RSB build failed.

[Chris Johns]

On 10/2/20 9:40 am, Chris Johns wrote:
> On 10/2/20 8:25 am, Chris Johns wrote:
>> On 9/2/20 2:18 pm, jameszxj wrote:
>>> Hi,
>>>    RSB failed when build gdb on MINGW64.
>>>
>>> error messages:
>>>
>>> D:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
>>> ada-tasks.o: in function `memcpy':
>>> D:/msys64/mingw64/x86_64-w64-mingw32/include/string.h:202: undefined reference
>>> to `__memcpy_chk'
>>> D:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
>>> arm-tdep.o: in function `memcpy':
>>> D:/msys64/mingw64/x86_64-w64-mingw32/include/string.h:202: undefined reference
>>> to `__memcpy_chk'
>>> D:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/9.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
>>> breakpoint.o: in function `strcpy':
>>> D:/msys64/mingw64/x86_64-w64-mingw32/include/string.h:228: undefined reference
>>> to `__strcpy_chk'
>>
>> I see this as well. I do not know what the cause it. It is documented in the LSB
>> code specification so am wondering if something has changed to trigger this.
> 
> Building gdb-9.1 works for ARM. I will post a patch to move RTEMS 5 to gdb-9.1
> once I have built arm, powerpc and sparc tool sets.

It looks like mingw is broken ....

x lrwxrwxrwx  0 root   root        0 Nov 08 20:34
sourceware-mirror-newlib-cygwin-d14714c69/newlib/libm/machine/x86_64/feclearexcept.c
-> ../../fenv/fenv_stub.c: Can't create
'\\\\?\\D:\\opt\\rtems\\rsb.git\\rtems\\build\\arg7ndxwm1\\sourceware-mirror-newlib-cygwin-d14714c69\\newlib\\libm\\machine\\x86_64\\feclearexcept.c'

This is due to this change from Joel in newlib around 4 months ago...

https://github.com/RTEMS/sourceware-mirror-newlib-cygwin/blob/master/newlib/libm/machine/x86_64/fesetenv.c

I though I added logic to the RSB to handle these cases but it looks like we
have another case that needs handling.

The reason the failure happens is the destination directory for the link does
not exist and so the file copy fails. On Unix system the link is a path attached
to the node and so does not need to exist until you access it. The order in the
tar file means the link appears before the destination directory.

Chris