automake based project

git-svn-id: https://recordmydesktop.svn.sourceforge.net/svnroot/recordmydesktop/trunk@70 f606c939-3180-4ac9-a4b8-4b8779d57d0a

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+dnl as-python.m4 0.1.0
+dnl autostars m4 macro for python checks
+
+dnl From Andrew Dalke
+dnl Updated by James Henstridge
+dnl Updated by Andy Wingo to loop through possible pythons
+dnl Updated by Thomas Vander Stichele to check for presence of packages/modules
+
+dnl $Id: as-python.m4,v 1.1 2006-09-25 07:45:20 iovar Exp $
+
+# AS_PATH_PYTHON([MINIMUM-VERSION])
+
+# Adds support for distributing Python modules and packages.  To
+# install modules, copy them to $(pythondir), using the python_PYTHON
+# automake variable.  To install a package with the same name as the
+# automake package, install to $(pkgpythondir), or use the
+# pkgpython_PYTHON automake variable.
+
+# The variables $(pyexecdir) and $(pkgpyexecdir) are provided as
+# locations to install python extension modules (shared libraries).
+# Another macro is required to find the appropriate flags to compile
+# extension modules.
+
+# If your package is configured with a different prefix to python,
+# users will have to add the install directory to the PYTHONPATH
+# environment variable, or create a .pth file (see the python
+# documentation for details).
+
+# If the MINIMUM-VERSION argument is passed, AS_PATH_PYTHON will
+# cause an error if the version of python installed on the system
+# doesn't meet the requirement.  MINIMUM-VERSION should consist of
+# numbers and dots only.
+
+# Updated to loop over all possible python binaries by Andy Wingo
+# <wingo@pobox.com>
+
+AC_DEFUN([AS_PATH_PYTHON],
+ [
+  dnl Find a version of Python.  I could check for python versions 1.4
+  dnl or earlier, but the default installation locations changed from
+  dnl $prefix/lib/site-python in 1.4 to $prefix/lib/python1.5/site-packages
+  dnl in 1.5, and I don't want to maintain that logic.
+
+  dnl should we do the version check?
+  ifelse([$1],[],
+         [AC_PATH_PROG(PYTHON, python python2.1 python2.0 python1.6 python1.5)],
+         [
+     AC_MSG_NOTICE(Looking for Python version >= $1)
+    changequote(<<, >>)dnl
+    prog="
+import sys, string
+minver = '$1'
+pyver = string.split(sys.version)[0]  # first word is version string
+# split strings by '.'. just compare textually to allow for versions like
+# 2.4.1a0
+minver = string.split(minver, '.')
+pyver = string.split(pyver, '.')
+# we can now do comparisons on the two lists:
+if pyver >= minver:
+	sys.exit(0)
+else:
+	sys.exit(1)"
+    changequote([, ])dnl
+
+    python_good=false
+    for python_candidate in python python2.2 python2.1 python2.0 python2 python1.6 python1.5; do
+      unset PYTHON
+      AC_PATH_PROG(PYTHON, $python_candidate) 1> /dev/null 2> /dev/null
+
+      if test "x$PYTHON" = "x"; then continue; fi
+
+      if $PYTHON -c "$prog" 1>&AC_FD_CC 2>&AC_FD_CC; then
+        AC_MSG_CHECKING(["$PYTHON":])
+	AC_MSG_RESULT([okay])
+        python_good=true
+        break;
+      else
+        dnl clear the cache val
+        unset ac_cv_path_PYTHON
+      fi
+    done
+  ])
+
+  if test "$python_good" != "true"; then
+    AC_MSG_ERROR([No suitable version of python found])
+  fi
+
+  AC_MSG_CHECKING([local Python configuration])
+
+  dnl Query Python for its version number.  Getting [:3] seems to be
+  dnl the best way to do this; it's what "site.py" does in the standard
+  dnl library.  Need to change quote character because of [:3]
+
+  AC_SUBST(PYTHON_VERSION)
+  changequote(<<, >>)dnl
+  PYTHON_VERSION=`$PYTHON -c "import sys; print sys.version[:3]"`
+  changequote([, ])dnl
+
+
+  dnl Use the values of $prefix and $exec_prefix for the corresponding
+  dnl values of PYTHON_PREFIX and PYTHON_EXEC_PREFIX.  These are made
+  dnl distinct variables so they can be overridden if need be.  However,
+  dnl general consensus is that you shouldn't need this ability.
+
+  AC_SUBST(PYTHON_PREFIX)
+  PYTHON_PREFIX='${prefix}'
+
+  AC_SUBST(PYTHON_EXEC_PREFIX)
+  PYTHON_EXEC_PREFIX='${exec_prefix}'
+
+  dnl At times (like when building shared libraries) you may want
+  dnl to know which OS platform Python thinks this is.
+
+  AC_SUBST(PYTHON_PLATFORM)
+  PYTHON_PLATFORM=`$PYTHON -c "import sys; print sys.platform"`
+
+
+  dnl Set up 4 directories:
+
+  dnl pythondir -- where to install python scripts.  This is the
+  dnl   site-packages directory, not the python standard library
+  dnl   directory like in previous automake betas.  This behaviour
+  dnl   is more consistent with lispdir.m4 for example.
+  dnl
+  dnl Also, if the package prefix isn't the same as python's prefix,
+  dnl then the old $(pythondir) was pretty useless.
+
+  AC_SUBST(pythondir)
+  pythondir=$PYTHON_PREFIX"/lib/python"$PYTHON_VERSION/site-packages
+
+  dnl pkgpythondir -- $PACKAGE directory under pythondir.  Was
+  dnl   PYTHON_SITE_PACKAGE in previous betas, but this naming is
+  dnl   more consistent with the rest of automake.
+  dnl   Maybe this should be put in python.am?
+
+  AC_SUBST(pkgpythondir)
+  pkgpythondir=\${pythondir}/$PACKAGE
+
+  dnl pyexecdir -- directory for installing python extension modules
+  dnl   (shared libraries)  Was PYTHON_SITE_EXEC in previous betas.
+
+  AC_SUBST(pyexecdir)
+  pyexecdir=$PYTHON_EXEC_PREFIX"/lib/python"$PYTHON_VERSION/site-packages
+
+  dnl pkgpyexecdir -- $(pyexecdir)/$(PACKAGE)
+  dnl   Maybe this should be put in python.am?
+
+  AC_SUBST(pkgpyexecdir)
+  pkgpyexecdir=\${pyexecdir}/$PACKAGE
+
+  AC_MSG_RESULT([looks good])
+])
+
+dnl AS_PYTHON_IMPORT(PACKAGE/MODULE, [ACTION-IF-FOUND, [ACTION-IF-NOT-FOUND, [PREAMBLE, [POSTAMBLE]]]])
+dnl Try to import the given PACKAGE/MODULE
+
+AC_DEFUN([AS_PYTHON_IMPORT],
+[
+  dnl Check if we can import a given module.
+  dnl Requires AS_PATH_PYTHON to be called before.
+
+  AC_MSG_CHECKING([for python module $1])
+
+  prog="
+import sys
+
+try:
+    $4
+    import $1
+    $5
+    sys.exit(0)
+except ImportError:
+    sys.exit(1)
+except SystemExit:
+    raise
+except Exception, e:
+    print '  Error while trying to import $1:'
+    print '    %r: %s' % (e, e)
+    sys.exit(1)"
+
+if $PYTHON -c "$prog" 1>&AC_FD_CC 2>&AC_FD_CC
+then
+    AC_MSG_RESULT(found)
+    ifelse([$2], , :, [$2])
+else
+    AC_MSG_RESULT(not found)
+    ifelse([$3], , :, [$3])
+fi
+])
+
+dnl a macro to check for ability to create python extensions
+dnl  AM_CHECK_PYTHON_HEADERS([ACTION-IF-POSSIBLE], [ACTION-IF-NOT-POSSIBLE])
+dnl function also defines PYTHON_INCLUDES
+AC_DEFUN([AM_CHECK_PYTHON_HEADERS],
+ [
+  AC_REQUIRE([AM_PATH_PYTHON])
+  AC_MSG_CHECKING(for headers required to compile python extensions)
+
+  dnl deduce PYTHON_INCLUDES
+  py_prefix=`$PYTHON -c "import sys; print sys.prefix"`
+  py_exec_prefix=`$PYTHON -c "import sys; print sys.exec_prefix"`
+  PYTHON_INCLUDES="-I${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
+  AC_SUBST(PYTHON_INCLUDES)
+
+  dnl check if the headers exist:
+  save_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="$CPPFLAGS $PYTHON_INCLUDES"
+AC_TRY_CPP([#include <Python.h>],dnl
+[AC_MSG_RESULT(found)
+$1],dnl
+[AC_MSG_RESULT(not found)
+$2])
+CPPFLAGS="$save_CPPFLAGS"
+])