drop REQUIRED from all find_package

[marakew]

can you please drop it
let rewrite it by CMAKE_DISABLE_FIND_PACKAGE_
thanks

[pdimov]

What specific problem are you having?

[marakew]

i want set manual external library instead use find_package as example set(CMAKE_DISABLE_FIND_PACKAGE_ZLIB 1) set(ZLIB_FOUND 1) add_library(ZLIB::ZLIB UNKNOWN IMPORTED) ...etc but with REQUIRED keyword i got always fail to processing cmake

[pdimov]

Does this refer to a Boost built with b2 or to one built with CMake?

[pdimov]

If with CMake, the config files don't use find_package or REQUIRED; they use find_dependency (e.g. find_dependency(ZLIB). This macro automatically sets QUIET or REQUIRED to match the parent find_package call. So if you call find_package(boost_iostreams REQUIRED), it will invoke find_package(ZLIB REQUIRED), but if you call find_package(boost_iostreams), it will invoke find_package(ZLIB). This is standard CMake behavior.

[pdimov]

Opened a CMake issue about this at https://gitlab.kitware.com/cmake/cmake/-/issues/24293.

[marakew]

you seems dont understand me i don't want use find_package at all i want rewrite it by my own infrastructure with REQUIRED in boost it will impossible my above example will work it REQUIRED will drop from find_package and users will able to rewrite by own env settings without using find_package for searching 2023-01-08 19:57 GMT+02:00, Peter Dimov ***@***.***>:

…

If with CMake, the config files don't use `find_package` or `REQUIRED`; they use `find_dependency` (e.g. `find_dependency(ZLIB)`. This macro automatically sets `QUIET` or `REQUIRED` to match the parent `find_package` call. So if you call `find_package(boost_iostreams REQUIRED)`, it will invoke `find_package(ZLIB REQUIRED)`, but if you call `find_package(boost_iostreams)`, it will invoke `find_package(ZLIB)`. This is standard CMake behavior. -- Reply to this email directly or view it on GitHub: #34 (comment) You are receiving this because you authored the thread. Message ID: ***@***.***>

[pdimov]

So, your complaint is not about find_dependency(ZLIB) in the installed CMake config files, but (for example) about this use of find_package:

https://github.com/boostorg/iostreams/blob/d1c1114a611afb090a007c9ff3e94efbcb914ef3/CMakeLists.txt#L30

[marakew]

yes and all another "required" with may present or will present in boost/cmake infrastructure just remove it to allow users ovewrite by own libs settings 2023-01-09 1:25 GMT+02:00, Peter Dimov ***@***.***>:

…

So, your complaint is not above `find_dependency(ZLIB)` in the installed CMake config files, but (for example) about this use of `find_package`: https://github.com/boostorg/iostreams/blob/d1c1114a611afb090a007c9ff3e94efbcb914ef3/CMakeLists.txt#L30 -- Reply to this email directly or view it on GitHub: #34 (comment) You are receiving this because you authored the thread. Message ID: ***@***.***>

[nigels-com]

There was a change made to boost::iostreams that seems relevant here.