Improve GN asmflags help.

tools/gn/variables.cc

 // 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.
 
 #include "tools/gn/variables.h"
 
 namespace variables {
 
 // Built-in variables ----------------------------------------------------------
 
@@ skipping 386 matching lines @@
 const char kCommonCflagsHelp[] =
     "cflags*: Flags passed to the C compiler.\n"
     "\n"
     "  A list of strings.\n"
     "\n"
     "  \"cflags\" are passed to all invocations of the C, C++, Objective C,\n"
     "  and Objective C++ compilers.\n"
     "\n"
     "  To target one of these variants individually, use \"cflags_c\",\n"
     "  \"cflags_cc\", \"cflags_objc\", and \"cflags_objcc\",\n"
-    "  respectively.\n"
+    "  respectively. These variant-specific versions of cflags* will be\n"
+    "  appended on the compiler command line after \"cflags\".\n"
     "\n"
-    "  These variant-specific versions of cflags* will be appended to the\n"
-    "  \"cflags\".\n"
+    "  See also \"asmflags\" for flags for assembly-language files.\n"
     COMMON_ORDERING_HELP;
 const char* kCflags_Help = kCommonCflagsHelp;
 
 const char kAsmflags[] = "asmflags";
 const char kAsmflags_HelpShort[] =
-    "asmflags: [string list] Flags passed to any assembly compiler.";
+    "asmflags: [string list] Flags passed to the assembler.";
 const char* kAsmflags_Help =
-    "asmflags: Flags passed to any assembly compiler.\n"
+    "asmflags: Flags passed to the assembler.\n"
     "\n"
     "  A list of strings.\n"
     "\n"
     "  \"asmflags\" are passed to any invocation of a tool that takes an\n"
-    "  .asm or .S file as input.\n";
+    "  .asm or .S file as input.\n"
+    COMMON_ORDERING_HELP;
 
 const char kCflagsC[] = "cflags_c";
 const char kCflagsC_HelpShort[] =
     "cflags_c: [string list] Flags passed to the C compiler.";
 const char* kCflagsC_Help = kCommonCflagsHelp;
 
 const char kCflagsCC[] = "cflags_cc";
 const char kCflagsCC_HelpShort[] =
     "cflags_cc: [string list] Flags passed to the C++ compiler.";
 const char* kCflagsCC_Help = kCommonCflagsHelp;
@@ skipping 949 matching lines @@
   }
   return info_map;
 }
 
 const VariableInfoMap& GetTargetVariables() {
   static VariableInfoMap info_map;
   if (info_map.empty()) {
     INSERT_VARIABLE(AllDependentConfigs)
     INSERT_VARIABLE(AllowCircularIncludesFrom)
     INSERT_VARIABLE(Args)
+    INSERT_VARIABLE(Asmflags)
     INSERT_VARIABLE(Cflags)
     INSERT_VARIABLE(CflagsC)
     INSERT_VARIABLE(CflagsCC)
     INSERT_VARIABLE(CflagsObjC)
     INSERT_VARIABLE(CflagsObjCC)
     INSERT_VARIABLE(CheckIncludes)
     INSERT_VARIABLE(CompleteStaticLib)
     INSERT_VARIABLE(Configs)
     INSERT_VARIABLE(Console)
     INSERT_VARIABLE(Data)
@@ skipping 19 matching lines @@
     INSERT_VARIABLE(Sources)
     INSERT_VARIABLE(Testonly)
     INSERT_VARIABLE(Visibility)
   }
   return info_map;
 }
 
 #undef INSERT_VARIABLE
 
 }  // namespace variables