[oi-dev] Python 2.7 SPARC build needs an adjusted patch and a new patch

[Aurélien Larcher]

On Mon, Jun 4, 2018 at 2:26 AM, Gary Mills <gary_mills at fastmail.fm> wrote:

> In an attempt to build python2.7 on a T2000 (SPARC), I received this
> error:
>
>     /usr/gcc/4.4.4/bin/gcc -m32 -O3 -mno-app-regs -fPIC -DPIC -std=c99
> -D_XOPEN_SOURCE=600 -m32 -fPIC -DPIC -R/usr/gnu/lib -L/usr/gnu/lib  -o
> python \
>                 Modules/python.o \
>                 -L. -lpython2.7 -lsocket -lnsl -ldl    -lm
>     Undefined                   first referenced
>      symbol                         in file
>     asm                                 ./libpython2.7.so
>     ld: fatal: symbol referencing errors. No output written to python
>     collect2: ld returned 1 exit status
>
> This happens because Python/ceval.c contains two instances of code
> like this:
>
>       #if defined(__sparc)
>     +   asm("nop");
>       #endif
>
> This code was inserted by a patch called 05-dtrace.patch .  The file
> dtrace.patch.diff, attached to this message, shows the changes I made
> to the patch.  These changes fix the problem.
>
> One of the modules also failed to build, producing these errors:
>
>     /export/home/mills/Downloads/code/oi-userland/components/
> python/python27/Python-2.7.14/Modules/_ctypes/libffi/src/sparc/ffi.c:526:
> error: 'asm' undeclared (first use in this function)
>     /export/home/mills/Downloads/code/oi-userland/components/
> python/python27/Python-2.7.14/Modules/_ctypes/libffi/src/sparc/ffi.c:526:
> error: expected ';' before 'volatile'
>
> The new patch 31-sparc.patch, also attached, fixes this problem.
> Finally, I updated COMPONENT_REVISION in the Makefile to signal the
> presence of the adjusted patch and the new one as in the file
> Makefile.diff, also attached.
>
> These changes only affect the SPARC build.  Later python versions
> likely require the same changes, but I haven't checked.
>
> I'd appreciate it if somebody could verify that these changes are
> correct.  I assume they are.  The build completes after these changes
> are made.
>

Why not just activate GNU extensions with -std=gnu99?
Python 2.7 was probably compiled with them until I added -std=c99.


>
>
> --
> -Gary Mills-            -refurb-                -Winnipeg, Manitoba,
> Canada-
>
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>



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