not sure why i can't dtx_diff two .dts files if they're located
outside of a kernel source tree -- the dtx_diff script certainly seems
to suggest that's possible.
with my kernel source tree at ~/k/git, i set things up with:
$ PATH=$PATH:~/k/git/scripts/dtc
$ export ARCH=arm
first test, which works just fine (comparing imx6q-sabresd.dts and
imx6qp-sabresd.dts), first "cd"ing to the top of my kernel source
git repo:
$ cd ~/k/git
$ dtx_diff arch/arm/boot/dts/imx6q{,p}-sabresd.dts
appears to work fine, no need to use either of -s or -S to identify
the source tree since, by default, the script assumes that's where
you're located.
next, "cd" down to that dts directory and try the same command
again:
$ cd arch/arm/boot/dts
$ dtx_diff imx6q{,p}-sabresd.dts
not surprisingly, it fails:
In file included from imx6qp.dtsi:43:0,
from imx6qp-sabresd.dts:45:
imx6q.dtsi:11:50: error: no include path in which to search for dt-bindings/interrupt-controller/irq.h
#include <dt-bindings/interrupt-controller/irq.h>
but either of the following two variations works just fine, since
you're identifying the location of the source tree git repo (that you
just happen to be inside of):
$ dtx_diff -S imx6q{,p}-sabresd.dts
$ dtx_diff -s ~/k/git imx6q{,p}-sabresd.dts
however, if i copy those two files to /tmp and try the comparison
there, even if i identify the same kernel source directory:
$ cp imx6q{,p}-sabresd.dts /tmp
$ cd /tmp
$ dtx_diff -s ~/k/git imx6q{,p}-sabresd.dts
ruh roh ...
imx6qp-sabresd.dts:45:10: fatal error: imx6qp.dtsi: No such file or
directory
#include "imx6qp.dtsi"
^~~~~~~~~~~~~
compilation terminated.
imx6q-sabresd.dts:15:10: fatal error: imx6q.dtsi: No such file or
directory
#include "imx6q.dtsi"
^~~~~~~~~~~~
compilation terminated.
obviously(?), the cpp include path is not being set correctly, but
why not? i'm checking the dtx_diff script right now to see what's
going into cpp_flags, but should this not work? should i not be
allowed to compare two .dts files outside the boundaries of a kernel
source tree as long as i provide a perfectly kernel source tree for it
to use? or does one need to manually configure the header file search
path for this?
rday
--
========================================================================
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
========================================================================
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