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

pylib/gyp/generator/ninja.py

Index: pylib/gyp/generator/ninja.py
===================================================================
--- pylib/gyp/generator/ninja.py	(revision 1630)
+++ pylib/gyp/generator/ninja.py	(working copy)
@@ -768,6 +768,19 @@
         [QuoteShellArgument('-I' + self.GypPathToNinja(i, env), self.flavor)
          for i in include_dirs])
 
+    library_dirs = config.get('library_dirs', [])
+    if self.flavor == 'win':
+      library_dirs = [
+          self.msvs_settings.ConvertVSMacros(library_dir, config_name)
+          for library_dir in library_dirs]
+      self.WriteVariableList('libdirs',
+           [QuoteShellArgument('-LIBPATH:' + self.GypPathToNinja(l), self.flavor)
+           for l in library_dirs])
+    else:
+      self.WriteVariableList('libdirs',
+           [QuoteShellArgument('-L' + self.GypPathToNinja(l), self.flavor)
+           for l in library_dirs])
+
     pch_commands = precompiled_header.GetPchBuildCommands()
     if self.flavor == 'mac':
       self.WriteVariableList('cflags_pch_c',
@@ -1575,18 +1588,19 @@
       restat=True,
       command=(mtime_preserving_solink_base % {
           'suffix': '-Wl,--whole-archive $in $solibs -Wl,--no-whole-archive '
-          '$libs'}))
+          '$libdirs $libs'}))
     master_ninja.rule(
       'solink_module',
       description='SOLINK(module) $lib',
       restat=True,
       command=(mtime_preserving_solink_base % {
-          'suffix': '-Wl,--start-group $in $solibs -Wl,--end-group $libs'}))
+          'suffix': '-Wl,--start-group $in $solibs -Wl,--end-group '
+          '$libdirs $libs'}))
     master_ninja.rule(
       'link',
       description='LINK $out',
       command=('$ld $ldflags -o $out '
-               '-Wl,--start-group $in $solibs -Wl,--end-group $libs'))
+               '-Wl,--start-group $in $solibs -Wl,--end-group $libdirs $libs'))
   elif flavor == 'win':
     master_ninja.rule(
         'alink',
@@ -1608,11 +1622,11 @@
                sys.executable)
     master_ninja.rule('solink', description=dlldesc, command=dllcmd,
                       rspfile='$dll.rsp',
-                      rspfile_content='$libs $in_newline $ldflags',
+                      rspfile_content='$libdirs $libs $in_newline $ldflags',
                       restat=True)
     master_ninja.rule('solink_module', description=dlldesc, command=dllcmd,
                       rspfile='$dll.rsp',
-                      rspfile_content='$libs $in_newline $ldflags',
+                      rspfile_content='$libdirs $libs $in_newline $ldflags',
                       restat=True)
     # Note that ldflags goes at the end so that it has the option of
     # overriding default settings earlier in the command line.
@@ -1627,7 +1641,7 @@
                  '$mt -nologo -manifest $manifests -out:$out.manifest' %
                  (sys.executable, sys.executable, sys.executable)),
         rspfile='$out.rsp',
-        rspfile_content='$in_newline $libs $ldflags')
+        rspfile_content='$in_newline $libdirs $libs $ldflags')
   else:
     master_ninja.rule(
       'objc',
@@ -1678,19 +1692,19 @@
       description='SOLINK $lib, POSTBUILDS',
       restat=True,
       command=(mtime_preserving_solink_base % {
-          'suffix': '$in $solibs $libs$postbuilds'}))
+          'suffix': '$in $solibs $libdirs $libs$postbuilds'}))
     master_ninja.rule(
       'solink_module',
       description='SOLINK(module) $lib, POSTBUILDS',
       restat=True,
       command=(mtime_preserving_solink_base % {
-          'suffix': '$in $solibs $libs$postbuilds'}))
+          'suffix': '$in $solibs $libdirs $libs$postbuilds'}))
 
     master_ninja.rule(
       'link',
       description='LINK $out, POSTBUILDS',
       command=('$ld $ldflags -o $out '
-               '$in $solibs $libs$postbuilds'))
+               '$in $solibs $libdirs $libs$postbuilds'))
     master_ninja.rule(
       'infoplist',
       description='INFOPLIST $out',