Help! Using MbedTLS as a CMake library in my CMake project

[JeremyTubongbanua]

Summary

Not sure if this is a bug, but I can't get this to work:

set(MbedTLS_DIR ${CMAKE_SOURCE_DIR}/deps/mbedtls/cmake)
find_package(MbedTLS REQUIRED)
target_link_libraries(main PUBLIC MbedTLS::mbedcrypto MbedTLS::mbedtls MbedTLS::mbedx509)
target_include_directories(main PUBLIC ${CMAKE_SOURCE_DIR}/deps/mbedtls/include)

I currently have the mbedtls repo as a git submodule in deps/mbedtls

This is what I run and the error I get:

jeremytubongbanua@Jeremys-M2-Air my_c_sockets % sudo cmake -S . -B build
Password:
CMake Error at CMakeLists.txt:14 (find_package):
  By not providing "FindMbedTLS.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "MbedTLS", but
  CMake did not find one.

  Could not find a package configuration file provided by "MbedTLS" with any
  of the following names:

    MbedTLSConfig.cmake
    mbedtls-config.cmake

  Add the installation prefix of "MbedTLS" to CMAKE_PREFIX_PATH or set
  "MbedTLS_DIR" to a directory containing one of the above files.  If
  "MbedTLS" provides a separate development package or SDK, be sure it has
  been installed.


-- Configuring incomplete, errors occurred!
See also "/Users/jeremytubongbanua/GitHub/my_c_sockets/build/CMakeFiles/CMakeOutput.log".
See also "/Users/jeremytubongbanua/GitHub/my_c_sockets/build/CMakeFiles/CMakeError.log".

Am I doing this right?

System information

Mbed TLS version (number or commit id):
Operating system and version: Mac Sanoma 14.0 - M2 Air (Apple Silicon)
Configuration (if not default, please attach mbedtls_config.h):
Compiler and options (if you used a pre-built binary, please indicate how you obtained it):
Additional environment information:

Expected behavior

Actual behavior

Steps to reproduce

Additional information

My full CMakeLists.txt

cmake_minimum_required(VERSION 3.19)

project(my_c_sockets)

add_executable(main src/main.c)

target_include_directories(main PUBLIC ${CMAKE_SOURCE_DIR}/include)

# add_subdirectory(${CMAKE_SOURCE_DIR}/deps/mbedtls)
# target_include_directories(main PUBLIC ${CMAKE_SOURCE_DIR}/deps/mbedtls/include)
# target_link_libraries(main PUBLIC mbedcrypto mbedtls mbedx509)

set(MbedTLS_DIR ${CMAKE_SOURCE_DIR}/deps/mbedtls/cmake)
find_package(MbedTLS REQUIRED)
target_link_libraries(main PUBLIC MbedTLS::mbedcrypto MbedTLS::mbedtls MbedTLS::mbedx509)
target_include_directories(main PUBLIC ${CMAKE_SOURCE_DIR}/deps/mbedtls/include)

install(
    TARGETS main
    DESTINATION ${CMAKE_SOURCE_DIR}/bin
)

This works, however:

add_subdirectory(${CMAKE_SOURCE_DIR}/deps/mbedtls)
target_include_directories(main PUBLIC ${CMAKE_SOURCE_DIR}/deps/mbedtls/include)
target_link_libraries(main PUBLIC mbedcrypto mbedtls mbedx509)

[paul-elliott-arm]

Hi!

What is your issue with the working version at the end?

We don't currently support the use of find_package(), and this is not something we are currently likely to add, however would welcome a patch that did.

[JeremyTubongbanua]

Hi!

What is your issue with the working version at the end?

We don't currently support the use of find_package(), and this is not something we are currently likely to add, however would welcome a patch that did.

Thank you.. my current solution achieves what I need (using MbedTLS as a dependency in my project).

Just putting this ticket out there in case somebody else is trying to use find_package. It's in the root README but it doesn't work. Would you like a PR removing that documentation @paul-elliott-arm ?

Otherwise, feel free to do what you want with this ticket :)