PR modula2/121629: adding third party modules

This patch makes it easier to add third party modules.
cc1gm2 now appends the search directory prefix/include/m2
to the search path for non dialect specific modules.
Prior to this it appends the dialect specific subdirectories
{m2pim,m2iso,m2log,m2min} with the appropriate dialect pathname.
The patch also includes a new option -fm2-pathname-root=prefix
which allow additional prefix/m2 directories to be searched
before the default.

gcc/ChangeLog:

	PR modula2/121629
	* doc/gm2.texi (Module Search Path): New section.
	(Compiler options): New option -fm2-pathname-root=.
	New option -fm2-pathname-rootI.

gcc/m2/ChangeLog:

	PR modula2/121629
	* gm2-compiler/PathName.mod: Add copyright notice.
	* gm2-lang.cc (named_path): Add field lib_root.
	(push_back_Ipath): Set lib_root false.
	(push_back_lib_root): New function.
	(get_dir_sep_size): Ditto.
	(add_path_component): Ditto.
	(add_one_import_path): Ditto.
	(add_non_dialect_specific_path): Ditto.
	(foreach_lib_gen_import_path): Ditto.
	(get_module_source_dir): Ditto.
	(add_default_include_paths): Ditto.
	(assign_flibs): Ditto.
	(m2_pathname_root): Ditto.
	(add_m2_import_paths): Remove function.
	(gm2_langhook_post_options): Call assign_flibs.
	Check np.lib_root and call foreach_lib_gen_import_path.
	Replace call to add_m2_import_paths with a call to
	add_default_include_paths.
	(gm2_langhook_handle_option): Add case OPT_fm2_pathname_rootI_.
	* gm2spec.cc (named_path): Add field lib_root.
	(push_back_Ipath): Set lib_root false.
	(push_back_lib_root): New function.
	(add_m2_I_path): Add OPT_fm2_pathname_rootI_ option
	if np.lib_root.
	(lang_specific_driver): Add case OPT_fm2_pathname_root_.
	* lang.opt (fm2-pathname-root=): New option.
	(fm2-pathname-rootI=): Ditto.

gcc/testsuite/ChangeLog:

	PR modula2/121629
	* gm2/switches/pathnameroot/pass/switches-pathnameroot-pass.exp: New test.
	* gm2/switches/pathnameroot/pass/test.mod: New test.
	* gm2/switches/pathnameroot/pass/testlib/m2/foo.def: New test.
	* gm2/switches/pathnameroot/pass/testlib/m2/foo.mod: New test.

Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>

0 files changed, 0 insertions, 0 deletions