This changes gdb/compile to use gdb_argv directly, rather than
manually managing the arrays itself. A few new helpers are added to
gdb_argv.
gdb/ChangeLog
2020-09-23 Tom Tromey <tom@tromey.com>
* utils.h (class gdb_argv): Add move operators.
<append>: New methods.
* compile/compile.c (build_argc_argv): Remove.
(compile_args_argc): Remove.
(compile_args_argv): Change type.
(set_compile_args): Simplify.
(append_args): Remove.
(filter_args): Remove argcp parameter.
(get_args): Return gdb_argv. Simplify.
(compile_to_object): Update.
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