Support out-of-source builds

Fixes issue #167. Long after closing this issue (kind of wontfix) we have switched to
GNU make and can thus use its features like VPATH.

1 files changed, 2 insertions, 0 deletions

diff --git a/config.mk b/config.mk
index cf2f946..3aa3cf2 100644
--- a/config.mk
+++ b/config.mk
@@ -1,3 +1,5 @@
+SRCDIR    := .
+
 PREFIX    := /usr/local
 MANPREFIX := $(PREFIX)/share/man