Basic new project won't compile because "true" is undefined. (because __cplusplus is?) (IEP-1050)

[wiegleyj]

Describe the bug Trying to switch to eclipse and I've got the esp-idf eclipse plugin and tools installed. I created a new project with File->New->Espressif IDF Project.

The main.c program shows "while (true) {" as having the error "Symbol 'true' could not be found".

'true' is defined in stdbool.h and stdbool.h is included in main.c.

It appears that somehow main.c is being treated as a c++ file and cplusplus is defined and thus cutting out all the boolean defines that are intended for C files. I don't think cplusplus should be defined for *.c files. I can't find where there is definition is taking place.

To Reproduce Create a new Espressif IDF project. File->New->Espressif IDF Project Try to build.

Expected behavior main.c is expected to build cleanly.

Screenshots

Espressif-IDE Product Information: Executing C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.11_3.11.1776.0_x64__qbz5n2kfra8p0\python3.11.exe C:\Espressif\frameworks\esp-idf-v5.1.1\tools\idf_tools.py list

• xtensa-esp-elf-gdb: GDB for Xtensa
  • 12.1_20221002 (recommended, installed)
• riscv32-esp-elf-gdb: GDB for RISC-V
  • 12.1_20221002 (recommended, installed)
• xtensa-esp32-elf: Toolchain for Xtensa (ESP32) based on GCC
  • esp-12.2.0_20230208 (recommended, installed)
• xtensa-esp32s2-elf: Toolchain for Xtensa (ESP32-S2) based on GCC
  • esp-12.2.0_20230208 (recommended, installed)
• xtensa-esp32s3-elf: Toolchain for Xtensa (ESP32-S3) based on GCC
  • esp-12.2.0_20230208 (recommended, installed)
• esp-clang: Toolchain for all Espressif chips based on clang (optional)
  • 15.0.0-23786128ae (recommended, installed)
• riscv32-esp-elf: Toolchain for 32-bit RISC-V based on GCC
  • esp-12.2.0_20230208 (recommended, installed)
• esp32ulp-elf: Toolchain for ESP32 ULP coprocessor
  • 2.35_20220830 (recommended, installed)
• cmake: CMake build system
  • 3.24.0 (recommended, installed)
  • 3.16.3 (supported)
• openocd-esp32: OpenOCD for ESP32
  • v0.12.0-esp32-20230419 (recommended, installed)
• ninja: Ninja build system
  • 1.10.2 (recommended, installed)
• idf-exe: IDF wrapper tool for Windows
  • 1.0.3 (recommended, installed)
• ccache: Ccache (compiler cache)
  • 4.8 (recommended, installed)
• dfu-util: dfu-util (Device Firmware Upgrade Utilities)
  • 0.11 (recommended, installed)
• esp-rom-elfs: ESP ROM ELFs
  • 20230320 (recommended, installed) OK

CDT Build environment variables PATH: C:\Users\jeffw.espressif\tools\xtensa-esp-elf-gdb\12.1_20221002\xtensa-esp-elf-gdb\bin;C:\Users\jeffw.espressif\tools\riscv32-esp-elf-gdb\12.1_20221002\riscv32-esp-elf-gdb\bin;C:\Users\jeffw.espressif\tools\xtensa-esp32-elf\esp-12.2.0_20230208\xtensa-esp32-elf\bin;C:\Users\jeffw.espressif\tools\xtensa-esp32s2-elf\esp-12.2.0_20230208\xtensa-esp32s2-elf\bin;C:\Users\jeffw.espressif\tools\xtensa-esp32s3-elf\esp-12.2.0_20230208\xtensa-esp32s3-elf\bin;C:\Users\jeffw.espressif\tools\esp-clang\15.0.0-23786128ae\esp-clang\bin;C:\Users\jeffw.espressif\tools\riscv32-esp-elf\esp-12.2.0_20230208\riscv32-esp-elf\bin;C:\Users\jeffw.espressif\tools\esp32ulp-elf\2.35_20220830\esp32ulp-elf\bin;C:\Users\jeffw.espressif\tools\cmake\3.24.0\bin;C:\Users\jeffw.espressif\tools\openocd-esp32\v0.12.0-esp32-20230419\openocd-esp32\bin;C:\Users\jeffw.espressif\tools\ninja\1.10.2\;C:\Users\jeffw.espressif\tools\idf-exe\1.0.3\;C:\Users\jeffw.espressif\tools\ccache\4.8\ccache-4.8-windows-x86_64;C:\Users\jeffw.espressif\tools\dfu-util\0.11\dfu-util-0.11-win64;C:\Users\jeffw.espressif\python_env\idf5.1_py3.11_env\Scripts;C:\Espressif\frameworks\esp-idf-v5.1.1\tools;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\Common Files\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance Toolkit\;C:\Program Files\dotnet\;C:\Program Files\Git\cmd;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\Program Files\Docker\Docker\resources\bin;C:\Users\jeffw\AppData\Local\Microsoft\WindowsApps;C:\Users\jeffw\AppData\Local\GitHubDesktop\bin;C:\Users\jeffw\AppData\Local\Programs\MiKTeX\miktex\bin\x64\;C:\Users\jeffw.dotnet\tools;C:\Users\jeffw\AppData\Local\Programs\Microsoft VS Code\bin USERDOMAIN_ROAMINGPROFILE: DESKTOP-UB7S1L9 PROCESSOR_LEVEL: 6 SESSIONNAME: Console ALLUSERSPROFILE: C:\ProgramData PROCESSOR_ARCHITECTURE: AMD64 ESP_IDF_VERSION: 5.1 PSModulePath: C:\Program Files\WindowsPowerShell\Modules;C:\Windows\system32\WindowsPowerShell\v1.0\Modules SystemDrive: C: OPENOCD_SCRIPTS: C:\Users\jeffw.espressif\tools\openocd-esp32\v0.12.0-esp32-20230419\openocd-esp32\share\openocd\scripts IDF_DEACTIVATE_FILE_PATH: C:\Users\jeffw\AppData\Local\Temp\tmpehboaqccidf_16264 IDF_CCACHE_ENABLE: 1 USERNAME: jeffw ProgramFiles(x86): C:\Program Files (x86) FPS_BROWSER_USER_PROFILE_STRING: Default PATHEXT: .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC DriverData: C:\Windows\System32\Drivers\DriverData OneDriveConsumer: C:\Users\jeffw\OneDrive ProgramData: C:\ProgramData IDF_COMPONENT_MANAGER: 1 ProgramW6432: C:\Program Files HOMEPATH: \Users\jeffw PROCESSOR_IDENTIFIER: Intel64 Family 6 Model 183 Stepping 1, GenuineIntel ProgramFiles: C:\Program Files PUBLIC: C:\Users\Public windir: C:\Windows =::: ::\ ZES_ENABLE_SYSMAN: 1 IGCCSVC_DB: AQAAANCMnd8BFdERjHoAwE/Cl+sBAAAA/Qwx+Os0vUyDHuesv+o2iQQAAAACAAAAAAAQZgAAAAEAACAAAACriWE5GvP5QF9KEN4c/y9TkIX3Upw61u3a/7sS85qmgQAAAAAOgAAAAAIAACAAAACXDPHZJYEQeT3G4ongKmajRjGi12Xf01t7MA+p1sCkxWAAAAA4mMKcS6yUNT9L7JLwDJ+Yuw4YrWCGRySc8sg/CYZ2KymE1L+iw5TTb/JpgoXh28RoWtQxvZHwhHRVOjNRscrnfiHxejn7BCR0WjBIU51TOdfbt0KsMWEhS/jI9ZRxq0FAAAAAGysGmQGntgWq/69diRMHcFVyqso5tWkFxScaPkInNMkjABAR6w7R7Q/Kj/8B9tC1OOy+mNgohV1HJ/sHjitb+g== LOCALAPPDATA: C:\Users\jeffw\AppData\Local USERDOMAIN: DESKTOP-UB7S1L9 LOGONSERVER: \DESKTOP-UB7S1L9 FPS_BROWSER_APP_PROFILE_STRING: Internet Explorer OneDrive: C:\Users\jeffw\OneDrive APPDATA: C:\Users\jeffw\AppData\Roaming EFC_9592: 1 CommonProgramFiles: C:\Program Files\Common Files OS: Windows_NT COMPUTERNAME: DESKTOP-UB7S1L9 IDF_PATH: C:\Espressif\frameworks\esp-idf-v5.1.1 PROCESSOR_REVISION: b701 CommonProgramW6432: C:\Program Files\Common Files ComSpec: C:\Windows\system32\cmd.exe STM32CubeMX_PATH: C:\Program Files\STMicroelectronics\STM32Cube\STM32CubeMX IDF_MAINTAINER: 1 TEMP: C:\Users\jeffw\AppData\Local\Temp SystemRoot: C:\Windows HOMEDRIVE: C: USERPROFILE: C:\Users\jeffw TMP: C:\Users\jeffw\AppData\Local\Temp CommonProgramFiles(x86): C:\Program Files (x86)\Common Files CDS_HOME: C:\cds_spb_home NUMBER_OF_PROCESSORS: 32 IDF_PYTHON_ENV_PATH: C:\Users\jeffw.espressif\python_env\idf5.1_py3.11_env ESP_ROM_ELF_DIR: C:\Users\jeffw.espressif\tools\esp-rom-elfs\20230320\

Operating System: windows 11 Java Runtime Version: 20.0.2+9-78 Eclipse Version: 4.29.0.v20230903-1000 Eclipse CDT Version: 11.3.0.202307110141 IDF Eclipse Plugin Version: 2.11.0.202309211121 ESP-IDF v5.1.1 Python set for IDF_PYTHON_ENV: Python 3.11.6

Eclipse Error log: bugtest.log

[sigmaaa]

Hi @wiegleyj,

I've noticed that you have the Launch Bar disabled. It's important to have it enabled to build the project with correct configuration. Please follow the below instructions to enable the LaunBar.

• Go to Preferences...
• Navigate to Run/Debug > Launching > LaunchBar
• Check Enable the LaunchBar
• Click Apply and Close

If you still see an unresolved issue after enabling the launch bar and building the project with it, it is likely caused by some C/C++ 20 language features that are not yet supported by the Eclipse CDT indexer. You can ignore them and make the following settings: https://github.com/espressif/idf-eclipse-plugin/blob/master/FAQ.md#how-to-disable-the-unresolved-symbol-error-markers

[kolipakakondal]

I just verified with the Eclipse 20230905-1907 build and ESP-IDF 5.1.1, I don't see any issue with the default example.

Having a launchbar and building a specific target should fix the issue

[wiegleyj]

I enabled launch bar. Thank you, that was helpful (though I don't think it altered anything). The project compiles (I think it did before too). I can flash it and run.

true is still not defined. I'm super skeptical that stdbool.h has changed in C/C++20. I'm not keen on the "solution" to be disabling ALL unresolved symbol errors.

Does it have anything to do with the workspace thinking that .C (not .c) are mapped as C++ files? This seems to be an IBM convention and windows doesn't treat filenames as case sensitive. Is it accidentally thinking main.c is main.C and defining __cplusplus?

[sigmaaa]

Hi @wiegleyj. I think I was able to reproduce the issue or faced a similar issue. In my case, the indexer was not able to resolve some includes until I close/reopen the project and click on build again. While we further investigating this issue, I recommend you try to close/reopen the project and click build. Also, my indexer settings look like this:

and project settings:

I'm not keen on the "solution" to be disabling ALL unresolved symbol errors.

the other possible solution is to suppress the exact place where this issue happens. To do this. Click on bug marker on the specific line and then "Supress problem "Symbol is not resolved""