GN: aix port along with linux_s390x, linux_ppc64 and linux_ppc64le support.

base/process/internal_linux.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/process/internal_linux.h"
 
 #include <limits.h>
 #include <unistd.h>
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
 
+// Not defined on AIX by default.

[Nico, 2017/04/25 18:50:40]

You build _linux files on aix?

[rayb, 2017/04/25 22:40:17]

Yeah. To be exact 8 of them. Mostly related to process handling and one in
threading. The extra bit of code required to make them work for AIX is pretty
small. Or at least small enough that they can just be guarded with the OS_AIX
macro (similar in size to the code guarded by the OS_CHROMEOS macros).

In the future, if the code paths for Linux and AIX diverge to an extent where
this just looks silly, then we can just add new files. Does that sound
reasonable?

+#if defined(OS_AIX)
+#define NAME_MAX 255
+#endif
+
 namespace base {
 namespace internal {
 
 const char kProcDir[] = "/proc";
 
 const char kStatFile[] = "stat";
 
 FilePath GetProcPidDir(pid_t pid) {
   return FilePath(kProcDir).Append(IntToString(pid));
 }
@@ skipping 185 matching lines @@
   // which means the answer is 100.
   // It may be the case that this value is always 100.
   static const int kHertz = sysconf(_SC_CLK_TCK);
 
   return TimeDelta::FromMicroseconds(
       Time::kMicrosecondsPerSecond * clock_ticks / kHertz);
 }
 
 }  // namespace internal
 }  // namespace base