build(ibm): add XL Fortran branch in compiler_test

Author: rouson

src/smart_pointer/sp_smart_pointer_s.f90 renamed to src/smart_pointer/sp_smart_pointer_s.F90

@@ -1,4 +1,7 @@
 submodule(sp_smart_pointer_m) sp_smart_pointer_s
+#ifdef XLF
+  use sp_reference_counter_m, only : sp_reference_counter_t 
+#endif
   implicit none
 
 contains

test/compiler_test_m.f90

@@ -232,7 +232,9 @@ function fpm_compiler_arguments() result(args)
         else if (scan(compiler_identity, "NAG")==1) then
           args = "--compiler nagfor --flag -fpp"
         else if (scan(compiler_identity, "Intel")==1) then
-          args = "--compiler ifort --flag -coarray=shared"
+          args = "--compiler ifort --flag"
+        else if (scan(compiler_identity, "IBM")==1) then
+          args = "--compiler xlf2003_r --flag -DXLF"
         else
           error stop "----> Unrecognized compiler_version() in function fpm_compiler_arguments. <----"
         end if