[Bug c/57653] filename information discarded when using -imacros

[allan at archlinux dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57653

--- Comment #19 from Allan McRae <allan at archlinux dot org> ---
That patch works.  With -imacros foo.h:

LC_ENTER  foo.c
LC_RENAME <command-line>
LC_ENTER  foo.h
LC_LEAVE  0x0
LC_ENTER  /usr/include/stdc-predef.h
LC_LEAVE  0x0
LC_RENAME foo.c
<- correct output
LC_LEAVE  0x0

All other combinations of -include/-imacros/-ffreestanding/no foo.h  all are
unchanged as expected.