* config.gcc (vax-*-linux*): Keep the original contents of

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

diff --git a/gcc/c-opts.c b/gcc/c-opts.c
index df6fdad..6c2f5a5 100644 (file)
--- a/gcc/c-opts.c
+++ b/gcc/c-opts.c
@@ -232,6 +232,7 @@ c_common_init_options (unsigned int argc, const char **argv)
   flag_exceptions = c_dialect_cxx ();
   warn_pointer_arith = c_dialect_cxx ();
   warn_write_strings = c_dialect_cxx();
+  flag_warn_unused_result = true;
 
   /* By default, C99-like requirements for complex multiply and divide.  */
   flag_complex_method = 2;
@@ -342,6 +343,7 @@ c_common_handle_option (size_t scode, const char *arg, int value)
     case OPT_MD:
     case OPT_MMD:
       cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER);
+      cpp_opts->deps.need_preprocessor_output = true;
       deps_file = arg;
       break;
 
@@ -445,6 +447,11 @@ c_common_handle_option (size_t scode, const char *arg, int value)
         implies -Wenum-compare.  */
       if (warn_enum_compare == -1 && value)
        warn_enum_compare = value;
+      /* Because C++ always warns about a goto which misses an
+        initialization, -Wc++-compat turns on -Wjump-misses-init.  */
+      if (warn_jump_misses_init == -1 && value)
+       warn_jump_misses_init = value;
+      cpp_opts->warn_cxx_operator_names = value;
       break;
 
     case OPT_Wdeprecated:
@@ -1026,6 +1033,29 @@ c_common_post_options (const char **pfilename)
   C_COMMON_OVERRIDE_OPTIONS;
 #endif
 
+  if (flag_lto || flag_whopr)
+    {
+#ifdef ENABLE_LTO
+      flag_generate_lto = 1;
+
+      /* When generating IL, do not operate in whole-program mode.
+        Otherwise, symbols will be privatized too early, causing link
+        errors later.  */
+      flag_whole_program = 0;
+
+      /* FIXME lto.  Disable var-tracking until debug information
+        is properly handled in free_lang_data.  */
+      flag_var_tracking = 0;
+#else
+      error ("LTO support has not been enabled in this configuration");
+#endif
+    }
+
+  /* Reconcile -flto and -fwhopr.  Set additional flags as appropriate and
+     check option consistency.  */
+  if (flag_lto && flag_whopr)
+    error ("-flto and -fwhopr are mutually exclusive");
+
   /* Excess precision other than "fast" requires front-end
      support.  */
   if (c_dialect_cxx ())
@@ -1083,6 +1113,8 @@ c_common_post_options (const char **pfilename)
     warn_strict_aliasing = 0;
   if (warn_strict_overflow == -1)
     warn_strict_overflow = 0;
+  if (warn_jump_misses_init == -1)
+    warn_jump_misses_init = 0;
 
   /* -Woverlength-strings is off by default, but is enabled by -pedantic.
      It is never enabled in C++, as the minimum limit is not normative