Fix compile requirements

set cmake min. version requirement to 3.15
set googletest cxx compile standard to 14 : https://github.com/google/googletest/releases/tag/v1.14.0

Author: mosfet80

googlemock/CMakeLists.txt.install

@@ -1,5 +1,5 @@
 project(gmock CXX C)
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.15)
 
 find_package(gtest_vendor REQUIRED)
 
@@ -13,7 +13,7 @@ include_directories(
 add_library(gmock STATIC
   ${gtest_vendor_BASE_DIR}/src/gtest-all.cc
   src/gmock-all.cc)
-target_compile_features(gmock PUBLIC cxx_std_11)  # Require C++11
+target_compile_features(gmock PUBLIC cxx_std_14)  # Require C++14
 
 # When building with asan (i.e. using colcon build --mixin asan-gcc),
 # asan itself provides a "fake" pthread that tricks the pthread
@@ -31,4 +31,4 @@ if(NOT WIN32)
 endif()
 
 add_library(gmock_main STATIC src/gmock_main.cc)
-target_compile_features(gmock_main PUBLIC cxx_std_11)  # Require C++11
+target_compile_features(gmock_main PUBLIC cxx_std_14)  # Require C++14

googlemock/CMakeLists.txt.upstream

@@ -36,13 +36,11 @@ endif()
 # as ${gmock_SOURCE_DIR} and to the root binary directory as
 # ${gmock_BINARY_DIR}.
 # Language "C" is required for find_package(Threads).
-if (CMAKE_VERSION VERSION_LESS 3.0)
-  project(gmock CXX C)
-else()
-  cmake_policy(SET CMP0048 NEW)
-  project(gmock VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
-endif()
-cmake_minimum_required(VERSION 2.8.12)
+
+cmake_policy(SET CMP0048 NEW)
+project(gmock VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
+
+cmake_minimum_required(VERSION 3.15)
 
 if (COMMAND set_up_hermetic_build)
   set_up_hermetic_build()

googletest/CMakeLists.txt.install

@@ -1,13 +1,13 @@
 project(gtest CXX C)
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.15)
 
 include_directories(
   include
   .  # to find the source files included with "src/gtest*.cc"
 )
 
 add_library(gtest STATIC src/gtest-all.cc)
-target_compile_features(gtest PUBLIC cxx_std_11)  # Require C++11
+target_compile_features(gtest PUBLIC cxx_std_14)  # Require C++14
 
 # When building with asan (i.e. using colcon build --mixin asan-gcc),
 # asan itself provides a "fake" pthread that tricks the pthread
@@ -25,4 +25,4 @@ if(NOT WIN32)
 endif()
 
 add_library(gtest_main STATIC src/gtest_main.cc)
-target_compile_features(gtest_main PUBLIC cxx_std_11)  # Require C++11
+target_compile_features(gtest_main PUBLIC cxx_std_14)  # Require C++14

googletest/CMakeLists.txt.upstream

@@ -46,14 +46,10 @@ endif()
 
 # Project version:
 
-if (CMAKE_VERSION VERSION_LESS 3.0)
-  project(gtest CXX C)
-  set(PROJECT_VERSION ${GOOGLETEST_VERSION})
-else()
-  cmake_policy(SET CMP0048 NEW)
-  project(gtest VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
-endif()
-cmake_minimum_required(VERSION 2.8.12)
+cmake_policy(SET CMP0048 NEW)
+project(gtest VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
+
+cmake_minimum_required(VERSION 3.15)
 
 if (POLICY CMP0063) # Visibility
   cmake_policy(SET CMP0063 NEW)