+ dnl Persuade Solaris <arpa/inet.h> to declare inet_ntop.
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+ dnl Most platforms that provide inet_ntop define it in libc.
+ dnl Solaris 8..10 provide inet_ntop in libnsl instead.
+ HAVE_INET_NTOP=1
+ gl_save_LIBS=$LIBS
+ AC_SEARCH_LIBS([inet_ntop], [nsl], [],
+ [AC_CHECK_FUNCS([inet_ntop])
+ if test $ac_cv_func_inet_ntop = no; then
+ HAVE_INET_NTOP=0
+ fi
+ ])
+ LIBS=$gl_save_LIBS
+
+ INET_NTOP_LIB=
+ if test "$ac_cv_search_inet_ntop" != "no" &&
+ test "$ac_cv_search_inet_ntop" != "none required"; then
+ INET_NTOP_LIB="$ac_cv_search_inet_ntop"
+ fi
+ AC_SUBST([INET_NTOP_LIB])
+
+ AC_CHECK_HEADERS_ONCE([netdb.h])
+ AC_CHECK_DECLS([inet_ntop],,,
+ [#include <arpa/inet.h>
+ #if HAVE_NETDB_H
+ # include <netdb.h>
+ #endif
+ ])
+ if test $ac_cv_have_decl_inet_ntop = no; then
+ HAVE_DECL_INET_NTOP=0
+ AC_REQUIRE([AC_C_RESTRICT])
+ fi