As described in http://code.google.com/p/address-sanitizer/wiki/AddressSanitizer#Getting
,
I checked out the sources and they compile my simple helloworld-style app fine with
-O1/-O2:

$ ~/asan/asan_clang_Linux/bin/clang -O2 -fasan -g -m32 simple_oob.cpp -o simple_oob_asan
$ ~/asan/asan_clang_Linux/bin/clang -O1 -fasan -g -m32 simple_oob.cpp -o simple_oob_asan
$ ~/asan/asan_clang_Linux/bin/clang -O0 -fasan -g -m32 simple_oob.cpp -o simple_oob_asan
~/asan_clang_Linux/bin/../lib/libasan32.a(asan_rtl32.o): In function `Global::DescribeAddrIfMyRedZone(unsigned
int)':
~/asan/asan_rtl.cc:305: undefined reference to `__asan_mapping_scale'
~/asan_clang_Linux/bin/../lib/libasan32.a(asan_rtl32.o): In function `AddrIsInLowMem':
~/asan/asan_mapping.h:60: undefined reference to `__asan_mapping_offset'
~/asan_clang_Linux/bin/../lib/libasan32.a(asan_rtl32.o): In function `AddrIsInHighMem':
~/asan/asan_mapping.h:68: undefined reference to `__asan_mapping_scale'
[many more...]
clang: error: linker command failed with exit code 1 (use -v to see invocation)