[Bug preprocessor/15220] New: [3.4 regression] "gcc -E -MM -MG" reports missing system headers in source directory

[prj-bugzilla-gcc at multivac dot cwru dot edu]

$ gcc -v
Reading specs from
/fs/pkgs/mount/package/misc/spf/gcc-3.4.0/bin/../lib/gcc/i686-pc-linux-gnu/3.4.0/specs
Configured with: ../gcc-3.4.0/configure --prefix=/package/misc/spf/gcc-3.4.0
--disable-nls --enable-libgcj --with-as=/package/misc/spf/gcc-3.4.0/spf/as
--with-ld=/package/misc/spf/gcc-3.4.0/spf/ld --enable-threads
Thread model: posix
gcc version 3.4.0

$ echo $'#include <foo.h>\n#include "bar.h"' | gcc -xc /dev/stdin -E -MM -MG
stdin.o: /dev/stdin foo.h bar.h

Previous versions of gcc (I checked 2.95.3, 3.2.3, and 3.3.3) do not include
foo.h in the output, which is appropriate, since foo.h would not be searched for
in the source directory when actually compiling the file.

Jim Wilson has some ideas:
http://gcc.gnu.org/ml/gcc/2004-04/msg01413.html

-- 
           Summary: [3.4 regression] "gcc -E -MM -MG" reports missing system
                    headers in source directory
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: preprocessor
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: prj-bugzilla-gcc at multivac dot cwru dot edu
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15220