error: ‘_Generic’ selector of type ‘struct GB_SelectOp_opaque **’ is not compatible with any association

[mfaysal101]

Hi,

I am trying to run some benchmarking tests on LAGraph. I followed the compilation instructions (side-by-side) here with GraphBLAS https://lagraph.readthedocs.io/en/latest/installation.html. The GraphBLAS compilation/build runs fine, however, when I am trying to compile the LAGraph, it gives me the error as shown in the title. I am using GCC 11.2.0

Following is the specifics of the error I am getting

In file included from /home/mfaysal/timdavis/LAGraph/include/LAGraph.h:49, from /home/mfaysal/timdavis/LAGraph/src/utility/LG_internal.h:30, from /home/mfaysal/timdavis/LAGraph/experimental/algorithm/LAGraph_msf.c:44: /home/mfaysal/timdavis/LAGraph/experimental/algorithm/LAGraph_msf.c: In function ‘LAGraph_msf’: /home/mfaysal/timdavis/GraphBLAS/Include/GraphBLAS.h:4559:9: error: ‘_Generic’ selector of type ‘struct GB_SelectOp_opaque **’ is not compatible with any association 4559 | (object), \ | ^ /home/mfaysal/timdavis/LAGraph/experimental/algorithm/LAGraph_msf.c:40:5: note: in expansion of macro ‘GrB_free’ 40 | GrB_free (&s1); \ | ^~~~ /home/mfaysal/timdavis/LAGraph/src/utility/LG_internal.h:127:5: note: in expansion of macro ‘LG_FREE_ALL’ 127 | LG_FREE_ALL ; \ | ^~~ /home/mfaysal/timdavis/LAGraph/include/LAGraph.h:366:9: note: in expansion of macro ‘GRB_CATCH’ 366 | GRB_CATCH (LG_GrB_Info) ; \

[DrTimothyAldenDavis]

That would happen if you're using the stable LAGraph release with GraphBLAS 8.x. You need to stick with GraphBLAS 7.4.4.

[DrTimothyAldenDavis]

If you want to use SuiteSparse:GraphBLAS 8.x, try the dev branch of LAGraph instead of the stable branch.

[mfaysal101]

Thanks so much @DrTimothyAldenDavis, we could not find GraphBLAS 7.4.4., so we used the GraphBLAS 7.4.3 branch and now LAGraph is building.

[mfaysal101]

Please let me know if you want me to close the issue.

[DrTimothyAldenDavis]

GraphBLAS 7.4.4 is here: https://github.com/DrTimothyAldenDavis/GraphBLAS/releases/tag/v7.4.4 but v7.4.3 will work fine on x86. It can fail on the Arm processor where there's an OpenMP atomic bug.

You can also use the dev branch of LAGraph, which works with GraphBLAS v8.x.

[DrTimothyAldenDavis]

v8.x of graphBLAS adds the JIT feature, which can greatly speed up user-defined types and operators. LAGraph only uses a few of those, however, so v7.4.x should be fine.

There are some improvements to the performance of the cdlp and lcc algorithms in the dev branch that don't appear in the stable branch. The latter were used for the LDBC '23 benchmarks (see this tag: https://github.com/GraphBLAS/LAGraph/releases/tag/LDBC_2023 which if I recall used GraphBLAS 8.0.2. Or maybe 8.0.1.

[DrTimothyAldenDavis]

So it depends on what you want to benchmark in LAGraph.

[mfaysal101]

Thanks, initially we aim to run the GAP benchmark.

[DrTimothyAldenDavis]

I have a draft v1.0.2 of LAGraph that works with v8.x of SuiteSparse GraphBLAS. It's not yet posted as a stable release but it's on the v1.0.2 branch of LAGraph.