gtp: use OSMO_ASSERT() in gtp_new()
When using built-in static_assert() [1], gcc v12.2.1 fails:
In file included from gsn.c:27:
gsn.c: In function 'gtp_new':
gsn.c:444:54: error: expression in static assertion is not constant
444 | osmo_static_assert(gtp_T_defs[0].default_val != 0, first_default_val_not_zero);
| ^
The reason is likely that gtp_T_defs[] is not const, so it cannot
be assert()ed statically. With the current osmo_static_assert()
implementation, this assert does nothing. One can change the
gtp_T_defs[0].default_val to 0 and the code will still compile.
Change-Id: Ia8af1736b63d501661046fe70befe5bbabc1045a
Related: [1] libosmocore.git I5ca34bc14c05e8c38c721d7df33feb1c6c41c76e
diff --git a/gtp/gsn.c b/gtp/gsn.c
index 9776b28..8b3ea3a 100644
--- a/gtp/gsn.c
+++ b/gtp/gsn.c
@@ -441,7 +441,7 @@
/* Initialize timers: */
(*gsn)->tdef = gtp_T_defs;
/* Small hack to properly reset tdef for old clients not using the tdef_group: */
- osmo_static_assert(gtp_T_defs[0].default_val != 0, first_default_val_not_zero);
+ OSMO_ASSERT(gtp_T_defs[0].default_val != 0);
if (gtp_T_defs[0].val == 0)
osmo_tdefs_reset((*gsn)->tdef);