From ab94ddbd0e11403ecc7f60dc737fd7cb4037acfa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nenad=20Miks=CC=8Ca?= <nenad.miksa@microblink.com>
Date: Sun, 31 Aug 2025 10:53:41 +0200
Subject: [PATCH] avoid `-lpthread` link option when building with emscripten
 without threads

- having this flag causes emscripten to generate binary with pthread
  support, which is not compatible with browsers that do not support
  pthreads or with web pages that do not enable pthread support
---
 BUILD.bazel | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/BUILD.bazel b/BUILD.bazel
index 3ca5735db0..1de1cea867 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -56,6 +56,16 @@ config_setting(
     constraint_values = ["@platforms//os:openbsd"],
 )
 
+config_setting(
+    name = "emscripten_without_threads",
+    constraint_values = [
+        "@platforms//os:emscripten",
+    ],
+    values = {
+        "features": "-use_pthreads",
+    },
+)
+
 # NOTE: Fuchsia is not an officially supported platform.
 config_setting(
     name = "fuchsia",
@@ -111,10 +121,12 @@ cc_library(
     copts = select({
         ":qnx": [],
         ":windows": [],
+        ":emscripten_without_threads": [],
         "//conditions:default": ["-pthread"],
     }),
     defines = select({
         ":has_absl": ["GTEST_HAS_ABSL=1"],
+        ":emscripten_without_threads": ["GTEST_HAS_PTHREAD=0"],
         "//conditions:default": [],
     }),
     features = select({
@@ -138,6 +150,7 @@ cc_library(
             "-lm",
             "-pthread",
         ],
+        ":emscripten_without_threads": [],
         "//conditions:default": ["-pthread"],
     }),
     deps = select({