fix linking non-embedded libuv test case.

Makefile

@@ -189,5 +189,5 @@ test-py27-cffi: $(PY27)
 test-py27-noembed: $(PY27)
 	cd deps/libev && ./configure --disable-dependency-tracking && make
 	cd deps/c-ares && ./configure --disable-dependency-tracking && make
-	cd deps/libuv && ./autogen.sh && ./configure && make
+	cd deps/libuv && ./autogen.sh && ./configure --disable-static && make
 	CPPFLAGS="-Ideps/libev -Ideps/c-ares -Ideps/libuv/include" LDFLAGS="-Ldeps/libev/.libs -Ldeps/c-ares/.libs -Ldeps/libuv/.libs" LD_LIBRARY_PATH="$(PWD)/deps/libev/.libs:$(PWD)/deps/c-ares/.libs:$(PWD)/deps/libuv/.libs" EMBED=0 GEVENT_CORE_CEXT_ONLY=1 PYTHON=python2.7 PATH=$(BUILD_RUNTIMES)/versions/python2.7/bin:$(PATH) make develop toxtest

src/gevent/libuv/_corecffi_build.py

@@ -69,16 +69,22 @@ library_dirs = [
     os.path.join(libuv_dir, '.libs')
 ]
 
+# XXX: This is all duplicated from _setuplibuv.py
 if sys.platform.startswith('win'):
     libuv_lib = os.path.join(libuv_dir, 'Release', 'lib', 'libuv.lib')
     extra_link_args = ['/NODEFAULTLIB:libcmt', '/LTCG']
-    extra_objects = [libuv_lib]
 else:
     libuv_lib = os.path.join(libuv_dir, '.libs', 'libuv.a')
-    extra_objects = [libuv_lib]
     extra_link_args = []
 
 LIBUV_LIBRARIES = []
+if os.path.exists(libuv_lib):
+    extra_objects = [libuv_lib]
+else:
+    # Must be non-embedded
+    extra_objects = []
+    LIBUV_LIBRARIES = ['uv']
+
 if sys.platform.startswith('linux'):
     LIBUV_LIBRARIES.append('rt')
 elif sys.platform.startswith("win"):