Compilation and Linking errors when building googletest with PlatformIO

[VineetaNarkhede-eaton]

1. I have downloaded the latest GoogleTest source code manually and placed it at a known location in my project.

• tool-cmake 3.16.4
• toolchain-gccarmnoneeabi (8.2.1)
• framework-zephyr 2.6.0

I am getting linking errors, some of them are given below:

• .pio/build/nucleo_f429zi/googletest-main/googletest/libgtest.a(gtest-all.cc.o): in function testing::internal::ColoredPrintf(testing::internal::(anonymous namespace)::GTestColor, char const*, ...)': gtest-all.cc:(.text+0xa508): undefined reference to __sync_synchronize'
• .pio/build/nucleo_f429zi/googletest-main/googletest/libgtest.a(gtest-all.cc.o): in function testing::internal::FilePath::CreateFolder() const':gtest-all.cc:(.text+0x1af3c): undefined reference to mkdir'
• .platformio/packages/toolchain-gccarmnoneeabi/arm-none-eabi/lib/thumb/v7e-m/nofp\libc_nano.a(lib_a-statr.o): in function _stat_r':statr.c:(.text._stat_r+0xe): undefined reference to _stat'

How to fix there errors?
GoogleTest cmake files says cmake_minimum_required(VERSION 3.5) and cmake tool I am having is 3.16.4, will it cause any issue?

2. I have Added "set(CMAKE_CXX_COMPILE_FEATURES cxx_std_11)" and "set(CMAKE_CXX_STANDARD 11)" in main CMakeLists.txt
3. Turned on gtest_disable_pthreads to remove pthread related errors and std namespace undefined errors, option(gtest_disable_pthreads "Disable uses of pthreads in gtest." ON).
Turned on CMAKE_CXX_EXTENSIONS to remove errors like 'fileno' was not declared in scope, set(CMAKE_CXX_EXTENSIONS ON).
Will these changes impact gtest functionality or disable any important features?