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GCC bug 119085 fixed in GCC 16

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* configure.ac (emacs_cv_gcc_bug_119085_CFLAGS):
Assume the bug is fixed starting in GCC 16.
This commit is contained in:
Paul Eggert 2025-07-23 12:55:13 -07:00
parent 128e8311be
commit 69af0d4c85
1 changed files with 7 additions and 9 deletions
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16
configure.ac
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@ -2219,8 +2219,7 @@ AC_CACHE_CHECK([for flag to work around GCC bug 119085],
[emacs_cv_gcc_bug_119085_CFLAGS='none needed'
AS_IF([test "$GCC" = yes],
[old_CFLAGS=$CFLAGS
# If no flags are needed (e.g., not GCC 4+), don't use any.
# Otherwise, use -fno-tree-sra.
# Use -fno-tree-sra if GCC 4 through 15.
for emacs_cv_gcc_bug_119085_CFLAGS in \
'none needed' -fno-tree-sra
do
@ -2232,13 +2231,13 @@ AC_CACHE_CHECK([for flag to work around GCC bug 119085],
[AC_LANG_DEFINES_PROVIDED
[/* Work around GCC bug 119085 with unions containing holes:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119085
GCC bug 119085 is present even in GCC 15.1,
the current version as of this writing; for now,
assume it is present in all GCC versions starting with GCC 4.
Although GCC bug 119085 is present in GCC 15.1,
as of 2025-07-23 a patch is in the works for GCC 16;
for now, assume the bug exists in GCC versions 4 through 15.
Working around GCC bug 119095 also works around GCC bug 117423
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117423
which as of 2025-07-17 has a fix that has not been released.
which as of 2025-07-23 is planned to be fixed in GCC 15.2.
Working wround GCC bug 119085 also works around GCC bug 58416
with double in unions on x86, where the generated insns
@ -2249,9 +2248,8 @@ AC_CACHE_CHECK([for flag to work around GCC bug 119085],
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71460
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93271
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114659
Although GCC bug 58416 is fixed in GCC 15.1,
GCC bug 119085 is still present there. */
#if 4 <= __GNUC__ && !defined __clang__
GCC bug 58416 is fixed in GCC 15.1. */
#if 4 <= __GNUC__ && __GNUC__ <= 15 && !defined __clang__
# error "GCC bug 119085 possibly present"
#endif
]],