[Bug libstdc++/14277] New: Dependency tracking of libstdc++ broken

["carlo at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

It seems that something is wrong with the dependency tracking of libstdc++.
I observed the following on a fully compiled source tree:

/usr/src/gcc/gcc-cvs-3.4-objdir>grep demangle.h
../gcc-cvs-3.4/libstdc++-v3/src/demangle.cc
#include <bits/demangle.h>
/usr/src/gcc/gcc-cvs-3.4-objdir>touch
../gcc-cvs-3.4/libstdc++-v3/include/bits/demangle.h
/usr/src/gcc/gcc-cvs-3.4-objdir>make all-target-libstdc++-v3 | grep demangle
/usr/src/gcc/gcc-cvs-3.4-objdir>

When I touch ../gcc-cvs-3.4/libstdc++-v3/src/demangle.cc itself,
the grep gives a lot of output: then demangle.cc is recompiled.

-- 
           Summary: Dependency tracking of libstdc++ broken
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: carlo at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14277