Try using clang instead of gcc.

.github/workflows/ccpp.yml

@@ -102,7 +102,7 @@ jobs:
       run: |
         set -x
         pacman -S --needed --noconfirm pactoys make python diffutils ninja
-        pacboy -S --needed --noconfirm protobuf:p pkg-config:p curl-winssl:p file:p glfw:p gcc:p mbedtls:p sqlite:p freetype:p boost:p
+        pacboy -S --needed --noconfirm protobuf:p pkg-config:p curl-winssl:p file:p glfw:p mbedtls:p sqlite:p freetype:p boost:p clang:p
 
     - name: run
       run: |

Makefile

@@ -10,8 +10,8 @@ export BUILDTYPE
 
 ifeq ($(BUILDTYPE),windows)
 	MINGW = x86_64-w64-mingw32-
-	CC = $(MINGW)gcc
-	CXX = $(MINGW)g++
+	CC = $(MINGW)clang
+	CXX = $(MINGW)clang++
 	CFLAGS += -g -O3 \
 		-ffunction-sections \
 		-fdata-sections \