($(all-subdirs-targets)): Use it in place of -C option.
* Rules: Use $(..) instead of ../ if it's already defined.
* Makeconfig (subdir-srcdirs): New variable.
* csu/Makefile (all-Banner-files): Use it.
* configure.in (--enable-add-ons): Set to "yes" by default.
Handle absolute add-on directory names when looking for configure
fragments. Also look for sysdeps/*/preconfigure fragments in add-ons.
Require add-on configure to set $libc_add_on_canonical, use
that in $add_ons_sfx. Substitute add_on_subdirs with computed list
of subdir names each add-on configure set in libc_add_on_subdirs.
* configure: Regenerated.
* Makefile (%/preconfigure: %/preconfigure.in): New pattern rule.
* config.make.in (add-on-subdirs): New substituted variable.
* Makeconfig (all-subdirs): Include $(add-on-subdirs).
Remove $(add-ons), $(sysdep-subdirs).
Don't filter out $(sysdep-inhibit-subdirs).
($(common-objpfx)sysd-dirs): Target removed. Don't include it.
($(common-objpfx)sysd-sorted): Rewritten to feed Depend and Subdirs
files together to gen-sorted.awk, and $(subdirs) via -v.
(subdirs): Remove magic reordering for mach and hurd.
* scripts/gen-sorted.awk: Use subdirs from command line.
Process Subdirs and Depend files directly.
Let Subdirs files use "first dir" and "inhibit dir".
Always move elf to the end of the list.
* hurd/Depend: New file.
* sysdeps/mach/Subdirs: Use "first mach".
* Makefile (dist-separate): Remove linuxthreads.
(dist-separate-linuxthreads): Variable removed.
(glibc-%.tar rule): Use $(sysdeps-add-ons).
* Makerules ($(common-objpfx)Versions.v.i): Use $(subdirs),
not $(all-subdirs).
(sysdep-makefiles): Use $(sysdirs).
(sysdirs): Remove export.
($(+sysdir_pfx)sysd-rules): Handle absolute directory names in
$(config-sysdirs).
(+sysdir_pfx): Variable removed.
(sysd-rules): Use $(common-objpfx) in place of it.
(sysdirs): Variable moved to ...
* Makeconfig (sysdirs): ... here.
Handle absolute directory names in $(config-sysdirs).
(full_config_sysdirs): Variable removed.
* csu/Makefile: Use $(sysdirs) in vpath directive.
* math/Makefile (ulps-file): Use $(sysdirs).
* sysdeps/gnu/Makefile (errlist-c): Likewise.
($(objpfx)errlist-compat.c): Likewise.
* Makeconfig (all-Subdirs-files): Likewise.
($(common-objpfx)config.status): Likewise.
* configure.in (sysnames): Handle absolute add-on directory names.
(sysdeps_add_ons): New variable, AC_SUBST it.
Compute which add-ons contributed sysdeps directories.
* configure: Regenerated.
* config.make.in (sysdeps-add-ons): New substituted variable.
* Makerules (+sysdep_dirs, +sysdep-includes): Variables moved ...
* Makeconfig: ... to here.
(+sysdep_dirs): Append $(sysdeps-add-ons) here.
(+includes): Remove $(objpfx) include, already in $(+sysdep_dirs).
Remove $(includes).
(sysdep-makeconfigs): Use $(+sysdep_dirs).
($(common-objpfx)shlib-versions.v.i): Likewise.
* Makeconfig: Remove hair to set Makeconfig-add-on.
* sysdeps/unix/Makefile (sysdirs): Remove export.
(asm_CPP): Variable removed.
($(common-objpfx)sysd-syscalls): Pass them directly for the script.
* sysdeps/posix/Makefile: New file.
* Makerules (L_tmpnam, TMP_MAX, L_ctermid, L_cuserid): Set non-posix
values here with ?=.
* stdlib/gen-mpn-copy: File removed.
* stdlib/Makefile (distribute): Remove it.
* configure.in: Don't grok --with-gmp.
* configure: Regenerated.
* configure.in (libc_cv_idn): Don't check it; libidn/configure does it.
* configure: Regenerated.
* bare: Directory removed, saved in ports repository.
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