Move declaration of ecpg_gettext() to a saner place.

Declaring this in the client-visible header ecpglib.h was a pretty
poor decision.  It's not meant to be application-callable (and if
it was, putting it outside the extern "C" { ... } wrapper means
that C++ clients would fail to call it).  And the declaration would
not even compile for a client, anyway, since it would not have the
macro pg_attribute_format_arg().  Fortunately, it seems that no
clients have tried to include this header with ENABLE_NLS defined,
or we'd have gotten complaints about that.  But we have no business
putting such a restriction on client code.

Move the declaration to ecpglib_extern.h, since in fact nothing
outside src/interfaces/ecpg/ecpglib/ needs to call it.

The practical effect of this is just that clients can now safely
#include ecpglib.h while having ENABLE_NLS defined, but that seems
like enough of a reason to back-patch it.

Discussion: https://postgr.es/m/20590.1573069709@sss.pgh.pa.us

1 files changed, 6 insertions, 0 deletions

diff --git a/src/interfaces/ecpg/ecpglib/extern.h b/src/interfaces/ecpg/ecpglib/extern.h
index b55229943a8..04c81116091 100644
--- a/src/interfaces/ecpg/ecpglib/extern.h
+++ b/src/interfaces/ecpg/ecpglib/extern.h
@@ -206,6 +206,12 @@ void		ecpg_set_compat_sqlda(int, struct sqlda_compat **, const PGresult *, int,
 struct sqlda_struct *ecpg_build_native_sqlda(int, PGresult *, int, enum COMPAT_MODE);
 void		ecpg_set_native_sqlda(int, struct sqlda_struct **, const PGresult *, int, enum COMPAT_MODE);
 
+#ifdef ENABLE_NLS
+extern char *ecpg_gettext(const char *msgid) pg_attribute_format_arg(1);
+#else
+#define ecpg_gettext(x) (x)
+#endif
+
 /* SQLSTATE values generated or processed by ecpglib (intentionally
  * not exported -- users should refer to the codes directly) */