[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 #11 from Allan McRae <allan at archlinux dot org> ---
Created attachment 30345
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30345&action=edit
log of gdb session

Here is the log from my gdb session.

Arch builds with no patches, just a could of small sed lines that should not
affect this.  See our build script (plain bash):
https://projects.archlinux.org/svntogit/packages.git/tree/trunk/PKGBUILD?h=packages/gcc

Since it is also in Fedora rawhide, hopefully someone there can confirm.