![]() macOS SDK headers using the CF_ENUM macro can expand to invalid C++ code of the form: typedef enum T : BaseType T; i.e. an elaborated-type-specifier with an additional enum-base. Upstream LLVM can be made to accept the above construct with -Wno-error=elaborated-enum-base. This patch adds the -Welaborated-enum-base warning to GCC and adjusts the C++ parser to emit this warning instead of rejecting this code outright. The macro expansion in the macOS headers occurs in the case that the compiler declares support for enums with underlying type using __has_feature, see https://gcc.gnu.org/pipermail/gcc-patches/2023-May/618450.html GCC rejecting this construct outright means that GCC fails to bootstrap on Darwin in the case that it (correctly) implements __has_feature and declares support for C++ enums with underlying type. With this patch, GCC can bootstrap on Darwin in combination with the (WIP) __has_feature patch posted at: https://gcc.gnu.org/pipermail/gcc-patches/2023-May/617878.html gcc/c-family/ChangeLog: * c.opt (Welaborated-enum-base): New. gcc/ChangeLog: * doc/invoke.texi: Document -Welaborated-enum-base. gcc/cp/ChangeLog: * parser.cc (cp_parser_enum_specifier): Don't reject elaborated-type-specifier with enum-base, instead emit new Welaborated-enum-base warning. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/enum40.C: Adjust expected diagnostics. * g++.dg/cpp0x/forw_enum6.C: Likewise. * g++.dg/cpp0x/elab-enum-base.C: New test. |
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c++tools | ||
config | ||
contrib | ||
fixincludes | ||
gcc | ||
gnattools | ||
gotools | ||
include | ||
INSTALL | ||
intl | ||
libada | ||
libatomic | ||
libbacktrace | ||
libcc1 | ||
libcody | ||
libcpp | ||
libdecnumber | ||
libffi | ||
libgcc | ||
libgfortran | ||
libgm2 | ||
libgo | ||
libgomp | ||
libiberty | ||
libitm | ||
libobjc | ||
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 | ||
COPYING.LIB | ||
COPYING.RUNTIME | ||
COPYING3 | ||
COPYING3.LIB | ||
depcomp | ||
install-sh | ||
libtool-ldflags | ||
libtool.m4 | ||
ltgcc.m4 | ||
ltmain.sh | ||
ltoptions.m4 | ||
ltsugar.m4 | ||
ltversion.m4 | ||
lt~obsolete.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.