kfreebsd-kernel-headers 0.70 includes properly patched versions of
<sys/syscall.h> and <sys/errno.h> which could be used to compile glibc.
Please consider using those instead of the in-tree copies. A patch for
<bits/errno.h> is attached. <sys/syscall.h> can be used directly.
No, the <bits/errno.h> have to be part of eglibc,
you can silently break ABI, by changing errno.h.
In fact, due to changes of ELAST it just happened, see
glibc-ports/kfreebsd/Versions and lines
# The comment lines with "#errlist-compat" are magic; see errlist-compat.awk.
# When you get an error from errlist-compat.awk, you need to add a new
#errlist-compat 87
#errlist-compat 93
#errlist-compat 94
The <sys/syscall.h> problem is similar, FreeBSD upstream sometimes
changes ABI of a syscall, it usually gives the new number for same syscall
name. The eglibc have to know which one is used, i.e. the exact interface.
See i.e. mmap.c. Again, silent upgrade of sys/syscall.h might be disaster.
Petr
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