[openwrt/openwrt] ravpower-mcu: add CPPFLAGS

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/ddb1c1ab330cb88ca9c58ba6c33d55e6dc70f240

commit ddb1c1ab330cb88ca9c58ba6c33d55e6dc70f240
Author: Hauke Mehrtens <hauke at hauke-m.de>
AuthorDate: Tue Feb 17 00:55:27 2026 +0100

    ravpower-mcu: add CPPFLAGS
    
    Forward the OpenWrt CPPFLAGS to the compile process. This fixes fortify
    sources support.
    
    Link: https://github.com/openwrt/openwrt/pull/22056
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 package/utils/ravpower-mcu/Makefile                           |  4 +++-
 .../utils/ravpower-mcu/patches/001-fix-compile-flags.patch    | 11 +++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/package/utils/ravpower-mcu/Makefile b/package/utils/ravpower-mcu/Makefile
index 8139e1bf87..45734a24e8 100644
--- a/package/utils/ravpower-mcu/Makefile
+++ b/package/utils/ravpower-mcu/Makefile
@@ -23,7 +23,9 @@ endef
 define Build/Compile
 	$(MAKE) -C $(PKG_BUILD_DIR) \
 		CC="$(TARGET_CC)" \
-		CFLAGS="$(TARGET_CFLAGS) -Wall"
+		CFLAGS="$(TARGET_CFLAGS) -Wall" \
+		CPPFLAGS="$(TARGET_CPPFLAGS)" \
+		LDFLAGS="$(TARGET_LDFLAGS)"
 endef
 
 define Package/ravpower-mcu/install
diff --git a/package/utils/ravpower-mcu/patches/001-fix-compile-flags.patch b/package/utils/ravpower-mcu/patches/001-fix-compile-flags.patch
new file mode 100644
index 0000000000..07ac662fa1
--- /dev/null
+++ b/package/utils/ravpower-mcu/patches/001-fix-compile-flags.patch
@@ -0,0 +1,11 @@
+--- a/src/Makefile
++++ b/src/Makefile
+@@ -3,7 +3,7 @@ CFLAGS:=-I.
+ OUTDIR:=./
+ 
+ main: main.c
+-	$(CC) -o $(OUTDIR)/ravpower-mcu main.c
++	$(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -o $(OUTDIR)/ravpower-mcu main.c
+ 
+ clean:
+ 	rm ravpower-pmic