LDF doesn't evaluate macro properly

[maxgerhardt]

What kind of issue is this?

• [X] PlatformIO Core. If you’ve found a bug, please provide an information below.

You can erase any parts of this template not applicable to your Issue.

---

Configuration

Operating system: Win10 x64

PlatformIO Version (platformio --version): 6.1.5a3

Description of problem

If the Arduino-ESP32's SD_MMC library is included and LDF mode deep+ or chain+ are used, the subdependency to the FS library is not detected and the build fails. PlatformIO's LDF fails to analyze the #ifdef macro correctly.

Steps to Reproduce

1. Create a new featheresp32 project
2. Add lib_ldf_mode = chain+ to platformio.ini
3. Add #include <SD_MMC.h> to src/main.cpp
4. Press Build Button

Actual Results

Dependency Graph
|-- SD_MMC @ 2.0.0
Building in release mode
[..]
*** [.pio\build\featheresp32\libd79\SD_MMC\SD_MMC.cpp.o] Error 1
In file included from src/main.cpp:2:
C:/Users/Max/.platformio/packages/framework-arduinoespressif32/libraries/SD_MMC/src/SD_MMC.h:21:10: fatal error: FS.h: No such file or directory

************************************************************
* Looking for FS.h dependency? Check our library registry!
*
* CLI  > platformio lib search "header:FS.h"
* Web  > https://registry.platformio.org/search?q=header:FS.h
*
************************************************************

 #include "FS.h"
          ^~~~~~
compilation terminated.
*** [.pio\build\featheresp32\src\main.cpp.o] Error 1

Expected Results

Successfull compilation.

Dependency Graph
|-- SD_MMC @ 2.0.0
|   |-- FS @ 2.0.0
Building in release mode
[...]
==================== [SUCCESS] Took 15.58 seconds ====================

If problems with PlatformIO Build System:

The content of platformio.ini:

[env:featheresp32]
platform = espressif32
board = featheresp32
lib_ldf_mode = chain+
framework = arduino

Source file to reproduce issue:

#include <Arduino.h>
#include <SD_MMC.h>

void setup() {}
void loop() {}

Additional info

The build always passes with the "dumb" LDF modes that don't try to evaluate macros (chain and deep).

The library conditionally includes FS.h based on

#include "soc/soc_caps.h"
#ifdef SOC_SDMMC_HOST_SUPPORTED            
#include "FS.h"

The deep+ and chain+ mode should correctly detect that the macro SOC_SDMMC_HOST_SUPPORTED is enabled (in soc/soc_caps.h for the ESP32) and detect the FS.h inclusion, but it does not.

This is showcased by adding build_flags = -DSOC_SDMMC_HOST_SUPPORTED to the platformio.ini, which makes the build pass with deep+ and chain+ modes.

[HamzaHajeir]

I'm facing a similar issue, I can't build even with deep+ ldf_mode...