From 9148bda34df16c7d191cddbe5553bf013b1a7bd8 Mon Sep 17 00:00:00 2001 From: burnus Date: Tue, 5 Nov 2013 20:27:22 +0000 Subject: 2013-11-05 Tobias Burnus gcc/c-family/ * c.opt (-Wdate-time): New option * c-opts.c (sanitize_cpp_opts): Pass on to libcpp. gcc/ * doc/invoke.texi (-Wdate-time): Document. gcc/fortran * lang.opt (-Wdate-time): New option * cpp.c (gfc_cpp_option_data): Add warn_date_time. (gfc_cpp_init_options, gfc_cpp_handle_option, gfc_cpp_post_options): Handle it and pass on to libcpp. gcc/testsuite/ * g++.dg/warn/wdate-time.C: New. * gcc.dg/wdate-time.c: New. * gfortran.dg/wdate-time.F90: New. libcpp/ * include/cpplib.h (CPP_W_DATE_TIME): Added. (cpp_options): Add warn_date_time. * init.c (cpp_create_reader): Init it. * macro.c (_cpp_builtin_macro_text): Warn when __DATE__/__TIME__/__TIMESTAMP__ is used. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204420 138bc75d-0d04-0410-961f-82ee72b054a4 --- libcpp/ChangeLog | 10 +++++++++- libcpp/include/cpplib.h | 6 +++++- libcpp/init.c | 1 + libcpp/macro.c | 7 +++++++ 4 files changed, 22 insertions(+), 2 deletions(-) (limited to 'libcpp') diff --git a/libcpp/ChangeLog b/libcpp/ChangeLog index 2e98e34887e..670affd90e7 100644 --- a/libcpp/ChangeLog +++ b/libcpp/ChangeLog @@ -1,6 +1,14 @@ +2013-11-05 Tobias Burnus + + * include/cpplib.h (CPP_W_DATE_TIME): Added. + (cpp_options): Add warn_date_time. + * init.c (cpp_create_reader): Init it. + * macro.c (_cpp_builtin_macro_text): Warn when + __DATE__/__TIME__/__TIMESTAMP__ is used. + 2013-10-31 Edward Smith-Rowland <3dw4rd@verizon.net> - Implement C++14 digit separators. + Implement C++14 digit separators. * include/cpplib.h (cpp_options): Add digit_separators flag. * internal.h (DIGIT_SEP(c)): New macro. * expr.c (cpp_classify_number): Check improper placement of digit sep; diff --git a/libcpp/include/cpplib.h b/libcpp/include/cpplib.h index 34ad6c30c8e..02927d4c6cb 100644 --- a/libcpp/include/cpplib.h +++ b/libcpp/include/cpplib.h @@ -337,6 +337,9 @@ struct cpp_options /* Nonzero means warn if slash-star appears in a comment. */ unsigned char warn_comments; + /* Nonzero means to warn about __DATA__, __TIME__ and __TIMESTAMP__ usage. */ + unsigned char warn_date_time; + /* Nonzero means warn if a user-supplied include directory does not exist. */ unsigned char warn_missing_include_dirs; @@ -925,7 +928,8 @@ enum { CPP_W_NORMALIZE, CPP_W_INVALID_PCH, CPP_W_WARNING_DIRECTIVE, - CPP_W_LITERAL_SUFFIX + CPP_W_LITERAL_SUFFIX, + CPP_W_DATE_TIME }; /* Output a diagnostic of some kind. */ diff --git a/libcpp/init.c b/libcpp/init.c index 97aa6cdd45f..67444301590 100644 --- a/libcpp/init.c +++ b/libcpp/init.c @@ -193,6 +193,7 @@ cpp_create_reader (enum c_lang lang, cpp_hash_table *table, CPP_OPTION (pfile, canonical_system_headers) = ENABLE_CANONICAL_SYSTEM_HEADERS; CPP_OPTION (pfile, ext_numeric_literals) = 1; + CPP_OPTION (pfile, warn_date_time) = 0; /* Default CPP arithmetic to something sensible for the host for the benefit of dumb users like fix-header. */ diff --git a/libcpp/macro.c b/libcpp/macro.c index 6d46027e4ea..3a1728d6663 100644 --- a/libcpp/macro.c +++ b/libcpp/macro.c @@ -232,6 +232,10 @@ _cpp_builtin_macro_text (cpp_reader *pfile, cpp_hashnode *node) case BT_TIMESTAMP: { + if (CPP_OPTION (pfile, warn_date_time)) + cpp_warning (pfile, CPP_W_DATE_TIME, "Macro \"%s\" might prevent " + "reproduce builds", NODE_NAME (node)); + cpp_buffer *pbuffer = cpp_get_buffer (pfile); if (pbuffer->timestamp == NULL) { @@ -325,6 +329,9 @@ _cpp_builtin_macro_text (cpp_reader *pfile, cpp_hashnode *node) case BT_DATE: case BT_TIME: + if (CPP_OPTION (pfile, warn_date_time)) + cpp_warning (pfile, CPP_W_DATE_TIME, "Macro \"%s\" might prevent " + "reproduce builds", NODE_NAME (node)); if (pfile->date == NULL) { /* Allocate __DATE__ and __TIME__ strings from permanent -- cgit v1.2.1