fixes #143 Protocols and transports should be "configurable"

This makes all the protocols and transports optional.  All
of them except ZeroTier are enabled by default, but you can
now disable them (remove from the build) with cmake options.

The test suite is modified so that tests still run as much
as they can, but skip over things caused by missing functionality
from the library (due to configuration).

Further, the constant definitions and prototypes for functions
that are specific to transports or protocols are moved into
appropriate headers, which should be included directly by
applications wishing to use these.

We have also added and improved documentation -- all of the
transports are documented, and several more man pages for
protocols have been added.  (Req/Rep and Surveyor are still
missing.)

1 files changed, 18 insertions, 0 deletions

diff --git a/perf/perf.c b/perf/perf.c
index 9333d4f5..1d89fc61 100644
--- a/perf/perf.c
+++ b/perf/perf.c
@@ -22,6 +22,24 @@
 // change without notice, and not part of the stable API or ABI.
 #include "core/nng_impl.h"
 
+#if defined(NNG_ENABLE_PAIR1)
+#include "protocol/pair1/pair.h"
+
+#elif defined(NNG_ENABLE_PAIR0)
+#include "protocol/pair0/pair.h"
+
+#else
+
+static void die(const char *, ...);
+
+static int
+nng_pair_open(nng_socket *rv)
+{
+	die("No pair protocol enabled in this build!");
+	return (NNG_ENOTSUP);
+}
+#endif // NNG_ENABLE_PAIR
+
 static void latency_client(const char *, int, int);
 static void latency_server(const char *, int, int);
 static void throughput_client(const char *, int, int);