diff --git a/Makefile b/Makefile
index fde014f815..2611eed2ef 100644
--- a/Makefile
+++ b/Makefile
@@ -14,6 +14,8 @@ MODERN      ?= 1
 COMPARE     ?= 0
 # Executes the Test Runner System that checks that all mechanics work as expected
 TEST         ?= 0
+# Count unused warnings as errors. Used by RH-Hideout's repo
+UNUSED_ERROR ?= 0
 
 ifeq (agbcc,$(MAKECMDGOALS))
   MODERN := 0
@@ -129,7 +131,13 @@ else
   MODERNCC := $(PREFIX)gcc
   PATH_MODERNCC := PATH="$(PATH)" $(MODERNCC)
   CC1 := $(shell $(PATH_MODERNCC) --print-prog-name=cc1) -quiet
-  override CFLAGS += -mthumb -mthumb-interwork -O$(O_LEVEL) -mabi=apcs-gnu -mtune=arm7tdmi -march=armv4t -fno-toplevel-reorder -Wno-pointer-to-int-cast
+  override CFLAGS += -mthumb -mthumb-interwork -O$(O_LEVEL) -mabi=apcs-gnu -mtune=arm7tdmi -march=armv4t -fno-toplevel-reorder -Wno-pointer-to-int-cast -std=gnu17 -Werror -Wall -Wno-strict-aliasing -Wno-attribute-alias -Woverride-init
+  # Only throw an error for unused elements if its RH-Hideout's repo
+  ifeq ($(UNUSED_ERROR),0)
+    ifneq ($(GITHUB_REPOSITORY_OWNER),rh-hideout)
+      override CFLAGS += -Wno-error=unused-variable -Wno-error=unused-const-variable -Wno-error=unused-parameter -Wno-error=unused-function -Wno-error=unused-but-set-parameter -Wno-error=unused-but-set-variable -Wno-error=unused-value -Wno-error=unused-local-typedefs
+    endif
+  endif
   LIBPATH := -L "$(dir $(shell $(PATH_MODERNCC) -mthumb -print-file-name=libgcc.a))" -L "$(dir $(shell $(PATH_MODERNCC) -mthumb -print-file-name=libnosys.a))" -L "$(dir $(shell $(PATH_MODERNCC) -mthumb -print-file-name=libc.a))"
   LIB := $(LIBPATH) -lc -lnosys -lgcc -L../../libagbsyscall -lagbsyscall
 endif