[Backport MR-8123] vtk_module_build: Ensure external modules build directory are not overwritten

jcfr · mathstuf · jcfr · commit 0ba7af6306aa · 2022-03-08T13:57:40.000-05:00
Co-authored-by: Ben Boeckel &lt;ben.boeckel@kitware.com&gt;
diff --git a/CMake/vtkModule.cmake b/CMake/vtkModule.cmake
@@ -2546,7 +2546,9 @@ function (vtk_module_build)
     # The following logic ensures files are not generated in VTK source for case (3) and (4):
     set(_vtk_build_module_binary_dir "${_vtk_build_module_absolute_binary_dir}")
     if (_vtk_build_module_absolute_source_dir STREQUAL _vtk_build_module_absolute_binary_dir)
-      set(_vtk_build_module_binary_dir "${CMAKE_BINARY_DIR}-external")
+      get_property(_vtk_module_library_name GLOBAL
+        PROPERTY  "_vtk_module_${_vtk_build_module}_library_name")
+      set(_vtk_build_module_binary_dir "${CMAKE_BINARY_DIR}/externals/${_vtk_module_library_name}")
     endif ()
 
     add_subdirectory(
