[Mochi-devel] running mochi examples

[Latham, Robert J.]

On Mon, 2019-11-04 at 19:00 -0500, Abid Malik via mochi-devel wrote:
> 
> Thanks.
> 
> I am getting the following linking error:
> 
> 
> Linking C executable 01_margo_hello_server
> /usr/bin/ld: CMakeFiles/01_margo_hello_server.dir/hello_server.c.o:
> undefined reference to symbol 'ABT_thread_create'
> /gpfs/alpine/csc299/world-shared/amalik/mochi/spack/opt/spack/linux-
> rhel7-power9le/gcc-6.4.0/argobots-develop-
> uwvdjjdzrkn475ax7bw4w7hztawzidg3/lib/libabt.so.0: error adding
> symbols: DSO missing from command line
> /usr/bin/sha1sum: 01_margo_hello_server: No such file or directory
> collect2: error: ld returned 1 exit status
> make[2]: *** [01_margo_hello_server] Error 1
> make[1]: *** [CMakeFiles/01_margo_hello_server.dir/all] Error 2
> make: *** [all] Error 2
> 
> currently, I have the following:
> 
> Currently Loaded Modules:
>   1) xl/16.1.1-3                      6) darshan-runtime/3.1.7      
>         11) boost-1.70.0-gcc-6.4.0-dw376xg
>   2) spectrum-mpi/10.3.0.1-20190611   7) DefApps                    
>         12) libfabric-1.8.1-gcc-6.4.0-d4kxa4p
>   3) hsi/5.0.2.p5                     8) argobots-develop-gcc-6.4.0-
> uwvdjjd  13) mercury-master-gcc-6.4.0-nbp34rm
>   4) xalt/1.1.4                       9) bzip2-1.0.8-gcc-6.4.0-
> mdsmice       14) margo-0.5.2-gcc-6.4.0-gniufvt
>   5) lsf-tools/2.0                   10) zlib-1.2.11-gcc-6.4.0-
> nbedgs2       15) cmake/3.15.2
> 
> Argobot is there. Am I missing something?


You're right that on most platforms 'modules' takes care of setting
whatever flags are needed for the compiler and linker to find the
library.  I don't know why the toolchain on summit does not use CPATH
and such.

I had to compile with the help of pkg-config like so:

 gcc margo-example-client.c my-rpc.c $(pkg-config --libs margo)

We're pretty good about providing pkg-config files for the mochi
suite.  I hope you never have to do things manually, but if you come
across a spack package, however, that does not have pkg-config support,
you might have to.  You can get the paths (for CFLAGS and LDFLAGS) by
hand with "spack find --paths":

% spack find --paths margo
==> 1 installed package
-- linux-rhel7-power9le / gcc at 9.1.0 -----------------------------
margo at 0.5.2  /autofs/nccs-svm1_home1/robl/src/spack/opt/spack/linux-
rhel7-power9le/gcc-9.1.0/margo-0.5.2-bwzjgx7k3ocghtxh4ihcj3uxpchqv7zq

Again, if you ever have to do that for a Mochi package, that's a bug
and you should tell us.

==rob