diff options
Diffstat (limited to 'contrib/gcc/c-opts.c')
| -rw-r--r-- | contrib/gcc/c-opts.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/contrib/gcc/c-opts.c b/contrib/gcc/c-opts.c index 7f193749fd6a..0c584eb8ca74 100644 --- a/contrib/gcc/c-opts.c +++ b/contrib/gcc/c-opts.c @@ -396,7 +396,7 @@ c_common_handle_option (size_t scode, const char *arg, int value) if (c_dialect_cxx ()) warn_sign_compare = value; warn_switch = value; - warn_strict_aliasing = value; + set_warn_strict_aliasing (value); warn_strict_overflow = value; warn_address = value; @@ -606,6 +606,10 @@ c_common_handle_option (size_t scode, const char *arg, int value) disable_builtin_function (arg); break; + case OPT_fdirectives_only: + cpp_opts->directives_only = 1; + break; + case OPT_fdollars_in_identifiers: cpp_opts->dollars_in_ident = value; break; @@ -1329,6 +1333,11 @@ sanitize_cpp_opts (void) if (flag_dump_macros == 'M') flag_no_output = 1; + /* By default, -fdirectives-only implies -dD. This allows subsequent phases + to perform proper macro expansion. */ + if (cpp_opts->directives_only && !cpp_opts->preprocessed && !flag_dump_macros) + flag_dump_macros = 'D'; + /* Disable -dD, -dN and -dI if normal output is suppressed. Allow -dM since at least glibc relies on -M -dM to work. */ /* Also, flag_no_output implies flag_no_line_commands, always. */ @@ -1359,6 +1368,14 @@ sanitize_cpp_opts (void) actually output the current directory? */ if (flag_working_directory == -1) flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE); + + if (cpp_opts->directives_only) + { + if (warn_unused_macros) + error ("-fdirectives-only is incompatible with -Wunused_macros"); + if (cpp_opts->traditional) + error ("-fdirectives-only is incompatible with -traditional"); + } } /* Add include path with a prefix at the front of its name. */ @@ -1442,6 +1459,8 @@ finish_options (void) } } } + else if (cpp_opts->directives_only) + cpp_init_special_builtins (parse_in); include_cursor = 0; push_command_line_include (); |