Cross compiling fails: missing file

[Joseph Schuchart]

I am trying to cross compile on the XC40 (sandybridge frontend, haswell backend) so I am configuring the first stage as suggested in contrib/platforms/config.bg:

$ cmake ../ -DCOREBLAS_PKG_DIR=$HOME/opt-cray/plasma-2.8.0-intel/lib/pkgconfig/ -DBUILD_SHARED_LIBS=OFF -DHWLOC_LIBRARY=$HOME/opt-cray/hwloc-1.11.9/lib/libhwloc.a -DBUILD_TESTING=OFF -DBUILD_TOOLS=ON -DBUILD_PARSEC=ON -DBUILD_DPLASMA=OFF -DCMAKE_BUILD_TYPE=Release

Interestingly, BUILD_DPLASMA is flagged by CMake as unused.

More importantly, linking fails:

cd /zhome/academic/HLRS/hlrs/hpcjschu/src/parsec/icldistcomp-parsec-0fd3570cc0c8/build_cray_mpich_cross/parsec && /usr/bin/cmake -E cmake_link_script CMakeFiles/parsec-base.dir/link.txt --verbose=1
"" qc libparsec-base.a  CMakeFiles/parsec-base-obj.dir/class/parsec_dequeue.c.o CMakeFiles/parsec-base-obj.dir/class/parsec_fifo.c.o CMakeFiles/parsec-base-obj.dir/class/parsec_lifo.c.o CMakeFiles/parsec-base-obj.dir/class/parsec_list.c.o CMakeFiles/parsec-base-obj.dir/class/parsec_object.c.o CMakeFiles/parsec-base-obj.dir/class/parsec_value_array.c.o CMakeFiles/parsec-base-obj.dir/class/parsec_hash_table.c.o CMakeFiles/parsec-base-obj.dir/class/parsec_rwlock.c.o CMakeFiles/parsec-base-obj.dir/utils/argv.c.o CMakeFiles/parsec-base-obj.dir/utils/cmd_line.c.o CMakeFiles/parsec-base-obj.dir/utils/colors.c.o CMakeFiles/parsec-base-obj.dir/utils/parsec_environ.c.o CMakeFiles/parsec-base-obj.dir/utils/installdirs.c.o CMakeFiles/parsec-base-obj.dir/utils/keyval_parse.c.o CMakeFiles/parsec-base-obj.dir/utils/mca_param.c.o CMakeFiles/parsec-base-obj.dir/utils/mca_param_cmd_line.c.o CMakeFiles/parsec-base-obj.dir/utils/mca_parse_paramfile.c.o CMakeFiles/parsec-base-obj.dir/utils/os_path.c.o CMakeFiles/parsec-base-obj.dir/utils/output.c.o CMakeFiles/parsec-base-obj.dir/utils/show_help.c.o CMakeFiles/parsec-base-obj.dir/utils/zone_malloc.c.o CMakeFiles/parsec-base-obj.dir/utils/atomic_external.c.o CMakeFiles/parsec-base-obj.dir/utils/debug.c.o CMakeFiles/parsec-base-obj.dir/show_help_lex.l.c.o CMakeFiles/parsec-base-obj.dir/keyval_lex.l.c.o
Error running link command: No such file or directory

[George Bosilca]

DPLASMA should not be built on the first stage, we only need to build the internal libraries needed for the precompiler that will allow us to generate the code.

[Thomas Herault]

What CMake version are you using?

With cmake 3.12.1, I don't get the BUILD_DPLASMA warning

And more importantly, the linker is properly selected on my machine...

grep CMAKE_LINKER CMakeCache.txt returns what?

[Joseph Schuchart]

I'm using cmake version 3.5.2

$ grep CMAKE_LINKER CMakeCache.txt
CMAKE_LINKER:FILEPATH=
//ADVANCED property for variable: CMAKE_LINKER
CMAKE_LINKER-ADVANCED:INTERNAL=1

If building regularly (all for the frontend):

$ grep CMAKE_LINKER CMakeCache.txt
CMAKE_LINKER:FILEPATH=/usr/bin/ld
//ADVANCED property for variable: CMAKE_LINKER
CMAKE_LINKER-ADVANCED:INTERNAL=1

[George Bosilca]

Found it. If testing is disabled then DPLASMA is also disabled. I will fix.

[Joseph Schuchart]

The Cmake trace. Looks like the check for the CXX compiler resets the CMAKE_LINKER variable.

[George Bosilca]

I went as far as cmake 3.8 and everything works with the command provided here.

[Thomas Herault]

Joseph, did you find the reason why you don't get a linker? We could not reproduce...

[Joseph Schuchart]

I tried again with the latest snapshot and could not reproduce the linker error, not sure where it came from. Adapting the build script provided for BlueGene and convincing CMake that this is a cross-compilation build does the trick. Sorry for the noise.

[Joseph Schuchart]

Cannot reproduce with latest commit