Cmake refresh

Use target objects everywhere, and simplify handling of system vs
local dependencies.

CMakeModules/AddSimGearTest.cmake

@@ -0,0 +1,30 @@
+
+function(add_simgear_test _name _sources)
+    add_executable(${_name} ${_sources})
+    target_link_libraries(${_name} SimGearCore)
+
+    # for simgear_config.h
+    target_include_directories(${_name} PRIVATE ${PROJECT_BINARY_DIR}/simgear)
+endfunction()
+
+
+function(add_simgear_autotest _name _sources)
+    add_executable(${_name} ${_sources})
+    target_link_libraries(${_name} SimGearCore)
+
+    # for simgear_config.h
+    target_include_directories(${_name} PRIVATE ${PROJECT_BINARY_DIR}/simgear)
+
+    add_test(${_name} ${EXECUTABLE_OUTPUT_PATH}/${_name})
+endfunction()
+
+
+function(add_simgear_scene_autotest _name _sources)
+    add_executable(${_name} ${_sources})
+    target_link_libraries(${_name} SimGearScene)
+
+    # for simgear_config.h
+    target_include_directories(${_name} PRIVATE ${PROJECT_BINARY_DIR}/simgear)
+
+    add_test(${_name} ${EXECUTABLE_OUTPUT_PATH}/${_name})
+endfunction()

CMakeModules/CheckPOSIXFeatures.cmake

@@ -0,0 +1,50 @@
+check_function_exists(gettimeofday HAVE_GETTIMEOFDAY)
+check_function_exists(rint HAVE_RINT)
+check_function_exists(mkdtemp HAVE_MKDTEMP)
+check_function_exists(bcopy HAVE_BCOPY)
+check_function_exists(mmap HAVE_MMAP)
+
+if (NOT MSVC)
+  check_function_exists(timegm HAVE_TIMEGM)
+  if (NOT HAVE_TIMEGM)
+    message(FATAL_ERROR "Non-Windows platforms must support timegm()")
+  endif()
+endif()
+
+if(HAVE_UNISTD_H)
+    set(CMAKE_REQUIRED_INCLUDES ${CMAKE_INCLUDE_PATH})
+    check_cxx_source_compiles(
+       "#include <unistd.h>
+        #if !defined(_POSIX_TIMERS) || (0 >= _POSIX_TIMERS)
+            #error clock_gettime is not supported
+        #endif
+
+        int main() { return 0; }
+        "
+        HAVE_CLOCK_GETTIME)
+endif(HAVE_UNISTD_H)
+
+set(RT_LIBRARY "")
+if(HAVE_CLOCK_GETTIME)
+    check_library_exists(rt clock_gettime "" HAVE_RT)
+    if(HAVE_RT)
+        set(RT_LIBRARY rt)
+    endif(HAVE_RT)
+endif(HAVE_CLOCK_GETTIME)
+
+set(DL_LIBRARY "")
+check_cxx_source_compiles(
+    "#include <dlfcn.h>
+    int main(void) {
+        return 0;
+    }
+    "
+    HAVE_DLFCN_H)
+
+if(HAVE_DLFCN_H)
+    check_library_exists(dl dlerror "" HAVE_DL)
+    if(HAVE_DL)
+        set(DL_LIBRARY "dl")
+    endif()
+endif()
+

CMakeModules/FindUdns.cmake

@@ -39,4 +39,19 @@ else ()
   # show the UDNS_INCLUDE_DIRS and UDNS_LIBRARIES variables only in the advanced view
   mark_as_advanced(UDNS_INCLUDE_DIRS UDNS_LIBRARIES)
 
+  if(UDNS_FOUND)
+ 
+  if(NOT TARGET Udns::Udns)
+    add_library(Udns::Udns UNKNOWN IMPORTED)
+    set_target_properties(Udns::Udns PROPERTIES
+      INTERFACE_INCLUDE_DIRECTORIES "${UDNS_INCLUDE_DIRS}")
+
+      set_target_properties(Udns::Udns PROPERTIES
+        IMPORTED_LINK_INTERFACE_LANGUAGES "C"
+        IMPORTED_LOCATION "${UDNS_LIBRARIES}")
+    
+  endif()
+endif()
+
+
 endif ()

CMakeModules/Packaging.cmake

@@ -0,0 +1,23 @@
+#packaging
+SET(CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/COPYING")
+SET(CPACK_RESOURCE_FILE_README "${PROJECT_SOURCE_DIR}/README")
+SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Simulation support libraries for FlightGear and related projects")
+SET(CPACK_PACKAGE_VENDOR "The FlightGear project")
+SET(CPACK_GENERATOR "TBZ2")
+SET(CPACK_INSTALL_CMAKE_PROJECTS  ${CMAKE_CURRENT_BINARY_DIR};SimGear;ALL;/)
+
+
+# split version string into components, note CMAKE_MATCH_0 is the entire regexp match
+string(REGEX MATCH "([0-9]+)\\.([0-9]+)\\.([0-9]+)" CPACK_PACKAGE_VERSION ${SIMGEAR_VERSION} )
+set(CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1})
+set(CPACK_PACKAGE_VERSION_MINOR ${CMAKE_MATCH_2})
+set(CPACK_PACKAGE_VERSION_PATCH ${CMAKE_MATCH_3})
+
+message(STATUS "version is ${CPACK_PACKAGE_VERSION_MAJOR} dot ${CPACK_PACKAGE_VERSION_MINOR} dot ${CPACK_PACKAGE_VERSION_PATCH}")
+
+set(CPACK_SOURCE_GENERATOR TBZ2)
+set(CPACK_SOURCE_PACKAGE_FILE_NAME "simgear-${SIMGEAR_VERSION}" CACHE INTERNAL "tarball basename")
+set(CPACK_SOURCE_IGNORE_FILES
+  "^${PROJECT_SOURCE_DIR}/.git;\\\\.gitignore;Makefile.am;~$;${CPACK_SOURCE_IGNORE_FILES}")
+
+include (CPack)