Build of Hello_World.c fails for target devices ESP32H2, ESP32C6

[brunofr]

Hi,
I tried to build the Hello_World.c example shipped with ESP-IDF but it fails with the below messages when I set the target to ESP32H2 or ESP32C6.
Surprisingly the build runs fine when the target is set to ESP32.

C:/Users/Bruno/Documents/Visual_Studio_Code/ESP-IDF/v5.2/espressif/tools/riscv32-esp-elf/esp-13.2.0_20230928/riscv32-esp-elf/riscv32-esp-elf/include/c++/13.2.0/cstdlib:41:10: fatal error: bits/c++config.h: No such file or directory
41 | #include <bits/c++config.h>

The environment is :
OS - Windows 10
Visual Studio Code version 1.86.0
ESP-IDF Extension version 1.7.0
Git version 2.39.2.windows.1
ESP-IDF version 5.2.0
Python version 3.11.2
Python's pip version 23.3.2

I found hits in the net mainly related to the Arduino env or to problem with the long path names not allowed in Windows.

Still the file c++config.h does not exist in the bits subdir.
Is this file missing in this version of ESP-IDF (no issue reported during the install) or is there a workaround I could try ?
Thanks.

[ESP_bignacio]

Where are you seeing the error ? Is the error coming from the Microsoft C/C++ extension ? or is it in the build output ?

You can check the .vscode/c_cpp_properties.json and use the compile_commands.json configuration as described in https://github.com/espressif/vscode-esp ... URATION.md

[brunofr]

The error messages are in the terminal during the build in the ESP-IDF, not sure what you mean by Microsoft C/C++ extension.

Since I have reinstalled VSCode and the ESP-IDF extension from scratch with ESP IDF 5.1.2 stable.
I run with the c_cpp_properties.json unmodified after the install. Hard coding the compilerPath did not help.

Code: Select all

{
    "configurations": [
        {
            "name": "ESP-IDF",
            "compilerPath": "${config:idf.toolsPathWin}undefined",
            "compileCommands": "${workspaceFolder}/build/compile_commands.json",
            "includePath": [
                "${config:idf.espIdfPath}/components/**",
                "${config:idf.espIdfPathWin}/components/**",
                "${config:idf.espAdfPath}/components/**",
                "${config:idf.espAdfPathWin}/components/**",
                "${workspaceFolder}/**"
            ],
            "browse": {
                "path": [
                    "${config:idf.espIdfPath}/components",
                    "${config:idf.espIdfPathWin}/components",
                    "${config:idf.espAdfPath}/components/**",
                    "${config:idf.espAdfPathWin}/components/**",
                    "${workspaceFolder}"
                ],
                "limitSymbolsToIncludedHeaders": false
            }
        }
    ],
    "version": 4
}

The C code used is now reduced to the bare minimum :

Code: Select all

#include <stdio.h>
void app_main(void)
{
}

I see the same problem where builds for Xtensa ESP32 modules work (using xtensa-esp32-elf-gcc.exe) while builds for RISC-V ESP32 modules fail (using riscv32-esp-elf-g++.exe) with the same errors.
Below the error messages for a build done with target set to ESP32H2:

Code: Select all

 Successfully created esp32h2 image.
Generated C:/Users/Bruno/VSCode/Projects/Espressif/v5.1.2/Test/build/bootloader/bootloader.bin
[105/105] cmd.exe /C "cd /D C:\Users\Bruno\VSCode\Projects\Espressif\v5.1.2\Test\build\bootloader\esp-idf\esptool_py && C:\Users\Bruno\VSCode\ESP-IDF\v5.1.2\.espressif\python_env\idf5.1_py3.11_env\Scripts\python.exe C:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/partition_table/check_sizes.py --offset 0x8000 bootloader 0x0 
C:/Users/Bruno/VSCode/Projects/Espressif/v5.1.2/Test/build/bootloader/bootloader.bin"
Bootloader binary size 0x5240 bytes. 0x2dc0 bytes (36%) free.
[391/909] Building CXX object esp-idf/cxx/CMakeFiles/__idf_cxx.dir/cxx_guards.cpp.obj
FAILED: esp-idf/cxx/CMakeFiles/__idf_cxx.dir/cxx_guards.cpp.obj 
C:\Users\Bruno\VSCode\ESP-IDF\v5.1.2\.espressif\tools\riscv32-esp-elf\esp-12.2.0_20230208\riscv32-esp-elf\bin\riscv32-esp-elf-g++.exe -DESP_PLATFORM -DIDF_VER=\"v5.1.2\" -DSOC_MMU_PAGE_SIZE=CONFIG_MMU_PAGE_SIZE -D_GNU_SOURCE -D_POSIX_READER_WRITER_LOCKS -IC:/Users/Bruno/VSCode/Projects/Espressif/v5.1.2/Test/build/config -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/newlib/platform_include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/freertos/FreeRTOS-Kernel/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/freertos/FreeRTOS-Kernel/portable/riscv/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/freertos/esp_additions/include/freertos -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/freertos/esp_additions/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/freertos/esp_additions/arch/riscv/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_hw_support/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_hw_support/include/soc -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_hw_support/include/soc/esp32h2 -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_hw_support/port/esp32h2/. -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_hw_support/port/esp32h2/private_include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/heap/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/log/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/soc/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/soc/esp32h2 -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/soc/esp32h2/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/hal/esp32h2/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/hal/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/hal/platform_port/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_rom/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_rom/include/esp32h2 -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_rom/esp32h2 -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_common/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_system/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_system/port/soc -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_system/port/include/riscv -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_system/port/include/private -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/riscv/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/include/apps -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/include/apps/sntp -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/lwip/src/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/port/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/port/freertos/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/port/esp32xx/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/port/esp32xx/include/arch -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/pthread/include -march=rv32imac_zicsr_zifencei  -fdiagnostics-color=always -ffunction-sections -fdata-sections -Wall -Werror=all -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=unused-but-set-variable -Wno-error=deprecated-declarations -Wextra -Wno-unused-parameter -Wno-sign-compare -Wno-enum-conversion -gdwarf-4 -ggdb -nostartfiles -Og -fmacro-prefix-map=C:/Users/Bruno/VSCode/Projects/Espressif/v5.1.2/Test=. -fmacro-prefix-map=C:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf=/IDF -fstrict-volatile-bitfields -fno-jump-tables -fno-tree-switch-conversion -DconfigENABLE_FREERTOS_DEBUG_OCDAWARE=1 -std=gnu++2b -fno-exceptions -fno-rtti -MD -MT esp-idf/cxx/CMakeFiles/__idf_cxx.dir/cxx_guards.cpp.obj -MF esp-idf\cxx\CMakeFiles\__idf_cxx.dir\cxx_guards.cpp.obj.d -o esp-idf/cxx/CMakeFiles/__idf_cxx.dir/cxx_guards.cpp.obj -c C:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/cxx/cxx_guards.cpp
In file included from c:\users\bruno\vscode\esp-idf\v5.1.2\.espressif\tools\riscv32-esp-elf\esp-12.2.0_20230208\riscv32-esp-elf\riscv32-esp-elf\include\c++\12.2.0\stdlib.h:36,
                 from C:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/cxx/cxx_guards.cpp:7:
c:\users\bruno\vscode\esp-idf\v5.1.2\.espressif\tools\riscv32-esp-elf\esp-12.2.0_20230208\riscv32-esp-elf\riscv32-esp-elf\include\c++\12.2.0\cstdlib:41:10: fatal error: bits/c++config.h: No such file or directory
   41 | #include <bits/c++config.h>
      |          ^~~~~~~~~~~~~~~~~~
compilation terminated.
[393/909] Building CXX object esp-idf/cxx/CMakeFiles/__idf_cxx.dir/cxx_exception_stubs.cpp.obj
FAILED: esp-idf/cxx/CMakeFiles/__idf_cxx.dir/cxx_exception_stubs.cpp.obj
C:\Users\Bruno\VSCode\ESP-IDF\v5.1.2\.espressif\tools\riscv32-esp-elf\esp-12.2.0_20230208\riscv32-esp-elf\bin\riscv32-esp-elf-g++.exe -DESP_PLATFORM -DIDF_VER=\"v5.1.2\" -DSOC_MMU_PAGE_SIZE=CONFIG_MMU_PAGE_SIZE -D_GNU_SOURCE -D_POSIX_READER_WRITER_LOCKS -IC:/Users/Bruno/VSCode/Projects/Espressif/v5.1.2/Test/build/config -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/newlib/platform_include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/freertos/FreeRTOS-Kernel/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/freertos/FreeRTOS-Kernel/portable/riscv/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/freertos/esp_additions/include/freertos -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/freertos/esp_additions/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/freertos/esp_additions/arch/riscv/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_hw_support/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_hw_support/include/soc -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_hw_support/include/soc/esp32h2 -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_hw_support/port/esp32h2/. -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_hw_support/port/esp32h2/private_include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/heap/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/log/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/soc/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/soc/esp32h2 -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/soc/esp32h2/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/hal/esp32h2/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/hal/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/hal/platform_port/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_rom/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_rom/include/esp32h2 -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_rom/esp32h2 -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_common/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_system/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_system/port/soc -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_system/port/include/riscv -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/esp_system/port/include/private -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/riscv/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/include/apps -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/include/apps/sntp -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/lwip/src/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/port/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/port/freertos/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/port/esp32xx/include -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/lwip/port/esp32xx/include/arch -IC:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/pthread/include -march=rv32imac_zicsr_zifencei  -fdiagnostics-color=always -ffunction-sections -fdata-sections -Wall -Werror=all -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=unused-but-set-variable -Wno-error=deprecated-declarations -Wextra -Wno-unused-parameter -Wno-sign-compare -Wno-enum-conversion -gdwarf-4 -ggdb -nostartfiles -Og -fmacro-prefix-map=C:/Users/Bruno/VSCode/Projects/Espressif/v5.1.2/Test=. -fmacro-prefix-map=C:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf=/IDF -fstrict-volatile-bitfields -fno-jump-tables -fno-tree-switch-conversion -DconfigENABLE_FREERTOS_DEBUG_OCDAWARE=1 -std=gnu++2b -fno-exceptions -fno-rtti -MD -MT esp-idf/cxx/CMakeFiles/__idf_cxx.dir/cxx_exception_stubs.cpp.obj -MF esp-idf\cxx\CMakeFiles\__idf_cxx.dir\cxx_exception_stubs.cpp.obj.d -o esp-idf/cxx/CMakeFiles/__idf_cxx.dir/cxx_exception_stubs.cpp.obj -c C:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/cxx/cxx_exception_stubs.cpp
In file included from C:/Users/Bruno/VSCode/ESP-IDF/v5.1.2/esp-idf/components/cxx/cxx_exception_stubs.cpp:6:
c:\users\bruno\vscode\esp-idf\v5.1.2\.espressif\tools\riscv32-esp-elf\esp-12.2.0_20230208\riscv32-esp-elf\riscv32-esp-elf\include\c++\12.2.0\cstdlib:41:10: fatal error: bits/c++config.h: No such file or directory
   41 | #include <bits/c++config.h>
      |          ^~~~~~~~~~~~~~~~~~
compilation terminated.
[396/909] Building C object esp-idf/newlib/CMakeFiles/__idf_newlib.dir/time.c.obj
ninja: build stopped: subcommand failed.

There is no file c++config.h in the ...\include\c++\12.2.0\bits in the directories but the compile_commands.json file always contains build commands for cxx_guards.cpp and cxx_exception_stubs.cpp for both ESP32 architectures.
As expected I guess the includes change depending in the ESP32 type.

Of course the problem may be somewhere in my W10 (I get the same error on 2 PCs) or in my setup but it is rather strange that this would make build fail just for the RISC-V modules.

Is there debug options I could use ?

[brunofr]

After more searches I found that there are many copies file c++config.h in subdirectories under .....\tools\riscv32-esp-elf\esp-12.2.0_20230208\riscv32-esp-elf\riscv32-esp-elf\include\c++\12.2.0\riscv32-esp-elf\ .
After that I managed to get a successful build by adding a path to a directory where there is a c++config.h file in INCLUDES statements in the build.ninja file. I did that to fix the builds for 22 obj files so the builds complete without error.

Below the statement I added :

Code: Select all

-IC:/Users/Bruno/Documents/Espressif/esp-idf/V5.1.2/tools/riscv32-esp-elf/esp-12.2.0_20230208/riscv32-esp-elf/riscv32-esp-elf/include/c++/12.2.0/riscv32-esp-elf

As an example this is how a build command looks like with my change :

Code: Select all

build esp-idf/cxx/CMakeFiles/__idf_cxx.dir/cxx_exception_stubs.cpp.obj: CXX_COMPILER____idf_cxx_ C$:/ESP-IDF/v5.1.2/esp-idf/components/cxx/cxx_exception_stubs.cpp || cmake_object_order_depends_target___idf_cxx
  DEFINES = -DESP_PLATFORM -DIDF_VER=\"v5.1.2\" -DSOC_MMU_PAGE_SIZE=CONFIG_MMU_PAGE_SIZE -D_GNU_SOURCE -D_POSIX_READER_WRITER_LOCKS
  DEP_FILE = esp-idf\cxx\CMakeFiles\__idf_cxx.dir\cxx_exception_stubs.cpp.obj.d
  FLAGS = -march=rv32imac_zicsr_zifencei  -fdiagnostics-color=always -ffunction-sections -fdata-sections -Wall -Werror=all -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=unused-but-set-variable -Wno-error=deprecated-declarations -Wextra -Wno-unused-parameter -Wno-sign-compare -Wno-enum-conversion -gdwarf-4 -ggdb -nostartfiles -Og -fmacro-prefix-map=C:/Users/Bruno/Documents/Espressif/Projects/v5.1.2/Test=. -fmacro-prefix-map=C:/ESP-IDF/v5.1.2/esp-idf=/IDF -fstrict-volatile-bitfields -fno-jump-tables -fno-tree-switch-conversion -DconfigENABLE_FREERTOS_DEBUG_OCDAWARE=1 -std=gnu++2b -fno-exceptions -fno-rtti
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What seems wierd to me is that there is no c++config.h files in the directories listed in the INCLUDES statements in the build.ninja file as created by CMAKE.

Of course my change is just a workaround which wiped out whenever the build.ninja file is recreated.

The content of the path I added in the INCLUDES statement is build at installation time and is not customization dependent so I guess my questions now are :
- Should CMAKE add paths to directories with a c++config.h file in the INCLUDES statements when the build.ninja file is created ?
- or is there a why to append some sort of default path to the INCLUDES statements in the ESP-IDF customization ?

Right now I feel alone in the Titanic ..Help please!

Bruno

[brunofr]

Problem fixed. The build failed as the path length to included files exceeded some limit somewhere.
No sure where this limit is as the registry key \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem\LongPathsEnabled exists in my W10s and is set to 1 thus permitting an extended-length path of32767 character max.
During my tests, build for the ESP32H2 worked after I installed the esp-idf extension in VSCode under my user home directory (C:\Users\Bruno\) instead of directory 'C:\Users\Bruno\Documents\'.
But still the limit can be exceeded if too long qualifiers are used for the installation directory.
By instance, the build for ESP32H2 works when the extension is placed in C:\Users\Bruno\esp\V5.1.2 but it fails when the extension is in C:\Users\Bruno\esp_very_very_long_name\v5.1.2\.

Kind of funny that the problem did not surface for build done for Xtensa based ESP32 modules.

I wonder if a limit for path names might be reached in the esp-idf code itself. If such it would be good to have it checked so the user is warned during the installation procedure..if not, my bad