re PR c/39556 (statics in C99 inline functions later declared extern)

re PR c/39556 (statics in C99 inline functions later declared extern)

	PR c/39556
	* c-tree.h (enum c_inline_static_type): New.
	(record_inline_static): Declare.
	* c-decl.c (struct c_inline_static, c_inline_statics,
	record_inline_static, check_inline_statics): New.
	(pop_file_scope): Call check_inline_statics.
	(start_decl): Call record_inline_static instead of pedwarning
	directly for static in inline function.
	* c-typeck.c (build_external_ref): Call record_inline_static
	instead of pedwarning directly for static referenced in inline
	function.

testsuite:
	* gcc.dg/inline-34.c: New test.

From-SVN: r146800