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1#!/bin/bash
2# Copyright (c) 2012 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# Additional directories containing .pc files may be specified by setting
15# the PKG_CONFIG_PATH environment variable- these will be prepended to the
16# generated paths.
17
18root="$1"
19shift
20target_arch="$1"
21shift
22libpath="$1"
23shift
24
25if [ -z "$root" -o -z "$target_arch" ]
26then
27  echo "usage: $0 /path/to/sysroot target_arch libdir [pkg-config-arguments] package" >&2
28  exit 1
29fi
30
31if [ "$target_arch" = "x64" ]
32then
33  : ${libpath:="lib64"}
34else
35  : ${libpath:="lib"}
36fi
37
38rewrite=`dirname $0`/rewrite_dirs.py
39package=${!#}
40
41config_path=$root/usr/$libpath/pkgconfig:$root/usr/share/pkgconfig
42
43# prepend any paths specified by the environment
44if [ -n "$PKG_CONFIG_PATH" ]
45then
46  config_path="$PKG_CONFIG_PATH:$config_path"
47fi
48
49set -e
50# Some sysroots, like the Chromium OS ones, may generate paths that are not
51# relative to the sysroot. For example,
52# /path/to/chroot/build/x86-generic/usr/lib/pkgconfig/pkg.pc may have all paths
53# relative to /path/to/chroot (i.e. prefix=/build/x86-generic/usr) instead of
54# relative to /path/to/chroot/build/x86-generic (i.e prefix=/usr).
55# To support this correctly, it's necessary to extract the prefix to strip from
56# pkg-config's |prefix| variable.
57prefix=`PKG_CONFIG_PATH=$config_path pkg-config --variable=prefix "$package" | sed -e 's|/usr$||'`
58result=`PKG_CONFIG_PATH=$config_path pkg-config "$@"`
59echo "$result"| $rewrite --sysroot "$root" --strip-prefix "$prefix"
60