cmake HAVE_GNU_STACK examples

3MFConsortium/lib3mf Libraries/libressl/CMakeLists.txt :372 

add_definitions(-DHAVE_GNU_STACK)

yanhua133/mediasoup-sfu-cpp deps/libressl/CMakeLists.txt :303 

add_definitions(-DHAVE_GNU_STACK)

cvet/fonline ThirdParty/LibreSSL/CMakeLists.txt :399 

add_definitions(-DHAVE_GNU_STACK)