+AC_CHECK_PROG([HAVE_ASCIIDOCTOR_PDF], [asciidoctor-pdf], yes, no)
+if test "x$HAVE_ASCIIDOCTOR_PDF" = "xno"; then
+ AC_MSG_WARN([asciidoctor-pdf not found, PDF docs will not be built])
+fi
+AM_CONDITIONAL([ASCIIDOCTOR_PDF], [test x$HAVE_ASCIIDOCTOR_PDF != xno])
+
+AC_ARG_WITH([strip-nondeterminism],
+ [AS_HELP_STRING([--with-strip-nondeterminism],
+ [Name of non-deterministic build data stripping tool])],
+ [],
+ [with_strip_nondeterminism=auto])
+
+if test "x$with_strip_nondeterminism" != "xno"; then
+ if test "x$with_strip_nondeterminism" = "xauto"; then
+ with_strip_nondeterminism="strip-nondeterminism"
+ AC_CHECK_PROG([HAVE_STRIP_NONDETERMINISM],[$with_strip_nondeterminism], yes, no)
+ else
+ HAVE_STRIP_NONDETERMINISM=yes
+ fi
+else
+ HAVE_STRIP_NONDETERMINISM=no
+fi
+AM_CONDITIONAL([STRIP_NONDETERMINISM], [test x$HAVE_STRIP_NONDETERMINISM != xno])
+AC_SUBST(STRIP_NONDETERMINISM, "$with_strip_nondeterminism")
+
+PKG_CHECK_MODULES([JANSSON], [jansson])
+
+AC_ARG_WITH([readline],
+ [AS_HELP_STRING([--with-readline],
+ [enable readline functionality in ao-dbg @<:@default=auto@:>@])],
+ [],
+ [with_readline=auto])
+
+LIBREADLINE_LIBS=
+
+if test x"$with_readline" != "xno"; then
+ AC_CHECK_LIB([readline], [main],
+ [AC_SUBST([LIBREADLINE], ["-lreadline -lncurses"])
+ AC_DEFINE([HAVE_LIBREADLINE], [1],
+ [Define if you have libreadline])],
+ [if test "x$with_readline" != xauto; then
+ AC_MSG_ERROR([--with-readline was given, but test for readline failed])
+ fi],
+ -lncurses)
+fi