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From: Varun Iyer <>
Cc: kernelnewbies <>
Subject: Re: is there a macro symbol for strlen($LINUX_SOURCE_PATH)
Date: Wed, 4 Sep 2019 15:18:17 -0700
Message-ID: <20190904221817.gismdbom2rkdyfx6@varun-laptop> (raw)
In-Reply-To: <>

On 19/09/04 03:42PM, wrote:
> in the kernel, there are a lot of usages of __FILE__
> this means that there are a lot of copies of fully rooted paths,
> including all the varying ~/src/linux prefixes used by individual builders.

On gcc, `__FILE__` is the path of the file relative to the directory that the
build is run from.

Try something like
#include <stdio.h>
#define testing() printf("%s\n", __FILE__)
int main() { testing(); }

and compile it from different directories to replicate this behaviour.

> Id hazard a guess that something like __RELPATH_FILE__
> would work in many cases and perhaps even be more readable
> (by reducing long strings) in the generated output
> Do the macros exist to cobble this together for compile-time ?
> Does it warrant a short name ? either to wrap __FILE__ uses or replace them ?
> _______________________________________________
> Kernelnewbies mailing list

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Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-04 21:42 jim.cromie
2019-09-04 22:18 ` Varun Iyer [this message]
2019-09-05 14:31   ` jim.cromie
2019-09-05 20:23     ` Valdis Klētnieks
2019-09-05  5:47 ` Greg KH

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