build_src_flags impacts not only src_dir but also dependencies?

[MacDada]

• PlatformIO Core.

PlatformIO Version (platformio --version): PlatformIO Core, version 6.1.7

Description of problem

According to the docs build_src_flags "will be applied only for the project source files in the src_dir directory".

The problem is, it also applies to dependencies (external libraries) while… running tests :P

Steps to Reproduce

1. platform: native
2. lib_deps = fabiobatsilva/ArduinoFake@0.3.1
3. build_src_flags = -Wpedantic
4. pio test

Actual Results

In file included from test/native/DnAppLogger/Decorator/test_SequenceLogger/SequenceLoggerTest.cpp:8:
In file included from lib/DnAppCommon/src/DnApp/Common/Strings.h:3:
In file included from arduino/cstdarg/cstdarg:13:
In file included from .pio/libdeps/native_arduino/ArduinoFake/src/Arduino.h:1:
In file included from .pio/libdeps/native_arduino/ArduinoFake/src/ArduinoFake.h:11:
.pio/libdeps/native_arduino/ArduinoFake/src/fakeit/fakeit.hpp:5749:27: warning: zero size arrays are an extension [-Wzero-length-array]
        char instanceArea[SIZE ? SIZE : 0];
                          ^~~~~~~~~~~~~~~
.pio/libdeps/native_arduino/ArduinoFake/src/fakeit/fakeit.hpp:6027:36: note: in instantiation of template class 'fakeit::FakeObject<FunctionFake>' requested here
        static_assert(sizeof(C) == sizeof(FakeObject<C, baseclasses...>), "This is a problem");
                                   ^
.pio/libdeps/native_arduino/ArduinoFake/src/fakeit/fakeit.hpp:7935:41: note: in instantiation of template class 'fakeit::DynamicProxy<FunctionFake>' requested here
        DynamicProxy<C, baseclasses...> _proxy;
                                        ^

Expected Results

Clean test results, without the issues from external ArduinoFake library.

If I remove build_src_flags = -Wpedantic, the issues do not appear, so clearly build_src_flags impacts code outside of the src dir…

---

• a.) There is a bug in platformio core –> build_src_flags should not impact code from external libraries.
• b.) There is a bug in platformio docs -> it should be better explained what's actually going on.

[ivankravets]

Could you try to run in verbose mode -vvv? Do you see -Wpedantic for dependencies?

Please take a look at the chain, flag was applied for SequenceLoggerTest.cpp:8: where later that file included nested headers...

[ivankravets]

Please reopen if you still need help