Running libdatachannel over esp32 board - c

Question

I am using esp idf to develop my project. I downloaded libdatachannel in esp folder so now I have 2 directories in esp folder:
esp-idf
libdatachannel
I then updated CMakeLists.txt in the root of my project and added line
set(EXTRA_COMPONENT_DIRS "$ENV{IDF_PATH}/examples/common_components/protocol_examples_common $ENV{IDF_PATH}/../libdatachannel")
now when I try to build the project I get following callstack
Executing task: ninja
[0/1] Re-running CMake...
-- Project is not inside a git repository, or git repository has no commits; will not use 'git describe' to determine PROJECT_VER.
-- Building ESP-IDF components for target esp32 CMake Error at /Users/ayaz/esp/esp-idf/tools/cmake/component.cmake:219 (message):
CMake Warning (dev) at build_properties.temp.cmake:7:
Syntax Warning in cmake code at column 51
Argument not separated from preceding token by whitespace.
Call Stack (most recent call first):
/Users/ayaz/esp/esp-idf/tools/cmake/scripts/component_get_requirements.cmake:3
(include)
This warning is for project developers. Use -Wno-dev to suppress
it.
fatal: not a git repository (or any parent up to mount point
/Volumes)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not
set).
CMake Error at /Users/ayaz/esp/libdatachannel/CMakeLists.txt:2
(project):
project command is not scriptable
Call Stack (most recent call first):
/Users/ayaz/esp/esp-idf/tools/cmake/scripts/component_get_requirements.cmake:106
(include)
/Users/ayaz/esp/esp-idf/tools/cmake/scripts/component_get_requirements.cmake:124
(__component_get_requirements)
Call Stack (most recent call first):
/Users/ayaz/esp/esp-idf/tools/cmake/build.cmake:491
(__component_get_requirements)
/Users/ayaz/esp/esp-idf/tools/cmake/project.cmake:378
(idf_build_process) CMakeLists.txt:10 (project)
-- Configuring incomplete, errors occurred! See also "/Volumes/Projects/ESP-Projects/websocket/build/CMakeFiles/CMakeOutput.log".
FAILED: build.ninja
/Users/ayaz/.espressif/tools/cmake/3.20.3/CMake.app/Contents/bin/cmake
--regenerate-during-build -S/Volumes/Projects/ESP-Projects/websocket -B/Volumes/Projects/ESP-Projects/websocket/build ninja: error: rebuilding 'build.ninja': subcommand failed
The terminal process "/bin/zsh '-c', 'ninja '" terminated with
exit code: 1.
PROGRESS SO FAR:
I am having following error while building toolchain
Compiling the CXX compiler identification source file
"CMakeCXXCompilerId.cpp" failed. Compiler:
/Volumes/Extra/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
Build flags: Id flags:
The output was: 1 ld: library not found for -lc++ clang: error: linker
command failed with exit code 1 (use -v to see invocation)
Compiling the C compiler identification source file
"CMakeCCompilerId.c" failed. Compiler:
/Volumes/Extra/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
Build flags: Id flags:
The output was: 1 ld: library not found for -lSystem clang: error:
linker command failed with exit code 1 (use -v to see invocation)
another problem is that esp32 uses xtensa-esp32-elf- compiler where as libdatachannel is getting compiled using Apple Clang. I need to modify sdkconfig so that all includes gets compiled using xtensa-esp32-elf-
# The following four lines of boilerplate have to be in your project's CMakeLists
# in this exact order for cmake to work correctly
cmake_minimum_required(VERSION 3.5)
# (Not part of the boilerplate)
# This example uses an extra component for common functions such as Wi-Fi and Ethernet connection.
set(EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/common_components/protocol_examples_common)
include($ENV{IDF_PATH}/../libdatachannel/CMakeLists.txt)
include($ENV{ADF_PATH}/CMakeLists.txt)
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(websocket_example)