Allow to build vs nacl instead of libsodium

By default libsodium is used. Only if --enable-nacl is specified, then
nacl will be used instead of libsodium.

Pass locations of nacl headers and libraries by using the following
options:

--with-nacl-headers=/home/me/somewhere/nacl-20110221/build/469/include/amd64/
--with-nacl-libs=/home/me/somewhere/nacl-20110221/build/469/lib/amd64/

1 files changed, 4 insertions, 0 deletions

diff --git a/toxcore/friend_requests.c b/toxcore/friend_requests.c
index 6e98f18b..b01015c4 100644
--- a/toxcore/friend_requests.c
+++ b/toxcore/friend_requests.c
@@ -21,6 +21,10 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include "friend_requests.h"
 
 /* Try to send a friend request to peer with public_key.