[Scons-users] How to use -isystem instead of -I to include directories of third-party projects in scons?

[Lan Yang]

On Wed, Nov 30, 2022 at 3:57 PM Mats Wichmann <mats at wichmann.us> wrote:

> Your approach is a valid one, but SCons does not, unfortunately support
> -isystem fully (issue #3064 exists to record this). You can add it directly
> to CCFLAGS and it should be emitted to gcc; and the MergeFlags method knows
> how to do this also, but - unlike for values in CPPPATH - SCons won't look
> in that directory for internal dependency calculation.
> --
> Sent from my Android device with K-9 Mail. Please excuse my brevity.
>


Hi Mats,

Thank you for your email.

The scons does not support -isystem fully according to issue #3064.
https://github.com/SCons/scons/issues/3064

"You can add it directly to CCFLAGS and it should be emitted to gcc; and
the MergeFlags method knows how to do this also, but - unlike for values in
CPPPATH - SCons won't look in that directory for internal dependency
calculation."
This part confused me. I think it is because I lack some knowledge.

Are there any steps I can take to avoid the warnings in third-party's code?

Best regards,
Lan

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