Remove redundant checks for OCA compilers

 - Fixes #58 The checks performed in the top level CMakeLists.txt are
   inherited whenever other CMake files are `include`d or
   `add_subdirectory`-d
 - `${opencoarrays_aware_compiler}` set in top level and inherited
   everywhere else

Author: zbeekman

src/mpi/CMakeLists.txt

@@ -10,22 +10,6 @@ elseif("${CMAKE_Fortran_COMPILER_ID}" STREQUAL "PGI")
   set(portland_group_compiler true)
 endif()
 
-if (NOT CMAKE_VERSION VERSION_LESS 3.3.1)
-  # Detect Fortran compiler version directly
-  if(gfortran_compiler AND (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 5))
-    set(opencoarrays_aware_compiler true)
-  else()
-    set(opencoarrays_aware_compiler false)
-  endif()
-else()
-  # Use the C compiler version as a proxy for the Fortran compiler version (won't work with NAG)
-  if(gfortran_compiler AND (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5))
-    set(opencoarrays_aware_compiler true)
-  else()
-    set(opencoarrays_aware_compiler false)
-  endif()
-endif()
-
 if(gfortran_compiler AND (NOT opencoarrays_aware_compiler))
   # This applied to gfortran 4.9 and some earlier versions (FIX ME: find out which)
   add_definitions(-DCOMPILER_SUPPORTS_CAF_INTRINSICS)

src/tests/unit/extensions/CMakeLists.txt

@@ -2,22 +2,6 @@ if("${CMAKE_Fortran_COMPILER_ID}" STREQUAL "GNU")
   set(gfortran_compiler true)
 endif()
 
-if (NOT CMAKE_VERSION VERSION_LESS 3.3.1)
-  # Detect Fortran compiler version directly
-  if(gfortran_compiler AND (NOT CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 5.1))
-    set(opencoarrays_aware_compiler true)
-  else()
-    set(opencoarrays_aware_compiler false)
-  endif()
-else()
-  # Use the C compiler version as a proxy for the Fortran compiler version (won't work with NAG)
-  if(gfortran_compiler AND (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.1))
-    set(opencoarrays_aware_compiler true)
-  else()
-    set(opencoarrays_aware_compiler false)
-  endif()
-endif()
-
 if("${gfortran_compiler}" AND (NOT "${opencoarrays_aware_compiler}"))
   # This applied to gfortran 4.9 and some earlier versions (TODO: find out which)
   add_definitions(-DCOMPILER_SUPPORTS_CAF_INTRINSICS)