Checking if your kit is complete...
Looks good
Writing Makefile for Devel::CCov
cp lib/Devel/CCov.pm blib/lib/Devel/CCov.pm
AutoSplitting blib/lib/Devel/CCov.pm (blib/lib/auto/Devel/CCov)
cp lib/Devel/CCov/ccov_registry.c blib/lib/Devel/CCov/ccov_registry.c
/home/cpanrun/tmp/5.10.0/bin/perl /home/cpanrun/build/5.10.0/lib/ExtUtils/xsubpp  -typemap /home/cpanrun/build/5.10.0/lib/ExtUtils/typemap  CCov.xs > CCov.xsc && mv CCov.xsc CCov.c
gcc -c   -D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DPRIVLIB_LAST_IN_INC -fno-strict-aliasing -pipe -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm -O2   -DVERSION=\"0.20\" -DXS_VERSION=\"0.20\" -fPIC "-I/home/cpanrun/build/5.10.0/lib/CORE"   CCov.c
CCov.xs: In function `XS_Devel__CCov_extract_balanced':
CCov.xs:292: `sv_undef' undeclared (first use in this function)
CCov.xs:292: (Each undeclared identifier is reported only once
CCov.xs:292: for each function it appears in.)
make: *** [CCov.o] Error 1
No tests defined for Devel::CCov extension.
Files found in blib/arch: installing files in blib/lib into architecture dependent library tree
Installing /home/cpanrun/build/5.10.0/site/lib/auto/Devel/CCov/CCov.so
Installing /home/cpanrun/build/5.10.0/site/lib/auto/Devel/CCov/CCov.bs
Installing /home/cpanrun/build/5.10.0/html/bin/ccovinstrument.html
Installing /home/cpanrun/build/5.10.0/site/lib/auto/Devel/CCov/autosplit.ix
Installing /home/cpanrun/build/5.10.0/site/lib/Devel/CCov.pm
Installing /home/cpanrun/build/5.10.0/site/lib/Devel/CCov/ccov_registry.c
Installing /home/cpanrun/build/5.10.0/site/man/man1/ccovinstrument.1
Installing /home/cpanrun/build/5.10.0/site/bin/ccovinstrument
Installing /home/cpanrun/build/5.10.0/site/bin/ccovanalyze
Appending installation info to /home/cpanrun/build/5.10.0/lib/perllocal.pod