From 2488d1c5b2ee7803e71580a86a8a6925df159b7a Mon Sep 17 00:00:00 2001
From: Silvio Traversaro <silvio@traversaro.it>
Date: Fri, 27 May 2022 19:28:45 +0200
Subject: [PATCH] Do not define TINYOBJLOADER_IMPLEMENTATION when building with
 CMake

---
 src/user/CMakeLists.txt | 1 +
 src/user/user_mesh.cc   | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/src/user/CMakeLists.txt b/src/user/CMakeLists.txt
index 0727c5a9..7432ad9b 100644
--- a/src/user/CMakeLists.txt
+++ b/src/user/CMakeLists.txt
@@ -25,3 +25,4 @@ set(MUJOCO_USER_SRCS
 )
 
 target_sources(mujoco PRIVATE ${MUJOCO_USER_SRCS})
+target_compile_definitions(mujoco PRIVATE MUJOCO_DO_NOT_DEFINE_TINYOBJLOADER_IMPLEMENTATION)
diff --git a/src/user/user_mesh.cc b/src/user/user_mesh.cc
index f3aa3f00..c086ffe6 100644
--- a/src/user/user_mesh.cc
+++ b/src/user/user_mesh.cc
@@ -25,7 +25,11 @@
 #include <string>
 #include <vector>
 
+// This macro is defined when MuJoCo is built with CMake,
+// not defined when MuJoCo is built with other build systems
+#ifndef MUJOCO_DO_NOT_DEFINE_TINYOBJLOADER_IMPLEMENTATION
 #define TINYOBJLOADER_IMPLEMENTATION
+#endif
 
 #include <mujoco/mjmodel.h>
 #include "cc/array_safety.h"