From 7a6f9eeb3b9bf987ef7c6bbe1082a6553c5a3300 Mon Sep 17 00:00:00 2001
From: Gene Hightower <gene@digilicious.com>
Date: Mon, 26 Mar 2018 09:15:04 -0700
Subject: [PATCH] allow for easy override of problematic options

---
 rules | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/rules b/rules
index 74aa954..2cfeadd 100644
--- a/rules
+++ b/rules
@@ -96,19 +96,23 @@ warnings_cpp := \
  -Wuseless-cast
 endif
 
-opt_flags := -O3
+##############################################################################
 
-safty_flags := -fsanitize=address -fsanitize=undefined -fsanitize-address-use-after-scope
+opt_flags ?= -O3
 
-visibility_flags := -fvisibility=hidden
+safty_flags ?= -fsanitize=address -fsanitize=undefined -fsanitize-address-use-after-scope
+
+visibility_flags ?= -fvisibility=hidden
+
+lto_flags ?= -flto
+
+##############################################################################
 
 cstd_flags := -std=c11
 cxxstd_flags := -std=c++17
 
 dep_flags := -MMD
 
-lto_flags := -flto
-
 CFLAGS   += $(lto_flags)   $(cstd_flags)   $(warnings_c) $(dep_flags) $(visibility_flags) $(opt_flags) $(safty_flags)
 CXXFLAGS += $(lto_flags) $(cxxstd_flags) $(warnings_cpp) $(dep_flags) $(visibility_flags) $(opt_flags) $(safty_flags)
 
-- 
2.11.4.GIT