[gentoo-dev] TEXTRELs in assembly program

[Nekun <nekokun@firemail.cc>]

Hi all,

Working on the fasm ebuild, have some questions:

1. fasm is written on itself and has two variants: self-contained binary 
for x86 and amd64 and linked with libc only for x86. Also, there are 
tools for working with the proprietary symbolic information format which 
is libc-linked and only x86. So, I provide two USEs, fail in pkg_setup 
if we on amd64 host and hasn't multilib profile if they are set and link 
it with default CC with -m32. Not sure it's a 'clean' way, would be 
happy to get some clarification about handling such cases.

2. When running my ebuild, got two warnings: one about text relocations, 
other about executable stack. Second problem seems trivial, just apply 
patches which adds corresponding ELF sections. But the first one is not 
clear: I found that TEXTRELs occurs due to default '--pie' option passed 
to ld by gcc and seems like it isn't possible to remove default ld 
options (only add to), so I can construct ld commandline for linking 
with libc manually and resolve a bunch of corner cases... But is 
avoiding TEXTRELs in assembly programs really necessary? Performance 
issues in case of assembly-written assembler seems negligible... What's 
best according to ::gentoo policies?

See ebuild draft in attachment.