define ULLONG_MAX if not already defined

diff --git a/lib/dns/gen.c b/lib/dns/gen.c
index bc419575be2c27f797cfd37e636e3534ae4b698a..8fd3058e1cae8a7d1a675c7a86e09c32dfb702f1 100644 (file)
--- a/lib/dns/gen.c
+++ b/lib/dns/gen.c
@@ -43,6 +43,10 @@
 #include "gen-unix.h"
 #endif
 
+#ifndef ULLONG_MAX
+#define ULLONG_MAX (~0ULL)
+#endif
+
 #define INSIST(cond) \
        if (!(cond)) { \
                fprintf(stderr, "%s:%d: INSIST(%s)\n", \