Current stable syslinux-4.05 does not build against linux-headers-3.4 (bug 417133). I am not sure if 4.06_pre* is ready to go stable yet.
*** Bug 424183 has been marked as a duplicate of this bug. ***
Should this bug be closed at this point? 4.05 is marked stable on amd64 and x86. Also, 4.06 is now out, which should solve the issues against the kernel headers. I have personally be using the 4.06_pre series, and haven't had issues with it (thought I don't use it extensively).
The summary says >4.05 I'll leave 4.06 in the tree for a few days and if there are no reports of breakage will add arches.
Ah, sorry, I had missed that. You can at least count me as it working (using pxelinux.0, vesamenu, linux.c32, vesamenu, hdt.c32).
Arches, please stabilize sys-boot/syslinux-4.06 Target keywords: amd64 x86
amd64 stable
x86 done, last arch. Closing!