http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57951
Bug ID: 57951
Summary: -MG doesn't work with -MD
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
Reporter: f.heckenb...@fh-soft.de
This was reported as Debian bug #593086 several years ago ...
% gcc -MD -MG foo.c
cc1: error: -MG may only be used with -M or -MM
(Contents of source file don't matter.)
According to the manual
`-MD' is equivalent to `-M -MF FILE', except that `-E' is not implied.
so I figure it should work. (It did in previous versions, e.g. 4.1.2)
There seems to be no work-around since "-M" implies "-E".
I guess the driver only needs to be told that "-MD" is also OK for "-MG" to
work since it implies "-M".
