[lwip-devel] [bug #49895] Incorrect configuration detection in lwip/dns.h

[Thomas Mueller]

URL:
  <http://savannah.nongnu.org/bugs/?49895>

                 Summary: Incorrect configuration detection in lwip/dns.h
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: tmu
            Submitted on: Tue 20 Dec 2016 11:47:10 AM GMT
                Category: DNS
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: 2.0.0

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Details:

src/include/lwip/dns.h uses "#if defined" to test for LWIP_IPV4 
configuration instead of "#if".


diff --git a/src/include/lwip/dns.h b/src/include/lwip/dns.h
index 3753a53a..2d147afa 100644
--- a/src/include/lwip/dns.h
+++ b/src/include/lwip/dns.h
@@ -61,7 +61,7 @@ extern "C" {
 #ifndef LWIP_DNS_ADDRTYPE_DEFAULT
 #define LWIP_DNS_ADDRTYPE_DEFAULT   LWIP_DNS_ADDRTYPE_IPV4_IPV6
 #endif
-#elif defined(LWIP_IPV4)
+#elif LWIP_IPV4
 #define LWIP_DNS_ADDRTYPE_DEFAULT   LWIP_DNS_ADDRTYPE_IPV4
 #else
 #define LWIP_DNS_ADDRTYPE_DEFAULT   LWIP_DNS_ADDRTYPE_IPV6





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