using -fsanitize=thread

[Miles Bader <miles at gnu dot org>]

I'm trying to build with -fsanitize=thread (just to try it), witht he
following options:  "-fsanitize=thread -pie"

[I use "-pie" because the _first_ I tried, I got a link error saying
"use -pie" :]

I'm using g++ version: 
g++ (Debian 20130222-1) 4.8.0 20130223 (experimental) [trunk revision
196236]

But I get a link error:
g++-snapshot -O3 -fomit-frame-pointer -flto -ffast-math -march=native -mfpmath=sse -g -std=c++11 -Wall -Wextra -Winit-self -Wdouble-promotion -pedantic-errors -Wno-long-long -fsanitize=thread -pie -fno-finite-math-only -ftrapping-math -fno-associative-math -ffunction-sections -pthread  -Wl,--icf=all  -o snogray snogray.o recover-image.o libsnoglua.a libsnograw.a libluaexts.a -L/usr//lib -lluajit-5.1   libsnogrdrive.a libsnogloaders.a -l3ds libsnogmat.a libsnogsurf.a libsnoglight.a libsnogrender.a libsnogtex.a libsnogspace.a libsnogscene.a libsnogimagecli.a libsnogimage.a -lpng12   -pthread -lIlmImf -lz -lImath -lHalf -lIex -lIlmThread   -ljpeg -lnetpbm libsnogcolor.a libsnogcli.a libsnogutil.a
/usr/lib/gcc-snapshot/lib/gcc/x86_64-linux-gnu/4.8.0/../../../../lib/libasan_preinit.o:asan_preinit.cc:function __asan_preinit: error: undefined reference to '__asan_init_v1'
collect2: error: ld returned 1 exit status

Are there any additional tricks needed to use -fsanitize=thread?

Thanks,

-miles


-- 
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