re PR libfortran/22298 (libgfortran init() constructor isn't called if executable is statically linked)

	PR libfortran/22298

	* runtime/main.c (stupid_function_name_for_static_linking): New
	function.
	* runtime/error.c (internal_error): Call
	stupid_function_name_for_static_linking.
	* libgfortran.h: Add prototype for
	stupid_function_name_for_static_linking.

	* gcc/testsuite/lib/target-supports.exp
	(check_effective_target_static_libgfortran): New
	static_libgfortran effective target.
	* gcc/testsuite/gfortran.dg/static_linking_1.f: New test.
	* gcc/testsuite/gfortran.dg/static_linking_1.c: New file.

From-SVN: r106484