Compatible to cmake 3.14 (#458)

CMakeLists.txt

@@ -37,7 +37,7 @@ set(PHOTON_FSTACK_SOURCE "" CACHE STRING "")
 set(PHOTON_E2FS_SOURCE "" CACHE STRING "")
 set(PHOTON_GFLAGS_SOURCE "https://github.com/gflags/gflags/archive/refs/tags/v2.2.2.tar.gz" CACHE STRING "")
 set(PHOTON_GOOGLETEST_SOURCE "https://github.com/google/googletest/archive/refs/tags/release-1.12.1.tar.gz" CACHE STRING "")
-set(PHOTON_RAPIDJSON_SOURCE "https://github.com/Tencent/rapidjson/archive/refs/tags/v1.1.0.zip" CACHE STRING "")
+set(PHOTON_RAPIDJSON_GIT "https://github.com/Tencent/rapidjson.git" CACHE STRING "")
 set(PHOTON_RAPIDXML_SOURCE "https://sourceforge.net/projects/rapidxml/files/rapidxml/rapidxml%201.13/rapidxml-1.13.zip/download" CACHE STRING "")
 set(PHOTON_RAPIDYAML_SOURCE "https://github.com/biojppm/rapidyaml/releases/download/v0.5.0/rapidyaml-0.5.0.hpp" CACHE STRING "")
 set(PHOTON_CPP_REDIS_SOURCE "https://github.com/cpp-redis/cpp_redis/archive/refs/tags/4.3.1.tar.gz" CACHE STRING "")

ecosystem/CMakeLists.txt

@@ -3,13 +3,17 @@
 
 include(FetchContent)
 
+if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.24.0") 
+ # set DOWNLOAD_EXTRACT_TIMESTAMP ON cmake 3.24 or above
+ cmake_policy(SET CMP0135 NEW)
+endif()
+
 # Rapidjson
 FetchContent_Declare(
  rapidjson
- URL ${PHOTON_RAPIDJSON_SOURCE}
- URL_HASH SHA256=8e00c38829d6785a2dfb951bb87c6974fa07dfe488aa5b25deec4b8bc0f6a3ab
- PATCH_COMMAND patch -p1 < ${CMAKE_CURRENT_SOURCE_DIR}/patches/rapidjson.patch
- DOWNLOAD_EXTRACT_TIMESTAMP ON
+ GIT_REPOSITORY ${PHOTON_RAPIDJSON_GIT}
+ GIT_TAG v1.1.0
+ PATCH_COMMAND git apply ${CMAKE_CURRENT_SOURCE_DIR}/patches/rapidjson.patch
  UPDATE_DISCONNECTED 1)
 # Pre-set rapidjson build option, prevent building docs, examples and tests
 set(RAPIDJSON_BUILD_DOC OFF CACHE BOOL "Build rapidjson documentation.")
@@ -24,7 +28,6 @@ FetchContent_Declare(
  URL ${PHOTON_RAPIDXML_SOURCE}
  URL_HASH
  SHA256=c3f0b886374981bb20fabcf323d755db4be6dba42064599481da64a85f5b3571
- DOWNLOAD_EXTRACT_TIMESTAMP ON
  UPDATE_DISCONNECTED 1)
 FetchContent_MakeAvailable(rapidxml)
 message(STATUS "Rapidxml source dir: ${rapidxml_SOURCE_DIR}")
@@ -39,6 +42,12 @@ FetchContent_Declare(
  DOWNLOAD_NO_EXTRACT 1
  UPDATE_DISCONNECTED 1)
 FetchContent_MakeAvailable(rapidyaml)
+if (CMAKE_VERSION VERSION_LESS "3.18.0")
+ # Before 3.18, CMake will not copy single header file to src directory
+ file(COPY
+ ${FETCHCONTENT_BASE_DIR}/rapidyaml-subbuild/rapidyaml-populate-prefix/src/rapidyaml-0.5.0.hpp
+ DESTINATION ${rapidyaml_SOURCE_DIR})
+endif()
 message(STATUS "Rapidyaml source dir: ${rapidyaml_SOURCE_DIR}")
 
 # cpp-redis
@@ -47,7 +56,6 @@ FetchContent_Declare(
  URL ${PHOTON_CPP_REDIS_SOURCE}
  URL_HASH
  SHA256=3859289d8254685fc775bda73de03dad27df923423b8ceb375b02d036c03b02f
- DOWNLOAD_EXTRACT_TIMESTAMP ON
  UPDATE_DISCONNECTED 1)
 # uses only a simple header, so do not add sub directory to avoid unnecessary build
 # do not use FetchContent_MakeAvailable, just populate it.