FindBoost: Refactor debug messages

• Deduplicate code with helper macros
• Remove double printing of _boost_TEST_VERSIONS
• Fix #19158 (closed)
• Add printing of a few additional variables

Example:

build$ cmake -DBoost_DEBUG=ON ..
-- The C compiler identification is GNU 9.1.1
-- The CXX compiler identification is GNU 9.1.1
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1265 ] _boost_TEST_VERSIONS = "1.70.0;1.70;1.69.0;1.69;1.68.0;1.68;1.67.0;1.67;1.66.0;1.66;1.65.1;1.65.0;1.65;1.64.0;1.64;1.63.0;1.63;1.62.0;1.62;1.61.0;1.61;1.60.0;1.60;1.59.0;1.59;1.58.0;1.58;1.57.0;1.57;1.56.0;1.56;1.55.0;1.55;1.54.0;1.54;1.53.0;1.53;1.52.0;1.52;1.51.0;1.51;1.50.0;1.50;1.49.0;1.49;1.48.0;1.48;1.47.0;1.47;1.46.1;1.46.0;1.46;1.45.0;1.45;1.44.0;1.44;1.43.0;1.43;1.42.0;1.42;1.41.0;1.41;1.40.0;1.40;1.39.0;1.39;1.38.0;1.38;1.37.0;1.37;1.36.1;1.36.0;1.36;1.35.1;1.35.0;1.35;1.34.1;1.34.0;1.34;1.33.1;1.33.0;1.33"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1266 ] Boost_USE_MULTITHREADED = "TRUE"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1267 ] Boost_USE_STATIC_LIBS = <unset>
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1268 ] Boost_USE_STATIC_RUNTIME = <unset>
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1269 ] Boost_ADDITIONAL_VERSIONS = <unset>
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1270 ] Boost_NO_SYSTEM_PATHS = <unset>
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1339 ] BOOST_ROOT = <unset>
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1340 ] ENV{BOOST_ROOT} = "/opt/boost-1.68"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1341 ] BOOST_INCLUDEDIR = <unset>
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1342 ] ENV{BOOST_INCLUDEDIR} = "/include"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1343 ] BOOST_LIBRARYDIR = <unset>
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1344 ] ENV{BOOST_LIBRARYDIR} = <unset>
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1416 ] _boost_INCLUDE_SEARCH_DIRS = "/include;/opt/boost-1.68/include;/opt/boost-1.68;PATHS;C:/boost/include;C:/boost;/sw/local/include"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1417 ] _boost_PATH_SUFFIXES = "boost-1_70_0;boost_1_70_0;boost/boost-1_70_0;boost/boost_1_70_0;boost-1_70;boost_1_70;boost/boost-1_70;boost/boost_1_70;boost-1_69_0;boost_1_69_0;boost/boost-1_69_0;boost/boost_1_69_0;boost-1_69;boost_1_69;boost/boost-1_69;boost/boost_1_69;boost-1_68_0;boost_1_68_0;boost/boost-1_68_0;boost/boost_1_68_0;boost-1_68;boost_1_68;boost/boost-1_68;boost/boost_1_68;boost-1_67_0;boost_1_67_0;boost/boost-1_67_0;boost/boost_1_67_0;boost-1_67;boost_1_67;boost/boost-1_67;boost/boost_1_67;boost-1_66_0;boost_1_66_0;boost/boost-1_66_0;boost/boost_1_66_0;boost-1_66;boost_1_66;boost/boost-1_66;boost/boost_1_66;boost-1_65_1;boost_1_65_1;boost/boost-1_65_1;boost/boost_1_65_1;boost-1_65_0;boost_1_65_0;boost/boost-1_65_0;boost/boost_1_65_0;boost-1_65;boost_1_65;boost/boost-1_65;boost/boost_1_65;boost-1_64_0;boost_1_64_0;boost/boost-1_64_0;boost/boost_1_64_0;boost-1_64;boost_1_64;boost/boost-1_64;boost/boost_1_64;boost-1_63_0;boost_1_63_0;boost/boost-1_63_0;boost/boost_1_63_0;boost-1_63;boost_1_63;boost/boost-1_63;boost/boost_1_63;boost-1_62_0;boost_1_62_0;boost/boost-1_62_0;boost/boost_1_62_0;boost-1_62;boost_1_62;boost/boost-1_62;boost/boost_1_62;boost-1_61_0;boost_1_61_0;boost/boost-1_61_0;boost/boost_1_61_0;boost-1_61;boost_1_61;boost/boost-1_61;boost/boost_1_61;boost-1_60_0;boost_1_60_0;boost/boost-1_60_0;boost/boost_1_60_0;boost-1_60;boost_1_60;boost/boost-1_60;boost/boost_1_60;boost-1_59_0;boost_1_59_0;boost/boost-1_59_0;boost/boost_1_59_0;boost-1_59;boost_1_59;boost/boost-1_59;boost/boost_1_59;boost-1_58_0;boost_1_58_0;boost/boost-1_58_0;boost/boost_1_58_0;boost-1_58;boost_1_58;boost/boost-1_58;boost/boost_1_58;boost-1_57_0;boost_1_57_0;boost/boost-1_57_0;boost/boost_1_57_0;boost-1_57;boost_1_57;boost/boost-1_57;boost/boost_1_57;boost-1_56_0;boost_1_56_0;boost/boost-1_56_0;boost/boost_1_56_0;boost-1_56;boost_1_56;boost/boost-1_56;boost/boost_1_56;boost-1_55_0;boost_1_55_0;boost/boost-1_55_0;boost/boost_1_55_0;boost-1_55;boost_1_55;boost/boost-1_55;boost/boost_1_55;boost-1_54_0;boost_1_54_0;boost/boost-1_54_0;boost/boost_1_54_0;boost-1_54;boost_1_54;boost/boost-1_54;boost/boost_1_54;boost-1_53_0;boost_1_53_0;boost/boost-1_53_0;boost/boost_1_53_0;boost-1_53;boost_1_53;boost/boost-1_53;boost/boost_1_53;boost-1_52_0;boost_1_52_0;boost/boost-1_52_0;boost/boost_1_52_0;boost-1_52;boost_1_52;boost/boost-1_52;boost/boost_1_52;boost-1_51_0;boost_1_51_0;boost/boost-1_51_0;boost/boost_1_51_0;boost-1_51;boost_1_51;boost/boost-1_51;boost/boost_1_51;boost-1_50_0;boost_1_50_0;boost/boost-1_50_0;boost/boost_1_50_0;boost-1_50;boost_1_50;boost/boost-1_50;boost/boost_1_50;boost-1_49_0;boost_1_49_0;boost/boost-1_49_0;boost/boost_1_49_0;boost-1_49;boost_1_49;boost/boost-1_49;boost/boost_1_49;boost-1_48_0;boost_1_48_0;boost/boost-1_48_0;boost/boost_1_48_0;boost-1_48;boost_1_48;boost/boost-1_48;boost/boost_1_48;boost-1_47_0;boost_1_47_0;boost/boost-1_47_0;boost/boost_1_47_0;boost-1_47;boost_1_47;boost/boost-1_47;boost/boost_1_47;boost-1_46_1;boost_1_46_1;boost/boost-1_46_1;boost/boost_1_46_1;boost-1_46_0;boost_1_46_0;boost/boost-1_46_0;boost/boost_1_46_0;boost-1_46;boost_1_46;boost/boost-1_46;boost/boost_1_46;boost-1_45_0;boost_1_45_0;boost/boost-1_45_0;boost/boost_1_45_0;boost-1_45;boost_1_45;boost/boost-1_45;boost/boost_1_45;boost-1_44_0;boost_1_44_0;boost/boost-1_44_0;boost/boost_1_44_0;boost-1_44;boost_1_44;boost/boost-1_44;boost/boost_1_44;boost-1_43_0;boost_1_43_0;boost/boost-1_43_0;boost/boost_1_43_0;boost-1_43;boost_1_43;boost/boost-1_43;boost/boost_1_43;boost-1_42_0;boost_1_42_0;boost/boost-1_42_0;boost/boost_1_42_0;boost-1_42;boost_1_42;boost/boost-1_42;boost/boost_1_42;boost-1_41_0;boost_1_41_0;boost/boost-1_41_0;boost/boost_1_41_0;boost-1_41;boost_1_41;boost/boost-1_41;boost/boost_1_41;boost-1_40_0;boost_1_40_0;boost/boost-1_40_0;boost/boost_1_40_0;boost-1_40;boost_1_40;boost/boost-1_40;boost/boost_1_40;boost-1_39_0;boost_1_39_0;boost/boost-1_39_0;boost/boost_1_39_0;boost-1_39;boost_1_39;boost/boost-1_39;boost/boost_1_39;boost-1_38_0;boost_1_38_0;boost/boost-1_38_0;boost/boost_1_38_0;boost-1_38;boost_1_38;boost/boost-1_38;boost/boost_1_38;boost-1_37_0;boost_1_37_0;boost/boost-1_37_0;boost/boost_1_37_0;boost-1_37;boost_1_37;boost/boost-1_37;boost/boost_1_37;boost-1_36_1;boost_1_36_1;boost/boost-1_36_1;boost/boost_1_36_1;boost-1_36_0;boost_1_36_0;boost/boost-1_36_0;boost/boost_1_36_0;boost-1_36;boost_1_36;boost/boost-1_36;boost/boost_1_36;boost-1_35_1;boost_1_35_1;boost/boost-1_35_1;boost/boost_1_35_1;boost-1_35_0;boost_1_35_0;boost/boost-1_35_0;boost/boost_1_35_0;boost-1_35;boost_1_35;boost/boost-1_35;boost/boost_1_35;boost-1_34_1;boost_1_34_1;boost/boost-1_34_1;boost/boost_1_34_1;boost-1_34_0;boost_1_34_0;boost/boost-1_34_0;boost/boost_1_34_0;boost-1_34;boost_1_34;boost/boost-1_34;boost/boost_1_34;boost-1_33_1;boost_1_33_1;boost/boost-1_33_1;boost/boost_1_33_1;boost-1_33_0;boost_1_33_0;boost/boost-1_33_0;boost/boost_1_33_0;boost-1_33;boost_1_33;boost/boost-1_33;boost/boost_1_33"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1432 ] location of version.hpp: /usr/include/boost/version.hpp
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1472 ] Boost_VERSION = "106900"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1473 ] Boost_VERSION_STRING = "1.69.0"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1474 ] Boost_VERSION_MACRO = "106900"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1475 ] Boost_VERSION_MAJOR = "1"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1476 ] Boost_VERSION_MINOR = "69"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1477 ] Boost_VERSION_PATCH = "0"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1478 ] Boost_VERSION_COUNT = "3"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1495 ] Boost_LIB_PREFIX = ""
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1496 ] Boost_NAMESPACE = "boost"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:614 ] _boost_COMPILER = "-gcc9" (guessed)
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1532 ] _boost_MULTITHREADED = "-mt"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1609 ] _boost_ARCHITECTURE_TAG = "" (detected)
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1613 ] _boost_RELEASE_ABI_TAG = "-"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1614 ] _boost_DEBUG_ABI_TAG = "-d"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1674 ] _boost_LIBRARY_SEARCH_DIRS_RELEASE = "/opt/boost-1.68/lib;/opt/boost-1.68/stage/lib;/usr/include/lib;/usr/include/../lib;/usr/include/stage/lib;PATHS;C:/boost/lib;C:/boost;/sw/local/lib"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1675 ] _boost_LIBRARY_SEARCH_DIRS_DEBUG = "/opt/boost-1.68/lib;/opt/boost-1.68/stage/lib;/usr/include/lib;/usr/include/../lib;/usr/include/stage/lib;PATHS;C:/boost/lib;C:/boost;/sw/local/lib"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1859 ] Searching for SYSTEM_LIBRARY_RELEASE: boost_system-gcc9-mt-1_69;boost_system-gcc9-mt;boost_system-gcc9-mt;boost_system-mt-1_69;boost_system-mt;boost_system-mt;boost_system-mt;boost_system
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:473 ] Boost_LIBRARY_DIR_RELEASE = "/usr/lib64"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:475 ] _boost_LIBRARY_SEARCH_DIRS_RELEASE = "/usr/lib64;NO_DEFAULT_PATH;NO_CMAKE_FIND_ROOT_PATH"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:1914 ] Searching for SYSTEM_LIBRARY_DEBUG: boost_system-gcc9-mt-d-1_69;boost_system-gcc9-mt-d;boost_system-gcc9-mt-d;boost_system-mt-d-1_69;boost_system-mt-d;boost_system-mt-d;boost_system-mt;boost_system
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:473 ] Boost_LIBRARY_DIR_DEBUG = "/usr/lib64"
-- [ /home/dklein/projects/cmake/cmake-build/install/share/cmake-3.14/Modules/FindBoost.cmake:475 ] _boost_LIBRARY_SEARCH_DIRS_DEBUG = "/usr/lib64;NO_DEFAULT_PATH;NO_CMAKE_FIND_ROOT_PATH"
-- Found Boost: /usr/include (found version "1.69.0") found components:  system
-- Configuring done
-- Generating done
-- Build files have been written to: /home/dklein/projects/naked_cmake/build

Topic-rename: FindBoost-debug-messages