[discuss] Re: --with-sysroot required when building 32->64 bit crosstoolchain? (was: building a cross-compiler is hard)

[Daniel Kegel]

Dan Kegel wrote:
> Daniel Jacobowitz wrote:
> 
>>> It matters that it's a 32/64 bit cross environment because otherwise
>>> I wouldn't need --with-sysroot...
>>>
>>>> You can use --with-sysroot for binutils without using it for GCC.  It's
>>>> not necessarily a good idea though.
>>>
>>>
>>> I'm trying it throughout.  It's hard to figure out how to use, though.
>>> I had been jimmying things so there is no /usr, i.e. so all libraries 
>>> are
>>> in $PREFIX/lib, all includes in $PREFIX/include, as is customary when
>>> building cross-compilers.  But I get the feeling that --with-sysroot 
>>> wants
>>> me to do things the LSB way, with a split between /lib and /usr/lib,
>>> so I'm giving that a shot.  Needless to say, this is painful.  I'm
>>> currently stuck building crtbegin.o because for some reason
>>> xgcc is being told to look in $PREFIX/include... gotta figure out
>>> where I missed adding a /usr ... grumble.
>>
>>
>>
>> Try a symlink usr -> . then?

Found where to insert the missing /usr.  Now the toolchain builds,
but gcc is passing crt1.o to ld without a path!  This would work
if ld searched SEARCH_DIR / -L directories for crt1.o, but it
doesn't.

Details at http://gcc.gnu.org/ml/gcc/2004-01/msg00521.html

- Dan