[MacPorts] #38527: clang-3.3 @3.3-r173279 AddressSanitizer binaries don't work without explicitly setting DYLD_LIBRARY_PATH

[MacPorts]

#38527: clang-3.3 @3.3-r173279 AddressSanitizer binaries don't work without
explicitly setting DYLD_LIBRARY_PATH
-------------------------------+--------------------------------
 Reporter:  andrew.c.morrow@…  |      Owner:  macports-tickets@…
     Type:  defect             |     Status:  new
 Priority:  Normal             |  Milestone:
Component:  ports              |    Version:  2.1.3
 Keywords:                     |       Port:  clang-3.3
-------------------------------+--------------------------------
 I'm using clang-3.3 @3.3-r173279:

 {{{
 > /opt/local/bin/clang-mp-3.3 --version
 clang version 3.3 (trunk 173279)
 Target: x86_64-apple-darwin12.3.0
 Thread model: posix
 }}}

 Given a simple hello world C++ program compiled with -fsanitize=address,
 the resulting binary cannot execute.
 {{{
 >  cat ./hello_world.cpp
 #include <cstdlib>
 #include <iostream>

 int main(int argc, char* argv[]) {
   std::cout << "Hello, World!\n";
   return EXIT_SUCCESS;
 }
 >  /opt/local/bin/clang-mp-3.3 ./hello_world.cpp -fsanitize=address -o
 ./hello_world
 >  ./hello_world
 dyld: Library not loaded:
 /opt/local/var/macports/build/_opt_mports_dports_lang_llvm-3.3/clang-3.3/work/trunk/Release+Debug+Asserts/lib/clang/3.3/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
   Referenced from: hello_world/./hello_world
   Reason: image not found
 [1]    62828 trace trap  ./hello_world
 }}}

 It looks as if it is looking for the asan support library in the original
 build path, not the install path. But we do find that library in the
 install for the port:

 {{{
 >  mdfind -name libclang_rt.asan_osx_dynamic.dylib
 /opt/local/libexec/llvm-3.3/lib/clang/3.3/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
 }}}

 Adding the containing directory to the DYLD_LIBRARY_PATH fixes things: the
 binary now runs:

 {{{
 >  DYLD_LIBRARY_PATH=/opt/local/libexec/llvm-3.3/lib/clang/3.3/lib/darwin
 ./hello_world
 Hello, World!
 }}}

 AddressSanitizer is super useful, it would be great if it worked out of
 the box for macports clang.

-- 
Ticket URL: <https://trac.macports.org/ticket/38527>
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