WIP: Fixes needed for flang

CHANGELOG.md

@@ -50,6 +50,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Fixed issue of some Baselibs builds appearing to support zstandard. This is not possible due to Baselibs building HDF5 and netCDF as static libraries
+- Updates to support llvm-flang
 - Trajectory sampler: fix a bug when group_name does not exist in netCDF file and a bug that omitted the first time point
 - Fixed a bug where the periodicity around the earth of the lat-lon grid was not being set properly when grid did not span from pole to pole
 

generic/AbstractComponent.F90

@@ -1,4 +1,5 @@
 module mapl_AbstractComponent
+   use pFlogger, only: t_Logger => Logger
    implicit none
    private
 
@@ -96,7 +97,7 @@ subroutine i_RunChild(this, name, clock, phase, unusable, rc)
       end subroutine i_RunChild
 
       subroutine i_SetLogger(this, logger)
-         use pfl_logger, only: t_Logger => Logger
+         import t_Logger
          import AbstractComponent
          implicit none
          class(AbstractComponent), intent(inout) :: this
@@ -105,13 +106,13 @@ subroutine i_SetLogger(this, logger)
       end subroutine i_SetLogger
 
       function i_GetLogger(this) result(logger)
-         use pfl_logger, only: t_Logger => Logger
+         import t_Logger
          import AbstractComponent
          implicit none
          class(t_Logger), pointer :: logger
          class(AbstractComponent), intent(in) :: this
       end function i_GetLogger
 
    end interface
-      
+
 end module mapl_AbstractComponent

generic/MAPL_Generic.F90

@@ -9805,8 +9805,10 @@ subroutine READIT(WHICH)
                if (io_rank == 0) then
                   print *,'Using parallel IO for reading file: ',trim(DATAFILE)
 
-#ifdef __NAG_COMPILER_RELEASE
+#if defined( __NAG_COMPILER_RELEASE)
                   _FAIL('NAG does not provide ftell. Convert to stream I/O')
+#elif defined(__flang__)
+                  _FAIL('flang does not provide ftell. Convert to stream I/O')
 #else
                   offset = _FTELL(UNIT)+4
 #endif

gridcomps/History/Sampler/MAPL_EpochSwathMod.F90

@@ -15,7 +15,6 @@ module MAPL_EpochSwathMod
   use MAPL_TimeDataMod
   use MAPL_VerticalDataMod
   use MAPL_Constants
-  use pFIO
   use MAPL_GriddedIOItemVectorMod
   use MAPL_GriddedIOItemMod
   use MAPL_ExceptionHandling

include/unused_dummy.H

@@ -10,4 +10,8 @@
 #ifdef _UNUSED_DUMMY
 #  undef _UNUSED_DUMMY
 #endif
-#define _UNUSED_DUMMY(x) if (.false.) then; associate (q____ => x); end associate; endif
+#if defined(__flang__)
+#  define _UNUSED_DUMMY(x) if (.false.) then; print*, shape(x); endif
+#else
+#  define _UNUSED_DUMMY(x) if (.false.) then; associate (q____ => x); end associate; endif
+#endif

pfio/AbstractServer.F90

@@ -205,7 +205,10 @@ subroutine set_status(this,status)
 
       !$omp critical (counter_status)
       this%status = status
+      ! llvm-flang has an issue with omp flush of complex data structures
+#if !defined(__flang__)
       !$omp flush (this)
+#endif
       !$omp end critical (counter_status)
    end subroutine  set_status
 
@@ -217,7 +220,10 @@ subroutine update_status(this, rc)
       !$omp critical (counter_status)
       this%status = this%status -1
       status = this%status
+      ! llvm-flang has an issue with omp flush of complex data structures
+#if !defined(__flang__)
       !$omp flush (this)
+#endif
       !$omp end critical (counter_status)
       if (status /= 0) then
         _RETURN(_SUCCESS)
@@ -290,7 +296,10 @@ subroutine set_AllBacklogIsEmpty(this,status)
 
       !$omp critical (backlog_status)
       this%all_backlog_is_empty = status
+      ! llvm-flang has an issue with omp flush of complex data structures
+#if !defined(__flang__)
       !$omp flush (this)
+#endif
       !$omp end critical (backlog_status)
    end subroutine set_AllBacklogIsEmpty