Fix compilation error in <libintl.h> on Cygwin.

Reported by Michael Haubenwallner at https://savannah.gnu.org/bugs/?50595 .

* gettext-runtime/intl/libgnuintl.in.h (newlocale): Hide declaration if
  locale_t type is not visible on Cygwin.

diff --git a/gettext-runtime/intl/libgnuintl.in.h b/gettext-runtime/intl/libgnuintl.in.h
index dc1947f8f2bba1a8186f904acfb00df93b35ceb1..95dcc16cacc98ecbe8bb7e062b290e7e5e39df75 100644 (file)
--- a/gettext-runtime/intl/libgnuintl.in.h
+++ b/gettext-runtime/intl/libgnuintl.in.h
@@ -439,7 +439,10 @@ extern char *setlocale (int, const char *);
 
 #undef newlocale
 #define newlocale libintl_newlocale
+/* Declare newlocale() only if the system headers define the 'locale_t' type. */
+#if !(defined __CYGWIN__ && !defined LC_ALL_MASK)
 extern locale_t newlocale (int, const char *, locale_t);
+#endif
 
 #endif