From 9e3fb4ea940ee67bb4669cc199db7b575bf34f69 Mon Sep 17 00:00:00 2001
From: Yesudeep Mangalapilly <yesudeep@gmail.com>
Date: Fri, 8 Oct 2021 08:55:39 -0700
Subject: [PATCH] Fix linker errors on FreeBSD.

---
 BUILD.bazel | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/BUILD.bazel b/BUILD.bazel
index 3b25878a..1df5ff5f 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -46,6 +46,16 @@ config_setting(
     constraint_values = ["@platforms//os:windows"],
 )
 
+config_setting(
+    name = "freebsd",
+    constraint_values = ["@platforms//os:freebsd"],
+)
+
+config_setting(
+    name = "openbsd",
+    constraint_values = ["@platforms//os:openbsd"],
+)
+
 config_setting(
     name = "msvc_compiler",
     flag_values = {
@@ -110,6 +120,8 @@ cc_library(
     linkopts = select({
         ":qnx": ["-lregex"],
         ":windows": [],
+        ":freebsd": ["-lm", "-pthread"],
+        ":openbsd": ["-lm", "-pthread"],
         "//conditions:default": ["-pthread"],
     }),
     deps = select({