From 940c425c19e50a9ded2629422db54785802143af Mon Sep 17 00:00:00 2001
From: Guilhem Saurel <guilhem.saurel@laas.fr>
Date: Tue, 21 Jan 2025 17:15:53 +0100
Subject: [PATCH] CMake: add DART_USE_SYSTEM_PYBIND11 (#1907)

---
 CMakeLists.txt        |  1 +
 python/CMakeLists.txt | 18 +++++++++++-------
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fdfe749467f2b..a826e884bd229 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -101,6 +101,7 @@ dart_option(DART_FORCE_COLORED_OUTPUT
 dart_option(DART_USE_SYSTEM_IMGUI "Use system ImGui" OFF)
 dart_option(DART_USE_SYSTEM_GOOGLEBENCHMARK "Use system GoogleBenchmark" OFF)
 dart_option(DART_USE_SYSTEM_GOOGLETEST "Use system GoogleTest" OFF)
+dart_option(DART_USE_SYSTEM_PYBIND11 "Use system pybind11" OFF)
 
 #===============================================================================
 # Print intro
diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index 37cadf4f8de14..de79041bb4b7c 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -6,13 +6,17 @@ if(NOT DART_BUILD_DARTPY)
 endif()
 
 # Set up pybind11
-include(FetchContent)
-FetchContent_Declare(
-  pybind11
-  GIT_REPOSITORY https://github.com/pybind/pybind11
-  GIT_TAG v2.12.0
-)
-FetchContent_MakeAvailable(pybind11)
+if(DART_USE_SYSTEM_PYBIND11)
+  find_package(pybind11 CONFIG REQUIRED)
+else()
+  include(FetchContent)
+  FetchContent_Declare(
+    pybind11
+    GIT_REPOSITORY https://github.com/pybind/pybind11
+    GIT_TAG v2.12.0
+  )
+  FetchContent_MakeAvailable(pybind11)
+endif()
 
 if(NOT pybind11_FOUND)
   message(WARNING "Disabling [dartpy] due to missing pybind11 >= 2.2.0.")