Attempt to fix a pernicious issue where some systems complain about n…

…o implicit type. See #427 for more information.

fortran/module_netcdf_nc_data.F90

@@ -314,6 +314,7 @@ Module netcdf_nc_data
  Integer(C_INT), Parameter :: NC_FATAL   = 1
  Integer(C_INT), Parameter :: NC_VERBOSE = 2
 
+#define USE_NETCDF4
 #ifdef USE_NETCDF4
 
 !                          NETCDF4 data

fortran/module_typesizes.F90

@@ -0,0 +1,65 @@
+! Description:
+!   Provide named kind parameters for use in declarations of real and integer 
+!    variables with specific byte sizes (i.e. one, two, four, and eight byte
+!    integers; four and eight byte reals). The parameters can then be used
+!    in (KIND = XX) modifiers in declarations.
+!   A single function (byteSizesOK()) is provided to ensure that the selected 
+!    kind parameters are correct.
+!  
+! Input Parameters:
+!   None.
+!
+! Output Parameters:
+!   Public parameters, fixed at compile time:
+!     OneByteInt, TwoByteInt, FourByteInt, EightByteInt
+!                                     FourByteReal, EightByteRadl
+!
+! References and Credits:
+!   Written by
+!    Robert Pincus
+!    Cooperative Institue for Meteorological Satellite Studies
+!    University of Wisconsin - Madison
+!    1225 W. Dayton St. 
+!    Madison, Wisconsin 53706
+!    Robert.Pincus@ssec.wisc.edu
+!
+! Design Notes:
+!   Fortran 90 doesn't allow one to check the number of bytes in a real variable;
+!     we check only that four byte and eight byte reals have different kind parameters. 
+!
+module typesizes
+  implicit none
+  public
+  integer, parameter ::   OneByteInt = selected_int_kind(2), &
+                          TwoByteInt = selected_int_kind(4), &
+                         FourByteInt = selected_int_kind(9), &
+                        EightByteInt = selected_int_kind(18)
+
+  integer, parameter ::                                          &
+                        FourByteReal = selected_real_kind(P =  6, R =  37), &
+                       EightByteReal = selected_real_kind(P = 13, R = 307)
+contains
+  logical function byteSizesOK()
+  ! Users may call this function once to ensure that the kind parameters 
+  !   the module defines are available with the current compiler. 
+  ! We can't ensure that the two REAL kinds are actually four and 
+  !   eight bytes long, but we can ensure that they are distinct. 
+  ! Early Fortran 90 compilers would sometimes report incorrect results for 
+  !   the bit_size intrinsic, but I haven't seen this in a long time. 
+
+    ! Local variables
+    integer (kind =  OneByteInt)  :: One
+    integer (kind =  TwoByteInt)  :: Two
+    integer (kind = FourByteInt)  :: Four
+    integer (kind = EightByteInt) :: Eight
+
+    if (bit_size( One) == 8  .and. bit_size( Two)   == 16 .and.  &
+        bit_size(Four) == 32 .and. bit_size( Eight) == 64 .and.  &
+        FourByteReal > 0 .and. EightByteReal > 0 .and. &
+        FourByteReal /= EightByteReal) then
+      byteSizesOK = .true.
+    else
+      byteSizesOK = .false.
+    end if
+  end function byteSizesOK
+end module typeSizes

fortran/netcdf.F90

@@ -43,18 +43,18 @@ module netcdf
   !
   ! Update the dependencies in the Makefile.am when modifying the list of
   !     included files.
-#include "netcdf_constants.f90"
-#include "netcdf_externals.f90"
-#include "netcdf_overloads.f90"
-#include "netcdf_visibility.f90"
+#include "netcdf_constants.F90"
+#include "netcdf_externals.F90"
+#include "netcdf_overloads.F90"
+#include "netcdf_visibility.F90"
 contains
-#include "netcdf_file.f90"
-#include "netcdf3_file.f90"
-#include "netcdf_dims.f90"
-#include "netcdf_attributes.f90"
-#include "netcdf_variables.f90"
-#include "netcdf_text_variables.f90"
-#include "netcdf_expanded_subset.f90"
-#include "netcdf_get_nd_expanded.f90"
-#include "netcdf_eightbyte_subset.f90"
+#include "netcdf_file.F90"
+#include "netcdf3_file.F90"
+#include "netcdf_dims.F90"
+#include "netcdf_attributes.F90"
+#include "netcdf_variables.F90"
+#include "netcdf_text_variables.F90"
+#include "netcdf_expanded_subset.F90"
+#include "netcdf_get_nd_expanded.F90"
+#include "netcdf_eightbyte_subset.F90"
 end module netcdf