Add liburing 2.2

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.3)
+cmake_minimum_required(VERSION 3.10)
 
 project(ione
         LANGUAGES CXX

src/CMakeLists.txt

@@ -21,15 +21,43 @@ configure_file(config.hpp.in ${IONE_BINARY_DIR}/include/ione/config.hpp)
 
 add_library(ione STATIC)
 
-include(FetchContent)
-FetchContent_Declare(yaclib
-        GIT_REPOSITORY https://github.com/YACLib/YACLib.git
-        GIT_TAG main
+# yaclib
+if (NOT TARGET yaclib)
+        include(FetchContent)
+        FetchContent_Declare(yaclib
+                GIT_REPOSITORY https://github.com/YACLib/YACLib.git
+                GIT_TAG main
         )
-set(YACLIB_FLAGS "CORO")
-FetchContent_MakeAvailable(yaclib)
+        set(YACLIB_FLAGS "CORO")
+        FetchContent_MakeAvailable(yaclib)
+endif()
 target_link_libraries(ione PUBLIC yaclib)
 
+
+# liburing based on this
+# https://github.com/questdb/questdb/blob/master/core/CMakeLists.txt#L186
+if (UNIX AND NOT APPLE AND CMAKE_SYSTEM_NAME MATCHES "Linux")
+    include(ExternalProject)
+    ExternalProject_Add(
+            liburing_git
+            GIT_REPOSITORY http://github.com/axboe/liburing.git
+            GIT_TAG liburing-2.2
+            BUILD_IN_SOURCE 1
+            BUILD_BYPRODUCTS "<SOURCE_DIR>/src/liburing.a"
+            BUILD_COMMAND make "CC=${CMAKE_C_COMPILER}" "CXX=${CMAKE_CXX_COMPILER}" "AR=${CMAKE_AR}" "RANLIB=${CMAKE_RANLIB}"
+            CONFIGURE_COMMAND ""
+            INSTALL_COMMAND ""
+            TEST_COMMAND ""
+            LOG_BUILD ON
+    )
+    ExternalProject_Get_Property(liburing_git SOURCE_DIR)
+    add_library(liburing INTERFACE)
+    add_dependencies(liburing liburing_git)
+    target_include_directories(liburing INTERFACE ${SOURCE_DIR}/src/include)
+    target_link_libraries(liburing INTERFACE ${SOURCE_DIR}/src/liburing.a)
+    target_link_libraries(ione PUBLIC liburing)
+endif ()
+
 target_sources(ione
         PUBLIC ${IONE_INCLUDES}
         PRIVATE ${IONE_HEADERS}

test/CMakeLists.txt

@@ -74,3 +74,6 @@ else ()
 endif ()
 
 unset(IONE_TEST_SOURCES)
+
+add_executable(cat_example cat_example.cpp)
+target_link_libraries(cat_example PRIVATE ione)