`"`
+if test "x$py_val" != xno; then
+  AC_MSG_RESULT(yes)
+  ifelse([$3], [],, [$3
+])dnl
+else
+  AC_MSG_RESULT(no)
+  ifelse([$4], [],, [$4
+])dnl
+fi
+])
+
+dnl a macro to check for ability to create python extensions
+dnl  AM_CHECK_PYTHON_HEADERS([ACTION-IF-POSSIBLE], [ACTION-IF-NOT-POSSIBLE])
+dnl function also defines PYTHON_INCLUDES
+AC_DEFUN([AM_CHECK_PYTHON_HEADERS],
+[AC_REQUIRE([AM_PATH_PYTHON])
+
+AC_SUBST(PYTHON_INCLUDES)
+AC_SUBST(PYTHON_LIBS)
+AC_SUBST(PYTHON_EMBED_LIBS)
+AC_SUBST(PYTHON_LDFLAGS)
+
+AC_MSG_CHECKING(for headers required to compile python extensions)
+dnl deduce PYTHON_INCLUDES
+py_prefix=`$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 $PYTHON_INCLUDES"
+AC_TRY_CPP([#include <Python.h>],dnl
+[AC_MSG_RESULT(found)
+
+AC_MSG_CHECKING(for python libraries)
+
+dnl Check whether python was compiled as shared library
+link_pymodules_libpython=false;
+if egrep "^#define Py_ENABLE_SHARED" "${py_exec_prefix}/include/python${PYTHON_VERSION}/pyconfig.h" > /dev/null ; then
+  if test x`uname -s` != xDarwin; then
+      PYTHON_LDFLAGS="-no-undefined"
+      link_pymodules_libpython=true;
+  fi
+fi
+
+dnl use distutils to get some python configuration variables..
+PYTHON_LIB_DEPS=`$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_LIBS="$LIBS"
+
+PYTHON_EMBED_LIBS="-L${PYTHON_LIBDIR} ${PYTHON_LIB_DEPS} -lpython${PYTHON_VERSION}"
+
+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)
+])
+
+$1],dnl
+[AC_MSG_RESULT(not found)
+$2])
+CPPFLAGS="$save_CPPFLAGS"
+])