From ee8f4c3135c0ae8e4a421df8dd3ea832d8724542 Mon Sep 17 00:00:00 2001
From: Guilhem Lavaux <guilhem.lavaux@iap.fr>
Date: Mon, 7 Jul 2025 13:22:12 +0200
Subject: [PATCH] fix: add cmake policy minimum version to a sane value for
 Eigen

---
 external/external_build.cmake | 1 +
 1 file changed, 1 insertion(+)

diff --git a/external/external_build.cmake b/external/external_build.cmake
index 997cc4d..54a9a27 100644
--- a/external/external_build.cmake
+++ b/external/external_build.cmake
@@ -383,6 +383,7 @@ IF (INTERNAL_EIGEN)
      CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${EXT_INSTALL}
        -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
        -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+       -DCMAKE_POLICY_VERSION_MINIMUM=3.5
   )
   SET(EIGEN3_INCLUDEDIR ${EXT_INSTALL}/include/eigen3)