#serial 4 dnl From Paul Eggert AC_DEFUN([jm_FUNC_MBRTOWC], [ AC_CACHE_CHECK([whether mbrtowc and mbstate_t are properly declared], jm_cv_func_mbrtowc, [AC_TRY_LINK( [#include ], [mbstate_t state; return ! (sizeof state && mbrtowc);], jm_cv_func_mbrtowc=yes, jm_cv_func_mbrtowc=no)]) if test $jm_cv_func_mbrtowc = yes; then AC_DEFINE(HAVE_MBRTOWC, 1, [Define to 1 if mbrtowc and mbstate_t are properly declared.]) fi ])