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#!/bin/bash
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# This program wraps around pkg-config to generate the correct include and
# library paths when cross-compiling using a sysroot.
# The assumption is that the sysroot contains the .pc files in usr/lib/pkgconfig
# and usr/share/pkgconfig (relative to the sysroot) and that they output paths
# relative to some parent path of the sysroot.
# This assumption is valid for a range of sysroots, in particular: a
# LSB-compliant root filesystem mounted at the sysroot, and a board build
# directory of a Chromium OS chroot.
root="$1"
shift
target_arch="$1"
shift
if [ -z "$root" -o -z "$target_arch" ]
then
echo "usage: $0 /path/to/sysroot target_arch [pkg-config-arguments] package" >&2
exit 1
fi
if [ "$target_arch" = "x64" ]
then
libpath="lib64"
else
libpath="lib"
fi
rewrite=`dirname $0`/rewrite_dirs.py
package=${!#}
config_path=$root/usr/$libpath/pkgconfig:$root/usr/share/pkgconfig
set -e
# Some sysroots, like the Chromium OS ones, may generate paths that are not
# relative to the sysroot. For example,
# /path/to/chroot/build/x86-generic/usr/lib/pkgconfig/pkg.pc may have all paths
# relative to /path/to/chroot (i.e. prefix=/build/x86-generic/usr) instead of
# relative to /path/to/chroot/build/x86-generic (i.e prefix=/usr).
# To support this correctly, it's necessary to extract the prefix to strip from
# pkg-config's |prefix| variable.
prefix=`PKG_CONFIG_PATH=$config_path pkg-config --variable=prefix "$package" | sed -e 's|/usr$||'`
result=`PKG_CONFIG_PATH=$config_path pkg-config "$@"`
echo "$result"| $rewrite --sysroot "$root" --strip-prefix "$prefix"
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