diff options
Diffstat (limited to 'gcc/cppinit.c')
| -rw-r--r-- | gcc/cppinit.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/cppinit.c b/gcc/cppinit.c index a6be4aa..6a4dd0a 100644 --- a/gcc/cppinit.c +++ b/gcc/cppinit.c @@ -1009,6 +1009,8 @@ cpp_finish_options (pfile) _cpp_maybe_push_include_file (pfile); } + pfile->first_unused_line = pfile->line; + free_chain (CPP_OPTION (pfile, pending)->imacros_head); free_chain (CPP_OPTION (pfile, pending)->directive_head); } @@ -1081,6 +1083,10 @@ void cpp_finish (pfile) cpp_reader *pfile; { + /* Warn about unused macros before popping the final buffer. */ + if (CPP_OPTION (pfile, warn_unused_macros)) + cpp_forall_identifiers (pfile, _cpp_warn_if_unused_macro, NULL); + /* cpplex.c leaves the final buffer on the stack. This it so that it returns an unending stream of CPP_EOFs to the client. If we popped the buffer, we'd dereference a NULL buffer pointer and @@ -1165,10 +1171,12 @@ new_pending_directive (pend, text, handler) DEF_OPT("Wno-traditional", 0, OPT_Wno_traditional) \ DEF_OPT("Wno-trigraphs", 0, OPT_Wno_trigraphs) \ DEF_OPT("Wno-undef", 0, OPT_Wno_undef) \ + DEF_OPT("Wno-unused-macros", 0, OPT_Wno_unused_macros) \ DEF_OPT("Wsystem-headers", 0, OPT_Wsystem_headers) \ DEF_OPT("Wtraditional", 0, OPT_Wtraditional) \ DEF_OPT("Wtrigraphs", 0, OPT_Wtrigraphs) \ DEF_OPT("Wundef", 0, OPT_Wundef) \ + DEF_OPT("Wunused-macros", 0, OPT_Wunused_macros) \ DEF_OPT("d", no_arg, OPT_d) \ DEF_OPT("fno-operator-names", 0, OPT_fno_operator_names) \ DEF_OPT("fno-preprocessed", 0, OPT_fno_preprocessed) \ @@ -1692,6 +1700,13 @@ cpp_handle_option (pfile, argc, argv) CPP_OPTION (pfile, warn_comments) = 0; break; + case OPT_Wunused_macros: + CPP_OPTION (pfile, warn_unused_macros) = 1; + break; + case OPT_Wno_unused_macros: + CPP_OPTION (pfile, warn_unused_macros) = 0; + break; + case OPT_Wundef: CPP_OPTION (pfile, warn_undef) = 1; break; |