Multiple e-mail threads on the same issue (: As suggested in my earlier thread - add -mp=gpu to both CPPFLAGS and CFLAGS [or LDFLAGS]
Satish ------- Executing: cc -o /tmp/petsc-Vvs8_T/config.setCompilers/conftest -g -DLANDAU_DIM=2 -DLANDAU_MAX_SPECIES=10 -DLANDAU_MAX_Q=4 /tmp/petsc-Vvs8_T/config.setCompilers/conftest.o Possible ERROR while running linker: stderr: nvc-Warning-The -gpu option has no effect unless a language-specific option to enable GPU code generation is used (e.g.: -acc, -mp=gpu, -stdpar, -cuda) On Thu, 4 Nov 2021, Mark Adams wrote: > It is CPPFLAGS. I seem to get the same behavior. > > FWIW, I did get this response from NERSc but I don't know how to interpret > it. > > He seems to be saying that I don't need -mp=gpu for the device compiler > (nvcc). He seems to think that I am adding -gpu. > > nvcc -- The device compiler does not need any of those flags because it > already knows that it's being fed cuda code. The warning you're seeing is > coming from nvc (which is the host / CPU side compiler) if you're in the > PrgEnv-nvidia environment. You should not need to add -mp=gpu and -cuda, > please just add the -cuda flag (to your host code) not to the device code. > > I will try to talk with this guy again. > > Thanks, > > > On Thu, Nov 4, 2021 at 4:11 PM Barry Smith <bsm...@petsc.dev> wrote: > > > > > Yes, you need to use the CPPFLAGS which maybe called CPPCFLAGS I am not > > sure > > > > > > On Nov 4, 2021, at 3:23 PM, Mark Adams <mfad...@lbl.gov> wrote: > > > > Ah, CCFLAGS does not seem to work. > > > > On Thu, Nov 4, 2021 at 3:07 PM Barry Smith <bsm...@petsc.dev> wrote: > > > >> > >> You have to pass in the flag to turn off the bitching about -gpu to the > >> C preprocessor, not the C compiler. > >> > >> > >> stderr: > >> nvc-Warning-The -gpu option has no effect unless a language-specific > >> option to enable GPU code generation is used (e.g.: -acc, -mp=gpu, -stdpar, > >> -cuda) > >> Source: > >> #include "confdefs.h" > >> #include "conffix.h" > >> #include <stdlib.h> > >> > >> > >> > >> > On Nov 4, 2021, at 2:49 PM, Mark Adams <mfad...@lbl.gov> wrote: > >> > > >> > on Perlmutter with nvhpc: > >> > > >> > Defined make macro "CPP" to "cc --use cpp32" > >> > Preprocessing source: > >> > #include "confdefs.h" > >> > #include "conffix.h" > >> > #include <stdlib.h> > >> > > >> > Executing: cc --use cpp32 -I/tmp/petsc-jV9U1b/config.setCompilers > >> /tmp/petsc-jV9U1b/config.setCompilers/conftest.c > >> > Possible ERROR while running preprocessor: exit code 1 > >> > stderr: > >> > nvc-Error-Unknown switch: --use > >> > Source: > >> > <configure.log> > >> > >> <configure.log> > > > > > > >