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

pylib/gyp/generator/ninja.py

 # Copyright (c) 2013 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.
 
 import collections
 import copy
 import hashlib
 import json
 import multiprocessing
 import os.path
@@ skipping 903 matching lines @@
       cflags_c = config.get('cflags_c', [])
       cflags_cc = config.get('cflags_cc', [])
 
     # Respect environment variables related to build, but target-specific
     # flags can still override them.
     if self.toolset == 'target':
       cflags_c = (os.environ.get('CPPFLAGS', '').split() +
                   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',
                            [Define(d, self.flavor) for d in defines])
     if self.flavor == 'win':
       self.WriteVariableList(ninja_file, 'asmflags',
                              map(self.ExpandSpecial, asmflags))
       self.WriteVariableList(ninja_file, 'rcflags',
           [QuoteShellArgument(self.ExpandSpecial(f), self.flavor)
            for f in self.msvs_settings.GetRcflags(config_name,
@@ skipping 731 matching lines @@
 
 def CommandWithWrapper(cmd, wrappers, prog):
   wrapper = wrappers.get(cmd, '')
   if wrapper:
     return wrapper + ' ' + prog
   return prog
 
 
 def GetDefaultConcurrentLinks():
   """Returns a best-guess for a number of concurrent links."""
-  pool_size = int(os.environ.get('GYP_LINK_CONCURRENCY', 0))
+  pool_size = int(os.getenv('GYP_LINK_CONCURRENCY', 0))
   if pool_size:
     return pool_size
 
   if sys.platform in ('win32', 'cygwin'):
     import ctypes
 
     class MEMORYSTATUSEX(ctypes.Structure):
       _fields_ = [
         ("dwLength", ctypes.c_ulong),
         ("dwMemoryLoad", ctypes.c_ulong),
         ("ullTotalPhys", ctypes.c_ulonglong),
         ("ullAvailPhys", ctypes.c_ulonglong),
         ("ullTotalPageFile", ctypes.c_ulonglong),
         ("ullAvailPageFile", ctypes.c_ulonglong),
         ("ullTotalVirtual", ctypes.c_ulonglong),
         ("ullAvailVirtual", ctypes.c_ulonglong),
         ("sullAvailExtendedVirtual", ctypes.c_ulonglong),
       ]
 
     stat = MEMORYSTATUSEX()
     stat.dwLength = ctypes.sizeof(stat)
     ctypes.windll.kernel32.GlobalMemoryStatusEx(ctypes.byref(stat))
 
     # 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.environ.get('GYP_LINK_CONCURRENCY_MAX', 2**32)))
+    hard_cap = max(1, int(os.getenv('GYP_LINK_CONCURRENCY_MAX', 2**32)))
     return min(mem_limit, hard_cap)
   elif sys.platform.startswith('linux'):
     if os.path.exists("/proc/meminfo"):
       with open("/proc/meminfo") as meminfo:
         memtotal_re = re.compile(r'^MemTotal:\s*(\d*)\s*kB')
         for line in meminfo:
           match = memtotal_re.match(line)
           if not match:
             continue
           # Allow 8Gb per link on Linux because Gold is quite memory hungry
@@ skipping 671 matching lines @@
           arglists.append(
               (target_list, target_dicts, data, params, config_name))
         pool.map(CallGenerateOutputForConfig, arglists)
       except KeyboardInterrupt, e:
         pool.terminate()
         raise e
     else:
       for config_name in config_names:
         GenerateOutputForConfig(target_list, target_dicts, data, params,
                                 config_name)