boost-1.69 headers for gil break builds on boost >= 1.72

[lychaxo]

Boost 1.72 moved aspects of convolve.hpp and other gil numeric extensions behind a detail:: subnamespace (https://gist.github.com/mloskot/993e3d3b471a7e3c02e5ac8199d2b4ad -> boostorg/gil@8235ee6). The randomly included chunk of gil headers causes a compile-time conflict for k3dsdk/bitmap.h resulting in numerous errors relating to convolve_*, kernel_*, and generate_dy_sobel:

In file included from /usr/include/boost/gil/image_processing/numeric.hpp:15,
                 from /usr/include/boost/gil/image_processing/scaling.hpp:14,
                 from /usr/include/boost/gil.hpp:46,
                 from /tmp/SBo/k3d-k3d-0.8.0.6/k3dsdk/bitmap.h:36,
                 from /tmp/SBo/k3d-k3d-0.8.0.6/k3dsdk/type_registry.cpp:24:
/usr/include/boost/gil/detail/math.hpp:24:16: error: ‘kernel_2d’ in namespace ‘boost::gil::detail’ does not name a template type
   24 | inline detail::kernel_2d<T, Allocator> get_identity_kernel()
      |                ^~~~~~~~~

...

  292 |     auto sobel_y = generate_dy_sobel();
      |                    ^~~~~~~~~~~~~~~~~
/usr/include/boost/gil/image_processing/numeric.hpp:293:13: error: ‘convolve_2d’ is not a member of ‘boost::gil::detail’
  293 |     detail::convolve_2d(dx, sobel_x, ddxx);

Removing the included headers in k3dsdk/gil/boost/gil/extension/numeric resolves the issue. I at first tried just removing convolve.hpp (fixes some errors), kernel.hpp (fixes some errors), but then trying to remove pixel_numeric_operations.hpp did not fix the errors related to various pixel_*_t types which started appearing after removing the other two headers, so I just tried removing them all -- this worked. If there is a need to include these in the source distribution for older boost builds, then perhaps CMake is incorrectly adding them to my g++ command line?

CMake on my system causes each source file to be built with a command like:

cd /tmp/SBo/k3d-17ef1bf060ea2d0c88f601f519b8ffdecd341de9/k3d-build/... && /usr/bin/c++  -DBOOST_ALL_NO_LIB -DBOOST_PROGRAM_OPTIONS_DYN_LINK -DBOOST_SYSTEM_DYN_LINK -DBOOST_UNIT_TEST_FRAMEWORK_DYN_LINK -DK3D_HAVE_EXPAT -DK3D_HAVE_SIGC_2_0 -Dk3dsdk_EXPORTS  -I/tmp/SBo/k3d-17ef1bf060ea2d0c88f601f519b8ffdecd341de9 -I/tmp/SBo/k3d-17ef1bf060ea2d0c88f601f519b8ffdecd341de9/k3d-build/k3dsdk -I/tmp/SBo/k3d-17ef1bf060ea2d0c88f601f519b8ffdecd341de9/k3dsdk/gil -I/usr/include/glibmm-2.4 -I/usr/lib64/glibmm-2.4/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/sigc++-2.0 -I/usr/lib64/sigc++-2.0/include  -O2 -fPIC -Wno-deprecated-declarations -O3 -DNDEBUG -std=gnu++11 -o CMakeFiles/... -c ...

Output of grep -B1 -i 'gil\|boost' CMakeCache.txt:

Boost_DATE_TIME_LIBRARY_RELEASE:STRING=/usr/lib64/libboost_date_time.so.1.74.0

//The directory containing a CMake configuration file for Boost.
Boost_DIR:PATH=/usr/lib64/cmake/Boost-1.74.0
--
//Path to a file.
Boost_INCLUDE_DIR:PATH=/usr/include

Boost_PROGRAM_OPTIONS_LIBRARY_RELEASE:STRING=/usr/lib64/libboost_program_options.so.1.74.0

Boost_PYTHON_LIBRARY_RELEASE:STRING=/usr/lib64/libboost_python27.so.1.74.0

Boost_REGEX_LIBRARY_RELEASE:STRING=/usr/lib64/libboost_regex.so.1.74.0

Boost_SYSTEM_LIBRARY_RELEASE:STRING=/usr/lib64/libboost_system.so.1.74.0

Boost_UNIT_TEST_FRAMEWORK_LIBRARY_RELEASE:STRING=/usr/lib64/libboost_unit_test_framework.so.1.74.0
--

//Override the default location for Boost header files.
K3D_BOOST_INCLUDE_DIR:PATH=

//Override the default location for Boost libraries.
K3D_BOOST_LIBRARY_DIR:PATH=

//Use multithreaded Boost libraries.
K3D_BOOST_USE_MULTITHREADED:BOOL=OFF
--

//The directory containing a CMake configuration file for boost_date_time.
boost_date_time_DIR:PATH=/usr/lib64/cmake/boost_date_time-1.74.0

//The directory containing a CMake configuration file for boost_headers.
boost_headers_DIR:PATH=/usr/lib64/cmake/boost_headers-1.74.0

//The directory containing a CMake configuration file for boost_program_options.
boost_program_options_DIR:PATH=/usr/lib64/cmake/boost_program_options-1.74.0

//The directory containing a CMake configuration file for boost_python.
boost_python_DIR:PATH=/usr/lib64/cmake/boost_python-1.74.0

//The directory containing a CMake configuration file for boost_regex.
boost_regex_DIR:PATH=/usr/lib64/cmake/boost_regex-1.74.0

//The directory containing a CMake configuration file for boost_system.
boost_system_DIR:PATH=/usr/lib64/cmake/boost_system-1.74.0

//The directory containing a CMake configuration file for boost_unit_test_framework.
boost_unit_test_framework_DIR:PATH=/usr/lib64/cmake/boost_unit_test_framework-1.74.0
--
//Dependencies for the target
k3d-scripted-plugins_LIB_DEPENDS:STATIC=general;k3dsdk;general;Boost::regex;
--
//Dependencies for the target
k3dsdk-python-arrays_LIB_DEPENDS:STATIC=general;k3dsdk;general;/usr/lib64/libpython2.7.so;general;Boost::python;
--
//Dependencies for the target
k3dsdk-python-atk_LIB_DEPENDS:STATIC=general;k3dsdk;general;Boost::python;general;/usr/lib64/libpython2.7.so;general;gtkmm-2.4;general;atkmm-1.6;general;gtk-x11-2.0;general;gdkmm-2.4;general;giomm-2.4;general;pangomm-1.4;general;glibmm-2.4;general;cairomm-1.0;general;sigc-2.0;general;gtk-x11-2.0;general;gdk-x11-2.0;general;pangocairo-1.0;general;atk-1.0;general;cairo;general;gdk_pixbuf-2.0;general;gio-2.0;general;pangoft2-1.0;general;pango-1.0;general;gobject-2.0;general;glib-2.0;general;fontconfig;general;freetype;
--
//Dependencies for the target
k3dsdk-python-const-arrays_LIB_DEPENDS:STATIC=general;k3dsdk;general;/usr/lib64/libpython2.7.so;general;Boost::python;
--
//Dependencies for the target
k3dsdk-python-values_LIB_DEPENDS:STATIC=general;k3dsdk;general;Boost::python;general;/usr/lib64/libpython2.7.so;
--
//Dependencies for the target
k3dsdk-python_LIB_DEPENDS:STATIC=general;k3dsdk-python-primitives;general;Boost::python;general;k3dsdk-python-atk;
--
//Dependencies for the target
k3dsdk_LIB_DEPENDS:STATIC=general;glibmm-2.4;general;gobject-2.0;general;glib-2.0;general;sigc-2.0;general;sigc-2.0;general;/usr/lib64/libexpat.so;general;/usr/lib64/libz.so;general;GLEW;general;GL;general;X11;general;GLU;general;GL;general;/usr/lib64/libGL.so;general;/usr/lib64/libGLU.so;general;k3dsdk-half;general;k3dsdk-sgi-tesselator;general;k3dsdk-parallel;general;Boost::program_options;general;Boost::unit_test_framework;general;Boost::system;general;dl;
--
BUILD_TESTING:INTERNAL=OFF
//ADVANCED property for variable: Boost_DIR
Boost_DIR-ADVANCED:INTERNAL=1
--
EXPAT_LIBRARY-ADVANCED:INTERNAL=1
//Details about finding Boost
FIND_PACKAGE_MESSAGE_DETAILS_Boost:INTERNAL=[/usr/lib64/cmake/Boost-1.74.0/BoostConfig.cmake][cfound components: date_time program_options regex system unit_test_framework python ][v1.74.0(1.42)]
--
K3D_BLAS_LIBRARY-ADVANCED:INTERNAL=1
//ADVANCED property for variable: K3D_BOOST_INCLUDE_DIR
K3D_BOOST_INCLUDE_DIR-ADVANCED:INTERNAL=1
//ADVANCED property for variable: K3D_BOOST_LIBRARY_DIR
K3D_BOOST_LIBRARY_DIR-ADVANCED:INTERNAL=1
//ADVANCED property for variable: K3D_BOOST_USE_MULTITHREADED
K3D_BOOST_USE_MULTITHREADED-ADVANCED:INTERNAL=1
--
__pkg_config_checked_PC_Magick++:INTERNAL=1
//ADVANCED property for variable: boost_date_time_DIR
boost_date_time_DIR-ADVANCED:INTERNAL=1
//ADVANCED property for variable: boost_headers_DIR
boost_headers_DIR-ADVANCED:INTERNAL=1
//ADVANCED property for variable: boost_program_options_DIR
boost_program_options_DIR-ADVANCED:INTERNAL=1
//ADVANCED property for variable: boost_python_DIR
boost_python_DIR-ADVANCED:INTERNAL=1
//ADVANCED property for variable: boost_regex_DIR
boost_regex_DIR-ADVANCED:INTERNAL=1
//ADVANCED property for variable: boost_system_DIR
boost_system_DIR-ADVANCED:INTERNAL=1
//ADVANCED property for variable: boost_unit_test_framework_DIR
boost_unit_test_framework_DIR-ADVANCED:INTERNAL=1

Observed in latest commit ID 17ef1bf but the same gil headers are present in latest release 0.8.0.6 as well, so I suspect the problem would also occur there.