build.sh: look in m4 dir for macro's

This fixes #2674

diff --git a/build.sh b/build.sh
index 40f5361..97e55d8 100755 (executable)
--- a/build.sh
+++ b/build.sh
@@ -48,7 +48,7 @@ fi
 set -x
 
 autoheader \
-&& aclocal \
+&& aclocal -I m4 \
 && $libtoolize --copy --force \
 && automake --add-missing --copy \
 && autoconf