GN: Don't default to using lib64 in PKG_CONFIG_PATH

build/config/linux/pkg-config.py

 # Copyright (c) 2013 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.
 
 import json
 import os
 import subprocess
 import sys
 import re
 from optparse import OptionParser
@@ skipping 34 matching lines @@
 
   sysroot = options.sysroot
   if not sysroot:
     sysroot = ""
 
   # Compute the library path name based on the architecture.
   arch = options.arch
   if sysroot and not arch:
     print "You must specify an architecture via -a if using a sysroot."
     sys.exit(1)
-  if arch == 'x64':
-    libpath = 'lib64'
-  else:
-    libpath = 'lib'
+
+  # In the gyp world this is configurable via the 'system_libdir' variable,
+  # which doesn't seem to have an equivelent in gn yet.
+  # TOOD(sbc): Make this configurable like it is under gyp.
+  libpath = 'lib'
 
   # Add the sysroot path to the environment's PKG_CONFIG_PATH
   config_path = sysroot + '/usr/' + libpath + '/pkgconfig'
   config_path += ':' + sysroot + '/usr/share/pkgconfig'
   if 'PKG_CONFIG_PATH' in os.environ:
     os.environ['PKG_CONFIG_PATH'] += ':' + config_path
   else:
     os.environ['PKG_CONFIG_PATH'] = config_path
 
 
@@ skipping 122 matching lines @@
     # this anyway. Removing it here prevents a bunch of duplicate inclusions on
     # the command line.
     pass
   else:
     cflags.append(flag)
 
 # Output a GN array, the first one is the cflags, the second are the libs. The
 # JSON formatter prints GN compatible lists when everything is a list of
 # strings.
 print json.dumps([includes, cflags, libs, lib_dirs, ldflags])