InsightSoftwareConsortium · dzenanz · Sep 21, 2026 · Sep 20, 2026 · Sep 20, 2026 · Sep 20, 2026
diff --git a/Modules/ThirdParty/VNL/UpdateFromUpstream.sh b/Modules/ThirdParty/VNL/UpdateFromUpstream.sh
@@ -8,7 +8,7 @@ readonly name='VXL'
 readonly ownership='Insight Software Consortium Maintainers <https://discourse.itk.org/>'
 readonly subtree="Modules/ThirdParty/VNL/src/vxl"
 readonly repo="https://github.com/InsightSoftwareConsortium/vxl.git"
-readonly tag="for/itk-vxl-master-ae2f579" # 2026-07-06 (ae2f579: remove obsolete vcl iterator test)
+readonly tag="for/itk-vxl-master-a0790d7" # 2026-09-20 (a0790d7: remove the unused vcl_where_root_dir mechanism)
 readonly shortlog=false
 readonly exact_tree_match=false
 readonly paths="

diff --git a/Modules/ThirdParty/VNL/src/vxl/core/testlib/CMakeLists.txt b/Modules/ThirdParty/VNL/src/vxl/core/testlib/CMakeLists.txt
@@ -1,15 +1,5 @@
 # ./vxl/testlib/CMakeLists.txt
 
-find_file(TESTLIB_VCL_WHERE_ROOT_DIR_H
-          vcl_where_root_dir.h
-          ${VXL_BINARY_DIR}/vcl )
-
-if(TESTLIB_VCL_WHERE_ROOT_DIR_H)
-  add_compile_definitions(VCL_WHERE_ROOT_DIR_H_EXISTS)
-else()
-  unset(TESTLIB_VCL_WHERE_ROOT_DIR_H)
-endif()
-
 set(testlib_sources
 
   # Useful utilities for the tests
@@ -20,9 +10,6 @@ set(testlib_sources
 
   # The main function of the driver executable
   testlib_main.cxx
-
-  # Used to locate test files in source tree
-  testlib_root_dir.h            testlib_root_dir.cxx
 )
 
 vxl_add_library(LIBRARY_NAME itktestlib

diff --git a/Modules/ThirdParty/VNL/src/vxl/core/testlib/testlib_register.h b/Modules/ThirdParty/VNL/src/vxl/core/testlib/testlib_register.h
@@ -48,7 +48,7 @@ testlib_register_test(const std::string &, TestMainFunction);
 // This allows the main function to be defined in the driver code
 // itself--instead of in the testlib library--thus avoiding
 // "awf-weirdness". This also means that functionality from the test
-// library, such as testlib_root_dir, can be used even if it is not
+// library can be used even if it is not
 // used to create a test driver.
 #define DEFINE_MAIN                        \
   int testlib_main(int, char *[]);         \

diff --git a/Modules/ThirdParty/VNL/src/vxl/core/testlib/testlib_root_dir.cxx b/Modules/ThirdParty/VNL/src/vxl/core/testlib/testlib_root_dir.cxx
diff --git a/Modules/ThirdParty/VNL/src/vxl/core/testlib/testlib_root_dir.h b/Modules/ThirdParty/VNL/src/vxl/core/testlib/testlib_root_dir.h
diff --git a/Modules/ThirdParty/VNL/src/vxl/core/testlib/tests/CMakeLists.txt b/Modules/ThirdParty/VNL/src/vxl/core/testlib/tests/CMakeLists.txt
@@ -6,14 +6,12 @@ add_executable( testlib_test_all
    test_assert.cxx
    test_macros.cxx
    test_args.cxx
-   test_root_dir.cxx
 )
 target_link_libraries( testlib_test_all itktestlib )
 
 add_test( NAME testlib_assert COMMAND testlib_test_all test_assert )
 add_test( NAME testlib_macros COMMAND testlib_test_all test_macros )
 add_test( NAME testlib_args COMMAND testlib_test_all test_args one two )
-add_test( NAME testlib_root_dir COMMAND testlib_test_all test_root_dir )
 add_test( NAME testlib_all COMMAND testlib_test_all all one two )
 
 add_executable( testlib_test_link

diff --git a/Modules/ThirdParty/VNL/src/vxl/core/testlib/tests/test_driver.cxx b/Modules/ThirdParty/VNL/src/vxl/core/testlib/tests/test_driver.cxx
@@ -3,15 +3,13 @@
 DECLARE(test_assert);
 DECLARE(test_macros);
 DECLARE(test_args);
-DECLARE(test_root_dir);
 
 void
 register_tests()
 {
   REGISTER(test_assert);
   REGISTER(test_macros);
   REGISTER(test_args);
-  REGISTER(test_root_dir);
 }
 
 DEFINE_MAIN;
diff --git a/Modules/ThirdParty/VNL/src/vxl/core/testlib/tests/test_include.cxx b/Modules/ThirdParty/VNL/src/vxl/core/testlib/tests/test_include.cxx
@@ -1,5 +1,4 @@
 #include "testlib/testlib_register.h"
-#include "testlib/testlib_root_dir.h"
 #include "testlib/testlib_test.h"
 
 int

diff --git a/Modules/ThirdParty/VNL/src/vxl/core/testlib/tests/test_root_dir.cxx b/Modules/ThirdParty/VNL/src/vxl/core/testlib/tests/test_root_dir.cxx
diff --git a/Modules/ThirdParty/VNL/src/vxl/vcl/CMakeLists.txt b/Modules/ThirdParty/VNL/src/vxl/vcl/CMakeLists.txt
@@ -1,7 +1,7 @@
 # vcl/CMakeLists.txt
 #
-# vcl is header-only: it provides the configured vcl_compiler.h /
-# vcl_where_root_dir.h and the vcl_msvc_warnings.h shim. The "vcl" INTERFACE
+# vcl is header-only: it provides the configured vcl_compiler.h and the
+# vcl_msvc_warnings.h shim. The "vcl" INTERFACE
 # target carries the vcl and core include roots (source and generated) so any
 # target that links it resolves <vcl_compiler.h>, <vxl_config.h> and <vnl/...>
 # without a global include_directories.
@@ -15,7 +15,6 @@ else()
   set(_config_destination ${VXL_INSTALL_INCLUDE_DIR})
 endif()
 vxl_configure_file(${CMAKE_CURRENT_LIST_DIR}/vcl_compiler.h.in ${PROJECT_BINARY_DIR}/vcl_compiler.h ${_config_destination})
-vxl_configure_file(${CMAKE_CURRENT_LIST_DIR}/vcl_where_root_dir.h.in ${PROJECT_BINARY_DIR}/vcl_where_root_dir.h  ${_config_destination})
 
 install(FILES vcl_msvc_warnings.h
     DESTINATION ${_config_destination}

diff --git a/Modules/ThirdParty/VNL/src/vxl/vcl/tests/test_include.cxx b/Modules/ThirdParty/VNL/src/vxl/vcl/tests/test_include.cxx
@@ -50,7 +50,6 @@
 #  include "vcl_msvc_warnings.h"
 #endif
 
-#include <vcl_where_root_dir.h>
 
 int
 main()

diff --git a/Modules/ThirdParty/VNL/src/vxl/vcl/vcl_where_root_dir.h.in b/Modules/ThirdParty/VNL/src/vxl/vcl/vcl_where_root_dir.h.in
-Original file line number
+Diff line change
@@ Expand Up / @@ -50,7 +50,6 @@ @@
     #  include "vcl_msvc_warnings.h"
     #endif
-    #include <vcl_where_root_dir.h>
     int
     main()
@@ Expand Down @@