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dnl Copyright (c) Facebook, Inc. and its affiliates.
dnl
dnl This source code is licensed under the MIT license found in the
dnl LICENSE file in the root directory of this source tree.
dnl AC_ASSERT_OCAML_PKG([pkg_name], [pkg_version])
dnl
dnl fails if $pkg_name is not installed; also fails if it is not
dnl installed at version $pkg_version if specified
dnl
dnl assumes that AC_PROG_FINDLIB has been called
AC_DEFUN([AC_ASSERT_OCAML_PKG],
[dnl
AC_CHECK_OCAML_PKG_PATH([$1], [$2], [$3])
unset has_pkg
unset pkg
unset version
AS_IF([test "$OCAMLFIND" = "no"], [dnl
# trick to detect if ocamlfind is correctly installed and give the
# right opam instructions to install it if not since they're the
# same as when any other opam package is missing.
has_pkg=no
pkg=ocamlfind
version=
], [dnl
has_pkg=$AS_TR_SH[OCAML_PKG_$1]
pkg=$1
version=
AS_IF([test "x$3" != "x"], [dnl
version=" version $3"
])
])
AS_IF([test "$has_pkg" = "no"], [dnl
AC_MSG_ERROR([missing OCaml dependency: $pkg$version
If you are using opam, please run
opam update
opam install --deps-only opam/infer.opam])
])
])