-current not building: libsupc++4/guard

["Steven M. Bellovin" <smb%cs.columbia.edu@localhost>]

#   compile  libsupc++4/guard.o
/usr/BUILD/tools/bin/i386--netbsdelf-c++ -O2 -Werror -ffunction-sections 
-fdata-sections  -nostdinc++ -cxx-isystem /usr/BUILD/netbsd/usr/include/g++  
-I/usr/src/gnu/dist/gcc4/gcc -I/usr/src/gnu/dist/gcc4/include 
-I/usr/src/gnu/dist/gcc4/libstdc++-v3/libsupc++ 
-I/usr/src/gnu/lib/libsupc++4/../libstdc++-v3_4/arch/i386 -I. -DHAVE_STDLIB_H 
-DHAVE_STRING_H   -nostdinc -isystem /usr/BUILD/netbsd/usr/include -c    
/usr/src/gnu/dist/gcc4/libstdc++-v3/libsupc++/guard.cc -o guard.o
/usr/src/gnu/dist/gcc4/libstdc++-v3/libsupc++/guard.cc:64: error: 
'_PTHREAD_MUTEX_RECURSIVE_INITIALIZER_NP' was not declared in this scope




                --Steve Bellovin, http://www.cs.columbia.edu/~smb