The content of doc/distrib.txt (release 3.72):
For creators of Linux distributions:
SYSLINUX is a notoriously hard program to debug, since it runs outside of any operating system, and has a tendency to expose BIOS and hardware bugs on various systems. Therefore, I would appreciate if you would resist the temptation of recompiling the SYSLINUX bootloader itself (ldlinux.asm) if at all possible. If you do that, I will have to refer any bug reports I receive back to the respective distributor.
However, I have no such concerns about recompiling the installer programs, and in fact, with both libc 5 and libc 6 in common use in the Linux world today I understand if you wish to relink the Linux-based installer against your system version of libc. Therefore a special makefile targets "make installer" has been included with the SYSLINUX distribution, starting with version 1.42.
To rebuild the installer programs *only*, starting from a freshly untarred distribution copy of SYSLINUX, do:
make clean make installer
If you want to remove all intermediate files, including the ones obtained from assembling ldlinux.asm and which are included in the distribution, do "make spotless".
I appreciate your assistance in this matter.
- H. Peter Anvin