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Now new features are starting to be added to a C2X draft (in the C2x branch of the C standard git repository, no public WG14 document yet), it's time to add -std=c2x and associated options to GCC for use in enabling C2X features. This patch adds the expected set of options: -std=c2x, -std=gnu2x, -Wc11-c2x-compat. A first C2X feature is added (the only one so far in the repository that's obviously relevant to GCC): support (as in C++) for the string constant to be omitted in _Static_assert. This feature is duly also supported as an extension in earlier standard modes (diagnosed with -pedantic, unless -Wno-c11-c2x-compat is given, or with -Wc11-c2x-compat even in C2X mode). Bootstrapped with no regressions on x86_64-pc-linux-gnu. gcc/ * doc/cpp.texi (__STDC_VERSION__): Document C2X handling. * doc/invoke.texi (-std=c2x, -std=gnu2x): Document new options. * doc/standards.texi (C Language): Document C2X. * dwarf2out.c (highest_c_language), config/rl78/rl78.c (rl78_option_override): Handle "GNU C2X" language name. gcc/c/ * c-errors.c (pedwarn_c11): New function. * c-parser.c (disable_extension_diagnostics): Save warn_c11_c2x_compat and set it to 0. (restore_extension_diagnostics): Restore warn_c11_c2x_compat. (c_parser_static_assert_declaration_no_semi): Handle _Static_assert without string constant. * c-tree.h (pedwarn_c11): New prototype. gcc/c-family/ * c-common.c (flag_isoc2x): New variable. * c-common.h (clk_c): Update comment to reference C2X. (flag_isoc99, flag_isoc11): Update comments to reference future standard versions in general. (flag_isoc2x): Declare. * c-opts.c (set_std_c2x): New function. (c_common_handle_option): Handle -std=c2x and -std=gnu2x. (set_std_c89, set_std_c99, set_std_c11, set_std_c17): Set flag_isoc2x to 0. * c.opt (Wc11-c2x-compat, std=c2x, std=gnu2x): New options. gcc/testsuite/ * gcc.dg/c11-static-assert-7.c, gcc.dg/c11-static-assert-8.c, gcc.dg/c11-static-assert-9.c, gcc.dg/c2x-static-assert-1.c, gcc.dg/c2x-static-assert-2.c, gcc.dg/c99-static-assert-2.c, gcc.dg/gnu2x-static-assert-1.c: New tests. * gcc.dg/missing-symbol-3.c: Update expected fix-it text. libcpp/ * include/cpplib.h (enum c_lang): Add CLK_GNUC2X and CLK_STDC2X. * init.c (lang_defaults): Add GNUC2X and STDC2X entries. (cpp_init_builtins): Define __STDC_VERSION__ to 202000L for C2X. From-SVN: r265251 |
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| 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 | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| 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 | ||
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| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
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| README | ||
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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.