From: Stephan T. Lavavej (stl_at_[hidden])
Date: 2006-03-20 05:02:41
Hi,
Boost 1.33.1 contains a number of constructs which cause warnings when
compiled with GCC 3.4.2 (and other versions) using some warning flags. The
majority of warnings are -Wshadow warnings and are easily correctable. One
is a C cast that should be written as a const_cast. The most severe one is
an omission of "const" that produces a warning under -Wcast-qual.
I maintain a local patch that fixes these things (as otherwise I can't use
these warning flags on my own code), but it'd be really nice if they were
fixed in Boost mainline. The C cast and -Wcast-qual problems have obvious
fixes. My fixes for the -Wshadow warnings involve prepending x_ to variable
names, since I don't need to be inventive. Better names should probably be
chosen.
I reported these problems against 1.33.0, but they appeared unchanged in
1.33.1.
My patch is here: http://stl.nuwen.net/boost-1.33.1.patch
* The following files have shadow warnings:
boost/date_time/gregorian/gregorian_io.hpp
boost/date_time/period_formatter.hpp
boost/date_time/time_duration.hpp
boost/date_time/time_system_counted.hpp
boost/format/format_implementation.hpp
boost/regex/v4/basic_regex_creator.hpp
boost/regex/v4/match_results.hpp
* This file has shadow warnings, and a redundant typedef that causes a
shadow warning:
boost/regex/v4/basic_regex_parser.hpp
* This file has a C cast that should be a const_cast:
boost/range/detail/implementation_help.hpp
* This file omits a "const", which causes a nasty -Wcast-qual warning:
boost/token_iterator.hpp
The omission of the const is not intentional, if you look at the template
carefully.
The warning that this generates is here:
http://stl.nuwen.net/boost-warning.txt
* This file says "bash" when it should say "sh". MSYS bash appears under
"sh" but not "bash". This is really minor, since in 1.33.1 I don't even need
to execute gcc_gen.sh, but it'd be nice to have it fixed.
libs/regex/build/gcc_gen.sh
Finally, Boost Regex's gcc.mak causes problems for MinGW MSYS. It really
doesn't like trailing slashes. The patch for this is here:
http://stl.nuwen.net/boost-1.33.1-gcc.mak.patch
I believe that other systems don't require trailing slashes, but I'm not
sure. (I am only concerned with the -I../../../ here; the optimization
settings are purely for myself and should not be put into mainline.)
Thanks!
Stephan T. Lavavej