From 048becec9222eb16fb9e42184c03502fddccb285 Mon Sep 17 00:00:00 2001
From: dimonp <dmitrypeter@gmail.com>
Date: Wed, 1 Apr 2026 13:36:11 +0600
Subject: [PATCH] Fix linkage issue for ai_epsilon in C++20 modules (#6592)

* Add inline to ai_epsilon to avoid ODR violations
---------

Co-authored-by: Kim Kulling <kimkulling@users.noreply.github.com>
---
 include/assimp/defs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/assimp/defs.h b/include/assimp/defs.h
index 406deb5fb..df45525c1 100644
--- a/include/assimp/defs.h
+++ b/include/assimp/defs.h
@@ -299,7 +299,7 @@ typedef unsigned int ai_uint;
 
 /* Numerical limits */
 #ifdef __cplusplus
-constexpr ai_real ai_epsilon = (ai_real) 1e-6;
+inline constexpr ai_real ai_epsilon = (ai_real) 1e-6;
 #else
 #  define ai_epsilon ((ai_real)1e-6)
 #endif