cc -c  -I/opt/tools/sybase_oc/OCS-15_0/include -DSYB_LP64 -I/opt/tools/perl5.12.1/lib/site_perl/5.12.1/x86_64-linux/auto/DBI -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2   -DVERSION=\"1.10\" -DXS_VERSION=\"1.10\" -fPIC "-I/opt/tools/perl5.12.1/lib/5.12.1/x86_64-linux/CORE"   Sybase.c
Sybase.xs: In function `XS_DBD__Sybase__db__date_fmt':
Sybase.xs:76: error: `sv_yes' undeclared (first use in this function)
Sybase.xs:76: error: (Each undeclared identifier is reported only once
Sybase.xs:76: error: for each function it appears in.)
Sybase.xs:76: error: `sv_no' undeclared (first use in this function)