ninja/mac: Don't link c-file-only targets to libstdc++

pylib/gyp/generator/make.py

Index: pylib/gyp/generator/make.py
===================================================================
--- pylib/gyp/generator/make.py	(revision 1718)
+++ pylib/gyp/generator/make.py	(working copy)
@@ -246,6 +246,14 @@
 
 %(make_global_settings)s
 
+CC.target ?= %(CC.target)s
+CFLAGS.target ?= $(CFLAGS)
+CXX.target ?= %(CXX.target)s
+CXXFLAGS.target ?= $(CXXFLAGS)
+LINK.target ?= %(LINK.target)s
+LDFLAGS.target ?= $(LDFLAGS)
+AR.target ?= $(AR)
+
 # C++ apps need to be linked with g++.
 #
 # Note: flock is used to seralize linking. Linking is a memory-intensive
@@ -257,14 +265,6 @@
 # This will allow make to invoke N linker processes as specified in -jN.
 LINK ?= %(flock)s $(builddir)/linker.lock $(CXX.target)
 
-CC.target ?= %(CC.target)s
-CFLAGS.target ?= $(CFLAGS)
-CXX.target ?= %(CXX.target)s
-CXXFLAGS.target ?= $(CXXFLAGS)
-LINK.target ?= %(LINK.target)s
-LDFLAGS.target ?= $(LDFLAGS)
-AR.target ?= $(AR)
-
 # TODO(evan): move all cross-compilation logic to gyp-time so we don't need
 # to replicate this environment fallback in make as well.
 CC.host ?= %(CC.host)s
@@ -2000,11 +2000,11 @@
     'CC.target':   GetEnvironFallback(('CC_target', 'CC'), '$(CC)'),
     'AR.target':   GetEnvironFallback(('AR_target', 'AR'), '$(AR)'),
     'CXX.target':  GetEnvironFallback(('CXX_target', 'CXX'), '$(CXX)'),
-    'LINK.target': GetEnvironFallback(('LD_target', 'LD'), '$(LINK)'),
+    'LINK.target': GetEnvironFallback(('LINK_target', 'LINK'), '$(LINK)'),
     'CC.host':     GetEnvironFallback(('CC_host',), 'gcc'),
     'AR.host':     GetEnvironFallback(('AR_host',), 'ar'),
     'CXX.host':    GetEnvironFallback(('CXX_host',), 'g++'),
-    'LINK.host':   GetEnvironFallback(('LD_host',), 'g++'),
+    'LINK.host':   GetEnvironFallback(('LINK_host',), '$(CXX.host)'),
   })
 
   build_file, _, _ = gyp.common.ParseQualifiedTarget(target_list[0])