gcc/libstdc++-v3/include/c_global
..
cassert
ccomplex
cctype
cerrno
cfenv
cfloat
cinttypes
ciso646
climits
clocale
cmath
cmath.tcc
csetjmp
csignal
cstdarg
cstdatomic
cstdbool
cstddef
cstdint
cstdio
cstdlib
cstring
ctgmath
ctime
cwchar
cwctype