From 722c196b08df6c9dcbb6eb6eed0bb9732609c511 Mon Sep 17 00:00:00 2001
From: Takeshi ISHII <2170248+mtei@users.noreply.github.com>
Date: Sun, 8 Dec 2019 16:44:54 +0900
Subject: [PATCH] [Keyboard] Added workaround for serial.c/LTO issue for
 helix/rev2 and helix/pico. (#7558)

---
 keyboards/helix/pico/rules.mk | 5 +++++
 keyboards/helix/rev2/rules.mk | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/keyboards/helix/pico/rules.mk b/keyboards/helix/pico/rules.mk
index e916f25f45..d3ad20ccad 100644
--- a/keyboards/helix/pico/rules.mk
+++ b/keyboards/helix/pico/rules.mk
@@ -5,6 +5,11 @@ SRC += local_drivers/serial.c
 SRC += local_drivers/ssd1306.c
 KEYBOARD_PATHS += $(HELIX_TOP_DIR)/local_drivers
 
+# A workaround until #7089 is merged.
+#   serial.c must not be compiled with the -lto option.
+#   The current LIB_SRC has a side effect with the -fno-lto option, so use it.
+LIB_SRC += local_drivers/serial.c
+
 CUSTOM_MATRIX = yes
 
 SRC += pico/matrix.c
diff --git a/keyboards/helix/rev2/rules.mk b/keyboards/helix/rev2/rules.mk
index 4db8f7da94..7357d568c6 100644
--- a/keyboards/helix/rev2/rules.mk
+++ b/keyboards/helix/rev2/rules.mk
@@ -5,6 +5,11 @@ SRC += local_drivers/serial.c
 SRC += local_drivers/ssd1306.c
 KEYBOARD_PATHS += $(HELIX_TOP_DIR)/local_drivers
 
+# A workaround until #7089 is merged.
+#   serial.c must not be compiled with the -lto option.
+#   The current LIB_SRC has a side effect with the -fno-lto option, so use it.
+LIB_SRC += local_drivers/serial.c
+
 CUSTOM_MATRIX = yes
 
 SRC += rev2/matrix.c