From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: libpthread fails to build as an add-on
Date: Sun, 23 Mar 2014 22:38:30 +0100
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	(Manolis Ragkousis's message of "Sun, 23 Mar 2014 09:17:36 +0000")
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To: Manolis Ragkousis <manolis837@gmail.com>
Cc: Guix-devel@gnu.org, Samuel Thibault <sthibault@alioth.debian.org>, bug-hurd@gnu.org

Manolis Ragkousis <manolis837@gmail.com> skribis:

> In the debian package I saw there are 2 patches that add this.
>
>>  +libc_add_on_canonical=3Dlibpthread
>>  +libc_add_on_subdirs=3D.
>
> How does this change the configure process?

Libc=E2=80=99s top-level configure file expects these two variables to be s=
et by
the add-on=E2=80=99s =E2=80=98configure=E2=80=99 script:

--8<---------------cut here---------------start------------->8---
    libc_add_on_frag=3D$libc_add_on_srcdir/configure
    libc_add_on_canonical=3D
    libc_add_on_config_subdirs=3D
    if test -r "$libc_add_on_frag"; then
      AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
      libc_add_on_canonical=3Dunknown
      libc_add_on_subdirs=3D
      . "$libc_add_on_frag"         ##### =E2=86=90 here, runs libpthread/c=
onfigure
      test -z "$libc_add_on" || {
	configured_add_ons=3D"$configured_add_ons $libc_add_on"
	if test "x$libc_add_on_canonical" =3D xunknown; then
	  AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
	fi
--8<---------------cut here---------------end--------------->8---

So when libpthread is built as an add-on, libpthread/configure must set
them, AFAIU.

HTH,
Ludo=E2=80=99.