Don't fail if build dir already exists.

diff --git a/setup b/setup
index 5173638067dc8c27e6b38aeeb598cd275da8f9bb..7e4b406a73204ec44d168133eb637d571c042930 100755 (executable)
--- a/setup
+++ b/setup
@@ -6,4 +6,4 @@ mkaclocal
 autoheader
 autoconf
 automake
 autoheader
 autoconf
 automake

-mkdir build
+mkdir -p build