CMake Build Error - Could not Find OpenSSL on Windows 10

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When I was building Hadoop 3.3.0 on Windows 10, I hit one error about OpenSSL:

CMake Error at C:/Program Files/CMake/share/cmake-3.18/Modules/FindPackageHandleStandardArgs.cmake:165 (message):
  Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the

This error was raised by the following line in CMakeLists.txt:

find_package(OpenSSL REQUIRED)

The following is my environment setup:

-- Building for: Visual Studio 16 2019
-- Selecting Windows SDK version 10.0.18362.0 to target Windows 10.0.18363.
-- The C compiler identification is MSVC 19.26.28806.0
-- The CXX compiler identification is MSVC 19.26.28806.0

CMake version

CMake version is 3.18.0.

C:\hdp\cmaketest>cmake --version
cmake version 3.18.0

CMake suite maintained and supported by Kitware (

Microsoft Visual C++ version

MSVC 19.26.28806.0

OpenSSL version

OpenSSL is installed on Windows using Microsoft vcpkg (a package manager for C++). The version installed in OpenSSL 1.1.18.

C:\hdp\cmaketest>openssl version
OpenSSL 1.1.1g  21 Apr 2020

Reproduce the issue

Follow the steps below can reproduce this issue.

  1. Create project folder C:\hdp\cmaketest
  2. Create file CMakeLists.txt in the project folder with the following content:
    cmake_minimum_required(VERSION 3.10)
    # set the project name
    # Find package
    find_package(OpenSSL REQUIRED)
  3. Run CMake command:
    cmake .
    The error will occur as the following screenshot shows:

Fix this issue

In my system, OpenSSL is installed via vcpkg and installation folder is: C:/vcpkg/installed/x64-windows-static.

Thus to fix this issue, I just need to change the command line to the following:

cmake . -DOPENSSL_ROOT_DIR="C:/vcpkg/installed/x64-windows-static"

The above command line tells CMake that OpenSSL root folder is in the above directory. If you OpenSSL is installed with different triplet or location, please update the command line accordingly. 


CMake: Could NOT find OpenSSL

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