From 96f8b3a43b66cfa749f5d6e95a4af8924e5aae84 Mon Sep 17 00:00:00 2001
From: Louis Gombert <louisgombert@gmail.com>
Date: Sat, 6 Dec 2025 18:52:06 +0100
Subject: [PATCH 1/2] CMake: require Netgen when BUILD_FEM_NETGEN is ON, don't
 fail silently

---
 CMakeLists.txt         | 2 +-
 cMake/FindNETGEN.cmake | 7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8b964c6269..fef81940e4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -94,7 +94,7 @@ if(NOT FREECAD_LIBPACK_USE OR FREECAD_LIBPACK_CHECKFILE_CLBUNDLER OR FREECAD_LIB
     endif(BUILD_GUI)
     SetupSalomeSMESH()
     if (BUILD_FEM_NETGEN)
-        find_package(NETGEN)
+        find_package(NETGEN REQUIRED)
     endif(BUILD_FEM_NETGEN)
     # not needed at the moment
     #find_package(OpenCV REQUIRED)
diff --git a/cMake/FindNETGEN.cmake b/cMake/FindNETGEN.cmake
index 8162adfbd0..23f8f7e5b9 100644
--- a/cMake/FindNETGEN.cmake
+++ b/cMake/FindNETGEN.cmake
@@ -13,7 +13,7 @@
 # See also: http://git.salome-platform.org/gitweb/?p=NETGENPLUGIN_SRC.git;a=summary
 
 
-find_package(Netgen CONFIG)
+find_package(Netgen CONFIG QUIET)
 IF (Netgen_FOUND)
     set(NGLIB_INCLUDE_DIR ${NETGEN_INCLUDE_DIRS})
     set(NGLIB_LIBRARIES nglib)
@@ -147,3 +147,8 @@ IF (Netgen_FOUND)
     MESSAGE(STATUS "Found NETGEN version ${NETGEN_VERSION_MAJOR}.${NETGEN_VERSION_MINOR}, calculated: ${NETGEN_VERSION_C}")
     LIST(APPEND NETGEN_DEFINITIONS -DNETGEN_VERSION=${NETGEN_VERSION_C})
 ENDIF ()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(NETGEN
+    REQUIRED_VARS NGLIB_INCLUDE_DIR NGLIB_LIBRARIES NETGEN_INCLUDE_DIRS 
+    VERSION_VAR NETGEN_VERSION)

From 193a789354ccf649192ac0cf7375949ad5b06667 Mon Sep 17 00:00:00 2001
From: Louis Gombert <louisgombert@gmail.com>
Date: Sun, 7 Dec 2025 11:03:56 +0100
Subject: [PATCH 2/2] CMake: only find Netgen when using internal smesh

---
 CMakeLists.txt         | 7 +++++--
 cMake/FindNETGEN.cmake | 4 ----
 2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fef81940e4..cd72ef0279 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -94,8 +94,11 @@ if(NOT FREECAD_LIBPACK_USE OR FREECAD_LIBPACK_CHECKFILE_CLBUNDLER OR FREECAD_LIB
     endif(BUILD_GUI)
     SetupSalomeSMESH()
     if (BUILD_FEM_NETGEN)
-        find_package(NETGEN REQUIRED)
-    endif(BUILD_FEM_NETGEN)
+        set(NETGEN_DEFINITIONS -DNO_PARALLEL_THREADS -DOCCGEOMETRY)
+        if (NOT FREECAD_USE_EXTERNAL_SMESH)
+            find_package(NETGEN REQUIRED)
+        endif()
+    endif()
     # not needed at the moment
     #find_package(OpenCV REQUIRED)
     SetupSwig()
diff --git a/cMake/FindNETGEN.cmake b/cMake/FindNETGEN.cmake
index 23f8f7e5b9..8a6233e6e0 100644
--- a/cMake/FindNETGEN.cmake
+++ b/cMake/FindNETGEN.cmake
@@ -17,15 +17,11 @@ find_package(Netgen CONFIG QUIET)
 IF (Netgen_FOUND)
     set(NGLIB_INCLUDE_DIR ${NETGEN_INCLUDE_DIRS})
     set(NGLIB_LIBRARIES nglib)
-    set(NETGEN_DEFINITIONS -DNO_PARALLEL_THREADS -DOCCGEOMETRY)
     # for external smesh only the following two variables are needed:
     set(NETGEN_FOUND True)
     set(NETGEN_INCLUDE_DIRS ${NETGEN_INCLUDE_DIRS})
-
 ELSE ()
 
-    SET(NETGEN_DEFINITIONS -DNO_PARALLEL_THREADS -DOCCGEOMETRY)
-
     IF (WIN32)
         FIND_PATH(NGLIB_INCLUDE_DIR NAMES nglib.h PATHS ${NETGEN_INCLUDEDIR})
         SET(NETGEN_LIBS nglib mesh occ interface)