Add CMakeLists.txt and README.md

cmake/CMakeLists.txt

@@ -0,0 +1,35 @@
+project(capnproto-java)
+
+cmake_minimum_required(VERSION 3.9)
+
+find_package(PkgConfig REQUIRED)
+
+set(CMAKE_CXX_STANDARD 11)
+set(CAPNPC_JAVA_SOURCES ../compiler/src/main/cpp/capnpc-java.c++)
+
+if(CAPNP_PKG_PATH)
+  set(ENV{PKG_CONFIG_PATH} "$ENV{PKG_CONFIG_PATH}:${CAPNP_PKG_PATH}")
+else()
+  find_path(CAPNP_PKG_PATH_VAR "capnp/lib/pkgconfig" HINTS ${CAPNP_PKG_PATH})
+  set(ENV{PKG_CONFIG_PATH} "$ENV{PKG_CONFIG_PATH}:${CAPNP_PKG_PATH_VAR}")
+endif()
+
+pkg_search_module(PKG_CAPNP REQUIRED capnp)
+
+if(PKG_CAPNP_FOUND)
+  message(STATUS "Capnp found!")
+  add_executable(capnpc-java
+    ${CAPNPC_JAVA_SOURCES}
+  )
+
+  target_include_directories(capnpc-java
+    PRIVATE
+      ${PKG_CAPNP_INCLUDE_DIRS}
+  )
+
+  target_link_libraries(capnpc-java
+    ${PKG_CAPNP_LDFLAGS}
+  )
+else()
+  message(FATAL_ERROR "Capnp not found!")
+endif()

cmake/README.md

@@ -0,0 +1,16 @@
+# capnproto-java cmake build
+
+Of course, capnproto needs to be pre-installed somewhere.
+
+## Using cmake
+
+mkdir build
+cd build
+cmake -DCAPNP_PKG_PATH=[path of Capnproto pkgconfig directory (with capnp.pc)] [path of CMakeLists.txt]
+
+## Using ccmake gui
+
+mkdir build
+cd build
+ccmake [path of CMakeLists.txt]
+.. set pkgconfig path manually