Warning:/usr/include/sys/statvfs.h or /usr/include/sys/statvfs.h
could not be found.

Assuming that you use use statvfs() ....
Checking if your kit is complete...
Looks good
Writing Makefile for Filesys::Statvfs
cp Df.pm blib\lib\Filesys\Df.pm
cp Statvfs.pm blib\lib\Filesys\Statvfs.pm
cp Statfs.pm blib\lib\Filesys\Statfs.pm
	D:\cpanrun\buNMAKE : fatal error U1077: 'cl' : return code '0x2'
Stop.
nrun\build\5-6-1\lib D:\cpanrun\build\5-6-1\lib\ExtUtils/xsubpp -prototypes -typemap D:\cpanrun\build\5-6-1\lib\ExtUtils\typemap -typemap typemap Statvfs.xs > Statvfs.xsc && D:\cpanrun\build\5-6-1\bin\perl.exe -Id:\cpanrun\build\5-6-1\lib -Id:\cpanrun\build\5-6-1\lib -MExtUtils::Command -e mv Statvfs.xsc Statvfs.c
	cl -c  -nologo -O1 -MD -Zi -DNDEBUG -DWIN32 -D_CONSOLE -DNO_STRICT -DHAVE_DES_FCRYPT -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DPERL_MSVCRT_READFIX -O1 -MD -Zi -DNDEBUG    -DVERSION=\"0.79\"  -DXS_VERSION=\"0.79\"  -ID:\cpanrun\build\5-6-1\lib\CORE  Statvfs.c
Statvfs.c
Statvfs.xs(8) : fatal error C1083: Cannot open include file: 'sys/statvfs.h': No such file or directory