Add driver support for -fsigned-char/-funsigned-char.

llvm-svn: 72930

Author: eefriedman

clang/include/clang/Driver/Options.def

@@ -227,6 +227,7 @@ OPTION("--resource=", _resource_EQ, Joined, INVALID, fcompile_resource_EQ, "", 0
 OPTION("--resource", _resource, Separate, INVALID, fcompile_resource_EQ, "J", 0, 0, 0)
 OPTION("--save-temps", _save_temps, Flag, INVALID, save_temps, "", 0, 0, 0)
 OPTION("--shared", _shared, Flag, INVALID, shared, "", 0, 0, 0)
+OPTION("--signed-char", _signed_char, Flag, INVALID, fsigned_char, "", 0, 0, 0)
 OPTION("--specs=", _specs_EQ, Joined, INVALID, specs_EQ, "u", 0, 0, 0)
 OPTION("--specs", _specs, Separate, INVALID, specs_EQ, "uJ", 0, 0, 0)
 OPTION("--static", _static, Flag, INVALID, static, "", 0, 0, 0)
@@ -241,6 +242,7 @@ OPTION("--traditional", _traditional, Flag, INVALID, traditional, "", 0, 0, 0)
 OPTION("--trigraphs", _trigraphs, Flag, INVALID, trigraphs, "", 0, 0, 0)
 OPTION("--undefine-macro=", _undefine_macro_EQ, Joined, INVALID, U, "", 0, 0, 0)
 OPTION("--undefine-macro", _undefine_macro, Separate, INVALID, U, "J", 0, 0, 0)
+OPTION("--unsigned-char", _unsigned_char, Flag, INVALID, funsigned_char, "", 0, 0, 0)
 OPTION("--user-dependencies", _user_dependencies, Flag, INVALID, MM, "", 0, 0, 0)
 OPTION("--verbose", _verbose, Flag, INVALID, v, "", 0, 0, 0)
 OPTION("--version", _version, Flag, INVALID, INVALID, "", 0, 0, 0)
@@ -445,6 +447,7 @@ OPTION("-fprofile-arcs", fprofile_arcs, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fprofile-generate", fprofile_generate, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-framework", framework, Separate, INVALID, INVALID, "l", 0, 0, 0)
 OPTION("-fsigned-bitfields", fsigned_bitfields, Flag, f_Group, INVALID, "", 0, 0, 0)
+OPTION("-fsigned-char", fsigned_char, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fstack-protector", fstack_protector, Flag, clang_ignored_f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fstrict-aliasing", fstrict_aliasing, Flag, clang_ignored_f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fsyntax-only", fsyntax_only, Flag, INVALID, INVALID, "d", 0, 0, 0)
@@ -455,6 +458,7 @@ OPTION("-ftraditional", ftraditional, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-ftrapv", ftrapv, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-funit-at-a-time", funit_at_a_time, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-funsigned-bitfields", funsigned_bitfields, Flag, f_Group, INVALID, "", 0, 0, 0)
+OPTION("-funsigned-char", funsigned_char, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-funwind-tables", funwind_tables, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fverbose-asm", fverbose_asm, Flag, f_Group, INVALID, "", 0, 0, 0)
 OPTION("-fvisibility=", fvisibility_EQ, Joined, f_Group, INVALID, "", 0, 0, 0)

clang/lib/Driver/Tools.cpp

@@ -505,6 +505,16 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
       CmdArgs.push_back("-fblocks=0");
   }
 
+  // -fsigned-char/-funsigned-char default varies depending on platform; only
+  // pass if specified.
+  if (Arg *A = Args.getLastArg(options::OPT_fsigned_char,
+                               options::OPT_funsigned_char)) {
+    if (A->getOption().matches(options::OPT_fsigned_char))
+      CmdArgs.push_back("-fsigned-char");
+    else
+      CmdArgs.push_back("-fsigned-char=0");
+  }
+
   // -fno-pascal-strings is default, only pass non-default. If the
   // -tool chain happened to translate to -mpascal-strings, we want to
   // -back translate here.