Re: Crosstool / SH / Linux 2.6.6

[Dan Kegel <dank at kegel dot com>]

Trevor Scroggins wrote:
> > > collect2: ld terminated with signal 11 [Segmentation fault], core dumped
> > > scripts/kconfig/libkconfig.so(.text+0x0):crtstuff.c: multiple definition
> > > of `___do_sjlj_init'
> > > /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/crtbegin.o(.text+0x0):crtstuff.c:
> > > first defined here
> > > make[1]: *** [scripts/kconfig/conf] Error 1
> > > make: *** [oldconfig] Error 2
> >
> > That's interesting.  ld should not be crashing like that.
>
>
> It's failing on this command:
>
> /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../../i686-pc-cygwin/bin/ld -Bdynamic --dll-search-prefix=cyg -o scripts/kconfig/conf.exe
> /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../crt0.o
> /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/crtbegin.o -L/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1 -L/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../..scripts/kconfig/conf.o
> scripts/kconfig/libkconfig.so -lgcc -lcygwin -luser32 -lkernel32 -ladvapi32 
> -lshell32 -lgcc /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/crtend.o
>
> I don't think Cygwin likes this syntax:
>
> ld ... module.o shared.so ...
>
> A bit of tweaking on my end . . .
>
> gcc -shared -o /bin/cygkconfig.dll scripts/kconfig/zconf.tab.o
>
>  . . produces a valid shared library. (Actually, a symlink to libkconfig.so
> probably would have worked as well.)
>
> Now this works (notice the replacement of 'scripts/kconfig/libkconfig.so'
> with '-lkconfig'):
>
> /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../../i686-pc-cygwin/bin/ld -Bdynamic --dll-search-prefix=cyg -o scripts/kconfig/conf.exe
> /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../crt0.o
> /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/crtbegin.o -L/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1 -L/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../..scripts/kconfig/conf.o -lkconfig -lgcc -lcygwin -luser32 -lkernel32 -ladvapi
> 32 -lshell32 -lgcc /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/crtend.o

Very interesting.   Please report this to the cygwin mailing list and/or the binutils
mailing list.  Extra karma points if you can reproduce it with a tiny
synthetic example instead of the gcc build process.

> Now I have a 'scripts/kconfig/conf.exe' that segfaults after it can't find
> Kconfig . . . and make is still looking for scripts/kconfig/conf. Anyhow,
> I've encountered this problem on various systems with various versions of
> cygwin1.dll and the Cygwin releases of binutils and gcc.

Hmm.  Can you debug that a bit?  Maybe there a simple tweak you
could make to the conf sources that would make it happier under
Cygwin?

> I'll fire up Linux tomorrow (via coLinux--what a schnazzy piece of
> software!) and just take a look at the LinuxSH patches to 2.6.6, but my goal
> is to have a Cygwin hosted cross-compiler, not a Linux hosted
> cross-compiler. :-/

Yeah.  Good luck!
- Dan

--
My technical stuff: http://kegel.com
My politics: see http://www.misleader.org for examples of why I'm for regime change

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