File gcc10.patch of Package blastem

diff -Nura blastem.old/Makefile blastem.new/Makefile
--- blastem.old/Makefile	2019-03-28 08:34:53.000000000 +0200
+++ blastem.new/Makefile	2022-10-10 13:15:20.754272458 +0300
@@ -23,7 +23,7 @@
 NET:=net_win.o
 EXE:=.exe
 CC:=i686-w64-mingw32-gcc-win32
-CFLAGS:=-std=gnu99 -Wreturn-type -Werror=return-type -Werror=implicit-function-declaration -I"$(SDL2_PREFIX)/include/SDL2" -I"$(GLEW_PREFIX)/include" -DGLEW_STATIC
+CFLAGS:=-fcommon -std=gnu99 -Wreturn-type -Werror=return-type -Werror=implicit-function-declaration -I"$(SDL2_PREFIX)/include/SDL2" -I"$(GLEW_PREFIX)/include" -DGLEW_STATIC
 LDFLAGS:= $(GLEW32S_LIB) -L"$(SDL2_PREFIX)/lib" -lm -lmingw32 -lSDL2main -lSDL2 -lws2_32 -lopengl32 -lglu32 -mwindows
 CPU:=i686
 LIBZOBJS=$(BUNDLED_LIBZ)
@@ -36,7 +36,7 @@
 EXE:=
 
 HAS_PROC:=$(shell if [ -d /proc ]; then /bin/echo -e -DHAS_PROC; fi)
-CFLAGS:=-std=gnu99 -Wreturn-type -Werror=return-type -Werror=implicit-function-declaration -Wno-unused-value $(HAS_PROC) -DHAVE_UNISTD_H
+CFLAGS:=-fcommon -std=gnu99 -Wreturn-type -Werror=return-type -Werror=implicit-function-declaration -Wno-unused-value $(HAS_PROC) -DHAVE_UNISTD_H
 
 ifeq ($(OS),Darwin)
 LIBS=sdl2 glew