diff --git a/bootstrap b/bootstrap
index ad5e7bdd2..e81ba4d02 100755
--- a/bootstrap
+++ b/bootstrap
@@ -24,11 +24,12 @@ fi
 # bootstrap the autotools
 (
 set -x
-aclocal
+aclocal --warnings=all
+# Apparently, not all versions of libtoolize support option --warnings=all .
 ${libtoolize} --automake --copy
-autoconf
-autoheader
-automake --gnu --add-missing --copy
+autoconf --warnings=all
+autoheader --warnings=all
+automake --warnings=all --gnu --add-missing --copy
 )
 
 if [ -n "$SKIP_SUBMODULE" ]; then