From 5126e6ea612b2b7fe2e5ec23bae1a62dc596454a Mon Sep 17 00:00:00 2001
From: Daniel Agar <daniel@agar.ca>
Date: Tue, 1 Oct 2019 14:31:39 -0400
Subject: [PATCH] cmake: use gold linker if available

---
 CMakeLists.txt | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6169446bcc..da3f1d1d67 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -208,6 +208,25 @@ endif()
 
 #=============================================================================
 
+# gold linker - use if available
+include(CMakeDependentOption)
+CMAKE_DEPENDENT_OPTION(USE_LD_GOLD
+                      "Use GNU gold linker" ON
+                      "NOT WIN32;NOT APPLE" OFF
+)
+
+if(USE_LD_GOLD)
+	execute_process(COMMAND ${CMAKE_C_COMPILER} -fuse-ld=gold -Wl,--version ERROR_QUIET OUTPUT_VARIABLE LD_VERSION)
+	if("${LD_VERSION}" MATCHES "GNU gold")
+		set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fuse-ld=gold")
+		set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -fuse-ld=gold")
+	else()
+		set(USE_LD_GOLD OFF)
+	endif()
+endif()
+
+#=============================================================================
+
 # Setup install paths
 if (${PX4_PLATFORM} STREQUAL "posix")