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| author | Neil Booth <neil@daikokuya.co.uk> | 2002-07-23 22:57:49 +0000 |
|---|---|---|
| committer | Neil Booth <neil@gcc.gnu.org> | 2002-07-23 22:57:49 +0000 |
| commit | a69cbaac60d73feb37e6c17abd6f84991dc791a0 (patch) | |
| tree | d7305615fe0d53e288982b583d2c9c637deb2699 /gcc/cppinit.c | |
| parent | b841421a28b7e7c616e58cae4b5e36599f288b7f (diff) | |
| download | gcc-a69cbaac60d73feb37e6c17abd6f84991dc791a0.zip gcc-a69cbaac60d73feb37e6c17abd6f84991dc791a0.tar.gz gcc-a69cbaac60d73feb37e6c17abd6f84991dc791a0.tar.bz2 | |
cppexp.c (parse_defined): Mark macro used.
* cppexp.c (parse_defined): Mark macro used.
* cpphash.h (struct cpp_macro): New member "used".
(_cpp_mark_macro_used, _cpp_warn_if_unused_macro): New.
(struct cpp_reader): New member.
* cppinit.c (cpp_finish_options): Set first_unused_line.
(cpp_finish): Warn of unused macros if requested.
(OPT_TABLE): New switches.
(cpp_handle_option): Handle them.
* cpplib.c (do_undef): Warn if macro unused.
(do_ifdef, do_ifndef): Mark macro used.
* cpplib.h (struct cpp_options): New member.
* cppmacro.c (_cpp_warn_if_unused_macro): New.
(enter_macro_context): Mark macro used.
(_cpp_create_definition): Mark macro unused; warn if unused
when redefined.
* cpptrad.c (scan_out_logcial_line, push_replacement_text):
Mark macros used.
* doc/cppopts.texi: Update.
testsuite:
* gcc.dg/cpp/trad/Wunused.c, gcc.dg/cpp/trad/Wunused.h,
gcc.dg/cpp/Wunused.c, gcc.dg/cpp/Wunused.h: New tests.
From-SVN: r55692
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; |