disable sanitize

Makefile

@@ -14,5 +14,6 @@ lint:
 
 readme:
 	pandoc -f org -t markdown README.org -o README.md
+	sed -i 's/{.verbatim}//g' README.md
 
 .PHONY: build clean fix lint readme

README.org

@@ -43,7 +43,10 @@ Then you can invoke =zigcc= =zigcxx= =zigcargo= in following steps.
 
 * Config
 There some are env variable to config zigcc:
-- =ZIGCC_FLAGS=, space separated flags, pass to zig cc. An example is set this to =-fno-sanitize=undefined= to disable sanitize since they may break your programs. See [[https://nathancraddock.com/blog/zig-cc-undefined-behavior/][Catching undefined behavior with zig cc]]
+- =ZIGCC_FLAGS=, space separated flags, pass to zig cc.
+- =ZIGCC_ENABLE_SANITIZE= By default Zig will pass =-fsanitize=undefined -fsanitize-trap=undefined= to clang when compile without =-O2=, =-O3=, this causes Undefined Behavior to cause an Illegal Instruction, see [[https://nathancraddock.com/blog/zig-cc-undefined-behavior/][Catching undefined behavior with zig cc]].
+
+  So we disable it by default, set this variable to =1= to re-enable it.
 - =ZIGCC_BLACKLIST_FLAGS=, space separated flags, used to filter flags =zig cc= don't support, such as =-Wl,-dylib= otherwise you could see errors below
   #+begin_src bash
   note: error: unsupported linker arg: -dylib

zigcc/__init__.py

@@ -11,21 +11,24 @@
 #
 # Supported env vars:
 # 1. `ZIGCC_VERBOSE`, enable verbose log
-# 2. `ZIGCC_FLAGS`, extra flags passed to zig, such as `-fno-sanitize=undefined`
+# 2. `ZIGCC_FLAGS`, extra flags passed to zig
 
 import sys
 import os
 import logging
 import subprocess
 
-__VERSION__ = '1.0.0'
+__VERSION__ = '1.0.1'
 
 UNKNOWN = 0
 RUST = 1
 GO = 2
 ENABLE_LOG = os.getenv('ZIGCC_VERBOSE', '0') == '1'
+ENABLE_SANITIZE = os.getenv('ZIGCC_ENABLE_SANITIZE', '0') == '1'
 APPEND_SYSROOT = os.getenv('ZIGCC_APPEND_SYSROOT', '0') == '1'
-FLAGS = os.getenv('ZIGCC_FLAGS', '').split(' ')
+FLAGS = os.getenv(
+    'ZIGCC_FLAGS', '' if ENABLE_SANITIZE else '-fno-sanitize=undefined'
+).split(' ')
 FLAGS = [f for f in FLAGS if f != '']
 
 # Blacklist flags, wild match