[Etoys] A new experimental version of OLPC image for non-XO environments

Yoshiki Ohshima yoshiki at vpri.org
Thu Feb 28 03:03:16 EST 2008

> Uh-oh! FC6's gcc introduced a new hash by default in FC6 which results in FP 
> exception on older FC and other linux distributions. If you cannot avoid 
> FC6+, use "-Wl,--hash-style=sysv" or "-Wl,--hash-style=both" to generate 
> compatible executables. The hash-style option is specific to FC6+ and won't 
> be recognized by other gcc so you cannot make a permanent change in the 
> Makefile. You may want to do:
>   $ make XCFLAGS="-Wl,--hash-style=sysv" XLDFLAGS="--hash-style=sysv"
> To check:
> $ readelf -l 3.9-12/squeak | grep hash
>    02     .interp .note.ABI-tag .gnu.hash .dynsym .dynstr
>                                             ^^^^^^ causes FP exception.
> $ readelf -l 3.9-12/squeak | grep hash
>    02     .interp .note.ABI-tag .hash .dynsym .dynstr 
>                                             ^^^^ compatible one

  Ah, it was a completely known problem, then.  OLPC's suggested
development environment is FC and we are just using it but I didn't
know about this.  If the binary is fine on XO, probably we can use the
option and have less headache.

  Thank you!

-- Yoshiki

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