https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118518
--- Comment #11 from Benjamin Schulz <schulz.benjamin at googlemail dot com> --- if i write something like this: SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fopenacc -foffload=nvptx-none -foffload=-malias -fcf-protection=none -fno-stack-protector -U_FORTIFY_SOURCE -std=c++23 -no-pie") it still complains that alias definitions are not supported.