libjava.exp (bytecompile_file): Use `env(SUN_JAVAC)', that defaults to javac, as Sun-javac compiler or compatible.

1999-07-31  Alexandre Oliva  <oliva@dcc.unicamp.br>

	* lib/libjava.exp (bytecompile_file): Use `env(SUN_JAVAC)', that
	defaults to javac, as Sun-javac compiler or compatible.
	(libjava_init): Get GCJ from environment if neither GCJ_UNDER_TEST
	nor TOOL_EXECUTABLE are set.  Set `original_ld_library_path' from
	environment.
	(libjava_arguments): Prepend `.' and `$srcdir/$subdir' to
	CLASSPATH, for `support' sources.  Search for libgcj.spec in
	`$objdir/..', by adding -B to GCJ_UNDER_TEST.  Append
	original_ld_library_path to ld_library_path.
	* libjava.mauve/mauve.exp (test_mauve): Set `env(GCJ)' from
	GCJ_UNDER_TEST, calculated just like in libjava.exp.

From-SVN: r28364