lwip: Fix compatibility issues with later versions

The name of the header guard in lwIP's <lwip/opt.h> has changed from
'__LWIP_OPT_H__' to 'LWIP_HDR_OPT_H' (bug #35874 in May 2015).

Other fixes:

- In curl_setup.h, the problem with an old PSDK doesn't apply if lwIP is
used.

- In memdebug.h, the 'socket' should be undefined first due to lwIP's
lwip_socket() macro.

- In curl_addrinfo.c lwIP's getaddrinfo() + freeaddrinfo() macros need
special handling because they were undef'ed in memdebug.h.

- In select.c we can't use preprocessor conditionals inside select if
MSVC and select is a macro, as it is with lwIP.

http://curl.haxx.se/mail/lib-2015-12/0023.html
http://curl.haxx.se/mail/lib-2015-12/0024.html

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/curl_addrinfo.c b/lib/curl_addrinfo.c
index 6627a6b96..17ee95858 100644
--- a/lib/curl_addrinfo.c
+++ b/lib/curl_addrinfo.c
@@ -521,7 +521,11 @@ void
 curl_dofreeaddrinfo(struct addrinfo *freethis,
                     int line, const char *source)
 {
+#ifdef USE_LWIPSOCK
+  lwip_freeaddrinfo(freethis);
+#else
   (freeaddrinfo)(freethis);
+#endif
   curl_memlog("ADDR %s:%d freeaddrinfo(%p)\n",
               source, line, (void *)freethis);
 }
@@ -544,7 +548,11 @@ curl_dogetaddrinfo(const char *hostname,
                    struct addrinfo **result,
                    int line, const char *source)
 {
+#ifdef USE_LWIPSOCK
+  int res=lwip_getaddrinfo(hostname, service, hints, result);
+#else
   int res=(getaddrinfo)(hostname, service, hints, result);
+#endif
   if(0 == res)
     /* success */
     curl_memlog("ADDR %s:%d getaddrinfo() = %p\n",