Warnings with libstdc++ build

[Nate Lawson]

My /etc/make.conf is empty.

c++ -pg -O -pipe -mcpu=pentiumpro -DIN_GLIBCPP_V3 -DHAVE_CONFIG_H -I/home/src/gnu/lib/libstdc++ -I/home/src/gnu/lib/libstdc++/../../../contrib/libstdc++/libsupc++ -I/home/src/gnu/lib/libstdc++/../../../contrib/gcc -fno-implicit-templates -ffunction-sections -fdata-sections -Wno-deprecated -c

/home/src/contrib/libstdc++/libsupc++/tinfo.cc -o tinfo.po cc1plus:
warning: -ffunction-sections disabled; it makes profiling impossible

-Nate