From abd0b9b28a8179687ff424fabcaf48bb3843e802 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 6 Sep 2023 14:06:26 +0900
Subject: [PATCH] Exclude `-Wmisleading-indentation` when `-save-temps`

That option may be triggered wrongly by pre-processed files.
---
 configure.ac | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 8447eba105..122e061792 100644
--- a/configure.ac
+++ b/configure.ac
@@ -682,6 +682,10 @@ AS_CASE(["$GCC:${warnflags+set}:${extra_warnflags:+set}:"],
     AS_IF([test $gcc_major -le 6], [
 	extra_warnflags="$extra_warnflags -Wno-maybe-uninitialized"
     ])
+    AS_CASE([ $CFLAGS ], [*" -save-temps="*|*" -save-temps "*], [], [
+	extra_warnflags="$extra_warnflags -Werror=misleading-indentation"
+    ])
+
     # ICC doesn't support -Werror=
     AS_IF([test $icc_version -gt 0], [
 	particular_werror_flags=no
@@ -693,7 +697,6 @@ AS_CASE(["$GCC:${warnflags+set}:${extra_warnflags:+set}:"],
 		 -Werror=duplicated-cond \
 		 -Werror=implicit-function-declaration \
 		 -Werror=implicit-int \
-		 -Werror=misleading-indentation \
 		 -Werror=pointer-arith \
 		 -Werror=shorten-64-to-32 \
 		 -Werror=write-strings \