[PATCH 09/18] testsuite, fortran: add required external keyword

[Nils-Christian Kempke via Gdb-patches <gdb-patches@sourceware.org>]

Currenlty, ifx/ifort cannot compile the given executable as it is not
valid Fortran.  It is missing the external keyword on the
no_arg_subroutine.  Gfortran compiles the example but this is actually
a bug and there is an open gcc ticket for this here:

   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50377

Adding the keyword does not change the gfortran compiling of the example.
It will, however, prevent a future fail once 50377 has been addressed.
---
 gdb/testsuite/gdb.fortran/function-calls.f90 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gdb/testsuite/gdb.fortran/function-calls.f90 b/gdb/testsuite/gdb.fortran/function-calls.f90
index b56c5c97f7..e9c8c44afd 100644
--- a/gdb/testsuite/gdb.fortran/function-calls.f90
+++ b/gdb/testsuite/gdb.fortran/function-calls.f90
@@ -198,6 +198,7 @@ program function_calls
     type(cart_nd) :: c_nd
     type(nested_cart_3d) :: nested_c
     character(40) :: returned_string, returned_string_debugger
+    external no_arg_subroutine
     real8 = 3.00
     real4 = 9.3
     integer_array = 17
-- 
2.25.1

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