VS: Allow /Fa to set AssemblerListingLocation (#14153)

Generate the default AssemblerListingLocation through the flag map so
that it can be overridden by a user /Fa flag.  Also teach the VS 7-9
generators to map /Fa to AssemblerListingLocation.

While at it, fix the AssemblerListingLocation default value to have a
trailing slash after the configuration name.  This ensures it will be
treated as a directory and not a file name.

Source/cmLocalVisualStudio7Generator.cxx

@@ -476,6 +476,9 @@ cmVS7FlagTable cmLocalVisualStudio7GeneratorFlagTable[] =
   {"ForcedIncludeFiles", "FI", "Forced include files", "",
    cmVS7FlagTable::UserValueRequired | cmVS7FlagTable::SemicolonAppendable},
 
+  {"AssemblerListingLocation", "Fa", "ASM List Location", "",
+   cmVS7FlagTable::UserValue},
+
   // boolean flags
   {"BufferSecurityCheck", "GS", "Buffer security check", "TRUE", 0},
   {"BufferSecurityCheck", "GS-", "Turn off Buffer security check", "FALSE", 0},
@@ -740,6 +743,8 @@ void cmLocalVisualStudio7Generator::WriteConfiguration(std::ostream& fout,
                         table,
                         this->ExtraFlagTable);
   targetOptions.FixExceptionHandlingDefault();
+  std::string asmLocation = std::string(configName) + "/";
+  targetOptions.AddFlag("AssemblerListingLocation", asmLocation.c_str());
   targetOptions.Parse(flags.c_str());
   targetOptions.Parse(defineFlags.c_str());
   targetOptions.ParseFinish();
@@ -836,7 +841,6 @@ void cmLocalVisualStudio7Generator::WriteConfiguration(std::ostream& fout,
   fout << "\"\n";
   targetOptions.OutputFlagMap(fout, "\t\t\t\t");
   targetOptions.OutputPreprocessorDefinitions(fout, "\t\t\t\t", "\n", "CXX");
-  fout << "\t\t\t\tAssemblerListingLocation=\"" << configName << "\"\n";
   fout << "\t\t\t\tObjectFile=\"$(IntDir)\\\"\n";
   fout << "/>\n";  // end of <Tool Name=VCCLCompilerTool
   tool = "VCCustomBuildTool";

Source/cmVisualStudio10TargetGenerator.cxx

@@ -1218,6 +1218,8 @@ bool cmVisualStudio10TargetGenerator::ComputeClOptions(
   std::string defineFlags = this->Target->GetMakefile()->GetDefineFlags();
   clOptions.FixExceptionHandlingDefault();
   clOptions.AddFlag("PrecompiledHeader", "NotUsing");
+  std::string asmLocation = configName + "/";
+  clOptions.AddFlag("AssemblerListingLocation", asmLocation.c_str());
   clOptions.Parse(flags.c_str());
   clOptions.Parse(defineFlags.c_str());
   clOptions.AddDefines(this->Target->GetCompileDefinitions(
@@ -1260,9 +1262,6 @@ void cmVisualStudio10TargetGenerator::WriteClOptions(
 
   clOptions.OutputPreprocessorDefinitions(*this->BuildFileStream, "      ",
                                           "\n", "CXX");
-  this->WriteString("<AssemblerListingLocation>", 3);
-  *this->BuildFileStream << configName
-                         << "</AssemblerListingLocation>\n";
   this->WriteString("<ObjectFileName>$(IntDir)</ObjectFileName>\n", 3);
   this->WriteString("</ClCompile>\n", 2);
 }