fix cmake error (part)

IronPad/CMakeLists.txt

@@ -0,0 +1,26 @@
+cmake_minimum_required(VERSION 3.12)
+project(IronPad LANGUAGES CXX)
+
+# set standard
+set(CMAKE_CXX_STANDARD 20)
+
+# add libcmo
+add_subdirectory("../LibCmo" "LibCmo.out")
+
+# setup sources
+set(ironpad_headers ".")
+set(ironpad_src IronPad.cpp)
+
+# create static library
+add_library(IronPad
+STATIC
+	${ironpad_src}
+)
+target_link_libraries(IronPad
+PRIVATE
+	LibCmo
+)
+target_include_directories(IronPad
+PUBLIC
+	${ironpad_headers}
+)