influence of NO_CMAKE_PACKAGE_REGISTRY on CMake find_package() -


i have following cmakelists.txt :

cmake_minimum_required(version 2.6)  set(cmake_module_path "${cmake_source_dir}/cmake")  find_package(foo quiet no_cmake_package_registry) if (foo_found)   message("foo found") else (foo_found)   message("foo not found") endif (foo_found)  find_package(foo quiet) if (foo_found)   message("foo (2) found") else (foo_found)   message("foo (2) not found") endif (foo_found)

there file ${cmake_source_dir}/cmake/findfoo.cmake. however, when run cmake detects package foo in second case only:

-- (...)   -- detecting cxx compiler abi info                         -- detecting cxx compiler abi info - done foo not found                                         foo (2) found                                      -- configuring done                                             -- generating done                                   -- build files have been written to: /home/me/tmp/build

my understanding of documentation no_cmake_package_registry forbids find_package() @ ~/.cmake/package/foo have nothing here. have same behavior cmake 2.8.9 , cmake 3.5.1.

why find_package() not find file in first case ?

there 2 modes of find_package: first one, simple, searches findfoo.cmake module, second one, more complex, searches fooconfig.cmake config file.

by default, cmake tries both modes, module mode finds file.

but option no_cmake_package_registry applicable config mode, cannot find file in case. same effect caused by

find_package(foo no_module)

-

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