[Qemu-commits] [qemu/qemu] 18f498: configure: Fix shell syntax to placate OpenBSD's p...

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/qemu/qemu
  Commit: 18f49881cf8359e89396aac12f5d3cf3f8a632ba
      
https://github.com/qemu/qemu/commit/18f49881cf8359e89396aac12f5d3cf3f8a632ba
  Author: Peter Maydell <address@hidden>
  Date:   2015-12-18 (Fri, 18 Dec 2015)

  Changed paths:
    M configure

  Log Message:
  -----------
  configure: Fix shell syntax to placate OpenBSD's pdksh

Unfortunately the OpenBSD pdksh does not like brackets inside
the right part of a ${variable+word} parameter expansion:

  $ echo "${a+($b)}"
  ksh: ${a+($b)}": bad substitution

though both bash and dash accept them. In any case this line
was causing odd output in the case where nettle is not present:
  nettle    no ()

(because if nettle is not present then $nettle will be "no",
not a null string or unset).

Rewrite it to just use an if.

This bug was originally introduced in becaeb726 and was present
in the 2.4.0 release.

Fixes: https://bugs.launchpad.net/qemu/+bug/1525682
Reported-by: Dmitrij D. Czarkoff
Cc: address@hidden
Signed-off-by: Peter Maydell <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Message-id: address@hidden