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config.guess: combine two heuristics to detect musl libc

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Apparently, this is needed to correctly detect musl libc in different
versions of Alpine Linux.

According to
https://lists.gnu.org/archive/html/config-patches/2020-09/msg00002.html,
the ldd based check does not work for some old versions of the Alpine Linux,
and, according to
https://lists.gnu.org/archive/html/config-patches/2020-11/msg00002.html,
the compiler may not be available in a fresh Alpine container.

The ldd based check is essentially the same as the check that was
introduced by commit 3d00f60242, it is
performed iff the compiler based check could not give a definitive
answer.

Reported-by: Cheng XU <xucheng@me.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
This commit is contained in:
Dmitry V. Levin
2020-11-05 08:00:00 +00:00
parent 77632d92f2
commit edcc7bbb5d
3 changed files with 23 additions and 7 deletions
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@ -1,3 +1,7 @@
2020-11-17 Dmitry V. Levin <ldv@altlinux.org>
* config.guess: Combine two heuristics to detect musl libc.
2020-11-07 Ben Elliston <bje@gnu.org>
* config.sub, config.guess: Replace backtick `..` substitutions