[Bug preprocessor/42921] No error with missing header and -MM

[Bug preprocessor/42921] No error with missing header and -MM

[skannan at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42921

Shakthi Kannan <skannan at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |skannan at redhat dot com

--- Comment #3 from Shakthi Kannan <skannan at redhat dot com> 2013-05-08 05:30:25 UTC ---
Confirmed.

$ ./install/bin/gcc -MM -MF foo.d foo.c && echo succeeded || echo failed 
succeeded

$ ./install/bin/gcc -v
Using built-in specs.
COLLECT_GCC=./install/bin/gcc
COLLECT_LTO_WRAPPER=/home/mbuf/testing/gcc/42921/install/libexec/gcc/x86_64-unknown-linux-gnu/4.9.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc/configure --prefix=/home/mbuf/testing/gcc/42921/install
Thread model: posix
gcc version 4.9.0 20130507 (experimental) (GCC)

[Bug preprocessor/42921] No error with missing header and -MM

[rhansen at bbn dot com]

------- Comment #2 from rhansen at bbn dot com  2010-02-08 05:33 -------
Reopening; this is a different issue than bug 28435.

Chris Demetriou in bug 28435, comment 16 says:
> FWIW, I actually think that's a different issue (though certainly related).
>
> this bug was all about -MD and -MMD -- and what happens when an object file 
> needs to be output, but cannot be because of a missing include.
>
> AFAICT, that bug is all about, what should the handling of -MM be vs. 
> missing system headers.
>
> That having been said, I will note that with:
> gcc version 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)
>
> you get the results:
>
> [cgd@laptop tmp]$ echo "#include <does_not_exist.h>" > foo.c
> [cgd@laptop tmp]$ gcc -MM -MF foo.d foo.c && echo succeeded || echo failed
> foo.c:1:28: does_not_exist.h: No such file or directory
> failed
> [cgd@laptop tmp]$ echo '#include "does_not_exist.h"' > foo.c
> [cgd@laptop tmp]$ gcc -MM -MF foo.d foo.c && echo succeeded || echo failed
> foo.c:1:28: does_not_exist.h: No such file or directory
> failed
>
> So this certainly used to behave as the submitter of 42921 expected at 
> *some* point.
>
> As of 4.2.2 (the next version I have handy after 3.4.4) the first case 
> reported "succeeded" (and the second failed).
>
> --cgd


-- 

rhansen at bbn dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|DUPLICATE                   |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42921

[Bug preprocessor/42921] No error with missing header and -MM

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2010-02-07 20:33 -------


*** This bug has been marked as a duplicate of 28435 ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42921