From 7c763222150cdf1cb0d79c68f11421fae7b2c457 Mon Sep 17 00:00:00 2001
From: tuxuser <462620+tuxuser@users.noreply.github.com>
Date: Wed, 25 May 2022 07:46:34 +0200
Subject: [PATCH] CMake: build-time test - backwards compatibility with older
 glibc (#1467)

---
 libsrc/leddevice/CMakeLists.txt | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/libsrc/leddevice/CMakeLists.txt b/libsrc/leddevice/CMakeLists.txt
index 82be7df2..4da16a1d 100644
--- a/libsrc/leddevice/CMakeLists.txt
+++ b/libsrc/leddevice/CMakeLists.txt
@@ -139,6 +139,22 @@ if (ENABLE_DEV_USB_HID)
 	else()
 		target_link_libraries(leddevice ${LIBUSB_1_LIBRARIES} hidapi-libusb)
 	endif()
+	if(NOT WIN32)
+		include(CheckCSourceCompiles)
+		# Glibc compatibilty check
+		check_c_source_compiles("
+			#include <time.h>
+			#include <sys/time.h>
+
+			int main() {
+    			struct timespec t;
+    			return clock_gettime(CLOCK_REALTIME, &t);
+			}
+			" GLIBC_HAS_CLOCK_GETTIME)
+		IF(NOT GLIBC_HAS_CLOCK_GETTIME)
+			target_link_libraries(leddevice rt)
+		endif()
+	endif()
 endif()
 
 if(ENABLE_MDNS)