From b0dfa186838de0874e0084bf0e08d4f0a1d6f15c Mon Sep 17 00:00:00 2001
From: Silvio Traversaro <silvio@traversaro.it>
Date: Tue, 24 Nov 2020 17:05:31 +0100
Subject: [PATCH] SearchForStuff: On Apple platforms do not search for uuid
 library (#2878)

Fix https://github.com/ignitionrobotics/ign-cmake/issues/127
---
 cmake/SearchForStuff.cmake | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/cmake/SearchForStuff.cmake b/cmake/SearchForStuff.cmake
index b698db809a..3d87f4305d 100644
--- a/cmake/SearchForStuff.cmake
+++ b/cmake/SearchForStuff.cmake
@@ -700,9 +700,10 @@ endif()
 
 ########################################
 # Find uuid
-#  - In UNIX we use uuid library.
+#  - In UNIX if not APPLE we use uuid library.
+#  - On APPLE we use the uuid library provided by the OS's SDK.
 #  - In Windows the native RPC call, no dependency needed.
-if (UNIX)
+if (UNIX AND NOT APPLE)
   pkg_check_modules(uuid uuid)
   if (uuid_FOUND)
     message (STATUS "Looking for uuid - found")
@@ -711,6 +712,9 @@ if (UNIX)
     set (HAVE_UUID FALSE)
     BUILD_WARNING ("uuid-dev library not found - Gazebo will not have uuid support.")
   endif ()
+elseif(APPLE)
+  message (STATUS "Using macOS-provided uuid library")
+  set (HAVE_UUID TRUE)
 else()
   message (STATUS "Using Windows RPC UuidCreate function")
   set (HAVE_UUID TRUE)