Compiling on OpenBSD/no OpenMP environment

[jg1uaa]

I am trying jtdx on OpenBSD. This envoronment does not support OpenMP.

Simply configure with cmake .. -DCMAKE_Fortran_COMPILER=egfortran -DQt5_DIR=/usr/local/lib/qt5/cmake/Qt5 and make, OpenMP related error occurs.

ld: error: undefined symbol: omp_get_num_procs_
>>> referenced by decoder.f90
>>>               decoder.f90.o:(multimode_decoder_) in archive libwsjt_fort.a

ld: error: undefined symbol: omp_set_dynamic_
>>> referenced by decoder.f90
>>>               decoder.f90.o:(multimode_decoder_) in archive libwsjt_fort.a
>>> referenced by decoder.f90
>>>               decoder.f90.o:(multimode_decoder_) in archive libwsjt_fort.a

ld: error: undefined symbol: omp_set_nested_
>>> referenced by decoder.f90
>>>               decoder.f90.o:(multimode_decoder_) in archive libwsjt_fort.a
c++: error: linker command failed with exit code 1 (use -v to see invocation)

To suppress this error, add conditional compile to decoder.f90 like this (but I am not clear with FORTRAN, please fix if this diff is not correct.):

diff --git a/lib/decoder.f90 b/lib/decoder.f90
index 09ed9c83..fae212f5 100644
--- a/lib/decoder.f90
+++ b/lib/decoder.f90
@@ -148,7 +148,8 @@ subroutine multimode_decoder(params)
        call tone8myc(); mycall12_00=mycall
      endif
      ndecodes=0; allmessages=""; allsnrs=0; allfreq=0. !init arrays for multithreading decoding
-     numcores=omp_get_num_procs()
+     numcores=1
+     !$ numcores=omp_get_num_procs()
      nuserthr=params%nmt

      numthreads=1 ! fallback
@@ -167,8 +168,8 @@ subroutine multimode_decoder(params)
      endif

 !print *,nuserthr,numcores,numthreads
-     call omp_set_dynamic(.false.)
-     call omp_set_nested(.true.)
+     !$ call omp_set_dynamic(.false.)
+     !$ call omp_set_nested(.true.)

      nfa=params%nfa; nfb=params%nfb; nfqso=params%nfqso; nfawide=params%nfa; nfbwide=params%nfb
      if(params%nfilter) then  ! 160Hz Filter bandwidth, 580Hz Filter bandwidth in Hound mode
@@ -2371,7 +2372,7 @@ endif
      go to 800
   endif

-  call omp_set_dynamic(.true.)
+  !$ call omp_set_dynamic(.true.)
 !!!  !$omp parallel sections num_threads(2) copyin(/timer_private/) shared(ndecoded) if(.true.) !iif() needed on Mac
   !$omp parallel sections num_threads(2) shared(ndecoded) if(.true.) !iif() needed on Mac
   !$omp section

But this causes linker error at last.

ld: error: unable to find library -lwsjt_fort_omp
c++: error: linker command failed with exit code 1 (use -v to see invocation)
gmake[2]: *** [CMakeFiles/jtdx.dir/build.make:800: jtdx] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:296: CMakeFiles/jtdx.dir/all] Error 2
gmake: *** [Makefile:156: all] Error 2

I think CMakeList.txt also needs to be fixed, but I have no idea.
Can you tell me where I should modify in that file?