Break libjava -> libsupc++ dependency - merged to 3.0 branch

["Zack Weinberg" <zackw at stanford dot edu>]

I've merged the patches to decouple libjava from libsupc++ to the 3.0
branch.  The change logs follow.  The patches are unchanged from what
they were on the trunk, so I haven't included them again.

Tested with --enable-languages=c,c++,objc,f77,java on i686-linux.
Java's in good shape on the branch:

                === libjava tests ===
XPASS: N19990310_4 output from source compiled test
XPASS: N19990310_4 -O output from source compiled test
XPASS: stringconst output from bytecode->native test
XPASS: stringconst -O output from bytecode->native test
XPASS: stub compilation from source
XPASS: stub byte compilation
XPASS: stub compilation from bytecode
XPASS: stub -O compilation from source
XPASS: stub byte compilation
XPASS: stub -O compilation from bytecode
                === libjava Summary ===
# of expected passes            1676
# of unexpected successes       10
# of expected failures          14
# of untested testcases         16

Maybe we could look into verifying those unexpected passes and making
them normal?

-- 
zw   You have to care about the 'fair trial' part; you have to care about
     the 'due process of law' part, and you have to care about these things
     *more* than you care about putting child molestors away.
     	-- Graydon Saunders


2001-05-19  Bryce McKinlay  <bryce@albatross.co.nz>

	* include/jvm.h: Move "#pragma GCC java_exceptions" to ...
	* gcj/javaprims.h: ... here.
	* gnu/gcj/io/shs.cc: Add "#pragma GCC java_exceptions".

2001-05-19  Zack Weinberg  <zackw@stanford.edu>

gcc/cp:
	* except.c (choose_personality_routine): Export.  Add
	explanatory comment.  Take an enum languages, not a boolean.
	(initialize_handler_parm): Adjust to match.                 
	* cp-tree.h: Prototype choose_personality_routine.
	* lex.c (handle_pragma_java_exceptions): New function.
	(init_cp_pragma): Register #pragma GCC java_exceptions.
gcc:
	* extend.texi: Document #pragma GCC java_exceptions.
libjava:
	* Makefile.am (libgcj_la_OBJECTS): Remove libsupc++convenience.la.
	* Makefile.in: Regenerate (by hand).
	* include/jvm.h: Add #pragma GCC java_exceptions at top of file.
	* doc/cni.sgml: Document #pragma GCC java_exceptions.

	* prims.cc (_Jv_ThisExecutable): Use _Jv_Malloc.
	* posix-threads.cc (_Jv_ThreadInitData): Use _Jv_Malloc.
	(_Jv_ThreadDestroyData): Use _Jv_Free.
	* java/lang/natClassLoader.cc (_Jv_RegisterInitiatingLoader):
	Use _Jv_Malloc.