Version 2.6.0 ESP-IDF Eclipse plugin still has indexer issues (IEP-752)

[mbratch]

I simply cannot get rid of the myriad of GUI C++ errors in many of my project files. The project compiles fine, so the flagged issues are falsely claimed problems. I just upgraded to 2.6.0 of the plugin but the problem still persists.

Here's just one example below. Note all of the red indicators on the scroll bar. The specific error on the highlighted line is "Member declaration not found". The member is however defined in one of the included header files. In some cases, it claims it can't find one of the ESP-IDF standard header files (e.g., "esp_adc_cal.h") but as I say, it builds fine, so it can clearly find it for the build and the file exists.

I've tried doing a fullclean and every command available under the C/C++ Indexer menu item and nothing fixes it. It's been very frustrating because a lot of the great GUI features such as auto-completion or looking up a function or method simply don't work if it thinks there's an error associated with it.

To reproduce, I just have to open my project and observe.

Expected behavior I would expect reindexing at least to clear the errors. This actually used to work many months ago.... that is, I would get the false erros but used to be able to clear them with reindexing. THis hasn't worked in a long time.

Environment Information: See attached file. EclipseConfig.txt

ESP-IDF Tools Information: The comand "Help > Espressif Tools Manager > List Installed Tools" doesn't exist. I used "Espressif > ESP-IDF Tool Manager > List installed tools":

Executing C:\Users\mdbra\AppData\Local\Programs\Python\Python39\python.exe C:\Users\mdbra.espressif\frameworks\esp-idf-v4.4.2\tools\idf_tools.py list

• xtensa-esp32-elf: Toolchain for Xtensa (ESP32) based on GCC
  • esp-2021r2-patch3-8.4.0 (recommended, installed)
• xtensa-esp32s2-elf: Toolchain for Xtensa (ESP32-S2) based on GCC
  • esp-2021r2-patch3-8.4.0 (recommended, installed)
• xtensa-esp32s3-elf: Toolchain for Xtensa (ESP32-S3) based on GCC
  • esp-2021r2-patch3-8.4.0 (recommended, installed)
• xtensa-clang: LLVM for Xtensa (ESP32, ESP32-S2) based on clang (optional)
  • 12.0.1-d9341b81fc (recommended, installed)
• riscv32-esp-elf: Toolchain for 32-bit RISC-V based on GCC
  • esp-2021r2-patch3-8.4.0 (recommended, installed)
• esp32ulp-elf: Toolchain for ESP32 ULP coprocessor
  • 2.28.51-esp-20191205 (recommended, installed)
• esp32s2ulp-elf: Toolchain for ESP32-S2 and ESP32-S3 ULP coprocessors
  • 2.28.51-esp-20191205 (recommended, installed)
• cmake: CMake build system
  • 3.23.1 (recommended, installed)
• openocd-esp32: OpenOCD for ESP32
  • v0.11.0-esp32-20220411 (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)
  • 4.3 (recommended, installed)
• dfu-util: dfu-util (Device Firmware Upgrade Utilities)
  • 0.9 (recommended, installed)

IDF Eclipse Plugin Version: 2.6.0

Eclipse Error log: Attached EclipseError.log

[mbratch]

I found a few places in Eclipse settings for the ESP-IDF framework path and updated those as they weren't up to date. They must all be hunted down and changed manually after upgrading the framework version. This seemed to clear up many of the false errors. However, there are still several of them.

[mbratch]

One thing I discovered is that the indexer doesn't seem to be smart about nested includes. So if I do this in my source file:

#include <foo.h>

And inside of foo.h I have:

#include <bar.h>

And inside bar.h there's a symbol that I'm referencing in my original source file, it will sometimes be flagged as unresolved by the indexer, but the compile of course works fine. This is happening on one of my projects but not on another one. I can't explain why it happens only sometimes.

[gregtoth]

I've noticed that on every other launch of Espressif-IDE, the indexer works, symbols resolve, and Open Declaration drill-down works as expected. But for the other launches the indexer is broken, there are tons of unresolved symbols listed in Problems, and Open Declaration doesn't work. Example: Launch ide and indexer is broken. Quit IDE, then launch again, and indexer is okay. Quit ide, then launch again, and indexer is broken. This cycle repeats over and over and seems to be 100% repeatable with clean install of Espressif-IDE 2.10.0, IDF v5.1, and blink example project. Maybe a clue as to the underlying indexer issue?