caf invokes compiler specified by OC-build-time FC (#197)

Author: Damian Rouson

src/extensions/caf-foot

@@ -60,10 +60,8 @@ if [ $# == 0 ]; then
   exit 1
 fi
 
-# Default to "mpif90" Fortran compiler if environment variable CAFC has zero length:
-if [ -z "$CAFC" ]; then
-   CAFC=mpif90
-fi
+# Default to "mpif90" Fortran compiler if environment variable CAFC is empty or unset:
+CAFC=${CAFC:-mpif90}
 
 # TODO -- improve the syntax of the "set" command below to accepted an unlimited number of arguments
 max_arguments=100

src/mpi/CMakeLists.txt

@@ -53,6 +53,11 @@ if(opencoarrays_aware_compiler)
 else()
   file(APPEND "${compiler_wrapper}"  "caf_compiler=false\n")
 endif()
+
+if ( DEFINED ENV{FC} )
+  file(APPEND "${compiler_wrapper}"  "CAFC=$ENV{FC}\n")
+endif ()
+
 if ("${CMAKE_SYSTEM_NAME}" MATCHES "Linux")
   file(APPEND "${compiler_wrapper}"  "linux=true\n")
 endif()