[llvm-commits] [PATCH] Fix $ORIGIN expansion for dynamically linked executables

[Dimitry Andric]

Hi,

I recently tried building llvm and clang trunk on FreeBSD with shared
libraries enabled.  Building went just fine, but during testing each
llvm executable complained it could not find libLLVM-3.1svn.so.

It turned out that they all use $ORIGIN in their RPATH section, to find
any libraries relative to their own installation path.

However, the necessary ORIGIN flag was not set in their FLAGS (or
FLAGS_1) section.  It seems you must pass "-z origin" to GNU ld to have
this flag set in the final executable.

It's probably that e.g. Linux simply ignores this flag, and always
expands $ORIGIN anyway, but this is not the case on FreeBSD, and
possibly on other operating systems too.

So I would like to propose the attached patch, which passes "-z origin"
to the linker, in addition to any -rpath option.
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