X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fc-opts.c;h=589b05be3893baf3b763e338e3815fe340d5482b;hb=e4cdb4c6a9fe30297ea553e9724a836fd46fe331;hp=8b31b8879e7cb129cf2f8bff26ff814bc13f108d;hpb=1c2f00122e66a5bdcf326b3f6334e93146ca7cc5;p=pf3gnuchains%2Fgcc-fork.git

diff --git a/gcc/c-opts.c b/gcc/c-opts.c
index 8b31b8879e7..589b05be389 100644
--- a/gcc/c-opts.c
+++ b/gcc/c-opts.c
@@ -54,7 +54,7 @@ along with GCC; see the file COPYING3.  If not see
 #endif
 
 /* CPP's options.  */
-static cpp_options *cpp_opts;
+cpp_options *cpp_opts;
 
 /* Input filename.  */
 static const char *this_input_filename;
@@ -321,7 +321,7 @@ c_common_handle_option (size_t scode, const char *arg, int value)
 	    error ("-I- specified twice");
 	  quote_chain_split = true;
 	  split_quote_chain ();
-	  inform ("obsolete option -I- used, please use -iquote instead");
+	  inform (input_location, "obsolete option -I- used, please use -iquote instead");
 	}
       break;
 
@@ -376,7 +376,7 @@ c_common_handle_option (size_t scode, const char *arg, int value)
       break;
 
     case OPT_Wall:
-      set_Wunused (value);
+      warn_unused = value;
       set_Wformat (value);
       set_Wimplicit (value);
       warn_char_subscripts = value;
@@ -404,9 +404,12 @@ c_common_handle_option (size_t scode, const char *arg, int value)
 	warn_uninitialized = (value ? 2 : 0);
 
       if (!c_dialect_cxx ())
-	/* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
-	   can turn it off only if it's not explicit.  */
-	warn_main = value * 2;
+	{
+	  /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
+	     can turn it off only if it's not explicit.  */
+	  if (warn_main == -1)
+	    warn_main = (value ? 2 : 0);
+	}
       else
 	{
 	  /* C++-specific warnings.  */
@@ -423,6 +426,10 @@ c_common_handle_option (size_t scode, const char *arg, int value)
 	warn_pointer_sign = 1;
       break;
 
+    case OPT_Wbuiltin_macro_redefined:
+      cpp_opts->warn_builtin_macro_redefined = value;
+      break;
+
     case OPT_Wcomment:
     case OPT_Wcomments:
       cpp_opts->warn_comments = value;
@@ -467,13 +474,6 @@ c_common_handle_option (size_t scode, const char *arg, int value)
       cpp_opts->warn_invalid_pch = value;
       break;
 
-    case OPT_Wmain:
-      if (value)
-	warn_main = 1;
-      else
-	warn_main = -1;
-      break;
-
     case OPT_Wmissing_include_dirs:
       cpp_opts->warn_missing_include_dirs = value;
       break;
@@ -615,9 +615,6 @@ c_common_handle_option (size_t scode, const char *arg, int value)
     case OPT_fhosted:
       flag_hosted = value;
       flag_no_builtin = !value;
-      /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
-      if (!value && warn_main == 2)
-	warn_main = 0;
       break;
 
     case OPT_fshort_double:
@@ -907,6 +904,8 @@ c_common_handle_option (size_t scode, const char *arg, int value)
 	warn_pointer_sign = 1;
       if (warn_overlength_strings == -1)
 	warn_overlength_strings = 1;
+      if (warn_main == -1)
+	warn_main = 2;
       break;
 
     case OPT_print_objc_runtime_info:
@@ -1071,6 +1070,15 @@ c_common_post_options (const char **pfilename)
   if (warn_overlength_strings == -1 || c_dialect_cxx ())
     warn_overlength_strings = 0;
 
+  /* Wmain is enabled by default in C++ but not in C.  */
+  /* Wmain is disabled by default for -ffreestanding (!flag_hosted),
+     even if -Wall was given (warn_main will be 2 if set by -Wall, 1
+     if set by -Wmain).  */
+  if (warn_main == -1)
+    warn_main = (c_dialect_cxx () && flag_hosted) ? 1 : 0;
+  else if (warn_main == 2)
+    warn_main = flag_hosted ? 1 : 0;
+
   /* In C, -Wconversion enables -Wsign-conversion (unless disabled
      through -Wno-sign-conversion). While in C++,
      -Wsign-conversion needs to be requested explicitly.  */