add integer overflow trapping to debug builds

doc: https://gcc.gnu.org/onlinedocs/gcc-4.0.2/gcc/Code-Gen-Options.html

diff --git a/tests/Makefile b/tests/Makefile
index 11d55a75d4dbbc98862a4ef76cddb1193c0228ef..89a109c78f2e021a75984374e4de48204863fd99 100644 (file)
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -32,7 +32,7 @@ CFLAGS     += -Wall -Wextra -Wcast-qual -Wcast-align -Wshadow                 \
               -Wstrict-aliasing=1 -Wswitch-enum -Wdeclaration-after-statement \
               -Wstrict-prototypes -Wundef -Wformat-security                   \
               -Wvla -Wformat=2 -Winit-self -Wfloat-equal -Wwrite-strings      \
-              -Wredundant-decls
+              -Wredundant-decls -ftrapv
 CFLAGS     += $(DEBUGFLAGS) $(MOREFLAGS)
 FLAGS       = $(CPPFLAGS) $(CFLAGS) $(LDFLAGS)