From 42742fadc1fb7085fc950df9108263fdffc2f0e7 Mon Sep 17 00:00:00 2001
From: Arne Morten Kvarving <arne.morten.kvarving@sintef.no>
Date: Thu, 29 Jan 2026 15:41:49 +0100
Subject: [PATCH] add use_only_needed to targets

---
 CMakeLists.txt                   | 2 ++
 python/simulators/CMakeLists.txt | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9a5f7eb38e..553e25a053 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -569,6 +569,7 @@ add_library(MainDispatchDynamic OBJECT opm/simulators/flow/MainDispatchDynamic.c
 use_warnings(TARGET MainDispatchDynamic)
 use_fast_build(TARGET MainDispatchDynamic)
 use_additional_optimization(TARGET MainDispatchDynamic)
+use_only_needed(TARGET MainDispatchDynamic)
 set_property(TARGET MainDispatchDynamic PROPERTY POSITION_INDEPENDENT_CODE ON)
 
 # We only wait for the hipification process if we are compiling HIP.
@@ -611,6 +612,7 @@ foreach(OBJ ${COMMON_MODELS} ${FLOW_MODELS} ${FLOW_VARIANT_MODELS})
   use_warnings(TARGET flow_lib${OBJ})
   use_fast_build(TARGET flow_lib${OBJ})
   use_additional_optimization(TARGET flow_lib${OBJ})
+  use_only_needed(TARGET flow_lib${OBJ})
   list(APPEND FLOW_TGTS $<TARGET_OBJECTS:flow_lib${OBJ}>)
   if(TARGET fmt::fmt)
     target_link_libraries(flow_lib${OBJ} PRIVATE fmt::fmt)
diff --git a/python/simulators/CMakeLists.txt b/python/simulators/CMakeLists.txt
index 802b48a0d3..7f6183666c 100644
--- a/python/simulators/CMakeLists.txt
+++ b/python/simulators/CMakeLists.txt
@@ -53,6 +53,7 @@ pybind11_add_module(BlackOil ${PYBIND11_SYSTEM}
 use_warnings(TARGET BlackOil)
 use_fast_build(TARGET BlackOil)
 use_additional_optimization(TARGET BlackOil)
+use_only_needed(TARGET BlackOil)
 
 pybind11_add_module(GasWater ${PYBIND11_SYSTEM}
   $<TARGET_OBJECTS:moduleVersion>
@@ -62,6 +63,7 @@ pybind11_add_module(GasWater ${PYBIND11_SYSTEM}
 use_warnings(TARGET GasWater)
 use_fast_build(TARGET GasWater)
 use_additional_optimization(TARGET GasWater)
+use_only_needed(TARGET GasWater)
 
 pybind11_add_module(OnePhase ${PYBIND11_SYSTEM}
   $<TARGET_OBJECTS:moduleVersion>
@@ -71,6 +73,7 @@ pybind11_add_module(OnePhase ${PYBIND11_SYSTEM}
 use_warnings(TARGET OnePhase)
 use_fast_build(TARGET OnePhase)
 use_additional_optimization(TARGET OnePhase)
+use_only_needed(TARGET OnePhase)
 
 # Create a convenience target to build all Python simulator modules
 add_custom_target(python_simulator_modules