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#!/bin/sh
# Copyright 2008-2014 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
#
# This creates a pkg-config frontend that has the form TARGET-pkg-config
# as this is the utility that autoconf scripts will automatically search
# for when cross-compiling for TARGET. Here we setup the pkg config env
# paths so that the .pc files that are searched and used come from the
# staging directory rather than the host system.
#
#
# Helper functions. So very helpful.
#
msg_to_stderr() { echo "cross-pkg-config: $*" 1>&2 ; }
warn() { msg_to_stderr "warning: $*" ; }
error() {
msg_to_stderr "error: $*"
exit 1
}
#
# Sanity/distro checks
#
MIN_VER="0.24" # needs working PKG_CONFIG_SYSROOT_DIR
if ! pkg-config --atleast-pkgconfig-version ${MIN_VER} ; then
error pkg-config is too old ... upgrade to at least v${MIN_VER}
fi
if [ "$1" = "--cross-pkg-config-install" ] ; then
# --cross-pkg-config-install <sysroot dir> [pkg-config wrapper]
pkg_path="$2"
pkg_config="${3:-$0}"
sed -i.tmp \
-e "s:@CROSS_PKG_CONFIG_INSTALLED@:installed:" \
-e "s:@CROSS_PKG_CONFIG_PATH@:${pkg_path}:" \
"${pkg_config}"
rm -f "${pkg_config}".tmp
chmod a+rx "{$pkg_config}"
exit 0
fi
unset EXTRA_PKG_CONFIG_LIBDIR
if [ -z "${CHOST}" ] ; then
CHOST=${0##*/}
CHOST=${CHOST%-pkg-config}
fi
if [ -z "${SYSROOT}" ] ; then
if [ "@CROSS_PKG_CONFIG_INSTALLED@" = "installed" ] ; then
# Manual install
SYSROOT="@CROSS_PKG_CONFIG_PATH@"
elif [ -n "${ROOT}" ] ; then
# Gentoo
SYSROOT=${ROOT}
elif [ -n "${STAGEDIR}" ] ; then
# uClinux-dist
SYSROOT=${STAGEDIR}
EXTRA_PKG_CONFIG_LIBDIR=${UCLINUX_PKG_CONFIG_LIBDIR}
else
# /usr/<target>
SYSROOT="/usr/${CHOST}"
if [ -z "${CHOST}" ] || [ ! -d "${SYSROOT}" ] ; then
error "Need \$ROOT or \$STAGEDIR set first"
fi
fi
fi
# abort infinite loop due to misconfiguration
[ "${0##*/}" = "pkg-config" ] && error "aborting infinite loop! (make sure to delete uClinux-dist/tools/pkg-config)"
#
# Some distributions pollute the pkg-config environment.
# Time to pull a captain planet on them.
#
unset PKG_CONFIG_PATH
unset PKG_CONFIG_ALLOW_SYSTEM_CFLAGS
unset PKG_CONFIG_ALLOW_SYSTEM_LIBS
#
# Try and figure out the appropriate libdir for this target.
# This logic matches Gentoo's get_libdir which uses $ABI.
#
: ${ABI:=${DEFAULT_ABI:-default}}
var="LIBDIR_${ABI}"
eval libdir=\${${var}}
if [ -z "${libdir}" ] ; then
# Fall back to probing the compiler.
libdir=$(realpath "$(${CC:-${CHOST}-gcc} ${CFLAGS} ${LDFLAGS} -print-file-name=pkgconfig)/..")
# Chopping the basename isn't exactly correct, but it's good enough for now.
libdir=$(basename "${libdir}")
fi
: ${libdir:=lib}
export PKG_CONFIG_SYSTEM_LIBRARY_PATH="/usr/${libdir}:/${libdir}"
#
# Set the pkg-config search paths to our staging directory.
#
export PKG_CONFIG_LIBDIR="${SYSROOT}/usr/${libdir}/pkgconfig:${SYSROOT}/usr/share/pkgconfig"
if [ -n "${EXTRA_PKG_CONFIG_LIBDIR}" ] ; then
PKG_CONFIG_LIBDIR="${EXTRA_PKG_CONFIG_LIBDIR}:${PKG_CONFIG_LIBDIR}"
fi
export PKG_CONFIG_SYSROOT_DIR="${SYSROOT}"
#
# Sanity check the output to catch common errors that do not
# cause failures until much later on.
#
output=$(pkg-config "$@")
ret=$?
# We turn the output into a newline separate string of options, then use grep
# to look for bad -Is and -Ls. Bad -Is and -Ls are ones that point to things
# outside the ${SYSROOT}.
bad_lines=$(echo "${output}" | # Get the pkg-config output.
tr -s ' ' '\n' | # Put each flags on its own line.
grep '^-[LI]' | # Find all -I and -L lines.
grep -v -E "..${SYSROOT}" # Find all things outside the SYSROOT.
)
if [ -n "${bad_lines}" ] ; then
warn "### falling down so here is a dump state ######"
pkg-config --debug "$@" 1>&2
warn "### end of dump ###############################"
warn "### suspicious compile flags dumped here ######"
echo "${bad_lines}"
warn "### end of flag dump ##########################"
error "host -I or -L paths detected: ${output}"
fi
[ -n "${output}" ] && echo "${output}"
exit ${ret}
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