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

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

diff --git a/configure.ac b/configure.ac
index b57be07e24ac7ce997ff1a8d3a0c5f7f5d35fc2e..5caf316089aac684e0ab72f73fa00a584bf67bda 100644 (file)
--- 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)