From 87195cbcf477692c7e631344107e2fb148535c54 Mon Sep 17 00:00:00 2001
From: EangJS <eugeneang654871@gmail.com>
Date: Wed, 12 Nov 2025 13:10:54 +0800
Subject: [PATCH] os/board/rtl8730e: Optimize the CFLAGS length

Generate a response file containing all the CFLAGS instead of loading an entire CFLAGS string directly.

---

> Before
CFLAGS length: 3777 / 4096

> After
CFLAGS length: 28 / 4096

Built with before and after modification, MD5 sum of TizenRT/build/output/bin/kernel_rtl8730e_200204.trpk match.
---
 os/board/rtl8730e/src/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/os/board/rtl8730e/src/Makefile b/os/board/rtl8730e/src/Makefile
index b72863586d..b1b31950a0 100644
--- a/os/board/rtl8730e/src/Makefile
+++ b/os/board/rtl8730e/src/Makefile
@@ -218,6 +218,11 @@ else
   
 endif
 
+# Generate response file containing all CFLAGS
+CFLAGS_FILE := $(TOPDIR)/cflags.rsp
+$(shell printf "%s" "$(CFLAGS)" > $(CFLAGS_FILE))
+CFLAGS := @$(CFLAGS_FILE)
+
 all: libboard$(LIBEXT)
 
 $(AOBJS): %$(OBJEXT): %$(ASMEXT)