Make RelativePath use abspath rather than realpath for the 'path' variable.

pylib/gyp/generator/ninja.py

Index: pylib/gyp/generator/ninja.py
diff --git a/pylib/gyp/generator/ninja.py b/pylib/gyp/generator/ninja.py
index 51c288b2164ff2e2b7aa337302ee946764b17be2..7659930ad134e77d48fb1ae8432a267fc742683c 100644
--- a/pylib/gyp/generator/ninja.py
+++ b/pylib/gyp/generator/ninja.py
@@ -921,6 +921,11 @@ class NinjaWriter(object):
                   os.environ.get('CFLAGS', '').split() + cflags_c)
       cflags_cc = (os.environ.get('CPPFLAGS', '').split() +
                    os.environ.get('CXXFLAGS', '').split() + cflags_cc)
+    elif self.toolset == 'host':
+      cflags_c = (os.environ.get('CPPFLAGS_host', '').split() +
+                  os.environ.get('CFLAGS_host', '').split() + cflags_c)
+      cflags_cc = (os.environ.get('CPPFLAGS_host', '').split() +
+                   os.environ.get('CXXFLAGS_host', '').split() + cflags_cc)
 
     defines = config.get('defines', []) + extra_defines
     self.WriteVariableList(ninja_file, 'defines',
@@ -1672,7 +1677,7 @@ def CommandWithWrapper(cmd, wrappers, prog):
 
 def GetDefaultConcurrentLinks():
   """Returns a best-guess for a number of concurrent links."""
-  pool_size = int(os.getenv('GYP_LINK_CONCURRENCY', 0))
+  pool_size = int(os.environ.get('GYP_LINK_CONCURRENCY', 0))
   if pool_size:
     return pool_size
 
@@ -1699,7 +1704,7 @@ def GetDefaultConcurrentLinks():
     # VS 2015 uses 20% more working set than VS 2013 and can consume all RAM
     # on a 64 GB machine.
     mem_limit = max(1, stat.ullTotalPhys / (5 * (2 ** 30)))  # total / 5GB
-    hard_cap = max(1, int(os.getenv('GYP_LINK_CONCURRENCY_MAX', 2**32)))
+    hard_cap = max(1, int(os.environ.get('GYP_LINK_CONCURRENCY_MAX', 2**32)))
     return min(mem_limit, hard_cap)
   elif sys.platform.startswith('linux'):
     if os.path.exists("/proc/meminfo"):