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-rw-r--r--clang-tools-extra/clangd/Threading.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/clang-tools-extra/clangd/Threading.cpp b/clang-tools-extra/clangd/Threading.cpp
index 235f26366d3..e0c90f3a1d8 100644
--- a/clang-tools-extra/clangd/Threading.cpp
+++ b/clang-tools-extra/clangd/Threading.cpp
@@ -101,7 +101,8 @@ void wait(std::unique_lock<std::mutex> &Lock, std::condition_variable &CV,
}
void setThreadPriority(std::thread &T, ThreadPriority Priority) {
-#ifdef __linux__
+ // Some *really* old glibcs are missing SCHED_IDLE.
+#if defined(__linux__) && defined(SCHED_IDLE)
sched_param priority;
priority.sched_priority = 0;
pthread_setschedparam(