From c130d3e420f6fae922e3f97681310ba307ab81b4 Mon Sep 17 00:00:00 2001
From: Scott Myron <samyron@gmail.com>
Date: Sun, 19 Jul 2026 21:12:05 -0500
Subject: [PATCH] Pass '-mno-outline' to the compiler (if supported) to prevent
 function outlining.

---
 ext/json/ext/parser/extconf.rb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ext/json/ext/parser/extconf.rb b/ext/json/ext/parser/extconf.rb
index a0358ccc..18aa546a 100644
--- a/ext/json/ext/parser/extconf.rb
+++ b/ext/json/ext/parser/extconf.rb
@@ -30,6 +30,12 @@
 
 append_cflags("-std=c99")
 
+# Disable function outlining on clang to prevent some of the repeated instructions
+# in json_eat_whitespace being outlined into function calls.
+# Note: This verifies '-mno-outline' is accepted as a valid compiler flag
+# and will not pass it if unsupported.
+append_cflags("-mno-outline")
+
 if enable_config('parser-use-simd', default=!ENV["JSON_DISABLE_SIMD"])
   load __dir__ + "/../simd/conf.rb"
 end