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

base/debug/stack_trace_unittest.cc

 // Copyright (c) 2011 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 <stddef.h>
 
 #include <limits>
 #include <sstream>
 #include <string>
 
@@ skipping 21 matching lines @@
 #endif
 
 // Note: On Linux, this test currently only fully works on Debug builds.
 // See comments in the #ifdef soup if you intend to change this.
 #if defined(OS_WIN)
 // Always fails on Windows: crbug.com/32070
 #define MAYBE_OutputToStream DISABLED_OutputToStream
 #else
 #define MAYBE_OutputToStream OutputToStream
 #endif
-#if !defined(__UCLIBC__)
+#if !defined(__UCLIBC__) && !defined(_AIX)
 TEST_F(StackTraceTest, MAYBE_OutputToStream) {
   StackTrace trace;
 
   // Dump the trace into a string.
   std::ostringstream os;
   trace.OutputToStream(&os);
   std::string backtrace_message = os.str();
 
   // ToString() should produce the same output.
   EXPECT_EQ(backtrace_message, trace.ToString());
@@ skipping 258 matching lines @@
 #endif
 
 TEST_F(StackTraceTest, MAYBE_StackEnd) {
   EXPECT_NE(0u, GetStackEnd());
 }
 
 #endif  // BUILDFLAG(CAN_UNWIND_WITH_FRAME_POINTERS)
 
 }  // namespace debug
 }  // namespace base