build: support enabled options when building seastar-module

before this change, when building seastar-module, we don't check for
the enabled features. so, for instance io uring backend is not enabled
even `Seastar_IO_URING` is set.

in this change we

* check for the enabled options,
* link against the related libraries, and
* add the required macro definitions

this should enable seastar-module to build with, for instance, io_uring
backend enabled. as `SEASTAR_HAVE_URING` enables this backend when
building `src/core/reactor_backend.cc`.

Fixes #2249
Signed-off-by: Kefu Chai <[email protected]>

src/CMakeLists.txt

@@ -96,7 +96,8 @@ target_compile_definitions (seastar-module
     SEASTAR_SCHEDULING_GROUPS_COUNT=${Seastar_SCHEDULING_GROUPS_COUNT}
     SEASTAR_COROUTINES_ENABLED
   PRIVATE
-    SEASTAR_MODULE)
+    SEASTAR_MODULE
+    ${Seastar_PRIVATE_COMPILE_DEFINITIONS})
 target_compile_options (seastar-module
   PUBLIC
     -U_FORTIFY_SOURCE)
@@ -126,6 +127,18 @@ target_link_libraries (seastar-module
     yaml-cpp::yaml-cpp
     "$<BUILD_INTERFACE:Valgrind::valgrind>"
     Threads::Threads)
+if (Seastar_NUMA)
+  target_link_libraries (seastar-module
+    PRIVATE numactl::numactl)
+endif ()
+if (Seastar_HWLOC)
+  target_link_libraries (seastar-module
+    PRIVATE hwloc::hwloc)
+endif ()
+if (Seastar_IO_URING)
+  target_link_libraries (seastar-module
+    PRIVATE URING::uring)
+endif ()
 
 install (
   TARGETS seastar-module