find_package for CMake

[jmafc]

Is your feature request related to a problem? Please describe.
The suggested approach of using FetchContent to include cpr causes it (and everything else) to be checked and rebuilt (including all of curl and its tests) any time I tweak my CMakeLists.txt (which I've been doing rather frequently because I'm migrating other programs--and only two of which use cpr and those are essentially done).

Describe the solution you'd like
A find_package alternative to the FetchContent suggestion.

Describe alternatives you've considered
I built cpr locally and installed it to /usr/local/lib and added find_package to my CMakeLists.txt. However, cmake complained about not being able to find cprConfig.cmake or cpr-config.cmake. Since the latter file exists in your root directory, I copied it manually to /usr/local/lib/cmake/CPR. However, cmake now complains:

CMake Error at /usr/share/cmake-3.18/Modules/FindPackageHandleStandardArgs.cmake:165 (message):
  Could NOT find CPR (missing: CPR_INCLUDE_DIR)
Call Stack (most recent call first):
  /usr/share/cmake-3.18/Modules/FindPackageHandleStandardArgs.cmake:458 (_FPHSA_FAILURE_MESSAGE)
  /usr/local/lib/cmake/CPR/cpr-config.cmake:21 (find_package_handle_standard_args)

So what I'm really asking is that the work that was started when that cpr-config.cmake was created be completed so that find_package can be used.

Additional context
Using cpr 1.9.0 on Debian 11.

[jmafc]

Looking a little closer, I see that #645 was a PR that attempted to fix this problem and that created the file cmake/cprConfig.cmake.in (so the older cpr-config.cmake can probably be removed). It also modified the cpr/CMakeLists.txt to create the cprTargets.cmake needed by the .in file. However, I cannot find the cprTargets.cmake file in build directory tree after doing a cmake --build .. So, instead of being a "feature request", this ought to be considered a bug.

[KingKili]

In order for the CPR config to be installed, you must use the libcurl of your system (CPR_FORCE_USE_SYSTEM_CURL). Then it should all work as requested after a make install.

[jmafc]

OK, tested and that does work. However, that fact and the procedure for using Cmake find_package s perhaps should be mentioned in the main README?

[COM8]

@jmafc Would you like to create a PR for this?

[jmafc]

Not at this time. Sorry. You may close the issue if you want.