From 942ffdc8572fec5cec89fdd62d76ee76adc20eb4 Mon Sep 17 00:00:00 2001
From: Quinn <quinnthepigeon@proton.me>
Date: Thu, 4 Sep 2025 10:39:30 +0200
Subject: [PATCH] add a flag when debugging to generate SIGFPE when signed
 integer overflow occurs. (this is UB)

---
 makefile | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/makefile b/makefile
index 35b9d1d..0025705 100644
--- a/makefile
+++ b/makefile
@@ -38,14 +38,14 @@ endif
 ifeq ($(DEBUG),1)
 PROF = dbg
 CFLAGS  += -UNDEBUG -Og -g -Wextra -Wpedantic
-CFLAGS  += $(if $(filter 1,$(ISWIN)),,-fsanitize=address,undefined)
-LDFLAGS += $(if $(filter 1,$(ISWIN)),,-fsanitize=address,undefined)
+CFLAGS  += $(if $(filter 1,$(ISWIN)),,-fsanitize=address,undefined) -ftrapv
+LDFLAGS += $(if $(filter 1,$(ISWIN)),,-fsanitize=address,undefined) -ftrapv
 # |--profile: testing
 else ifeq ($(DEBUG),test)
 PROF = test
 CFLAGS  += -UNDEBUG -O2 -g
-CFLAGS  += $(if $(filter 1,$(ISWIN)),,-fsanitize=address)
-LDFLAGS += $(if $(filter 1,$(ISWIN)),,-fsanitize=address)
+CFLAGS  += $(if $(filter 1,$(ISWIN)),,-fsanitize=address) -ftrapv
+LDFLAGS += $(if $(filter 1,$(ISWIN)),,-fsanitize=address) -ftrapv
 else
 PROF = rel
 CFLAGS += -DNDEBUG -O2