From 29a657bc77337072fc140cfdf27d4797f8f0d673 Mon Sep 17 00:00:00 2001
From: Paul Licameli <paul.licameli@audacityteam.org>
Date: Fri, 2 Oct 2020 18:05:30 -0400
Subject: [PATCH] CMake function addlib can be called multiply for the same
 library

---
 cmake-proxies/cmake-modules/AudacityFunctions.cmake | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cmake-proxies/cmake-modules/AudacityFunctions.cmake b/cmake-proxies/cmake-modules/AudacityFunctions.cmake
index 98a427456..f1e0940dc 100644
--- a/cmake-proxies/cmake-modules/AudacityFunctions.cmake
+++ b/cmake-proxies/cmake-modules/AudacityFunctions.cmake
@@ -443,6 +443,10 @@ function( addlib dir name symbol required check )
    # Let the Audacity target know that this library will be used
    set( USE_${symbol} ON CACHE INTERNAL "" FORCE )
 
+   if ( TARGET "${TARGET}" )
+      return()
+   endif()
+ 
    message( STATUS "========== Configuring ${name} ==========" )
 
    # Check for the system package(s) if the user prefers it