build-sys: Enable subdir-objects option

Automake 1.14 throws a warning when source files are in a sub directory
and the 'subdir-objecs' option is not enabled.

News: https://lists.gnu.org/archive/html/automake/2013-06/msg00040.html

diff --git a/configure.ac b/configure.ac
index 616a9902d4ca09c699589359ff32fc6e78b75b95..5b052e2014094d1c5714d71c61c6d017ad8fc9ee 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -27,7 +27,7 @@ AC_CONFIG_SRCDIR([src/daemon/main.c])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_HEADERS([config.h])
 AC_CONFIG_AUX_DIR([build-aux])
-AM_INIT_AUTOMAKE([foreign 1.11 -Wall -Wno-portability silent-rules color-tests dist-xz tar-ustar])
+AM_INIT_AUTOMAKE([foreign 1.11 -Wall -Wno-portability subdir-objects silent-rules color-tests dist-xz tar-ustar])
 
 AS_IF([! test -n "$VERSION"], [
    AC_MSG_ERROR([git-version-gen failed])