jh@evans:/abuild/jh/mozilla-central/build6/gfx/harfbuzz/src>
/abuild/jh/trunk-install/bin/gcc  -O2 -fwhopr  -r -nostdlib hb-blob.i -c
jh@evans:/abuild/jh/mozilla-central/build6/gfx/harfbuzz/src>
/abuild/jh/trunk-install/bin/g++  -O2 -fwhopr  -r -nostdlib *.ii -c
jh@evans:/abuild/jh/mozilla-central/build6/gfx/harfbuzz/src>
/abuild/jh/trunk-install/bin/g++ hb-blob.o -O2 -fwhopr  -r -nostdlib hb-font.o
../../../../gfx/harfbuzz/src/hb-blob-private.h:53:60: warning: type of
‘_hb_blob_nil’ does not match original declaration [enabled by default]
../../../../gfx/harfbuzz/src/hb-blob.c:45:11: note: previously declared here


-- 
           Summary: Invalid type mismatches while merging C and C++ sources
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hubicka at gcc dot gnu dot org
  GCC host triplet: x86_64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44871