[cfe-dev] Link error compiling with -faddress-sanitizer (___asan_init undefined)

[Kostya Serebryany]

For some reason the asan run-time library does not get added to the link
command.
It worked for me yesterday, but today my only Mac box is down, so I can't
check immediately.
The code that should add the run-time library is
in tools/clang/lib/Driver/ToolChains.cpp (search for address_sanitizer),
I'll try to check it later today once my Mac box is up.

Does your clang build contain library called "libclang_rt.asan_osx.a"? You
can probably try adding it manually.

--kcc



On Tue, Mar 13, 2012 at 12:12 PM, Sean McBride <sean at rogue-research.com>wrote:

> On Tue, 13 Mar 2012 12:03:09 -0700, Kostya Serebryany said:
>
> >Could you please run the same command line with "-v" to see what libraries
> >get linked in?
>
> Kostya,
>
> Thanks for the fast reply.  Here is the whole thing:
>
> builder9:~ builder$ clang -O1 -g -faddress-sanitizer
> -fno-omit-frame-pointer ~/Desktop/test.c -v
> clang version 3.1 (trunk 152633)
> Target: x86_64-apple-darwin10.8.0
> Thread model: posix
>  "/Users/builder/llvm/llvm-rel-bin-install/bin/clang-3.1" -cc1 -triple
> x86_64-apple-macosx10.6.0 -emit-obj -disable-free -disable-llvm-verifier
> -main-file-name test.c -pic-level 1 -mdisable-fp-elim -masm-verbose
> -munwind-tables -target-cpu core2 -v -g -resource-dir
> /Users/builder/llvm/llvm-rel-bin-install/bin/../lib/clang/3.1
> -fmodule-cache-path
> /var/folders/So/SoDaKVGNF1GdaUhl-VCLoE+++TI/-Tmp-/clang-module-cache -O1
> -fdebug-compilation-dir /Users/builder -ferror-limit 19 -fmessage-length
> 179 -faddress-sanitizer -stack-protector 1 -mstackrealign -fblocks
> -fobjc-dispatch-method=mixed -fobjc-default-synthesize-properties
> -fdiagnostics-show-option -fcolor-diagnostics -o
> /var/folders/So/SoDaKVGNF1GdaUhl-VCLoE+++TI/-Tmp-/test-cnlcGw.o -x c
> /Users/builder/Desktop/test.c
> clang -cc1 version 3.1 based upon LLVM 3.1svn default target
> x86_64-apple-darwin10.8.0
> #include "..." search starts here:
> #include <...> search starts here:
>  /usr/local/include
>  /Users/builder/llvm/llvm-rel-bin-install/bin/../lib/clang/3.1/include
>  /usr/include
>  /System/Library/Frameworks (framework directory)
>  /Library/Frameworks (framework directory)
> End of search list.
>  "/usr/llvm-gcc-4.2/libexec/gcc/i686-apple-darwin10/4.2.1/ld" -dynamic
> -arch x86_64 -macosx_version_min 10.6.0 -o a.out -lcrt1.10.6.o
> /var/folders/So/SoDaKVGNF1GdaUhl-VCLoE+++TI/-Tmp-/test-cnlcGw.o
> /usr/lib/libstdc++.6.dylib -framework CoreFoundation -lSystem
> Undefined symbols:
>  "___asan_report_load4", referenced from:
>       _main in test-cnlcGw.o
>  "___asan_init", referenced from:
>      _asan.module_ctor in test-cnlcGw.o
> ld: symbol(s) not found
> clang-3: error: linker command failed with exit code 1 (use -v to see
> invocation)
>
>
>
>
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