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