[Bug preprocessor/36649] [4.3/4.4 Regression] -H option doesn't work as expected

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

------- Comment #1 from jakub at gcc dot gnu dot org  2008-07-29 20:46 -------
This is caused by http://gcc.gnu.org/ml/gcc-patches/2007-09/msg00396.html
patch, in particular changing line_table from a structure into a pointer into
GC allocated structure.  Although push_command_line_include sets
line_table->trace_includes to cpp_opts->print_include_names, after that when
the  *.gch file is read line_table will point to a different structure (the one
read
from the *.gch file) and thus it will use the -H vs. non-H setting from *.gch
compilation instead of the current compilation.

I don't know why line_table was changed into a pointer, but if that's needed,
I guess we want to save the line_table->trace_includes setting before reading
pch (or in push_command_line_include) and set it in the new structure after
PCH is read.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36649