Fail-safe for not available routines.

Signed-off-by: MtoLStoN <70513124+MtoLStoN@users.noreply.github.com>

CMakeLists.txt

@@ -111,7 +111,7 @@ target_link_libraries(
   "$<$<BOOL:${WITH_OpenMP}>:OpenMP::OpenMP_Fortran>"
   "mctc-lib::mctc-lib"
   "$<$<BOOL:${WITH_CPCMX}>:cpcmx::cpcmx>"
-  "tblite::tblite"
+  "$<$<BOOL:${WITH_TBLITE}>:tblite::tblite>"
 )
 set_target_properties(
   "lib-${PROJECT_NAME}-static"
@@ -143,7 +143,7 @@ target_link_libraries(
   "$<$<BOOL:${WITH_OpenMP}>:OpenMP::OpenMP_Fortran>"
   "mctc-lib::mctc-lib"
   "$<$<BOOL:${WITH_CPCMX}>:cpcmx::cpcmx>"
-  "tblite::tblite"
+  "$<$<BOOL:${WITH_TBLITE}>:tblite::tblite>"
 )
 set_target_properties(
   "lib-${PROJECT_NAME}-shared"

src/solv/cpx.F90

@@ -68,6 +68,8 @@ subroutine setup_cpcmx(self, env, solvent)
         !> TODO: SETUP solute directly from TCosmo instead of reading COSMO file
         Call read_cosmo('xtb.cosmo',self%solute,'NONE',error)
         if (allocated(error)) Call env%error(error%message, source)
+#else
+        Call no_cpcmx_here(env)
 #endif
     end subroutine setup_cpcmx
 
@@ -103,6 +105,8 @@ subroutine calculate_cpcmx(self,env,solvent,energy_gas,probe,T,max_cycle,conv_cr
         call self%state_correction(density(solvent),atomicmass(self%solvent%element),T)
         call self%cds(probe,solvent)
         total_energy= self%dG()+energy_gas
+#else
+        Call no_cpcmx_here(env)
 #endif
     end subroutine calculate_cpcmx
 
@@ -147,4 +151,13 @@ subroutine print_cpcmx(self,verbose)
 #endif
     end subroutine print_cpcmx
 
+
+#if ! WITH_CPCMX
+    subroutine no_cpcmx_here(env)
+        type(TEnvironment), intent(inout) :: env
+
+        call env%error('CPCM-X is not available in this version of xtb.', source)
+    end subroutine no_cpcmx_here
+#endif
+
 end module xtb_solv_cpx