[llvm] r201921 - Use relative rpath so that the installation and build dirs are relocatable.

[Rafael Espíndola]

On 25 February 2014 20:35, David Fang <fang at csl.cornell.edu> wrote:
> Hi,
>         This patch is giving me runtime dyld errors on darwin8 (cmake+shared
> build):
>
> [  6%] Building Intrinsics.gen...
> dyld: Library not loaded: @rpath/libLLVMSupport.dylib
>   Referenced from:
> /Volumes/Isolde/builds/LLVM/gcc40-cmake-build/include/llvm/IR/../../../bin/llvm-tblgen
>   Reason: image not found
> make[2]: *** [include/llvm/IR/Intrinsics.gen.tmp] Error 133
> make[1]: *** [include/llvm/IR/CMakeFiles/intrinsics_gen.dir/all] Error 2
> make: *** [all] Error 2
>
> because:
>
> % otool -L bin/llvm-tblgen
> bin/llvm-tblgen:
>         @rpath/libLLVMSupport.dylib (compatibility version 0.0.0, current
> version 0.0.0)

that looks correct. What is the rpath in llvm-tablgen? I get:

$ otool -L ./bin/llvm-tblgen
./bin/llvm-tblgen:
@rpath/libLLVMSupport.dylib (compatibility version 0.0.0, current version 0.0.0)

$ otool -l ./bin/llvm-tblgen
Load command 18
          cmd LC_RPATH
      cmdsize 40
         path @executable_path/../lib (offset 12)

$ otool  -l lib/libLLVMSupport.dylib
Load command 3
          cmd LC_ID_DYLIB
      cmdsize 56
         name @rpath/libLLVMSupport.dylib (offset 24)

>
> The old 'set( CMAKE_INSTALL_RPATH "\$ORIGIN/../lib")' used to work fine.

Old OS X used $ORIGIN? That is the ELF path.

> I suppose I could attempt to conditionally use the old behavior depending on
> host OS X version?  Or can I also use @executable_path/../lib as
> CMAKE_INSTALL_NAME_DIR?

What do you get with the configure build if you do a shared build?

Cheers,
Rafael