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This option, which is enabled by default, causes the preprocessor to warn when a string or character literal is followed by a ud-suffix which does not begin with an underscore. According to [lex.ext]p10, this is ill-formed. Also modifies the preprocessor to treat such ill-formed suffixes as separate preprocessing tokens. This is consistent with the Clang front end (see http://llvm.org/viewvc/llvm-project?view=rev&revision=152287), and enables backwards compatibility with code that uses formatting macros from <inttypes.h>, as in the following code block: int main() { int64_t i64 = 123; printf("My int64: %"PRId64"\n", i64); } Google ref b/6377711. 2012-04-27 Ollie Wild <aaw@google.com> PR c++/52538 * gcc/c-family/c-common.c: Add CPP_W_LITERAL_SUFFIX mapping. * gcc/c-family/c-opts.c (c_common_handle_option): Handle OPT_Wliteral_suffix. * gcc/c-family/c.opt: Add Wliteral-suffix. * gcc/doc/invoke.texi (Wliteral-suffix): Document new option. * gcc/testsuite/g++.dg/cpp0x/Wliteral-suffix.c: New test. * libcpp/include/cpplib.h (struct cpp_options): Add new field, warn_literal_suffix. (CPP_W_LITERAL_SUFFIX): New enum. * libcpp/init.c (cpp_create_reader): Default initialization of warn_literal_suffix. * libcpp/lex.c (lex_raw_string): Treat user-defined literals which don't begin with '_' as separate tokens and produce a warning. (lex_string): Ditto. From-SVN: r186909 |
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| boehm-gc | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libiberty | ||
| libitm | ||
| libjava | ||
| libmudflap | ||
| libobjc | ||
| libquadmath | ||
| libssp | ||
| libstdc++-v3 | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| ABOUT-NLS | ||
| ChangeLog | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| lt~obsolete.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| README | ||
| symlink-tree | ||
| ylwrap | ||
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully.