From 90c7ae70c68662c671ee1026d1c5abe67026c473 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fabi=C3=A1n=20Gonz=C3=A1lez=20Mart=C3=ADn?=
 <61802930+FabSchwul@users.noreply.github.com>
Date: Sun, 28 Feb 2021 17:01:16 +0100
Subject: [PATCH] Modified tmk_core/rules.mk to avoid linking errors (#10728)

* Modified tmk_core/rules.mk to avoid linking errors

Added -fcommon flag to avoid linking errors due to multiple variable definitions. Though this is neither a definitive nor good solution, proper changes and use of extern  keyword to avoid those multiple definitions must be made

* Comment updated
---
 tmk_core/rules.mk | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tmk_core/rules.mk b/tmk_core/rules.mk
index f5f758943e..bbcfc1e4d1 100644
--- a/tmk_core/rules.mk
+++ b/tmk_core/rules.mk
@@ -108,6 +108,10 @@ endif
 CFLAGS += -Wa,-adhlns=$(@:%.o=%.lst)
 CFLAGS += $(CSTANDARD)
 
+# This fixes lots of keyboards linking errors but SHOULDN'T BE A FINAL SOLUTION
+# Fixing of multiple variable definitions must be made.
+CFLAGS += -fcommon
+
 #---------------- Compiler Options C++ ----------------
 #  -g*:          generate debugging information
 #  -O*:          optimization level
@@ -124,6 +128,7 @@ CXXFLAGS += -O$(OPT)
 CXXFLAGS += -w
 CXXFLAGS += -Wall
 CXXFLAGS += -Wundef
+
 ifneq ($(strip $(ALLOW_WARNINGS)), yes)
     CXXFLAGS += -Werror
 endif