I’ve installed esp-idf and I’m trying to compile example build_system/cmake/idf_as_lib
and I got the error in the ESP-IDF CMD which not allow me to compile that example. The same problem is in Visual Studio Code.
Probably I should set environment path CMAKE_C_COMPILER but I don’t know what should I point.
I’ve installed CMAKE on my windows
My actual environment paths:
IDF_PYTHON_ENV_PATH → C:\esp\tools.espressif\python_env\idf4.4_py3.8_env\Scripts\python.exe
IDF_TOOLS_PATH → C:\esp\tools.espressif
IDF_PATH → C:\esp\esp-idf
C:\esp\esp-idf\examples\build_system\cmake\idf_as_lib>idf.py build
Executing action: all (aliases: build)
Running cmake in directory c:\esp\esp-idf\examples\build_system\cmake\idf_as_lib\build
Executing "cmake -G Ninja -DPYTHON_DEPS_CHECKED=1 -DESP_PLATFORM=1 -DCCACHE_ENABLE=1 c:\esp\esp-idf\examples\build_system\cmake\idf_as_lib"...
-- The C compiler identification is unknown
CMake Error at CMakeLists.txt:3 (project):
No CMAKE_C_COMPILER could be found.
Tell CMake where to find the compiler by setting either the environment
variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to
the compiler, or to the compiler name if it is in the PATH.
-- Configuring incomplete, errors occurred!
See also "C:/esp/esp-idf/examples/build_system/cmake/idf_as_lib/build/CMakeFiles/CMakeOutput.log".
See also "C:/esp/esp-idf/examples/build_system/cmake/idf_as_lib/build/CMakeFiles/CMakeError.log".
cmake failed with exit code 1
CMakeList
project(idf_as_lib C)
if("${TARGET}" STREQUAL "esp32")
# Include for ESP-IDF build system functions
include($ENV{IDF_PATH}/tools/cmake/idf.cmake)
# Create idf::esp32 and idf::freertos static libraries
idf_build_process(esp32
# try and trim the build; additional components
# will be included as needed based on dependency tree
#
# although esptool_py does not generate static library,
# processing the component is needed for flashing related
# targets and file generation
COMPONENTS esp32 freertos esptool_py
SDKCONFIG ${CMAKE_CURRENT_LIST_DIR}/sdkconfig
BUILD_DIR ${CMAKE_BINARY_DIR})
else()
# Create stubs for esp32 and freertos, stub::esp32 and stub::freertos
add_subdirectory(stubs/esp32)
add_subdirectory(stubs/freertos)
add_subdirectory(stubs/spi_flash)
endif()
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
set(elf_file ${CMAKE_PROJECT_NAME}.elf)
add_executable(${elf_file} main.c)
# Link the static libraries to the executable
if("${TARGET}" STREQUAL "esp32")
target_link_libraries(${elf_file} idf::esp32 idf::freertos idf::spi_flash)
# Attach additional targets to the executable file for flashing,
# linker script generation, partition_table generation, etc.
idf_build_executable(${elf_file})
else()
target_link_libraries(${elf_file} stub::esp32 stub::freertos stub::spi_flash)
endif()