--- a/Makefile
+++ b/Makefile
@@ -31,11 +31,11 @@ S_SRC+= src/tls_$(TLS_BACKEND).c
 FEATURES=
 FEATURES_INC=
 
-CFLAGS+=-Wall -Werror -Wstrict-prototypes -Wmissing-prototypes
+CFLAGS+=-Wall -Wstrict-prototypes -Wmissing-prototypes
 CFLAGS+=-Wmissing-declarations -Wshadow -Wpointer-arith -Wcast-qual
 CFLAGS+=-Wsign-compare -Iinclude/kore -I$(OBJDIR) -std=c99 -pedantic
 CFLAGS+=-Wtype-limits -fno-common
-CFLAGS+=-DPREFIX='"$(PREFIX)"' -fstack-protector-all
+CFLAGS+=-DPREFIX='"$(PREFIX)"'
 
 LDFLAGS+=-rdynamic
 
@@ -69,7 +69,7 @@ endif
 ifneq ("$(NOOPT)", "")
 	CFLAGS+=-O0
 else
-	CFLAGS+=-O2
+	CFLAGS+=
 endif
 
 ifneq ("$(NOSENDFILE)", "")
@@ -155,7 +155,7 @@ ifeq ("$(OSNAME)", "darwin")
 	endif
 	S_SRC+=src/bsd.c
 else ifeq ("$(OSNAME)", "linux")
-	CFLAGS+=-D_GNU_SOURCE=1 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2
+	CFLAGS+=-D_GNU_SOURCE=1
 	LDFLAGS+=-ldl
 	S_SRC+=src/linux.c src/seccomp.c
 else