From 5a157eb3703e1e65ed285f13a824562ab12aa3ff Mon Sep 17 00:00:00 2001
From: Luke Dashjr <luke-jr+git@utopios.org>
Date: Tue, 22 Mar 2022 14:13:13 +0000
Subject: [PATCH] Bugfix: configure: Only avoid -isystem for exact /usr/include
 path

---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index db283347cd7..430ed75e075 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1175,7 +1175,7 @@ dnl Do not change "-I/usr/include" to "-isystem /usr/include" because that
 dnl is not necessary (/usr/include is already a system directory) and because
 dnl it would break GCC's #include_next.
 AC_DEFUN([SUPPRESS_WARNINGS],
-         [[$(echo $1 |${SED} -E -e 's/(^| )-I/\1-isystem /g' -e 's;-isystem /usr/include([/ ]|$);-I/usr/include\1;g')]])
+         [[$(echo $1 |${SED} -E -e 's/(^| )-I/\1-isystem /g' -e 's;-isystem /usr/include/*( |$);-I/usr/include\1;g')]])
 
 dnl enable-fuzz should disable all other targets
 if test "x$enable_fuzz" = "xyes"; then