Cmakelists.txt suggestions for multiple components

I was able to get it included by adding this to my CMakeLists at the top level:

set(EXTRA_COMPONENT_DIRS "components/cpp_utils")

and then in the cpp_utils folder, I added this:

# Edit following two lines to set component requirements (see docs)
set(COMPONENT_REQUIRES
  "console"
  "fatfs"
  "json"
  "mdns"
  "nvs_flash"
)
set(COMPONENT_PRIV_REQUIRES )

file(GLOB COMPONENT_SRCS
  LIST_DIRECTORIES false
  "*.h"
  "*.cpp"
  "*.c"
  "*.S"
)
set(COMPONENT_ADD_INCLUDEDIRS ".")

register_component()

My question is, if I have a 2nd Library next to cpp_utils in the components folder, how does it know about cpp_utils. I tried adding it in the COMPONENT_REQUIRES , but that doesn’t seem to work…

thoughts?

[valeros]

Hi @wegunterjr ! Thanks for the report. First thing, you shouldn’t override EXTRA_COMPONENT_DIRS variable as PlatformIO also relies on it so you should append new components to this variable instead. I use the following configuration:

Top level CMakeLists.txt:

cmake_minimum_required(VERSION 3.5)
list(APPEND EXTRA_COMPONENT_DIRS "components/hello" "components/world")
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(hello-world)

CMakeLists.txt for hello component:

idf_component_register(SRCS "hello.c" INCLUDE_DIRS ".")

CMakeLists.txt for world component that depends on hello:

idf_component_register(
  SRCS "world.c"
  INCLUDE_DIRS "."
  PRIV_REQUIRES hello
)

[valeros]

This is my top level folder CMakeLists.txt

SET(EXTRA_COMPONENT_DIRS  "components/cpp_utils")

should be

list(APPEND EXTRA_COMPONENT_DIRS "components/cpp_utils")

and must be placed above the line

include($ENV{IDF_PATH}/tools/cmake/project.cmake)

cmake_minimum_required(VERSION 3.16.0)
list(APPEND EXTRA_COMPONENT_DIRS "components/cpp_utils")
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(connect-esp32)