cmake fortran using env

CMakeLists.txt

@@ -19,22 +19,22 @@ MESSAGE (STATUS "MPI_C_COMPILER ${MPI_C_COMPILER}")
 MESSAGE (STATUS "MPI_Fortran_COMPILER ${MPI_Fortran_COMPILER}")
 
 if ("${MPI_C_COMPILER}" STREQUAL "MPI_C_COMPILER-NOTFOUND")
-    MESSAGE (STATUS "NO COMPILE WITH ${SPACK_CC}")
+    MESSAGE (STATUS "NO COMPILE WITH $ENV{SPACK_CC}")
     set(CMAKE_C_COMPILER "${SPACK_CC}")
 else()
-    MESSAGE (STATUS "YES COMPILE WITH ${SPACK_CC}")
+    MESSAGE (STATUS "YES COMPILE WITH $ENV{MPI_C_COMPILER}")
     set(CMAKE_C_COMPILER "${MPI_C_COMPILER}")
 endif()
 
 MESSAGE (STATUS "COMPILE WITH CMAKE_C_COMPILER ${CMAKE_C_COMPILER}")
 
 if ("${MPI_CXX_COMPILER}" STREQUAL "MPI_CXX_COMPILER-NOTFOUND")
-    set(CMAKE_C_COMPILER "${SPACK_CXX}")
+    set(CMAKE_C_COMPILER "$ENV{SPACK_CXX}")
 else()
     set(CMAKE_CXX_COMPILER "${MPI_CXX_COMPILER}")
 endif()
 if ("${MPI_Fortran_COMPILER}" STREQUAL "MPI_Fortran_COMPILER-NOTFOUND")
-    set(CMAKE_Fortran_COMPILER "${SPACK_FC}")
+    set(CMAKE_Fortran_COMPILER "$ENV{SPACK_FC}")
 else()
     set(CMAKE_Fortran_COMPILER "${MPI_Fortran_COMPILER}")
 endif()