build with intel fails

[jcwright77]

lib/gltf.hpp(109): error: the generated default constructor for "glTF_Builder::struct_pbrMetallicRoughness" cannot be used in an initializer for its own data member { false, "pbrMetallicRoughness", {} }; ^ detected during implicit generation of "glTF_Builder::struct_texture_info::struct_texture_info()" at line 10222

[tzanio]

Hi @jcwright77,

What was the platform and the version of icc?

Tzanio

[jcwright77]

2020 . The constructor args seem right, so not sure why it is choking platform is centos7, and release 4.2 in a tar.gz file

[jcwright77]

Bump, any ideas on this? We could use the new glvis soon.

[tzanio]

Hi @jcwright77,

This error looks strange, and I can't reproduce it.

I just build the following with ICC 2021.6.0 20220226 without any issues:

• mfem:master (with make CXX=icc-2022.2 config)
• glew and SDL2 following the instruction here, with an additional CC=icc-2022.2 flag
• glvis:master (with just make)

All of these worked fine for me.

Any chance you can use a newer icc and/or rebuild all of the above from scratch?

[v-dobrev]

In @tzanio's instructions above there is an incorrect make flag: the MFEM GNU make build system does not use CC (which is typically the C compiler) but CXX which is typically the C++ compiler. Second, the Intel C++ compiler is icpc, whereas the C compiler is icc. The new OneAPI Intel compilers use icx and icpx for the C and the C++ compilers, respectively.

Thus, the compiler line for MFEM should be:

make serial CXX=icpc -j 16

The GLVis GNU make build system uses by default the compiler used for building MFEM, so there is no need to explicitly set that, unless one wants to use a different compiler.

That said, I tried building MFEM+GLVis with Intel 19.0.4.227 and 2021.2.0 (on Livermore machines I do not see 2020 version of the Intel compiler for some reason) and both versions worked fine.

For a parallel build, the MFEM GNU make build system expects one to set the MPI compiler wrapper through the variable MPICXX (default value is mpicxx), e.g.

make parallel MPICXX=mpic++ -j 16

With a parallel MFEM build, the GLVis build system will also pickup and use the MPI compiler used by MFEM, so again one does not need to specify a compiler explicitly.

[jcwright77]

I will try building again. I cannot really update to the latest intel very quickly. I will try the parallel build of mfem with the parallel flag in the glvis make. I will use mpiicpc .

[v-dobrev]

By the way, if the problem is in building GLVis with Intel then you can probably just use g++ to build a serial MFEM version just for use with GLVis that is also built with g++. Such a build of GLVis should still work fine with apps build with parallel MFEM builds with Intel compiler. The only requirement is that if you enable MFEM_USE_GNUTLS=YES in the parallel build, you should also enable it in the serial build.

[jcwright77]

Thanks I may try that. Most of our software stack is built with intel so if any of that is used the final link has to be with intel.

[tzanio]

Sorry, copy+paste error -- it is indeed CXX for mfem (and CC for glew/SDL2).

[jcwright77]

I might try that. Of course glvis now has a few dependencies as well.

-john

On Sep 9, 2022, at 9:43 PM, Veselin Dobrev @.***> wrote:

 By the way, if the problem is in building GLVis with Intel then you can probably just use g++ to build a serial MFEM version just for use with GLVis that is also built with g++. Such a build of GLVis should still work fine with apps build with parallel MFEM builds with Intel compiler. The only requirement is that if you enable MFEM_USE_GNUTLS=YES in the parallel build, you should also enable it in the serial build.

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[tzanio]

@jcwright77, were you able to resolve this?

[jcwright77]

Trying to get back to it. With each build taking to so it’s taking a while.

-john

On Sep 18, 2022, at 11:24 AM, Tzanio Kolev @.***> wrote:

 @jcwright77, were you able to resolve this?

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[jcwright77]

building plain serial mfem with g++ and glvis on top of that worked. May be a compiler bug in intel 2020.

[jcwright77]

when I have time I'll try a few build with inte 2021