libc5-altdev 5.4.46-15 (i386 binary) in ubuntu warty

The Linux C library version 5 (alternative dev files).
 Includes libc headers, kernel headers (v2.0.29) and static
 libraries. This package can be used to build libc5-base binaries
 even when the libc6-dev package is installed.
 .
 Please note that libc5 is obsolete and only needed for commercial
 applications. Bugs won't get fixed.