* cpphash.h (struct cpp_buffer): Restore return_at_eof field. This
partly reverts my 2003-10-01 change, because we're back to logically
including <command line> inside the main line.
* cpplex.c (_cpp_get_fresh_line): Check return_at_eof field.
* cppmacro.c (cpp_scan_nooutput): Set return_at_eof of current buffer.
Fixes PR preprocessor/14103.
* cppfiles.c (_cpp_stack_include): When appropriate decrement
line_table's highest_location, fixing LAST_SOURCE_LINE_LOCATION.
(cpp_push_include): Don't need to increment pfile's line field.
* line-map.h (LAST_SOURCE_LINE_LOCATION): Only decrement by 1.
* c-ppoutput.c (print struct): New first_time field.
(init_pp_output): Set print.first_time.
(pp_file_change): Use print.first_time, rather than MAIN_FILE_P,
which is set also for (say) <command line>. Clear print.first_time.
* cppfiles.c (struct _cpp_file): Comment and type for pch field
does not match the code, so fix both.
(should_stack_file): Inline include_pch_p function.
(include_pch_p): Remove pointless function.
* cpphash.h (struct cpp_buffer): Remove unused search_cached field.
From-SVN: r78049
