Unable to build libwebsockets library due to CMake

问题:

I am trying to build libwebsockets on Windows 10 using CMake and MinGW. The library requires OpenSSL.

Environment Variables: OPENSSL_CONF=C:\Program Files (x86)\OpenSSL-Win32\bin\openssl.cfg OPENSSL_ROOT_DIR=C:\Program Files (x86)\OpenSSL-Win32

I'm using this to build: cmake -G "MinGW Makefiles" -DCMAKE_INSTALL_PREFIX=D:/MinGW -DOPENSSL_LIBRARIES="C:\Program Files (x86)\OpenSSL-Win32\lib" -DOPENSSL_CONF="C:\Program Files (x86)\OpenSSL-Win32\openssl.cfg" -DOPENSSL_INCLUDE_DIR="C:\Program Files (x86)\OpenSSL-Win32\include" ..\

The error I get is:

Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the system variable OPENSSL_ROOT_DIR (missing: OPENSSL_LIBRARIES) (found version "1.1.0")

I downloaded the OpenSSL binaries from a community build and have used both 64 and 32 versions.

I've even modified the CMake file to confirm the variables were being passed in.

回答1:

This was a problem with the version of CMake I was using. I upgraded from CMake 3.3.x to 3.6.2 and the build is now successful.