Add support for Borland extensions via option -fborland-extensions

(original patch r112791 was reverted due to a bug).

llvm-svn: 112915

clang/docs/tools/clang.pod

@@ -168,6 +168,10 @@ Enable support for Pascal-style strings with "\pfoo".
 
 Enable support for Microsoft extensions.
 
+=item B<-fborland-extensions>
+
+Enable support for Borland extensions.
+
 =item B<-fwritable-strings>
 
 Make all string literals default to writable.  This disables uniquing of

clang/include/clang/Basic/LangOptions.h

@@ -34,6 +34,7 @@ public:
   unsigned HexFloats         : 1;  // C99 Hexadecimal float constants.
   unsigned C99               : 1;  // C99 Support
   unsigned Microsoft         : 1;  // Microsoft extensions.
+  unsigned Borland           : 1;  // Borland extensions.
   unsigned CPlusPlus         : 1;  // C++ Support
   unsigned CPlusPlus0x       : 1;  // C++0x Support
   unsigned CXXOperatorNames  : 1;  // Treat C++ operator names as keywords.
@@ -140,7 +141,7 @@ public:
     HexFloats = 0;
     GC = ObjC1 = ObjC2 = ObjCNonFragileABI = ObjCNonFragileABI2 = 0;
     NoConstantCFStrings = 0; InlineVisibilityHidden = 0;
-    C99 = Microsoft = CPlusPlus = CPlusPlus0x = 0;
+    C99 = Microsoft = Borland = CPlusPlus = CPlusPlus0x = 0;
     CXXOperatorNames = PascalStrings = WritableStrings = ConstStrings = 0;
     Exceptions = SjLjExceptions = Freestanding = NoBuiltin = 0;
     NeXTRuntime = 1;

clang/include/clang/Driver/CC1Options.td

@@ -418,6 +418,8 @@ def fmath_errno : Flag<"-fmath-errno">,
   HelpText<"Require math functions to indicate errors by setting errno">;
 def fms_extensions : Flag<"-fms-extensions">,
   HelpText<"Accept some non-standard constructs used in Microsoft header files ">;
+def fborland_extensions : Flag<"-fborland-extensions">,
+  HelpText<"Accept non-standard constructs supported by the Borland compiler">;
 def main_file_name : Separate<"-main-file-name">,
   HelpText<"Main file name to use for debug info">;
 def fno_elide_constructors : Flag<"-fno-elide-constructors">,

clang/include/clang/Driver/Options.td

@@ -243,6 +243,7 @@ def fast : Flag<"-fast">, Group<f_Group>;
 def fasynchronous_unwind_tables : Flag<"-fasynchronous-unwind-tables">, Group<f_Group>;
 def fblocks : Flag<"-fblocks">, Group<f_Group>;
 def fbootclasspath_EQ : Joined<"-fbootclasspath=">, Group<f_Group>;
+def fborland_extensions : Flag<"-fborland-extensions">, Group<f_Group>;
 def fbuiltin_strcat : Flag<"-fbuiltin-strcat">, Group<f_Group>;
 def fbuiltin_strcpy : Flag<"-fbuiltin-strcpy">, Group<f_Group>;
 def fbuiltin : Flag<"-fbuiltin">, Group<f_Group>;
@@ -302,6 +303,7 @@ def fno_asm : Flag<"-fno-asm">, Group<f_Group>;
 def fno_asynchronous_unwind_tables : Flag<"-fno-asynchronous-unwind-tables">, Group<f_Group>;
 def fno_assume_sane_operator_new : Flag<"-fno-assume-sane-operator-new">, Group<f_Group>;
 def fno_blocks : Flag<"-fno-blocks">, Group<f_Group>;
+def fno_borland_extensions : Flag<"-fno-borland-extensions">, Group<f_Group>;
 def fno_builtin_strcat : Flag<"-fno-builtin-strcat">, Group<f_Group>;
 def fno_builtin_strcpy : Flag<"-fno-builtin-strcpy">, Group<f_Group>;
 def fno_builtin : Flag<"-fno-builtin">, Group<f_Group>;

clang/lib/Driver/Tools.cpp

@@ -1215,6 +1215,11 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
                    getToolChain().getTriple().getOS() == llvm::Triple::Win32))
     CmdArgs.push_back("-fms-extensions");
 
+  // -fborland-extensions=0 is default.
+  if (Args.hasFlag(options::OPT_fborland_extensions,
+                   options::OPT_fno_borland_extensions, false))
+    CmdArgs.push_back("-fborland-extensions");
+
   // -fgnu-keywords default varies depending on language; only pass if
   // specified.
   if (Arg *A = Args.getLastArg(options::OPT_fgnu_keywords,

clang/lib/Frontend/CompilerInvocation.cpp

@@ -526,6 +526,8 @@ static void LangOptsToArgs(const LangOptions &Opts,
     Res.push_back("-fgnu-keywords");
   if (Opts.Microsoft)
     Res.push_back("-fms-extensions");
+  if (Opts.Borland)
+    Res.push_back("-fborland-extensions");
   if (Opts.ObjCNonFragileABI)
     Res.push_back("-fobjc-nonfragile-abi");
   if (Opts.ObjCNonFragileABI2)
@@ -1317,6 +1319,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
                                    !Opts.AsmPreprocessor);
   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
   Opts.Microsoft = Args.hasArg(OPT_fms_extensions);
+  Opts.Borland = Args.hasArg(OPT_fborland_extensions);
   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
   Opts.ConstStrings = Args.hasArg(OPT_Wwrite_strings);
   if (Args.hasArg(OPT_fno_lax_vector_conversions))

clang/test/SemaCXX/borland-extensions.cpp

@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 %s -fsyntax-only -verify -fborland-extensions
+
+// Borland extensions
+
+// 1. test  -fborland-extensions
+int dummy_function() { return 0; }