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Tom de Vries 0466831f8b [gdb/build] Reimplement Wstringop-overread workaround
While working on commit 391c402657 ("[gdb] Simplify debuginfod_is_enabled") I
noticed this Wstringop-overread workaround:
...
      url_view = url_view.substr (off);
      /* g++ 11.2.1 on s390x, g++ 11.3.1 on ppc64le and g++ 11 on
	 hppa seem convinced url_view might be of SIZE_MAX length.
	 And so complains because the length of an array can only
	 be PTRDIFF_MAX.  */
      DIAGNOSTIC_PUSH
      DIAGNOSTIC_IGNORE_STRINGOP_OVERREAD
      off = url_view.find_first_of (' ');
      DIAGNOSTIC_POP
...

I had difficulty understanding how the warning got triggered, and why it was
ok to ignore it, so I investigated this and ended up filing a gcc PR [1].

While doing so, I realized that this:
...
-      url_view = url_view.substr (off);
+      url_view = url_view.substr (off, PTRDIFF_MAX);
...
is a simpler workaround, that:
- is not specific to the warning and also
- states explicitly what the assumption is we're making.

I ended up using this instead to make the workaround part more minimal:
...
       url_view = url_view.substr (off);
+      url_view = url_view.substr (0, PTRDIFF_MAX);
       off = url_view.find_first_of (' ');
...

The gcc PR got closed because it's supposed to be fixed in 12.1, so the
workaround is enabled only for g++ < 12.1.

Tested on x86_64-linux.

Approved-By: Tom Tromey <tom@tromey.com>

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124879
2026-04-16 12:55:17 +02:00
bfd Automatic date update in version.in 2026-04-16 00:00:07 +00:00
binutils binutils/readelf: Remove unused static variables 2026-04-09 09:13:44 +01:00
config Support MinGW & 64-bit libraries/paths in Tcl autoconf scripts 2026-04-02 17:00:30 +02:00
contrib [contrib] Accept _("") and operator() in check_GNU_style_lib.py 2025-11-20 10:46:54 +01:00
cpu Fix even more -Wdiscarded-qualifers issues 2026-02-25 06:48:22 -08:00
elfcpp Update year range in copyright notice of binutils files 2026-01-01 23:22:14 +10:30
etc Update year range in copyright notice of binutils files 2026-01-01 23:22:14 +10:30
gas x86/AT&T: make GOT-relative expressions work 2026-04-10 08:43:22 +02:00
gdb [gdb/build] Reimplement Wstringop-overread workaround 2026-04-16 12:55:17 +02:00
gdbserver PR 34052 kill: Terminate inferior with non-zero exit code on Windows 2026-04-14 09:54:20 -06:00
gdbsupport Apply styling to error messages 2026-03-23 12:51:57 -06:00
gnulib gnulib: re-generate Makefile.in 2026-01-06 15:14:50 -05:00
gold [gold] Note gold and dwp deprecation in NEWS 2026-02-05 12:11:34 +01:00
gprof gprof: fix testsuite with older glibc 2026-02-13 10:19:39 +01:00
gprofng gprofng format mismatch on 32-bit host 2026-04-06 10:31:29 +09:30
include Add a "-O 0" option to the linker for a faster, but less effective link. 2026-04-13 09:32:09 +01:00
ld ld: Move "-O 0" option to binutils 2.47 section 2026-04-16 09:43:46 +08:00
libbacktrace tidy m4 plugin config support 2025-11-03 10:59:50 +10:30
libctf libctf: remove CTF_F_ARRNELEMS flag 2026-02-27 15:06:41 +00:00
libdecnumber regen config 2023-08-12 10:27:57 +09:30
libiberty update libiberty changelog 2026-03-09 08:21:49 +10:30
libsframe libsframe testsuite format mismatches on 32-bit host 2026-04-06 10:46:06 +09:30
opcodes aarch64: Remove constraints on sysp operands 2026-04-09 15:34:46 +01:00
readline readline/tcap.h: Update definitions for C23 2025-05-02 12:00:05 -06:00
sim sim/sh: check PFSCR.PR setting for fldi0 and fldi1 insns 2026-03-17 13:49:37 +09:00
texinfo
zlib tidy m4 plugin config support 2025-11-03 10:59:50 +10:30
.clang-format Add .clang-format 2026-02-11 07:53:01 -07:00
.cvsignore
.editorconfig toplevel: unify the GCC and GDB/binutils .editorconfig files 2025-10-01 16:20:29 +01:00
.gitattributes binutils-gdb/git: Handle *.ac and *.m4 files in .gitattributes 2025-12-18 10:00:54 +01:00
.gitignore Add .clang-format 2026-02-11 07:53:01 -07:00
.pre-commit-config.yaml [pre-commit] Bump tclint to 0.8.0 2026-03-24 16:29:17 +01:00
ar-lib
ChangeLog Import the following commits from the master config sources: a2287c3041a3f2a204eb942e09c015eab00dc7dd 973e3e6af23b73a4f1b8d95680454cae22593bf8 3a71dc102953608d4592ec401b519837c28a672a f91a544533876c70f43b9fd51064b2bcf3fa7382 484648c73f3843b256dd011bd415e81594300a0a 7f4149527babe92cb5da1032734f5cb90cefdac5 9f6e0fe8ce04628bbd4a455118ff3f8309a1aef9 2026-01-08 11:20:38 +00:00
compile
config-ml.in MSP430: Add -fno-exceptions multilib 2023-08-12 10:24:26 +09:30
config.guess Import the following commits from the master config sources: a2287c3041a3f2a204eb942e09c015eab00dc7dd 973e3e6af23b73a4f1b8d95680454cae22593bf8 3a71dc102953608d4592ec401b519837c28a672a f91a544533876c70f43b9fd51064b2bcf3fa7382 484648c73f3843b256dd011bd415e81594300a0a 7f4149527babe92cb5da1032734f5cb90cefdac5 9f6e0fe8ce04628bbd4a455118ff3f8309a1aef9 2026-01-08 11:20:38 +00:00
config.rpath
config.sub Import the following commits from the master config sources: a2287c3041a3f2a204eb942e09c015eab00dc7dd 973e3e6af23b73a4f1b8d95680454cae22593bf8 3a71dc102953608d4592ec401b519837c28a672a f91a544533876c70f43b9fd51064b2bcf3fa7382 484648c73f3843b256dd011bd415e81594300a0a 7f4149527babe92cb5da1032734f5cb90cefdac5 9f6e0fe8ce04628bbd4a455118ff3f8309a1aef9 2026-01-08 11:20:38 +00:00
configure AMDGCN: Disable subdirectory configuration for unsupported GAS and LD 2026-02-18 17:32:32 +00:00
configure.ac AMDGCN: Disable subdirectory configuration for unsupported GAS and LD 2026-02-18 17:32:32 +00:00
COPYING
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
COPYING3
COPYING3.LIB
depcomp
djunpack.bat
install-sh
libtool.m4 Binutils/GCC: Add clang LTO support to AR, NM and RANLIB 2025-09-25 12:30:13 +08:00
ltgcc.m4
ltmain.sh ltmain.sh: allow more flags at link-time 2024-09-25 19:06:10 +01:00
ltoptions.m4
ltsugar.m4
ltversion.m4
lt~obsolete.m4
MAINTAINERS Fix compiling bfd/vms-lib.c for a 32-bit host. 2024-03-18 10:26:16 +00:00
Makefile.def Sync top-level with GCC 2025-11-03 09:53:04 +00:00
Makefile.in Sync toplevel files from gcc 2025-10-02 07:42:18 +08:00
Makefile.tpl Sync toplevel files from gcc 2025-10-02 07:42:18 +08:00
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
multilib.am
README README: don't talk about libg++ 2025-09-07 04:06:01 +01:00
README-maintainer-mode
SECURITY.txt Add a SECURITY.txt file describing the GNU Binutils' project's stance on security related bugs. 2023-04-20 16:52:11 +01:00
setup.com
src-release.sh Rename 'binutils' to 'binutils_with_gold'. Rename 'bin_no_gold' to 'binutils'. Add 'gold' 2025-02-04 11:50:02 +00:00
symlink-tree
test-driver
ylwrap

		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README, and so on. That'll give you
info about this package -- supported targets, how to use it, how to report
bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.