how to check which version of OpenACC API is being used by the PGI compiler

Accelerated Computing HPC Compilers Legacy PGI Compilers
1

Hello,

It seems that array reduction starts to be supported in OpenACC API 2.7 (What's new in OpenACC 2.7! | OpenACC), but I cannot find information/confirmation on whether API 2.7 has been fully adopted by the PGI compiler 19.4. I tried the PGI compiler release notes (PGI Release Notes Version 19.9 for x86 and NVIDIA Processors) and the API 2.7documentation (https://www.openacc.org/sites/default/files/inline-files/OpenACC.2.7.pdf).

As a general question, how can I check which version of OpenACC API is being used by the PGI compiler I am currently using?

Thanks,
Shine

2

Hi Shine,

We’re still in the process of adding the new OpenACC 2.7 features with PGI 19.10 currently support up to the 2.6 standard.

The “_OPENACC” macro is defined to the standard’s release date. With 2.6 being “201711” and 2.7 using “201811”.

For example:

% cat test.F90
program foo
  use openacc
  print *, _OPENACC
end program foo
% pgfortran -acc test.F90
% a.out
       201711

Hope this helps,
Mat

3

Thanks, Mat, for your helpful information. Yes, with your code, I can tell that my PGI 19.4 is using the OpenACC API 2.6.

Thanks,
Shine

4

Hi Mat:

I was looking at this post and tried the following:

program foo
  use openacc
  print *, _OPENACC
end program foo

Then I compile with

C:\brandnewR>pgfortran -acc test.f90
./test.exf: warning: unknown section "_RDATA" found, executable not
  stripped.  Use the linker's /merge option to merge this section
  with another.  Example: "/merge:_RDATA=.data"

C:\brandnewR>test.exe
    0.000000

I’m using Windows with Community edition. What am I doing wrong, please?
Thanks,
Erin

5

Hi again!

I used the -cpp option during compilation and it worked fine.

Thanks though!

Sincerely,
Erin

6

Hi Erin,

FYI, “.F90” suffix will have the compiler implicitly preprocess the source file. However “.f90” are not preprocessed by default. For these files, you’ll need to add “-Mpreprocess” or, as you note, “-cpp”.

-Mat

7

Great!

Thanks