Alexandre Julliard : configure: Add support for using an external libunwind.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: d2e4a6fae0ddf95c7090fcb91548aa4b5242d88f
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=d2e4a6fae0ddf95c7090fcb91548aa4b5242d88f

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Thu Aug 29 14:46:00 2019 +0200

configure: Add support for using an external libunwind.

Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 configure                  | 136 +++++++++++++++++++++++++++++++++++++++++----
 configure.ac               |  37 +++++++++++-
 dlls/ntdll/Makefile.in     |   3 +-
 dlls/ntdll/signal_x86_64.c |   6 +-
 include/config.h.in        |   4 +-
 5 files changed, 167 insertions(+), 19 deletions(-)

Diff:   https://source.winehq.org/git/wine.git/?a=commitdiff;h=d2e4a6fae0ddf95c7090fcb91548aa4b5242d88f