192961ff27
Certain bad uses of C2x standard attributes (that is, attributes inside [[]] with only a name but no namespace specified) are constraint violations, and so should be diagnosed with a pedwarn (or error) where GCC currently uses a warning. This patch implements this in some cases (not yet for attributes used on types, nor for some bad uses of fallthrough attributes). Specifically, this applies to unknown standard attributes (taking care not to pedwarn for nodiscard, which is known but not implemented for C), and to all currently implemented standard attributes in attribute declarations (including when mixed with fallthrough) and on statements. Bootstrapped with no regressions on x86_64-pc-linux-gnu. gcc/c: * c-decl.c (c_warn_unused_attributes): Use pedwarn not warning for standard attributes. * c-parser.c (c_parser_std_attribute): Take argument for_tm. Use pedwarn for unknown standard attributes and return error_mark_node for them. gcc/c-family: * c-common.c (attribute_fallthrough_p): In C, use pedwarn not warning for standard attributes mixed with fallthrough attributes. gcc/testsuite: * gcc.dg/c2x-attr-fallthrough-5.c, gcc.dg/c2x-attr-syntax-5.c: New tests. * gcc.dg/c2x-attr-deprecated-2.c, gcc.dg/c2x-attr-deprecated-4.c, gcc.dg/c2x-attr-fallthrough-2.c, gcc.dg/c2x-attr-maybe_unused-2.c, gcc.dg/c2x-attr-maybe_unused-4.c: Expect errors in place of some warnings. From-SVN: r278428 |
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| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libhsail-rt | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| liboffloadmic | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ar-lib | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| 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 | ||
| multilib.am | ||
| README | ||
| symlink-tree | ||
| test-driver | ||
| 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. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.