[PATCH gnupg] tests:gpgscm: Fix build error on AIX.

* tests/gpgscm/ffi.c (ffi_init): Undefine 'open' so it does not get
expanded to 'open64' in the ffi_define_function macro.

--
GnuPG-bug-id: 7632
Signed-off-by: Collin Funk <[email protected]>
---
 tests/gpgscm/ffi.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/gpgscm/ffi.c b/tests/gpgscm/ffi.c
index 21ec6a057..cdb794ad0 100644
--- a/tests/gpgscm/ffi.c
+++ b/tests/gpgscm/ffi.c
@@ -1667,6 +1667,11 @@ ffi_init (scheme *sc, const char *argv0, const char *scriptname,
   ffi_define_function (sc, getenv);
   ffi_define_function (sc, setenv);
   ffi_define_function_name (sc, "_exit", exit);
+  /* AIX defines open to open64 which breaks the macro expansion to
+     'do_open' if it is not undefined.  */
+#ifdef open
+# undef open
+#endif
   ffi_define_function (sc, open);
   ffi_define_function (sc, fdopen);
   ffi_define_function (sc, close);
-- 
2.49.0