GCC bug 117423 has a fix

Document the change in dependency.  As we still need to work
around GCC bug 119085, there is no functional change in ‘configure’.
* configure.ac (emacs_cv_gcc_bug_119085_CFLAGS):
Rename from emacs_cv_gcc_bug_117423_CFLAGS.  All uses changed.

1 files changed, 17 insertions, 14 deletions

diff --git a/configure.ac b/configure.ac
index 332bc6e7bd9..94c1c590936 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2214,30 +2214,33 @@ esac
 
 C_SWITCH_MACHINE=
 
-AC_CACHE_CHECK([for flag to work around GCC bug 117423],
-  [emacs_cv_gcc_bug_117423_CFLAGS],
-  [emacs_cv_gcc_bug_117423_CFLAGS='none needed'
+AC_CACHE_CHECK([for flag to work around GCC bug 119085],
+  [emacs_cv_gcc_bug_119085_CFLAGS],
+  [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.
-      for emacs_cv_gcc_bug_117423_CFLAGS in \
+      for emacs_cv_gcc_bug_119085_CFLAGS in \
           'none needed' -fno-tree-sra
       do
-        AS_CASE([$emacs_cv_gcc_bug_117423_CFLAGS],
+        AS_CASE([$emacs_cv_gcc_bug_119085_CFLAGS],
           ['none needed'], [],
           [-fno-tree-sra], [break],
-          [CFLAGS="$old_CFLAGS $emacs_cv_gcc_bug_117423_CFLAGS"])
+          [CFLAGS="$old_CFLAGS $emacs_cv_gcc_bug_119085_CFLAGS"])
         AC_COMPILE_IFELSE(
           [AC_LANG_DEFINES_PROVIDED
-           [/* Work around GCC bug 117423 with unions containing holes:
-               https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117423
+           [/* Work around GCC bug 119085 with unions containing holes:
                https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119085
-               GCC bug 117423 is present even in GCC 15.1,
+               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.
 
-               Working wround GCC bug 117423 also works around GCC bug 58416
+               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.
+
+               Working wround GCC bug 119085 also works around GCC bug 58416
                with double in unions on x86, where the generated insns
                copy non-floating-point data via fldl/fstpl instruction pairs.
                This can misbehave if the data's bit pattern looks like a NaN.
@@ -2247,17 +2250,17 @@ AC_CACHE_CHECK([for flag to work around GCC bug 117423],
                  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 117423 is still present there.  */
+               GCC bug 119085 is still present there.  */
             #if 4 <= __GNUC__ && !defined __clang__
-            # error "GCC bug 117423 possibly present"
+            # error "GCC bug 119085 possibly present"
             #endif
           ]],
           [break])
       done
       CFLAGS=$old_CFLAGS])])
-AS_CASE([$emacs_cv_gcc_bug_117423_CFLAGS],
+AS_CASE([$emacs_cv_gcc_bug_119085_CFLAGS],
   [-*],
-    [C_SWITCH_MACHINE="$C_SWITCH_MACHINE $emacs_cv_gcc_bug_117423_CFLAGS"])
+    [C_SWITCH_MACHINE="$C_SWITCH_MACHINE $emacs_cv_gcc_bug_119085_CFLAGS"])
 
 AC_SUBST([C_SWITCH_MACHINE])