Move m4 macros from acinclude into m4 directory

Use new shout.m4 macro

svn path=/trunk/m4/; revision=4943

m4/xiph_path_python.m4

+dnl local M4 configure macros
+dnl Brendan Cully <brendan@xiph.org>
+dnl $Id: xiph_path_python.m4,v 1.1 2003/06/13 19:22:16 brendan Exp $
+
+# XIPH_PATH_PYTHON(PATH)
+# Search for python in PATH, or in the path if none is given.
+# Defines PYTHON_CPPFLAGS and PYTHON_LIBS if found
+AC_DEFUN([XIPH_PATH_PYTHON],
+  [
+m4_pushdef([xpp_path], [$1])
+
+PYTHON="no"
+
+if test "xpp_path" != "yes"
+then
+  AC_MSG_CHECKING([python])
+  if test -x "xpp_path"
+  then
+    PYTHON="xpp_path"
+  fi
+  AC_MSG_RESULT([$PYTHON])
+else
+  AC_PATH_PROGS([PYTHON], [python python2 python2.3 python2.2])
+fi
+
+m4_popdef([xpp_path])
+
+if test "$PYTHON" != "no"
+then
+  # The library we're linking against
+  PYTHON_LIB="_XIPH_PYTHON_CFG([$PYTHON], [LIBRARY])"
+  
+  # if LIBRARY is nonsensical, bail out
+  if test $? -ne 0 -o -z "$PYTHON_LIB"
+  then
+    AC_MSG_WARN([Could not find library for $PYTHON])
+    break
+  fi
+  # make library linker friendly. This is a hack, but I don't know what's better
+  PYTHON_LIB=`echo "$PYTHON_LIB" | sed 's/lib//;s/\.a.*//;s/\.so.*//;s/\.dylib.*//'`
+
+  # LDFLAGS
+  PYTHON_LDFLAGS="-L[]_XIPH_PYTHON_CFG([$PYTHON], [LIBPL])"
+
+  # Extra libraries required by python
+  PYTHON_EXTRA_LIBS="_XIPH_PYTHON_CFG([$PYTHON], [LIBS])"
+  PYTHON_EXTRA_LIBS="$PYTHON_EXTRA_LIBS _XIPH_PYTHON_CFG([$PYTHON], [SYSLIBS])"
+  PYTHON_EXTRA_LIBS="$PYTHON_EXTRA_LIBS _XIPH_PYTHON_CFG([$PYTHON], [SHLIBS])"
+
+  PYTHON_CPPFLAGS="-I[]_XIPH_PYTHON_CFG([$PYTHON], [INCLUDEPY])"
+
+  # test header and library functionality
+  saved_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="$CPPFLAGS $PYTHON_CPPFLAGS"
+  AC_CHECK_HEADER([Python.h],
+    [
+    saved_LDFLAGS="$LDFLAGS"
+    LDFLAGS="$LDFLAGS $PYTHON_LDFLAGS"
+    AC_CHECK_LIB([$PYTHON_LIB], [Py_Initialize],
+      [PYTHON_LIBS="-l$PYTHON_LIB $PYTHON_EXTRA_LIBS"],
+      [AC_MSG_WARN([Could not link to the python library])],
+      [$PYTHON_EXTRA_LIBS])
+    LDFLAGS="$saved_LDFLAGS"
+    ],
+    [AC_MSG_WARN([Python.h doesn't appear to be usable])])
+  CPPFLAGS="$saved_CPPFLAGS"
+fi
+  ])dnl
+
+# _XIPH_PYTHON_CFG(PYTHONPATH, CFGVAR)
+# Ask python in PYTHONPATH for the definition of CFGVAR
+m4_define([_XIPH_PYTHON_CFG],
+  [`$1 -c 'from distutils.sysconfig import get_config_var; print get_config_var("$2")' | sed 's/None//'`])