1#!/bin/bash
2# Copyright (c) 2010 The Chromium Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5
6# This program wraps around pkg-config to generate the correct include and
7# library paths when cross-compiling using a sysroot.
8# The assumption is that the sysroot contains the .pc files in usr/lib/pkgconfig
9# and usr/share/pkgconfig (relative to the sysroot) and that they output paths
10# relative to some parent path of the sysroot.
11# This assumption is valid for a range of sysroots, in particular: a
12# LSB-compliant root filesystem mounted at the sysroot, and a board build
13# directory of a Chromium OS chroot.
14
15root="$1"
16if [ -z "$root" ]
17then
18  echo "usage: $0 /path/to/sysroot [pkg-config-arguments] package" >&2
19  exit 1
20fi
21
22rewrite=`dirname $0`/rewrite_dirs.py
23package=${!#}
24
25shift
26config_path=$root/usr/lib/pkgconfig:$root/usr/share/pkgconfig
27set -e
28# Some sysroots, like the Chromium OS ones, may generate paths that are not
29# relative to the sysroot. For example,
30# /path/to/chroot/build/x86-generic/usr/lib/pkgconfig/pkg.pc may have all paths
31# relative to /path/to/chroot (i.e. prefix=/build/x86-generic/usr) instead of
32# relative to /path/to/chroot/build/x86-generic (i.e prefix=/usr).
33# To support this correctly, it's necessary to extract the prefix to strip from
34# pkg-config's |prefix| variable.
35prefix=`PKG_CONFIG_PATH=$config_path pkg-config --variable=prefix "$package" | sed -e 's|/usr$||'`
36result=`PKG_CONFIG_PATH=$config_path pkg-config "$@"`
37echo "$result"| $rewrite --sysroot "$root" --strip-prefix "$prefix"
38