Adds support for the library_dirs key, which appears in the documentation but was never actually im…

pylib/gyp/generator/make.py

 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Notes:
 #
 # This is all roughly based on the Makefile system used by the Linux
 # kernel, but is a non-recursive make -- we put the entire dependency
 # graph in front of make and let it figure it out.
 #
@@ skipping 1400 matching lines @@
             target_postbuilds[configname] = target_postbuild
         else:
           ldflags = config.get('ldflags', [])
           # Compute an rpath for this output if needed.
           if any(dep.endswith('.so') for dep in deps):
             # We want to get the literal string "$ORIGIN" into the link command,
             # so we need lots of escaping.
             ldflags.append(r'-Wl,-rpath=\$$ORIGIN/lib.%s/' % self.toolset)
             ldflags.append(r'-Wl,-rpath-link=\$(builddir)/lib.%s/' %
                            self.toolset)
+        library_dirs = spec.get('library_dirs', [])
+        library_dirs += config.get('library_dirs', [])
+        ldflags += [('-L%s' % library_dir) for library_dir in library_dirs]
         self.WriteList(ldflags, 'LDFLAGS_%s' % configname)
       libraries = spec.get('libraries')
       if libraries:
         # Remove duplicate entries
         libraries = gyp.common.uniquer(libraries)
         if self.flavor == 'mac':
           libraries = self.xcode_settings.AdjustLibraries(libraries)
       self.WriteList(libraries, 'LIBS')
       self.WriteLn('%s: GYP_LDFLAGS := $(LDFLAGS_$(BUILDTYPE))' %
           QuoteSpaces(self.output_binary))
@@ skipping 692 matching lines @@
     root_makefile.write("  include " + include_file + "\n")
     root_makefile.write("endif\n")
   root_makefile.write('\n')
 
   if generator_flags.get('auto_regeneration', True):
     WriteAutoRegenerationRule(params, root_makefile, makefile_name, build_files)
 
   root_makefile.write(SHARED_FOOTER)
 
   root_makefile.close()