Errors with clangd LSP server when using generated compile_commands.json

[fikovnik]

Configuration

Operating system: Linux (Arch, 5.14.14)

PlatformIO Version: 5.2.2

Description of problem

(I first asked in the forum where it was suggested I open an issue here.)

I have the following project definition (platform.ini):

[env:d1_mini]
platform = espressif8266
board = d1_mini
framework = arduino

I generate the compile_commands.json using:

pio run -t compiledb

and then I move it to the project root

mv .pio/build/d1_mini/compile_commands.json compile_commands.json

When I run clangd LSP I keep getting the follow 5 errors even though the project builds just fine:

- [drv_unknown_argument_with_suggestion] Line 1: unknown argument '-mlongcalls'; did you mean '-mlong-calls'?
- [redefinition_different_typedef] Line 25: in included file: typedef redefinition with different types ('int' vs 'ssize_t' (aka 'long'))
- [drv_unknown_argument] Line 1: unknown argument: '-mtext-section-literals'
- [drv_unknown_argument_with_suggestion] Line 1: unknown argument '-free'; did you mean '-fsee'?
- [drv_unknown_argument] Line 1: unknown argument: '-fipa-pta'

This example is for the ESP8266WiFi.cpp, but any source file in my project gives the same errors. There will be at least the unknown arguments and the typedef redefinition will be seen if I include the ESP8266WiFi.h or ESP8266WebServer.h.

I'm running the clangd from neovim, but it behaves the same if I run it directly using:

clangd --compile-commands-dir=. --query-driver=/home/krikava/.platformio/packages/toolchain-xtensa/bin/xtensa-lx106-elf-g++ --check=/home/krikava/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266WiFi/src/ESP8266WiFi.cpp

from the project directory, i.e. where I have the compile_commands.json.

The drv_unknown_argument* errors are easy to fix via using .clangd config like:

CompileFlags:
  Remove: [-mlongcalls, -free, -mtext-section-literals, -fipa-pta]

But how can I fix the typedef redefinion?

Additional info

Just for reference, this is the compile_commands.json entry for ESP8266WiFi.cpp:

    {
        "command": "/home/krikava/.platformio/packages/toolchain-xtensa/bin/xtensa-lx106-elf-g++ -o .pio/build/d1_mini/lib84b/ESP8266WiFi/ESP8266WiFi.cpp.o -c -fno-rtti -std=gnu++17 -fno-exceptions -Os -mlongcalls -mtext-section-literals -falign-functions=4 -U__STRICT_ANSI__ -D_GNU_SOURCE -ffunction-sections -fdata-sections -Wall -Werror=return-type -free -fipa-pta -DPLATFORMIO=50202 -DESP8266 -DARDUINO_ARCH_ESP8266 -DARDUINO_ESP8266_WEMOS_D1MINI -DF_CPU=80000000L -D__ets__ -DICACHE_FLASH -DARDUINO=10805 -DARDUINO_BOARD=\\\"PLATFORMIO_D1_MINI\\\" -DFLASHMODE_DIO -DLWIP_OPEN_SRC -DNONOSDK22x_190703=1 -DTCP_MSS=536 -DLWIP_FEATURES=1 -DLWIP_IPV6=0 -DVTABLES_IN_FLASH -DMMU_IRAM_SIZE=0x8000 -DMMU_ICACHE_SIZE=0x8000 -I/home/krikava/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266WiFi/src -I/home/krikava/.platformio/packages/framework-arduinoespressif8266/tools/sdk/include -I/home/krikava/.platformio/packages/framework-arduinoespressif8266/cores/esp8266 -I/home/krikava/.platformio/packages/toolchain-xtensa/include -I/home/krikava/.platformio/packages/framework-arduinoespressif8266/tools/sdk/lwip2/include -I/home/krikava/.platformio/packages/framework-arduinoespressif8266/variants/d1_mini /home/krikava/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266WiFi/src/ESP8266WiFi.cpp",
        "directory": "/home/krikava/Projects/air-quality-sensor/V3",
        "file": "/home/krikava/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266WiFi/src/ESP8266WiFi.cpp"
    },

[ivankravets]

This is not a bug of PlatformIO, see related issues:

• Query the compiler driver for pre-defined macros clangd/clangd#533
• https://bugs.llvm.org/show_bug.cgi?id=48266

[fikovnik]

Thank you. I will follow it upstream.

[zaxioms0]

@fikovnik did you manage to fix this by any chance?

[fikovnik]

@fikovnik did you manage to fix this by any chance?

No, I have not.