autogen.sh: Support out-of-tree builds

This allows to do the following:

~/src/shadow/shadow/master$ mkdir .tmp/ && cd .tmp/
~/src/shadow/shadow/master/.tmp$ ../autogen.sh

Link: <https://github.com/shadow-maint/shadow/issues/795>
Reviewed-by: Sam James <sam@gentoo.org>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

diff --git a/autogen.sh b/autogen.sh
index b39ffec4df38c12930605ce9f88f7e7a46332d8c..881e9770cc387afc94bcde6fcc47f25e88e28eea 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,8 +1,8 @@
 #! /bin/sh
 
-autoreconf -v -f --install || exit 1
+autoreconf -v -f --install "$(dirname "$0")" || exit 1
 
-./configure \
+"$(dirname "$0")"/configure \
        CFLAGS="-O2 -Wall" \
        --enable-lastlog \
        --enable-man \