gn: various flag matching for 'base'

build/config/compiler/BUILD.gn

 # Copyright (c) 2013 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.
 
 import("//build/config/android/config.gni")
 if (cpu_arch == "arm") {
   import("//build/config/arm.gni")
 }
 if (is_posix) {
   import("//build/config/gcc/gcc_version.gni")
@@ skipping 85 matching lines @@
       cflags += [ "-fstack-protector", "--param=ssp-buffer-size=4" ]
     }
 
     # Linker warnings.
     if (!(is_chromeos && cpu_arch == "arm") && !is_mac) {
       # TODO(jochen): Enable this on chromeos on arm. http://crbug.com/356580
       ldflags += [ "-Wl,--fatal-warnings" ]
     }
   }
 
+  if (is_clang) {
+    cflags += [
+      # TODO(thakis): Remove once http://llvm.org/PR20354 is fixed
+      # and the fix is in chromium.
+      "-fno-slp-vectorize",
+    ]
+  }
+
   if (is_clang && !is_win) {
     # This is here so that all files get recompiled after a clang roll and
     # when turning clang on or off. (defines are passed via the command line,
     # and build system rebuild things when their commandline changes). Nothing
     # should ever read this define.
     defines += [
       "CR_CLANG_REVISION=" +
           exec_script(
               "//tools/clang/scripts/posix-print-revision.py", [], "value")
     ]
@@ skipping 27 matching lines @@
     # -----------------------------------
     if (gcc_version >= 48) {
       cflags_cc += [
         "-std=gnu++11",
       ]
     }
 
     # CPU architecture. We may or may not be doing a cross compile now, so for
     # simplicity we always explicitly set the architecture.
     if (cpu_arch == "x64") {
-      cflags += [ "-m64" ]
+      cflags += [ "-m64", "-march=x86-64", ]
       ldflags += [ "-m64" ]
     } else if (cpu_arch == "x86") {
       cflags += [ "-m32" ]
       ldflags += [ "-m32" ]
     } else if (cpu_arch == "arm") {
       # Don't set the compiler flags for the WebView build. These will come
       # from the Android build system.
       if (!is_android_webview_build) {
         cflags += [
           "-march=$arm_arch",
@@ skipping 533 matching lines @@
 
         # Clang considers the `register` keyword as deprecated, but e.g.
         # code generated by flex (used in angle) contains that keyword.
         # http://crbug.com/255186
         "-Wno-deprecated-register",
 
         # TODO(thakis): This used to be implied by -Wno-unused-function,
         # which we no longer use. Check if it makes sense to remove
         # this as well. http://crbug.com/316352
         "-Wno-unneeded-internal-declaration",
+
+        # TODO(thakis): Remove, http://crbug.com/263960
+        "-Wno-reserved-user-defined-literal",
       ]
-
-      if (!is_mac && !is_ios) {
-        cflags_cc += [
-          "-Wno-reserved-user-defined-literal",
-        ]
-      }
     }
     if (gcc_version >= 48) {
       cflags_cc += [
         # See comment for -Wno-c++11-narrowing.
         "-Wno-narrowing",
         # TODO(thakis): Remove, http://crbug.com/263960
         "-Wno-literal-suffix",
       ]
     }
 
@@ skipping 194 matching lines @@
       cflags += [ "-gsplit-dwarf" ]
     }
   }
 }
 
 config("no_symbols") {
   if (!is_win) {
     cflags = [ "-g0" ]
   }
 }