PR preprocessor/36649
* files.c (struct report_missing_guard_data): New type.
(report_missing_guard): Put paths into an array instead of printing
them right away. Return 1 rather than 0.
(report_missing_guard_cmp): New function.
(_cpp_report_missing_guards): Sort and print paths gathered by
report_missing_guard callback.
* gcc.dg/pch/cpp-3.hs: Add include guards.
* gcc.dg/pch/cpp-3a.h: Likewise.
* gcc.dg/pch/cpp-3b.h: Likewise.
* gcc.dg/cpp/mi8.c: New test.
* gcc.dg/cpp/mi8a.h: New file.
* gcc.dg/cpp/mi8b.h: New file.
* gcc.dg/cpp/mi8c.h: New file.
* gcc.dg/cpp/mi8d.h: New file.
From-SVN: r138432
affa55c67f