1 The 4.09.1 tarball appears to have been acidentally generated as a
2 development tarball, which causes configure to enable -Werror. This
3 means newer compilers will make the build fail.
5 diff a/configure b/configure
8 @@ -12360,7 +12360,7 @@ case $ocaml_cv_cc_vendor in #(
10 outputobj=-Fo; CPP="cl -nologo -EP"; gcc_warnings="" ;; #(
12 - outputobj='-o $(EMPTY)'; case 4.09.1+dev1-2020-03-13 in #(
13 + outputobj='-o $(EMPTY)'; case 4.09.1 in #(
15 gcc_warnings="-Wall -Werror" ;; #(