1 files changed, 55 insertions, 0 deletions
diff --git a/build/moz.configure/libraries.configure b/build/moz.configure/libraries.configure
new file mode 100644
index 0000000000..cac37e0ae5
--- /dev/null
+++ b/build/moz.configure/libraries.configure
@@ -0,0 +1,55 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+@template
+def check_clock_monotonic_support(lib=None, when=None):
+    check_msg = "for clock_gettime(CLOCK_MONOTONIC)"
+    flags = []
+
+    if lib is not None:
+        check_msg += f" in {lib}"
+        flags.append(f"-l{lib}")
+
+    check_when = building_with_gnu_cc
+    if when is not None:
+        check_when &= when
+
+    return try_link(
+        includes=["time.h"],
+        body="struct timespec ts; clock_gettime(CLOCK_MONOTONIC, &ts);",
+        check_msg=check_msg,
+        flags=flags,
+        when=check_when,
+    )
+
+
+have_raw_clock_monotonic_support = check_clock_monotonic_support()
+have_rt_clock_monotonic_support = check_clock_monotonic_support(
+    lib="rt", when=~have_raw_clock_monotonic_support
+)
+
+set_define(
+    "HAVE_CLOCK_MONOTONIC",
+    have_raw_clock_monotonic_support | have_rt_clock_monotonic_support,
+)
+set_config(
+    "HAVE_CLOCK_MONOTONIC",
+    have_raw_clock_monotonic_support | have_rt_clock_monotonic_support,
+)
+
+set_config("REALTIME_LIBS", ["-lrt"], when=have_rt_clock_monotonic_support)
+
+
+have_res_ninit = try_link(
+    includes=["sys/types.h", "netinet/in.h", "arpa/nameser.h", "resolv.h"],
+    body="int foo = res_ninit(&_res);",
+    check_msg="for res_ninit()",
+    flags=depends(when=building_linux)(["-D_BSD_SOURCE=1"]),
+    when=building_with_gnu_cc & ~target_is_netbsd & ~target_is_openbsd,
+)
+
+set_define("HAVE_RES_NINIT", have_res_ninit)