[eclipse-iceoryx#210] Initial cmake integration with example

CMakeLists.txt

@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 3.28)
+project(iceoryx2)
+
+#TODO build iceoryx2
+#TODO how to handle feature flags
+
+add_subdirectory(iceoryx2-lang)
+
+#TODO add flags
+# if(EXAMPLES)
+    add_subdirectory(examples/c)
+# endif()

examples/c/CMakeLists.txt

@@ -0,0 +1,4 @@
+cmake_minimum_required(VERSION 3.28)
+project(examples_c)
+
+add_subdirectory(discovery)

examples/c/discovery/CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.28)
+project(example_c_discovery)
+
+find_package(iceoryx2_lang_c REQUIRED)
+
+add_executable(example_c_discovery src/main.c)
+
+target_link_libraries(example_c_discovery iceoryx2_lang_c)

examples/c/discovery/src/main.c

@@ -0,0 +1,6 @@
+
+#include "iox2/iceoryx2.h"
+
+int main(void) {
+    zero_copy_service_list();
+}

iceoryx2-lang/CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.28)
+project(iceoryx2-lang)
+
+add_subdirectory(c)
+
+if(BUILD_TESTING)
+    add_subdirectory(tests/tbd)
+endif()

iceoryx2-lang/c/CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.28)
+project(iceoryx2_lang_c)
+
+# TODO remove once generation works as expected ... have a look at iceoryx-rs
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/iceoryx2.h"
+  "${CMAKE_BINARY_DIR}/generated/include/iox2/iceoryx2.h" @ONLY)
+
+set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
+list(APPEND CMAKE_FIND_LIBRARY_SUFFIXES ".so")
+list(APPEND CMAKE_FIND_LIBRARY_SUFFIXES ".dll")
+
+find_library(ICEORYX2_LANG_C_LIB ${PROJECT_NAME} HINTS ${iceoryx2_SOURCE_DIR}/target/release)
+
+add_library(${PROJECT_NAME} INTERFACE)
+
+target_include_directories(${PROJECT_NAME} INTERFACE ${CMAKE_BINARY_DIR}/generated/include)
+
+target_link_libraries(${PROJECT_NAME} INTERFACE ${ICEORYX2_LANG_C_LIB})
+
+########## find_package in source tree ##########
+set(${PROJECT_NAME}_DIR ${PROJECT_SOURCE_DIR}/cmake
+    CACHE FILEPATH
+    "${PROJECT_NAME}Config.cmake to make find_package(${PROJECT_NAME}) work in source tree!"
+    FORCE
+)

iceoryx2-lang/c/cmake/Config.cmake.in

@@ -0,0 +1,5 @@
+@PACKAGE_INIT@
+
+# TODO check if this is correct
+include("${CMAKE_CURRENT_LIST_DIR}/@[email protected]")
+check_required_components("@PROJECT_NAME@")

iceoryx2-lang/c/cmake/iceoryx2_lang_cConfig.cmake

@@ -0,0 +1,7 @@
+if(NOT ${CMAKE_FIND_PACKAGE_NAME}_FOUND_PRINTED)
+    message(STATUS "The package '${CMAKE_FIND_PACKAGE_NAME}' is used in source code version.")
+    set(${CMAKE_FIND_PACKAGE_NAME}_FOUND_PRINTED true CACHE INTERNAL "")
+endif()
+
+list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR})
+