#!/bin/sh

if test $# = 1 ; then 
  ORIGINAL=$1
else
  echo "Usage: make-patch.sh /path/to/libcharset" 1>&2
  exit 1
fi

if test -f "${ORIGINAL}/lib/localcharset.c" ; then : ; else
  echo "Usage: make-patch.sh /path/to/libcharset" 1>&2
  exit 1
fi

VERSION=$(grep VERSION= "${ORIGINAL}/configure.ac" | sed s/VERSION=//)

echo "# Patch against libcharset version ${VERSION}" > libcharset-glib.patch

for i in localcharset.c ref-add.sin ref-del.sin ; do
  diff -u "${ORIGINAL}/lib/${i}" "${i}" >> libcharset-glib.patch
done

for i in glibc21.m4 codeset.m4 ; do
  diff -u "${ORIGINAL}/m4/${i}" "${i}" >> libcharset-glib.patch
done

diff -u "${ORIGINAL}/include/libcharset.h.in" libcharset.h >> libcharset-glib.patch
diff -u "${ORIGINAL}/include/localcharset.h.in" localcharset.h >> libcharset-glib.patch