adds /build dir to gitignore Documentation https://github.com/mity/md4c/wiki/Building-MD4C says to use build/ for cmake. I noticed that .gitignore contains a directory called build-aux -- perhaps the author were using that and either forgot to update the gitignore file or the documentation.
diff --git a/.gitignore b/.gitignore
index 681d0a6..a233ed1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -62,6 +62,7 @@ dkms.conf
# autotools
/aclocal.m4
/autom4te.cache/
+/build/
/build-aux/
conf*.dir/
/config.h