id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
3262,Boost::Accumulators::Statistics: Unused Globals Cause Warnings/Errors When Headers Are Not in System Path,gerickson@…,Eric Niebler,"I've recently added Boost 1.39.0 to an Xcode 3.1.3 project with the following warnings enabled in GCC/G++ 4.0.1:

-Werror -Wreturn-type -Wunused-function -Wunused-label -Wunused-variable -Wshadow

Unfortunately, when boost is not installed in a ""system"" path--as is the case here--unused and shadow variable warnings cause the build to fail when warnings are treated as errors. This issue last came up for me about a year ago in 1_35_0 with filesystem.hpp:

 http://article.gmane.org/gmane.comp.lib.boost.user/38297/match=shadow+variables+cause

The included headers this time are:

boost/accumulators/statistics/mean.hpp
boost/accumulators/statistics/sum.hpp

To test and fix, I isolated with:

printf ""#include <${BoostHeader}>\nint main(void) { return 0; }"" | /Developer/usr/bin/gcc-4.0 -x c++ -Wall -Wshadow -Werror -o test -I${BoostRoot}/boost/include -

The patches to address this are attached and impact the headers below:

boost/accumulators/statistics/mean.hpp
boost/accumulators/statistics/sum.hpp

Because this problem seems to come up frequently, perhaps there is a way -Wshadow and -Wall can be forced for all unit tests?",Bugs,closed,To Be Determined,accumulator,Boost 1.39.0,Problem,fixed,,