Do not check the FortranCInterface if LAPACKE is not built.

Author: friedc

LAPACKE/CMakeLists.txt

@@ -1,3 +1,8 @@
+if(NOT LAPACKE)
+    return()
+endif()
+
+
 # Create a header file lapacke_mangling.h for the routines called in my C programs
 include(FortranCInterface)
 ## Ensure that the fortran compiler and c compiler specified are compatible
@@ -14,11 +19,6 @@ endif()
 add_subdirectory(include)
 
 
-if(NOT LAPACKE)
-    return()
-endif()
-
-
 message(STATUS "LAPACKE enabled")
 enable_language(C)