From 23d644e7661a09f13fd90b6836b0a1361e5a5d89 Mon Sep 17 00:00:00 2001
From: Xie Han <63350856@qq.com>
Date: Wed, 17 Jul 2024 16:12:42 +0800
Subject: [PATCH] Update C++ standard to c++14.

---
 src/CMakeLists.txt      |  2 +-
 test/CMakeLists.txt     | 17 +----------------
 tutorial/CMakeLists.txt |  2 +-
 3 files changed, 3 insertions(+), 18 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 3b47ee69..7c2d5b3b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -60,7 +60,7 @@ if (WIN32)
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP /wd4200 /Zc:__cplusplus /std:c++14")
 else ()
 	set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wall -fPIC -pipe -std=gnu90")
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=c++11 -fno-exceptions")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=c++14 -fno-exceptions")
 endif ()
 
 add_subdirectory(generator)
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 6d35c10d..82a2252c 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -68,22 +68,7 @@ else ()
 	find_package(GTest REQUIRED)
 endif ()
 
-set(CXX_STD "c++11")
-if (GTest_VERSION VERSION_GREATER_EQUAL "1.13.0")
-	set(CXX_STD "c++14")
-else ()
-	get_filename_component(GTEST_PATH ${GTEST_LIBRARY} DIRECTORY ABSOLUTE)
-	execute_process(COMMAND grep Version "${GTEST_PATH}/pkgconfig/gtest.pc"
-					RESULT_VARIABLE GTEST_VERSION_RESULT
-					OUTPUT_VARIABLE GTEST_VERSION_OUTPUT)
-	if (${GTEST_VERSION_RESULT} EQUAL "0")
-		string(REPLACE " " ";" GTEST_VERSION_STR ${GTEST_VERSION_OUTPUT})
-		list(GET GTEST_VERSION_STR 1 GTEST_VERSION)
-		if (${GTEST_VERSION} VERSION_GREATER_EQUAL "1.13.0")
-			set(CXX_STD "c++14")
-		endif ()
-	endif ()
-endif ()
+set(CXX_STD "c++14")
 
 if (WIN32)
 	set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   /MP /wd4200")
diff --git a/tutorial/CMakeLists.txt b/tutorial/CMakeLists.txt
index f2f8eff7..970bfb8c 100644
--- a/tutorial/CMakeLists.txt
+++ b/tutorial/CMakeLists.txt
@@ -107,7 +107,7 @@ if (WIN32)
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP /wd4200 /Zc:__cplusplus /std:c++14")
 else ()
 	set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wall -fPIC -pipe -std=gnu90")
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=c++11 -fno-exceptions")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -fPIC -pipe -std=c++14 -fno-exceptions")
 endif ()
 
 set(TUTORIAL_PB_LIST