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Joseph Myers 55e3bd376b c: Default to -std=gnu23
Change the default language version for C compilation from -std=gnu17
to -std=gnu23.  A few tests are updated to remove local definitions of
bool, true and false (where making such an unconditional test change
seemed to make more sense than changing the test conditionally earlier
or building it with -std=gnu17); most test issues were already
addressed in previous patches.  In the case of
ctf-function-pointers-2.c, it was agreed in bug 117289 that it would
be OK to put -std=gnu17 in the test and leave more optimal BTF / CTF
output for this test as a potential future improvement.

Since the original test fixes, more such fixes have become necessary
and so are included in this patch.  More noinline attributes are added
to simulate-thread tests where () meaning a prototype affected test
results, while gcc.dg/torture/pr117496-1.c (a test declaring a
function with () then calling it with arguments) gets -std=gnu17
added.

Bootstrapped with no regressions for x86_64-pc-linux-gnu.

NOTE: it's likely there are target-specific tests for non-x86 targets
that need updating as a result of this change.  See commit
9fb5348e30 ("testsuite: Prepare for
-std=gnu23 default") for examples of changes to prepare the testsuite
to work with a -std=gnu23 default.  In most cases, adding
-Wno-old-style-definition (for warnings for old-style function
definitions) or -std=gnu17 (for other issues such as unprototyped
function declarations with ()) is appropriate, but watch out for cases
that indicate bugs with -std=gnu23 (in particular, any ICEs - there
was only the one nested function test where I had to fix an ICE on
x86_64).

gcc/
	* doc/invoke.texi (-std=gnu17, -std=gnu23): Document -std=gnu23 as
	default for C code.

gcc/c-family/
	* c-opts.cc (c_common_init_options): Default to C23.

gcc/testsuite/
	* c-c++-common/analyzer/asm-x86-dyndbg-2.c,
	c-c++-common/analyzer/asm-x86-lp64-2.c,
	c-c++-common/analyzer/attr-malloc-CVE-2019-19078-usb-leak.c,
	c-c++-common/analyzer/coreutils-cksum-pr108664.c,
	c-c++-common/analyzer/feasibility-3.c,
	c-c++-common/analyzer/pr105783.c, c-c++-common/analyzer/sock-1.c,
	c-c++-common/attributes-4.c, gcc.dg/Warray-bounds-78.c,
	gcc.dg/analyzer/asm-x86-dyndbg-1.c: Do not define bool, true or
	false.
	* gcc.dg/debug/ctf/ctf-function-pointers-2.c: Use -std-gnu17.
	* gcc.dg/gnu23-version-2.c: New test.
	* gcc.dg/simulate-thread/atomic-load-int.c,
	gcc.dg/simulate-thread/atomic-load-longlong.c,
	gcc.dg/simulate-thread/atomic-load-short.c: Add more noinline
	attributes.
	* gcc.dg/torture/pr117496-1.c: Use -std=gnu17.
2024-11-15 23:45:57 +00:00
.forgejo top-level: Add pull request template for Forgejo 2024-10-23 19:45:09 +01:00
.github
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gcc c: Default to -std=gnu23 2024-11-15 23:45:57 +00:00
gnattools Daily bump. 2024-07-08 00:17:01 +00:00
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include Daily bump. 2024-11-02 00:19:21 +00:00
INSTALL
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libbacktrace Daily bump. 2024-10-26 00:19:39 +00:00
libcc1 Daily bump. 2024-09-21 00:16:55 +00:00
libcody
libcpp c: Add _Decimal64x support 2024-11-15 08:43:48 +01:00
libdecnumber Daily bump. 2024-04-03 00:17:29 +00:00
libffi Daily bump. 2024-10-26 00:19:39 +00:00
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libgfortran Daily bump. 2024-10-08 00:19:04 +00:00
libgm2 Daily bump. 2024-05-30 00:16:44 +00:00
libgo syscall: don't define syscall stub on Hurd 2024-10-30 11:33:07 -07:00
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libsanitizer libsanitizer: Update LOCAL_PATCHES 2024-11-12 21:59:49 +08:00
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zlib
.b4-config Add config file so b4 uses inbox.sourceware.org automatically 2024-07-28 11:13:16 +01:00
.dir-locals.el dir-locals: apply our C settings in C++ also 2024-07-31 20:38:27 +02:00
.gitattributes
.gitignore Git ignores .vscode 2024-09-12 22:51:00 +08:00
ABOUT-NLS
ar-lib
ChangeLog Daily bump. 2024-11-06 00:18:35 +00:00
ChangeLog.jit
ChangeLog.tree-ssa
compile
config-ml.in config-ml.in: Fix multi-os-dir search 2024-05-06 12:08:28 +08:00
config.guess
config.rpath
config.sub
configure Deprecate the ARM simulator 2024-11-05 13:12:07 +00:00
configure.ac Deprecate the ARM simulator 2024-11-05 13:12:07 +00:00
COPYING
COPYING.LIB
COPYING.RUNTIME
COPYING3
COPYING3.LIB
depcomp
install-sh
libtool-ldflags
libtool.m4
ltgcc.m4
ltmain.sh ltmain.sh: allow more flags at link-time 2024-09-25 19:05:24 +01:00
ltoptions.m4
ltsugar.m4
ltversion.m4
lt~obsolete.m4
MAINTAINERS [MAINTAINERS] Add myself to write after approval and DCO. 2024-10-30 14:31:09 +05:30
Makefile.def
Makefile.in Makefile.tpl: fix whitespace in licence header 2024-08-22 03:41:12 +01:00
Makefile.tpl Makefile.tpl: fix whitespace in licence header 2024-08-22 03:41:12 +01:00
missing
mkdep
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multilib.am
README
SECURITY.txt
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.