Toplevel cleanup: disable Java when libffi not supported

[Paolo Bonzini]

On 04/27/2011 06:33 PM, Joseph S. Myers wrote:
> This patch, relative to a tree with
> <http://gcc.gnu.org/ml/gcc-patches/2011-04/msg02123.html>  applied,
> continues the cleanup of toplevel cases relating to disabling Java or
> Java libraries by arranging for Java to be disabled (via
> unsupported_languages) on targets not supporting libffi, and removing
> many cases in the Java-disabling case statement that are no longer
> needed, either because they relate to targets not supporting libffi or
> because they relate to targets no longer supported in GCC so it
> doesn't matter what the Java configuration is for them.
>
> The ideal would be for information about libffi-supported targets to
> come from a configure fragment in the libffi/ directory, as per item 4
> in<http://gcc.gnu.org/ml/gcc/2011-03/msg00486.html>.  Given that at
> present there is some divergence between the libffi repository and the
> GCC copy of libffi, however, now may not be the best time to add such
> a fragment in GCC; instead, I put a minimal case statement (covering
> only targets supported by both libffi and GCC) at toplevel.
>
> Where Java-disabling-related cases did more than just disabling Java
> or ${libgcj} (for example, explicitly disabling target-boehm-gc or
> target-libffi) I left them in for now even if not strictly needed with
> the separate libffi case statement.
>
> This patch is intended to be safe, in that the only way it should
> change behavior for targets supported by GCC is to disable Java in
> some cases where the libraries would not build because of lack of
> libffi support (whether or not the libraries and front end were
> previously enabled in such cases).
>
> OK to commit?
>
> 2011-04-27  Joseph Myers<joseph@codesourcery.com>
>
> 	* configure.ac: Disable Java for targets not supporting libffi.
> 	(*-*-kaos*, am33_2.0-*-linux*, sh*-*-pe|mips*-*-pe): Remove cases
> 	in Java-disabling statement.
> 	(*arm-wince-pe): Change to arm-wince-pe.
> 	(arc-*-*, arm-*-coff, arm-*-pe*, arm-*-riscix*, avr-*-*): Remove
> 	cases in Java-disabling statement.
> 	(bfin-*-*): Don't disable Java again.
> 	(c4x-*-* | tic4x-*-*, tic54x-*-*, cr16-*-*, d10v-*-*, d30v-*-*,
> 	fr30-*-elf*, moxie-*-*, h8300*-*-*, h8500-*-*, hppa1.1-*-osf* |
> 	hppa1.1-*-bsd*, hppa*-*-*elf*  | hppa*-*-lites* | hppa*-*-openbsd*,
> 	hppa*-*-pro*, i960-*-*, i[[3456789]]86-*-coff,
> 	i[[3456789]]86-*-pe, i[[3456789]]86-*-sco3.2v5*,
> 	i[[3456789]]86-*-sco*, i[[3456789]]86-*-sysv4*,
> 	i[[3456789]]86-*-beos*, i[[3456789]]86-*-rdos*,
> 	m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*): Remove cases in
> 	Java-disabling statement.
> 	(mmix-*-*): Don't disable Java again.
> 	(mt-*-*, powerpc*-*-winnt* | powerpc*-*-pe*, powerpcle-*-solaris*,
> 	powerpc-*-beos*, rs6000-*-lynxos*, rs6000-*-*, m68k-apollo-*,
> 	microblaze*, mips*-sde-elf*, mips*-*-irix5*, mips*-*-bsd*,
> 	sparclet-*-aout* | sparc86x-*-*, sparclite-*-*, sparc-*-sunos4*,
> 	tic6x-*-*, v810-*-*, vax-*-*): Remove cases in Java-disabling
> 	statement.
> 	* configure: Regenerate.
>

Ok.

Do you plan to finish the switch to unsupported_languages instead of 
noconfigdirs soon )for Java)?

Paolo