From 05c93077643e0c17a3889cde86446346cb680fa6 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sun, 7 Aug 2022 13:49:27 +0200
Subject: [PATCH] CMake: if module search mode for Coin3D failed try config
 search mode, restore the variable COIN3D_VERSION

---
 cMake/FreeCAD_Helpers/SetupCoin3D.cmake | 27 +++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/cMake/FreeCAD_Helpers/SetupCoin3D.cmake b/cMake/FreeCAD_Helpers/SetupCoin3D.cmake
index 6c7eb07c41..2f4c5c99a8 100644
--- a/cMake/FreeCAD_Helpers/SetupCoin3D.cmake
+++ b/cMake/FreeCAD_Helpers/SetupCoin3D.cmake
@@ -6,13 +6,32 @@ macro(SetupCoin3D)
         find_library(COIN3D_LIBRARIES Coin)
     endif ()
 
-    find_package(Coin3D REQUIRED)
+    # Try MODULE mode
+    find_package(Coin3D)
     if(NOT COIN3D_FOUND)
-        message(FATAL_ERROR "=================\n"
-                            "Coin3D not found.\n"
-                            "=================\n")
+        # Try CONFIG mode
+        find_package(Coin CONFIG REQUIRED)
+        if (Coin_FOUND)
+            set (COIN3D_INCLUDE_DIRS ${Coin_INCLUDE_DIR})
+            set (COIN3D_LIBRARIES ${Coin_LIBRARIES})
+        else()
+            message(FATAL_ERROR "=================\n"
+                                "Coin3D not found.\n"
+                                "=================\n")
+        endif()
     endif(NOT COIN3D_FOUND)
 
+    IF(NOT COIN3D_VERSION)
+      file(READ "${COIN3D_INCLUDE_DIRS}/Inventor/C/basic.h" _coin3d_basic_h)
+      string(REGEX MATCH "define[ \t]+COIN_MAJOR_VERSION[ \t]+([0-9?])" _coin3d_major_version_match "${_coin3d_basic_h}")
+      set(COIN3D_MAJOR_VERSION "${CMAKE_MATCH_1}")
+      string(REGEX MATCH "define[ \t]+COIN_MINOR_VERSION[ \t]+([0-9?])" _coin3d_minor_version_match "${_coin3d_basic_h}")
+      set(COIN3D_MINOR_VERSION "${CMAKE_MATCH_1}")
+      string(REGEX MATCH "define[ \t]+COIN_MICRO_VERSION[ \t]+([0-9?])" _coin3d_micro_version_match "${_coin3d_basic_h}")
+      set(COIN3D_MICRO_VERSION "${CMAKE_MATCH_1}")
+      set(COIN3D_VERSION "${COIN3D_MAJOR_VERSION}.${COIN3D_MINOR_VERSION}.${COIN3D_MICRO_VERSION}")
+    ENDIF()
+
     IF(NOT PIVY_VERSION)
       execute_process (COMMAND ${Python3_EXECUTABLE} -c "import pivy as p; print(p.__version__,end='')" OUTPUT_VARIABLE PIVY_VERSION)
     ENDIF()