gcc/

[pf3gnuchains/gcc-fork.git] / gcc / c-opts.c

diff --git a/gcc/c-opts.c b/gcc/c-opts.c
index 33d0e6b..589b05b 100644 (file)
--- 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:
@@ -1018,14 +1017,6 @@ c_common_post_options (const char **pfilename)
   C_COMMON_OVERRIDE_OPTIONS;
 #endif
 
-  flag_inline_trees = 1;
-
-  /* Use tree inlining.  */
-  if (!flag_no_inline)
-    flag_no_inline = 1;
-  if (flag_inline_functions)
-    flag_inline_trees = 2;
-
   /* By default we use C99 inline semantics in GNU99 or C99 mode.  C99
      inline semantics are not supported in GNU89 or C89 mode.  */
   if (flag_gnu89_inline == -1)
@@ -1033,14 +1024,6 @@ c_common_post_options (const char **pfilename)
   else if (!flag_gnu89_inline && !flag_isoc99)
     error ("-fno-gnu89-inline is only supported in GNU99 or C99 mode");
 
-  /* If we are given more than one input file, we must use
-     unit-at-a-time mode.  */
-  if (num_in_fnames > 1)
-    flag_unit_at_a_time = 1;
-
-  if (pch_file && !flag_unit_at_a_time)
-    sorry ("Precompiled headers require -funit-at-a-time");
-
   /* Default to ObjC sjlj exception handling if NeXT runtime.  */
   if (flag_objc_sjlj_exceptions < 0)
     flag_objc_sjlj_exceptions = flag_next_runtime;
@@ -1087,17 +1070,14 @@ c_common_post_options (const char **pfilename)
   if (warn_overlength_strings == -1 || c_dialect_cxx ())
     warn_overlength_strings = 0;
 
-  /* Adjust various flags for C++ based on command-line settings.  */
-  if (c_dialect_cxx ())
-    {
-      if (!flag_no_inline)
-       {
-         flag_inline_trees = 1;
-         flag_no_inline = 1;
-       }
-      if (flag_inline_functions)
-       flag_inline_trees = 2;
-    } 
+  /* 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++,