With the introduction of CMake version 3.21, OpenSSL links with ws2_32 and crypt32 on Windows/static. The equivalent library name of ws2_32.lib for WinCE is: ws2.lib. Therefor, the block at line https://github.com/Kitware/CMake/blob/ff7a2e37bfff23ce1751a93b3eba179fbf32a9b6/Modules/FindOpenSSL.cmake#L126, should be: ``` if(WIN32 AND OPENSSL_USE_STATIC_LIBS) set_property( TARGET ${target} APPEND PROPERTY INTERFACE_LINK_LIBRARIES crypt32 ) if(WINCE) set_property( TARGET ${target} APPEND PROPERTY INTERFACE_LINK_LIBRARIES ws2 ) else() set_property( TARGET ${target} APPEND PROPERTY INTERFACE_LINK_LIBRARIES ws2_32 ) endif() ``` Related commit: https://github.com/Kitware/CMake/commit/98fa09d5befbb970fe6230b95f49ee6821d301b1