[Bug bootstrap/49555] libjava fails to configure if --enable-symvers=gnu or --enable-symvers=sun

[bryanhundven at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49555

Bryan Hundven <bryanhundven at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |yann.morin.1998 at free dot
                   |                            |fr

--- Comment #4 from Bryan Hundven <bryanhundven at gmail dot com> 2011-06-28 21:01:43 UTC ---
(In reply to comment #3)
> (In reply to comment #2)
> > Please provide a bit mor information:

Sure. Re-reading comment #3, maybe I sounded a bit brass.
Let me try again.

Yann requested to be CC'd.

> > * what platform are you on?
> 
> It happens on every platform I configure, but if you want something specific:
> --build=i686-unknown-linux-gnu --host=i686-unknown-linux-gnu
> --target=x86_64-unknown-linux-gnu
> 
> I also have the same problems on:
> --build=i686-unknown-linux-gnu --host=i686-unknown-linux-gnu
> --target=mips64-unknown-linux-gnu
> 
> and:
> --build=x86_64-unknown-linux-gnu --host=x86_64-unknown-linux-gnu
> --target=powerpc-unknown-linux-gnuspe

same response.

> This is a build from crosstool-ng. --enable-symvers=gnu is set staticly in:
> http://crosstool-ng.org/hg/crosstool-ng/file/tip/scripts/build/cc/gcc.sh
> 
> > * what are your configure options?
> 
> --enable-languages=c,c++,fortran,objc,obj-c++ --disable-multilib
> --with-tune=core2 --with-pkgversion=crosstool-NG hg_unknown@20110627.135200
> --disable-sjlj-exceptions --enable-__cxa_atexit --enable-libmudflap
> --enable-libgomp --enable-libssp
> --with-gmp=/home/bryan/builds/x86_64-unknown-linux-gnu/.build/x86_64-unknown-linux-gnu/build/static
> --with-mpfr=/home/bryan/builds/x86_64-unknown-linux-gnu/.build/x86_64-unknown-linux-gnu/build/static
> --with-mpc=/home/bryan/builds/x86_64-unknown-linux-gnu/.build/x86_64-unknown-linux-gnu/build/static
> --with-ppl=/home/bryan/builds/x86_64-unknown-linux-gnu/.build/x86_64-unknown-linux-gnu/build/static
> --with-cloog=/home/bryan/builds/x86_64-unknown-linux-gnu/.build/x86_64-unknown-linux-gnu/build/static
> --with-libelf=/home/bryan/builds/x86_64-unknown-linux-gnu/.build/x86_64-unknown-linux-gnu/build/static
> --with-host-libstdcxx=-static-libgcc -Wl,-Bstatic,-lstdc++ -lm
> -L/home/bryan/builds/x86_64-unknown-linux-gnu/.build/x86_64-unknown-linux-gnu/build/static/lib
> -lpwl --enable-threads=posix --enable-target-optspace --disable-libstdcxx-pch
> --with-long-double-128 --enable-gold

Same response.

> > * why do you insist on specifying the symvers flavor manually?

I had a discussion with Yann E. Morin, and it sounds like this option was
ported forward from the legacy options in Dan Kegel's crosstool.

The questions I am asking should be:

* Should this ever (for any platform) be set manually? Or should this always be
an 'automatic' setting?

* Isn't it inconsistent that every component checks for 'gnu*' and 'sun',
except for libjava?

Yann is currently retesting the sh4 build without --enable-symvers=gnu set to
see if it still needs it. If it does not, then he will remove it completely,
otherwise it should be target specific in crosstool-ng and not for all targets.

> "I" didn't insist on specifying it manually. crosstool-ng did.
> While you might say that is a problem with crosstool-ng, but the older
> crosstool and other cross tool scripts use this as well.
> 
> If every other component besides libjava specifically check for
> yes|no|gnu*|sun, why doesn't libjava?
> 
> Or...
> 
> If I shouldn't use --enable-symvers=gnu, shouldn't all other components fail to
> support it?