Re: error when compiling dts preprocessed with -g3

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Hi David,

Thank you for your reply.

On 20.08.2020 12:27, David Gibson wrote:
> On Fri, Aug 14, 2020 at 08:13:22PM +0200, Adrian Fiergolski wrote:
>> Hi,
>> I am using yocto to build my custom distribution targetting arm64 on
>> Ubuntu 18.04.4.
>> I have an issue compiling dts which was preprocessed with gcc version
>> 7.5.0 (I haven't tried other version) and '-g3' flag. The error message:
> Huh.  It's surprising to me that -g options affect the preprocessor
> behavior at all.
>>     ./scripts/dtc/dtc -O dtb -o
>>     arch/arm64/boot/dts/xilinx/zynqmp-falcon.dtb -b 0
>>     -i/home/afiergol/fastree/falcon/poky/build/tmp/work-shared/falcon-zynqmp/kernel-source/arch/arm64/boot/dts/xilinx/
>>     -i/home/afiergol/fastree/falcon/poky/build/tmp/work-shared/falcon-zynqmp/kernel-source/scripts/dtc/include-prefixes
>>     -Wno-unit_address_vs_reg -Wno-unit_address_format
>>     -Wno-avoid_unnecessary_addr_size -Wno-alias_paths
>>     -Wno-graph_child_address -Wno-simple_bus_reg
>>     -Wno-unique_unit_address -Wno-pci_device_reg  -d
>>     arch/arm64/boot/dts/xilinx/.zynqmp-falcon.dtb.d.dtc.tmp
>>     arch/arm64/boot/dts/xilinx/.zynqmp-falcon.dtb.dts.tmp
>>     Error: <built-in>:1.1-2 syntax error
>>     FATAL ERROR: Unable to parse input tree
>> The part of a preprocessed dts causing issue:
>>     # 1
>>     "/home/afiergol/fastree/falcon/poky/build/tmp/work-shared/falcon-zynqmp/kernel-source/arch/arm64/boot/dts/xilinx/zynqmp-falcon.dts"
>>     # 1
>>     "/home/afiergol/fastree/falcon/poky/build/tmp/work/falcon_zynqmp-poky-linux/linux-xlnx/5.4+gitAUTOINC+22b71b4162-r0/linux-falcon_zynqmp-standard-build//"
>>     # 1 "<built-in>"
>>     #define __STDC__ 1
> If it's preprocessed already, why does it still have #defines?
> This is the cause of the problem - the dtc lexer can hande the lines
> in the preprocessor output with file/linue number information, but it
> doesn't expect there to be remaining preprocessor directives.

Yes, it's preprocessed already by gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0.

Are you able to reproduce the issue (any dts including dtsi should give
similar results)?



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