[CMake] install name for fortran dylibs on mac

[clinton at elemtech.com]

I've attached a sample project which includes 2 external projects, where the executable links with the library from its build tree. 
After it is built, you can run it from the build tree ./app-prefix/src/app-build/app 

Clint 

----- Original Message -----

> When using @rpath, the proper way to the executable to find it at runtime is
> for the executable to have an rpath with a directory that contains the
> dylib.

> When compiling the executable, the linker flag "-rpath /path/to/dylib" should
> be given. This should be automatic with CMake when building the executable,
> and if it isn't doing that for you, please give us an example.
> To verify, the executable has the rpath, you can run "otool -l <executable> |
> grep LC_RPATH -A2"

> Clint

> ----- Original Message -----

> > So I noticed the CMAKE_MACOSX_RPATH variable, and tried setting it, which
> > does result in the install name of the dylib being set to
> > @rpath/dylibname.so BUT when I link it in an executable tool -L just shows
> > the dylib as @rpath/dylibname.so and the linker fails to find it at run
> > time. What is the proper way to get CMake to build the executable linking
> > against the dylib and be able to run it in the build tree and install tree?
> 

> > Izaak Beekman
> 
> > ===================================
> 
> > (301)244-9367
> 
> > UMD-CP Visiting Graduate Student
> 
> > Aerospace Engineering
> 
> > ibeekman at umiacs.umd.edu
> 
> > ibeekman at umd.edu
> 

> > On Sat, May 3, 2014 at 10:54 AM, Dan Kegel < dank at kegel.com > wrote:
> 

> > > On Sat, May 3, 2014 at 7:17 AM, < clinton at elemtech.com > wrote:
> > 
> 
> > > > Use at least CMake 2.8.12 and in your library project add this:
> > 
> 
> > > > set(CMAKE_MACOSX_RPATH 1)
> > 
> 
> > > > ...
> > 
> 
> > > > For more details:
> > 
> 
> > > > http://www.kitware.com/blog/home/post/510
> > 
> 

> > > What he said. See also past discussion at
> > 
> 
> > > http://web.archiveorange.com/archive/v/5y7PkspCBZwiWhvodZSP
> > 
> 
> > > I put together some tiny demos showing various ways to do it, with
> > 
> 
> > > walkthroughs, at
> > 
> 
> > > http://kegel.com/macosx/rpath/
> > 
> 

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