On Alpine Linux, using gcc12, we run now into this compile warning as error :
In file included from /openjdk/linuxmuslx86_64/jdk/test/jdk/java/io/File/libGetXSpace.c:31:
/usr/include/sys/errno.h:1:2: error: #warning redirecting incorrect #include <sys/errno.h> to <errno.h> [-Werror=cpp]
    1 | #warning redirecting incorrect #include <sys/errno.h> to <errno.h>
      | ^~~~~~~
cc1: all warnings being treated as errors

Not sure if this warning makes a lot of sense, but we probably better just include <errno.h> like it is done at almost all other places in the codebase ?