[firedrake] New Firedrake dependency - libspatialindex

[Lawrence Mitchell]

Hi Justin,

> On 13 Nov 2015, at 06:18, Justin Chang <jychang48 at gmail.com> wrote:
> 
> Hello again,
> 
> I am having issues with spatialindex on my RHEL HPC machine
> (-no_package_manager). I installed spatialindex 1.8.5 from source (w/
> prefix=$HOME/.local) and added $HOME/.local/include and $HOME/.local/lib to
> $CPATH and $LD_LIBRARY_PATH respectively. But I am getting this error:
> 
> g++ -pthread -shared build/temp.linux-x86_64-2.7/firedrake/spatialindex.o
> -lspatialindex -o
> /turquoise/users/jychang48/firedrake-deps/firedrake/src/firedrake/firedrake/spatialindex.so
>    /usr/bin/ld: cannot find -lspatialindex
>    collect2: error: ld returned 1 exit status
>    error: command 'g++' failed with exit status 1
> 
> I did"mpicc -x c -v -E /dev/null" and saw that
> /users/jychang48/.local/include is there, but when I look at LIBRARY_PATH,
> /users/jychang48/.local/lib is not there.
> 
> How can I fix this?

LD_LIBRARY_PATH only tells the dynamic loader where to look for libraries.  Not the linker.  I think in your case you should try running with the LDFLAGS environment variable set to:

LDFLAGS="-L/users/jychang48/.local/lib -Wl,-rpath,/users/jychang48/.local/lib"

That should result in no need for LD_LIBRARY_PATH.  The former bit sets the search path for the linker.  The latter tells the linker to bake that search path into the executable.

Cheers,

Lawrence
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