#if USE_GETTEXT
#include <libintl.h>
#else
+ // In certain environments, some standard headers like <iomanip>
+ // and <locale> include libintl.h. If libintl.h is included after
+ // we define our gettext macro below, this causes a syntax error
+ // at the declaration of the gettext function in libintl.h.
+ // Fix this by including such a header before defining the macro.
+ // See issue #4446.
+ // Note that we can't include libintl.h directly since we're in
+ // the USE_GETTEXT=0 case and can't assume that gettext is installed.
+ #include <locale>
+
#define gettext(String) String
#endif