[PATCH] manywarnings: -Wstrict-overflow is deprecated

Issue reported by Drea Pinski in:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101913#c6
* HACKING: Stop recommending -Wstrict-overflow.
* build-aux/g++-warning.spec:
* build-aux/gcc-warning.spec: Say -Wstrict-overflow is deprecated.
* doc/manywarnings.texi (manywarnings): Stop mentioning it.
* m4/manywarnings-c++.m4 (gl_MANYWARN_ALL_GCC_CXX_IMPL):
* m4/manywarnings.m4 (gl_MANYWARN_ALL_GCC):
Stop using it.
---
 ChangeLog                  | 13 +++++++++++++
 HACKING                    |  2 --
 build-aux/g++-warning.spec |  2 +-
 build-aux/gcc-warning.spec |  3 ++-
 doc/manywarnings.texi      |  3 +--
 m4/manywarnings-c++.m4     |  1 -
 m4/manywarnings.m4         |  1 -
 7 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 838fcc0d63..977c787a34 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2026-05-28  Paul Eggert  <[email protected]>
+
+	manywarnings: -Wstrict-overflow is deprecated
+	Issue reported by Drea Pinski in:
+	https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101913#c6
+	* HACKING: Stop recommending -Wstrict-overflow.
+	* build-aux/g++-warning.spec:
+	* build-aux/gcc-warning.spec: Say -Wstrict-overflow is deprecated.
+	* doc/manywarnings.texi (manywarnings): Stop mentioning it.
+	* m4/manywarnings-c++.m4 (gl_MANYWARN_ALL_GCC_CXX_IMPL):
+	* m4/manywarnings.m4 (gl_MANYWARN_ALL_GCC):
+	Stop using it.
+
 2026-05-27  Bruno Haible  <[email protected]>
 
 	fma: Work around glibc 2.43 regression.
diff --git a/HACKING b/HACKING
index 33628eafc0..f622b8be95 100644
--- a/HACKING
+++ b/HACKING
@@ -315,7 +315,6 @@ there are three possible approaches:
       -Woverlength-strings
       -Wpacked
       -Wpointer-arith
-      -Wstrict-overflow
       -Wsuggest-final-methods
       -Wsuggest-final-types
       -Wsync-nand
@@ -399,7 +398,6 @@ there are three possible approaches:
       -Woverlength-strings
       -Wpacked
       -Wpointer-arith
-      -Wstrict-overflow
       -Wsuggest-attribute=format
       -Wsuggest-final-methods
       -Wsuggest-final-types
diff --git a/build-aux/g++-warning.spec b/build-aux/g++-warning.spec
index 2235d65e60..7d83432ef8 100644
--- a/build-aux/g++-warning.spec
+++ b/build-aux/g++-warning.spec
@@ -78,7 +78,7 @@
 -Wsign-conversion			FIXME maybe? borderline.  some will want this
 -Wstack-usage=				FIXME: choose something sane?
 -Wstrict-aliasing=			FIXME: choose something sane?
--Wstrict-overflow=			FIXME: choose something sane?
+-Wstrict-overflow=			deprecated and slated for removal
 -Wstrict-prototypes			c
 -Wstrict-selector-match			objc and objc++
 -Wsurprising				fortran
diff --git a/build-aux/gcc-warning.spec b/build-aux/gcc-warning.spec
index f0843acc49..6bf931808e 100644
--- a/build-aux/gcc-warning.spec
+++ b/build-aux/gcc-warning.spec
@@ -246,7 +246,8 @@
 -Wstack-usage=<byte-size>		FIXME: choose something sane?
 -Wstrict-aliasing			enabled by -Wall
 -Wstrict-aliasing=<0,3>			FIXME: choose something sane?
--Wstrict-overflow=<0,5>			FIXME: choose something sane?
+-Wstrict-overflow			deprecated and slated for removal
+-Wstrict-overflow=<0,5>			deprecated and slated for removal
 -Wstring-compare			enabled by -Wextra
 -Wstringop-overflow			covered by -Wstringop-overflow=2
 -Wstringop-overflow=<0,4>		defaults to 2
diff --git a/doc/manywarnings.texi b/doc/manywarnings.texi
index 76ab0d1a76..27f52c2194 100644
--- a/doc/manywarnings.texi
+++ b/doc/manywarnings.texi
@@ -23,7 +23,6 @@ manywarnings
                                 # dangerous than casting any other value.
    nw="$nw -Winline"            # It's OK to not inline.
    nw="$nw -Wsign-compare"      # Too many false alarms.
-   nw="$nw -Wstrict-overflow"   # It's OK to optimize strictly.
    nw="$nw -Wsystem-headers"    # Don't warn in system headers.
 
    # Setup the list of meaningful warning options for the C compiler.
@@ -64,7 +63,7 @@ manywarnings
 @item
 Start with the newest major release of GCC.
 This will save you time, because some warning options produce many false
-alarms with older versions of GCC (such as @code{-Wstrict-overflow} or
+alarms with older versions of GCC (such as
 @code{-Wunsafe-loop-optimizations}).
 @item
 Consider the platforms commonly used when enabling GCC warnings.
diff --git a/m4/manywarnings-c++.m4 b/m4/manywarnings-c++.m4
index a73f33f245..8c59d21500 100644
--- a/m4/manywarnings-c++.m4
+++ b/m4/manywarnings-c++.m4
@@ -169,7 +169,6 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC_CXX_IMPL]
     -Wstack-protector \
     -Wstrict-aliasing \
     -Wstrict-null-sentinel \
-    -Wstrict-overflow \
     -Wsuggest-attribute=const \
     -Wsuggest-attribute=format \
     -Wsuggest-attribute=noreturn \
diff --git a/m4/manywarnings.m4 b/m4/manywarnings.m4
index ea0442d039..536d7d328c 100644
--- a/m4/manywarnings.m4
+++ b/m4/manywarnings.m4
@@ -133,7 +133,6 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC(C
     -Wshadow \
     -Wstack-protector \
     -Wstrict-flex-arrays \
-    -Wstrict-overflow \
     -Wstrict-prototypes \
     -Wsuggest-attribute=cold \
     -Wsuggest-attribute=const \
-- 
2.54.0