Occa: Compilation fails with PGI compiler

[awehrfritz]

The compilation fails when using the PGI Community Edition Version 19.10.

The error seems to be due to an incorrect include path. However, explicitly specifying it (make OCCA_INCLUDE_PATH=/opt/pgi/linux86-64-llvm/19.10/include) does not resolve the issue.

The actual error message is:

/opt/pgi/linux86-64-llvm/19.10/bin/pgc++  -O3 -fast -Mipa=fast,inline -Msmartalloc -std=c++11 -fPIC -o /path/to/occa/obj/modes.o  -mp -c -I/path/to/occa/include -I/opt/pgi/linux86-64-llvm/19.10/include -I/usr/include -I/path/to/occa/src /path/to/occa/src/modes.cpp
pgc++-Warning--Mipa is not supported for this target

"/usr/include/c++/9/cstdlib", line 75: catastrophic error: cannot open source
          file "stdlib.h"
  #include_next <stdlib.h>
                          ^

1 catastrophic error detected in the compilation of "/path/to/occa/src/modes.cpp".
Compilation terminated.
make: *** [Makefile:132: /path/to/occa/obj/modes.o] Error 2

This is on a Fedora 31 Linux system which comes with gcc 9.3.1.

[SFrijters]

I cannot reproduce this with my PGI 20.1 compiler
Are you using the CMake build or the make build?

[awehrfritz]

Just the normal Makefiles, I haven't even tried cmake for occa.

Which PGI edition and platform is this on? Are you using cmake or Makefiles?

[SFrijters]

I'm using CMake exclusively. Using PGI 20.1 (I think it's this Professional Edition) on CentOS 7.7, but the software stack consists of EasyBuild modules, so most of the includes/libraries that are relevant are not system includes/libraries.

[awehrfritz]

Well, can you test it with classic make then? I don't have access to PGI 20.1.

[SFrijters]

Can try that next week (no longer at work), and I would ask you to try the CMake variant as well to make our testing symmetric.

[SFrijters]

I tried with a clean occa repository and make -j4 and I got no errors.

pgc++ -O3 -fast -Mipa=fast,inline -Msmartalloc -std=c++11 -fPIC -o /path/to/occa/obj/modes.o -mp -c -I/path/to/occa/include -I/path/to/occa/include -I/path/to/occa/src /path/to/occa/src/modes.cpp

$ pgc++ --version

pgc++ 20.1-0 LLVM 64-bit target on x86-64 Linux -tp haswell 
PGI Compilers and Tools
Copyright (c) 2020, NVIDIA CORPORATION.  All rights reserved.

[dmed256]

Closing since we can't reproduce