Differences

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--- comparing_device_trees_with_dtx_diff [2018/11/17 16:13] – [Comparing two .dts files already in the kernel source tree (Part one)] rpjday
+++ comparing_device_trees_with_dtx_diff [2018/11/17 18:33] (current) – [Comparing two .dts files already in the kernel source tree (Part deux)] rpjday
@@ Line 89: / Line 89: @@
 In short, as long as you're still inside the relevant kernel source tree, comparisons will work -- you just need to make sure the ''dtx_diff'' script is told where the top of the kernel source tree is.
+===== Comparing two device tree files out of tree -- apparent bug =====
+What doesn't seem to work is comparing two device tree files that are outside the confines of a kernel source tree, even if you identify the kernel source tree. Below, I copy the same two files to ''/tmp'' and try to do the comparison there, referring back to the same kernel source tree:
+<code>
+$ cp imx6q{,p}-sabresd.dts /tmp
+$ cd /tmp
+$ dtx_diff -s ~/k/git imx6q{,p}-sabresd.dts
+imx6qp-sabresd.dts:45:10: fatal error: imx6qp.dtsi: No such file or directory
+ #include "imx6qp.dtsi"
+          ^~~~~~~~~~~~~
+imx6q-sabresd.dts:15:10: fatal error: imx6q.dtsi: No such file or directory
+ #include "imx6q.dtsi"
+          ^~~~~~~~~~~~
+compilation terminated.
+compilation terminated.
+Error: imx6qp-sabresd.dts:43.9-10 Error: imx6q-sabresd.dts:13.9-10 syntax errorsyntax error
+FATAL ERROR: FATAL ERROR: Unable to parse input tree
+Unable to parse input tree
+Possible hints to resolve the above error:
+  (hints might not fix the problem)
+Possible hints to resolve the above error:
+  (hints might not fix the problem)
+  No hints available.
+  No hints available.
+$
+</code>
+I have no idea why this fails -- obviously, even when telling ''dtx_diff'' where the kernel source tree is, the include search path is not being set correctly. I've already reported this as an apparent bug to the device tree mailing list.