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

base/base_paths_posix.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.
 
 // Defines base::PathProviderPosix, default path provider on POSIX OSes that
 // don't have their own base_paths_OS.cc implementation (i.e. all but Mac and
 // Android).
 
 #include "base/base_paths.h"
 
 #include <limits.h>
 #include <stddef.h>
 
 #include <memory>
 #include <ostream>
 #include <string>
 
 #include "base/environment.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/nix/xdg_util.h"
 #include "base/path_service.h"
 #include "base/process/process_metrics.h"
 #include "build/build_config.h"
 
 #if defined(OS_FREEBSD)
 #include <sys/param.h>
 #include <sys/sysctl.h>
-#elif defined(OS_SOLARIS)
+#elif defined(OS_SOLARIS) || defined(OS_AIX)
 #include <stdlib.h>
 #endif
 
 namespace base {
 
 bool PathProviderPosix(int key, FilePath* result) {
   FilePath path;
   switch (key) {
     case FILE_EXE:
     case FILE_MODULE: {  // TODO(evanm): is this correct?
@@ skipping 19 matching lines @@
       *result = FilePath(FilePath::StringType(bin_dir, length - 1));
       return true;
 #elif defined(OS_SOLARIS)
       char bin_dir[PATH_MAX + 1];
       if (realpath(getexecname(), bin_dir) == NULL) {
         NOTREACHED() << "Unable to resolve " << getexecname() << ".";
         return false;
       }
       *result = FilePath(bin_dir);
       return true;
-#elif defined(OS_OPENBSD)
+#elif defined(OS_OPENBSD) || defined(OS_AIX)
       // There is currently no way to get the executable path on OpenBSD
       char* cpath;
       if ((cpath = getenv("CHROME_EXE_PATH")) != NULL)
         *result = FilePath(cpath);
       else
         *result = FilePath("/usr/local/chrome/chrome");
       return true;
 #endif
     }
     case DIR_SOURCE_ROOT: {
@@ skipping 29 matching lines @@
       FilePath cache_dir(
           nix::GetXDGDirectory(env.get(), "XDG_CACHE_HOME", ".cache"));
       *result = cache_dir;
       return true;
     }
   }
   return false;
 }
 
 }  // namespace base