Problem building DFU example, SDK10

RE: Problem building DFU example, SDK10

Lisandro Damián Nicanor Pérez Meyer — Mon, 11 Mar 2019 18:57:16 GMT

Solves the issue. Sorry for the long delay. Client accepted the risk of going back to old compiler...

RE: Problem building DFU example, SDK10

Sigurd — Thu, 07 Mar 2019 15:52:38 GMT

But in order to find the root cause of the issue, it would be beneficial to know if using the 4.9 2015q1 resolves the issue. Also running make with verbose logging(make VERBOSE=1) could provide useful information during linking(e.g. to see that the correct optimization flags are being set).

RE: Problem building DFU example, SDK10

Lisandro Damián Nicanor Pérez Meyer — Fri, 01 Mar 2019 13:19:00 GMT

[quote userid="15146" url="~/f/nordic-q-a/44251/problem-building-dfu-example-sdk10/173707"]Could you try to download a fresh copy of SDK 10 from here, and see if it builds?[/quote]

I did before filing this case, to no avail.

[quote userid="15146" url="~/f/nordic-q-a/44251/problem-building-dfu-example-sdk10/173707"]If it does not build, then test with GCC ARM Embedded 4.9 2015q1 [/quote]

I could, but it won't help me: this is part of an upgrade to an already existing development which uses the current compiler. Switching back to such an old compiler will surely mean lots of tests to already deployed devices.

RE: Problem building DFU example, SDK10

Sigurd — Fri, 01 Mar 2019 13:06:11 GMT

Could you try to download a fresh copy of SDK 10 from here, and see if it builds?

If it does not build, then test with GCC ARM Embedded 4.9 2015q1

RE: Problem building DFU example, SDK10

Lisandro Damián Nicanor Pérez Meyer — Fri, 01 Mar 2019 12:32:23 GMT

[quote userid="15146" url="~/f/nordic-q-a/44251/problem-building-dfu-example-sdk10/173698"]Have you done any changes to the bootloader files, or to the dfu_gcc_nrf51.ld file ?[/quote]

No changes except for the compiler.

[quote userid="15146" url="~/f/nordic-q-a/44251/problem-building-dfu-example-sdk10/173698"]We have seen some issues with GCC version 7 when link time optimization (LTO) is enabled. Are you building the bootloader with the "-flto" option? If so, can you see if removing it helps? (See this post)[/quote]

No explicitly by me, might be happening if somehow that's the default. I'll check the post and the build log and come back with more info.

[quote userid="15146" url="~/f/nordic-q-a/44251/problem-building-dfu-example-sdk10/173698"]Note that we used GCC ARM Embedded 4.9 2015q1 for testing and verification of SDK 10.[/quote]

Noted, that's why I added the relevant compiler info. The strange thing is that it's the very first code that fails to build so far.

RE: Problem building DFU example, SDK10

Sigurd — Fri, 01 Mar 2019 12:28:19 GMT

Hi,

Have you done any changes to the bootloader files, or to the dfu_gcc_nrf51.ld file ?

We have seen some issues with GCC version 7 when link time optimization (LTO) is enabled. Are you building the bootloader with the "-flto" option? If so, can you see if removing it helps? (See this post)

Note that we used GCC ARM Embedded 4.9 2015q1 for testing and verification of SDK 10.