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AC_DEFUN([DOVECOT_WANT_UNWIND], [
have_libunwind=no
AS_IF([test "$want_libunwind" != "no"], [
PKG_CHECK_EXISTS([libunwind], [
PKG_CHECK_MODULES([LIBUNWIND], [libunwind-generic],[
have_libunwind=yes
AC_DEFINE([HAVE_LIBUNWIND],,[Define this if you have libunwind])
])
])
])
AC_MSG_CHECKING([whether we will be linking with libunwind]);
AS_IF([test "$want_libunwind" = yes], [
AS_IF([test "$have_libunwind" != yes], [
AC_MSG_ERROR([Cannot find libunwind])
])
])
AC_MSG_RESULT([$have_libunwind])
])
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