lttng-ust: new package

This is the user space library for LTTng. It is needed to do user space
tracing, as opposed to kernel space tracing.

pkgs/development/tools/misc/lttng-ust/default.nix

@@ -0,0 +1,32 @@
+{ stdenv, fetchurl, liburcu }:
+
+# NOTE:
+#   ./configure ...
+#   [...]
+#   LTTng-UST will be built with the following options:
+#   
+#   Java support (JNI): Disabled
+#   sdt.h integration:  Disabled
+#   [...]
+#
+# Debian builds with std.h (systemtap).
+
+stdenv.mkDerivation rec {
+  name = "lttng-ust-2.2.1";
+
+  src = fetchurl {
+    url = "https://lttng.org/files/lttng-ust/${name}.tar.bz2";
+    sha256 = "0881ri3v96fjii24qnwgsypk4crri4qp6mc4zp7kwghz8gys9rla";
+  };
+
+  buildInputs = [ liburcu ];
+
+  meta = with stdenv.lib; {
+    description = "LTTng Userspace Tracer libraries";
+    homepage = http://lttng.org/;
+    license = licenses.lgpl21Plus;
+    platforms = platforms.linux;
+    maintainers = [ maintainers.bjornfor ];
+  };
+
+}

pkgs/top-level/all-packages.nix

@@ -3542,6 +3542,8 @@ let
 
   ltrace = callPackage ../development/tools/misc/ltrace { };
 
+  lttngUst = callPackage ../development/tools/misc/lttng-ust { };
+
   mk = callPackage ../development/tools/build-managers/mk { };
 
   neoload = callPackage ../development/tools/neoload {