Cstring is located in:
C/src/LINUX/Cstring.i3
C/src/VAX/Cstring.i3
C/src/SEQUENT/Cstring.i3
C/src/IRIX5/Cstring.i3
C/src/LINUXELF/Cstring.i3
C/src/NEXT/Cstring.i3
C/src/NT386/Cstring.i3
C/src/ALPHA_OSF/Cstring.i3
C/src/OKI/Cstring.i3
C/src/IBMR2/Cstring.i3
C/src/HPPA/Cstring.i3
C/src/HP300/Cstring.i3
C/src/FreeBSD2/Cstring.i3
C/src/FreeBSD/Cstring.i3
C/src/DS3100/Cstring.i3
C/src/ARM/Cstring.i3
C/src/AP3000/Cstring.i3
C/src/IBMRT/Cstring.i3
C/src/AIX386/Cstring.i3
C/src/SUN3/Cstring.i3
C/src/SOLsun/Cstring.i3
C/src/UMAX/Cstring.i3
C/src/SUN386/Cstring.i3
C/src/SOLgnu/Cstring.i3
C/src/SPARC/Cstring.i3