problem compiling with recent glibc

I have glibc-2.7 and get the following error:/

usr/src/partimage-ng/src/imager.cpp: In member function 'int
PartimageNG::Imager::readVec
tor(int, size_t)':
/usr/src/partimage-ng/src/imager.cpp:211: warning: comparison between signed and
unsignedinteger expressions
/usr/src/partimage-ng/src/imager.cpp: In member function 'int
PartimageNG::Imager::writeVector(int, size_t)':
/usr/src/partimage-ng/src/imager.cpp:234: warning: comparison between signed and
unsignedinteger expressions
/usr/src/partimage-ng/src/imager.cpp: In member function 'int
PartimageNG::Imager::savePartition(const char*, const char*)':
/usr/src/partimage-ng/src/imager.cpp:282: error: 'CODESET' was not declared in
this scope
/usr/src/partimage-ng/src/imager.cpp:282: error: 'nl_langinfo' was not declared in
this scope

the following change fixed the problem:

sed -i -e '/<fcntl.h>/ a\
#include <langinfo.h>
' src/imager.cpp