From 8371b539e2a4b2fb8470aacf867e230f256f11e4 Mon Sep 17 00:00:00 2001
From: Mark Adler <git@madler.net>
Date: Sun, 8 Feb 2026 10:54:46 -0800
Subject: Allow --const to be used in configure without --warn.

---
 configure | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/configure b/configure
index daa4aa73..27c77c08 100755
--- a/configure
+++ b/configure
@@ -252,11 +252,13 @@ if test "$gcc" -eq 1 && ($cc -c $test.c) >> configure.log 2>&1; then
     SFLAGS="${SFLAGS} -m64"
   fi
   if test "$warn" -eq 1; then
-    if test "$zconst" -eq 1; then
-      CFLAGS="${CFLAGS} -Wall -Wextra -Wcast-qual -DZLIB_CONST"
-    else
-      CFLAGS="${CFLAGS} -Wall -Wextra"
+    CFLAGS="${CFLAGS} -Wall -Wextra"
+  fi
+  if test "$zconst" -eq 1; then
+    if test "$warn" -eq 1; then
+      CFLAGS="${CFLAGS} -Wcast-qual"
     fi
+    CFLAGS="${CFLAGS} -DZLIB_CONST"
   fi
   if test $address -eq 1; then
     CFLAGS="${CFLAGS} -g -fsanitize=address -fno-omit-frame-pointer"
-- 
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