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

base/logging.cc

Index: base/logging.cc
diff --git a/base/logging.cc b/base/logging.cc
index cea6edae4a37cef2519ff32045c46c0a3c73e4d0..e5793827ed04a3e599bb31f55083e43264a71ea6 100644
--- a/base/logging.cc
+++ b/base/logging.cc
@@ -531,7 +531,8 @@ LogMessage::LogMessage(const char* file, int line, LogSeverity severity,
 }
 
 LogMessage::~LogMessage() {
-#if !defined(OFFICIAL_BUILD) && !defined(OS_NACL) && !defined(__UCLIBC__)
+#if !defined(OFFICIAL_BUILD) && !defined(OS_NACL) && !defined(__UCLIBC__) && \
+    !defined(OS_AIX)
   if (severity_ == LOG_FATAL && !base::debug::BeingDebugged()) {
     // Include a stack trace on a fatal, unless a debugger is attached.
     base::debug::StackTrace trace;