Mesa (master): configure.ac: simplify --enable-libunwind=auto check

[Eric Engeström]

Module: Mesa
Branch: master
Commit: 845d07978f8eef9b87b952c430edcb8c2b50b1b5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=845d07978f8eef9b87b952c430edcb8c2b50b1b5

Author: Eric Engestrom <eric.engestrom at imgtec.com>
Date:   Thu Jun  1 15:06:57 2017 +0100

configure.ac: simplify --enable-libunwind=auto check

Signed-off-by: Eric Engestrom <eric.engestrom at imgtec.com>
Reviewed-by: Emil Velikov <emil.velikov at collabora.com>

---

 configure.ac | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/configure.ac b/configure.ac
index b57be07e24..5caf316089 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1066,16 +1066,12 @@ AC_SUBST([LLVM_INCLUDEDIR])
 dnl
 dnl libunwind
 dnl
+PKG_CHECK_EXISTS(libunwind, [HAVE_LIBUNWIND=yes], [HAVE_LIBUNWIND=no])
 AC_ARG_ENABLE([libunwind],
     [AS_HELP_STRING([--enable-libunwind],
             [Use libunwind for backtracing (default: auto)])],
         [LIBUNWIND="$enableval"],
-        [LIBUNWIND="auto"])
-
-PKG_CHECK_EXISTS(libunwind, [HAVE_LIBUNWIND=yes], [HAVE_LIBUNWIND=no])
-if test "x$LIBUNWIND" = "xauto"; then
-    LIBUNWIND="$HAVE_LIBUNWIND"
-fi
+        [LIBUNWIND="$HAVE_LIBUNWIND"])
 
 if test "x$LIBUNWIND" = "xyes"; then
     PKG_CHECK_MODULES(LIBUNWIND, libunwind)