error in destroot for clang-3.8 +universal

[Michael Dickens]

Can't search Trac so here it is; sorry about any duplication! I no
longer have the build log to see how this library was created in the
first place (e.g., with "-headerpad_max_install_names" or the like). -
MLD

{{{
:info:destroot llvm[2]: Installing compiler runtime library:
darwin/asan_osx_dynamic
:info:destroot /usr/bin/install -c -m 0644
/opt/local/var/macports/build/_opt_source_MacPorts_trunk_dports_lang_llvm-3.8/clang-3.8/work/build/Release+Debug+Asserts/lib/clang/3.8.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
/opt/local/var/macports/build/_opt_source_MacPorts_trunk_dports_lang_llvm-3.8/clang-3.8/work/destroot/opt/local/libexec/llvm-3.8/lib/clang/3.8/lib/darwin
:info:destroot install_name_tool
/opt/local/var/macports/build/_opt_source_MacPorts_trunk_dports_lang_llvm-3.8/clang-3.8/work/destroot/opt/local/libexec/llvm-3.8/lib/clang/3.8/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
-id
/opt/local/libexec/llvm-3.8/lib/clang/3.8/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
:info:destroot error: install_name_tool: changing install names or
rpaths can't be redone for:
/opt/local/var/macports/build/_opt_source_MacPorts_trunk_dports_lang_llvm-3.8/clang-3.8/work/destroot/opt/local/libexec/llvm-3.8/lib/clang/3.8/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
(for architecture i386) because larger updated load commands do not fit
(the program must be relinked, and you may need to use -headerpad or
-headerpad_max_install_names)
:info:destroot make[2]: ***
[/opt/local/var/macports/build/_opt_source_MacPorts_trunk_dports_lang_llvm-3.8/clang-3.8/work/destroot/opt/local/libexec/llvm-3.8/lib/clang/3.8/lib/darwin/libclang_rt.asan_osx_dynamic.dylib]
Error 1
}}}