Ping on ticket 4728 + patch

[Sebastian Huber]

On 20/10/2022 03:48, Alan Cudmore wrote:
> On Wed, Oct 19, 2022 at 12:24 AM Sebastian Huber
> <sebastian.huber at embedded-brains.de> wrote:
>>
>> On 18/10/2022 21:02, Alan Cudmore wrote:
>>> *From: *Sebastian Huber <mailto:sebastian.huber at embedded-brains.de>
>>> *Sent: *Tuesday, October 18, 2022 11:15 AM
>>> *To: *Alan Cudmore <mailto:alan.cudmore at gmail.com>; joel at rtems.org
>>> <mailto:joel at rtems.org>
>>> *Cc: *rtems-devel at rtems.org <mailto:devel at rtems.org>
>>> *Subject: *Re: Ping on ticket 4728 + patch
>>>
>>> On 18/10/2022 16:36, Alan Cudmore wrote:
>>>
>>>   > On Tue, Oct 18, 2022 at 9:55 AM Joel Sherrill<joel at rtems.org>  wrote:
>>>
>>>   >>
>>>
>>>   >>
>>>
>>>   >> On Tue, Oct 18, 2022 at 8:44 AM Alan
>>> Cudmore<alan.cudmore at gmail.com>  wrote:
>>>
>>>   >>> The log does have the error, and I get it when building by hand too:
>>>
>>>   >>> start.o: in function `.L0 ':
>>>
>>>   >>>
>>> /home/alan/rtems/test-build/rtems-tmp/build/riscv/rv32imafdc/../../../bsps/riscv/shared/start/start.S:86:(.bsp_start_text+0x5c):
>>>
>>>   >>> relocation truncated to fit: R_RISCV_GPREL_I against symbol
>>>
>>>   >>> `bsp_section_bss_size' defined in*ABS*  section in
>>>
>>>   >>>
>>> /home/alan/rtems/test-build/rtems-tmp/build/riscv/rv32imafdc/testsuites/samples/minimum.exe
>>>
>>>   >>> collect2: error: ld returned 1 exit status
>>>
>>>   >>
>>>
>>>   >>
>>>
>>>   >> Hmmm.. that's weird. You should never get a truncation error linking
>>> minimum.exe.
>>>
>>>   >> It should always fit within the BSP's memory and not have any issues
>>> with branches
>>>
>>>   >> or calls needing fixup.
>>>
>>>   >>
>>>
>>>   >> Unless the wrong type of branch/jump/call instruction is used at
>>> start.S:86, I have
>>>
>>>   >> no idea.If it's a form that assumes a short distance to the
>>> destination but is going
>>>
>>>   >> to a symbol outside start.S and thus could be further.
>>>
>>>   > Also, 6 of the samples such as hello.exe link without error.
>>>
>>>   > The rv32imafdc BSP variant does not have CPU_CFLAGS.
>>>
>>>   > rv32imafd links fine and has specific CPU_CFLAGS, rv32imafdc does not
>>>
>>>   > have the flags.
>>>
>>>   > (I'll research the gcc defaults and architecture differences next..)
>>>
>>>   >
>>>
>>>   > I get a similar error on the frdme310arty BSP but only on a specific
>>>
>>>   > POSIX testsuite executable:
>>>
>>>   >
>>>
>>>   > start.o: in function `.L0 ':
>>>
>>>   >
>>>
>>>   >
>>> /home/alan/rtems/test-build/rtems-tmp/build/riscv/frdme310arty/../../../bsps/riscv/shared/start/start.S:86:(.bsp_start_text+0x28):
>>>
>>>   > relocation truncated to fit: R_RISCV_GPREL_I against symbol
>>>
>>>   > `bsp_section_bss_size' defined in*ABS*  section in
>>>
>>>   >
>>> /home/alan/rtems/test-build/rtems-tmp/build/riscv/frdme310arty/testsuites/validation/ts-validation-io-kernel.exe
>>>
>>>   >
>>>
>>>   > collect2: error: ld returned 1 exit status
>>>
>>> My off hand guess is that this is a tool chain issue on certain host
>>>
>>> systems. For example, I never got this error on our OpenSUSE machines.
>>>
>>> I can set up a OpenSUSE virtual machine and try it. I noticed the RSB
>>> documentation does not have a set of packages for OpenSUSE – I could
>>> send a docs patch after a successful build. What release do you use? Do
>>> you have a list of packages to install?
>>
>> We use openSUSE Leap 15.3 and 15.4. To get the packages maybe try this:
>>
>> zypper in -t pattern devel_C_C++ devel_python3
> 
> I was able to set up an openSUSE Leap 15.4 (64 bit) VM and the above
> packages worked for the RSB build.
> Unfortunately, I still get the same link error for minimum.exe. Do you
> think this is a linker error? Is it worth trying a Clang build?

I am not really sure what it its, since I never got this error on one of 
our machines.

What happens if you compile the attached files with:

riscv-rtems6-gcc start.S abs.S -Wl,-gc-sections

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