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