#!/bin/sh
# Copyright 2008-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

usage() {
	cat <<-EOF
	Usage: cross-fix-root <sysroot> <cross-bindir> <cross-prefix>
	       cross-fix-root <cross-prefix>
	       cross-fix-root # takes settings from env

	Environment variables:
	  CROSS_COMPILE=<cross-prefix>
	  (SYSROOT|ROOT|STAGEDIR)=<sysroot>

	Description:
	  Fix library perms and mung paths in libtool linker scripts & random -config
	  scripts to point to our SYSROOT directory.  Add symlinks for the -config
	  with cross-compiler prefixes as autotool packages will search for them first
	  when cross-compiling.
	EOF
	exit 1
}

LIBDIR="usr/lib"
SYSROOT=${SYSROOT:-${ROOT:-${STAGEDIR}}}
CROSS_BINDIR=""
if [ -n "${ROOTDIR}" ] ; then
	# uClinux-dist mojo
	CROSS_BINDIR="${ROOTDIR}/tools"
fi
CROSS_PREFIX=${CROSS_COMPILE}
case $# in
	3)
		SYSROOT="$1"
		CROSS_BINDIR="$2"
		CROSS_PREFIX="$3"
		;;
	1)
		if [ -e "/usr/${1:-..........}" ] ; then
			SYSROOT="/usr/$1"
			CROSS_BINDIR="/usr/bin"
			CROSS_PREFIX="$1-"
		else
			usage
		fi
		;;
	0) [ -z "${SYSROOT}" ] && usage ;;
	*) usage ;;
esac

cd "${SYSROOT}" || exit 0

if [ -d "${LIBDIR}" ] ; then
	find "./${LIBDIR}/" -name 'lib*.so*' -print0 | xargs -0 -r chmod 755
	find "./${LIBDIR}/" -name 'lib*.la' -o -name 'lib*.a' -print0 | xargs -0 -r chmod 644
	find "./${LIBDIR}/" -name 'lib*.la' -print0 | xargs -0 -r \
		sed -i \
			-e "/^libdir=/s:=.*:='${SYSROOT}/usr/lib':" \
			-e "/^dependency_libs=/s: /usr/lib/: ${SYSROOT}/usr/lib/:g"
fi

# we don't touch .pc files anymore as we require pkg-config 0.23+ and PKG_CONFIG_SYSROOT_DIR

if [ -d usr/bin ] ; then
	find ./usr/bin/ -name '*-config' -print0 | xargs -0 -r \
		sed -i "/^prefix=/s:=.*:='${SYSROOT}/usr':"

	if [ -n "${CROSS_BINDIR}" ] && [ -d "${CROSS_BINDIR}" ] && [ -n "${CROSS_PREFIX}" ] ; then
		cd usr/bin || exit 1
		for config in *-config ; do
			[ -x "${config}" ] || continue # avoid empty globs
			# work around a possible race condition if multiple make jobs
			# are generating the same symlink at the same time.  a `mv`
			# is "atomic" (it uses rename())  while a `ln` is actually
			# unlink() followed by a symlink().
			ln -s "${SYSROOT}/usr/bin/${config}" "${CROSS_BINDIR}/${CROSS_PREFIX}${config}.$$"
			mv "${CROSS_BINDIR}/${CROSS_PREFIX}${config}.$$" "${CROSS_BINDIR}/${CROSS_PREFIX}${config}"
		done
		cd ../..
	fi
fi

exit 0