Use PKG_CONFIG_LIBDIR to force pkg-config to use sysroot only

build/linux/sysroot_scripts/sysroot-creator.sh

 # Copyright 2014 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 script should not be run directly but sourced by the other
 # scripts (e.g. sysroot-creator-trusty.sh).  Its up to the parent scripts
 # to define certain environment variables: e.g.
 #  DISTRO=ubuntu
 #  DIST=trusty
 #  APT_REPO=http://archive.ubuntu.com/ubuntu
@@ skipping 243 matching lines @@
   # these are linker scripts with absolute pathnames in them
   # which we rewrite here
   lscripts="${INSTALL_ROOT}/usr/lib/x86_64-linux-gnu/libpthread.so \
             ${INSTALL_ROOT}/usr/lib/x86_64-linux-gnu/libc.so"
 
   # Rewrite linker scripts
   sed -i -e 's|/usr/lib/x86_64-linux-gnu/||g'  ${lscripts}
   sed -i -e 's|/lib/x86_64-linux-gnu/||g' ${lscripts}
 
   # This is for chrome's ./build/linux/pkg-config-wrapper
-  # which overwrites PKG_CONFIG_PATH internally
+  # which overwrites PKG_CONFIG_LIBDIR internally
   SubBanner "Move pkgconfig scripts"
   mv ${INSTALL_ROOT}/usr/lib/x86_64-linux-gnu/pkgconfig ${INSTALL_ROOT}/usr/lib/
 
   SubBanner "Adding an additional ld.conf include"
   LD_SO_HACK_CONF="${INSTALL_ROOT}/etc/ld.so.conf.d/zz_hack.conf"
   echo /usr/lib/gcc/x86_64-linux-gnu/4.6 > "$LD_SO_HACK_CONF"
   echo /usr/lib >> "$LD_SO_HACK_CONF"
 }
 
 
 HacksAndPatchesI386() {
   Banner "Misc Hacks & Patches"
   # these are linker scripts with absolute pathnames in them
   # which we rewrite here
   lscripts="${INSTALL_ROOT}/usr/lib/i386-linux-gnu/libpthread.so \
             ${INSTALL_ROOT}/usr/lib/i386-linux-gnu/libc.so"
 
   # Rewrite linker scripts
   sed -i -e 's|/usr/lib/i386-linux-gnu/||g'  ${lscripts}
   sed -i -e 's|/lib/i386-linux-gnu/||g' ${lscripts}
 
   # This is for chrome's ./build/linux/pkg-config-wrapper
-  # which overwrites PKG_CONFIG_PATH internally
+  # which overwrites PKG_CONFIG_LIBDIR internally
   SubBanner "Move pkgconfig scripts"
   mv ${INSTALL_ROOT}/usr/lib/i386-linux-gnu/pkgconfig ${INSTALL_ROOT}/usr/lib/
 
   SubBanner "Adding an additional ld.conf include"
   LD_SO_HACK_CONF="${INSTALL_ROOT}/etc/ld.so.conf.d/zz_hack.conf"
   echo /usr/lib/gcc/i486-linux-gnu/4.6 > "$LD_SO_HACK_CONF"
   echo /usr/lib >> "$LD_SO_HACK_CONF"
 }
 
 
 HacksAndPatchesARM() {
   Banner "Misc Hacks & Patches"
   # these are linker scripts with absolute pathnames in them
   # which we rewrite here
   lscripts="${INSTALL_ROOT}/usr/lib/arm-linux-gnueabihf/libpthread.so \
             ${INSTALL_ROOT}/usr/lib/arm-linux-gnueabihf/libc.so"
 
   # Rewrite linker scripts
   sed -i -e 's|/usr/lib/arm-linux-gnueabihf/||g' ${lscripts}
   sed -i -e 's|/lib/arm-linux-gnueabihf/||g' ${lscripts}
 
   # This is for chrome's ./build/linux/pkg-config-wrapper
-  # which overwrites PKG_CONFIG_PATH internally
+  # which overwrites PKG_CONFIG_LIBDIR internally
   SubBanner "Move pkgconfig files"
   mv ${INSTALL_ROOT}/usr/lib/arm-linux-gnueabihf/pkgconfig \
       ${INSTALL_ROOT}/usr/lib/
 }
 
 
 HacksAndPatchesMips() {
   Banner "Misc Hacks & Patches"
   # these are linker scripts with absolute pathnames in them
   # which we rewrite here
   lscripts="${INSTALL_ROOT}/usr/lib/mipsel-linux-gnu/libpthread.so \
             ${INSTALL_ROOT}/usr/lib/mipsel-linux-gnu/libc.so"
 
   # Rewrite linker scripts
   sed -i -e 's|/usr/lib/mipsel-linux-gnu/||g' ${lscripts}
   sed -i -e 's|/lib/mipsel-linux-gnu/||g' ${lscripts}
 
   # This is for chrome's ./build/linux/pkg-config-wrapper
-  # which overwrites PKG_CONFIG_PATH internally
+  # which overwrites PKG_CONFIG_LIBDIR internally
   SubBanner "Move pkgconfig files"
   mv ${INSTALL_ROOT}/usr/lib/mipsel-linux-gnu/pkgconfig \
       ${INSTALL_ROOT}/usr/lib/
 }
 
 
 InstallIntoSysroot() {
   Banner "Install Libs And Headers Into Jail"
 
   mkdir -p ${BUILD_DIR}/debian-packages
@@ skipping 363 matching lines @@
   echo "    $0 help"
   exit 1
 else
   ChangeDirectory
   if echo $1 | grep -qs "All$"; then
     "$@"
   else
     RunCommand "$@"
   fi
 fi