#serial 2dnl From Bruno Haible.AC_DEFUN(jm_LANGINFO_CODESET,[  AC_CHECK_HEADERS(langinfo.h)  AC_CHECK_FUNCS(nl_langinfo)  AC_CACHE_CHECK([for nl_langinfo and CODESET], jm_cv_langinfo_codeset,    [AC_TRY_LINK([#include <langinfo.h>],      [char* cs = nl_langinfo(CODESET);],      jm_cv_langinfo_codeset=yes,      jm_cv_langinfo_codeset=no)    ])  if test $jm_cv_langinfo_codeset = yes; then    AC_DEFINE(HAVE_LANGINFO_CODESET, 1,      [Define if you have <langinfo.h> and nl_langinfo(CODESET).])  fi])