substitute with sed, the way bfd's Makefile does

[Parth]

find_replace.zig was 31 lines doing a literal string replace, standing in for what bfd's own Makefile runs:

elf32-target.h : elfxx-target.h
	sed -e s/NN/32/g < $(srcdir)/elfxx-target.h > elf32-target.new

On all thirteen substitutions this port makes — the seven elfxx-*.h pairs and the six peXXigen.c variants — the two agree byte for byte.

genscripts.zig already spawns the host's sh, and the script it runs uses the host's sed, cat, mkdir and rm to write every ldscripts/*.x. So sed here is not a new kind of dependency, only a more visible one.

[Parth]

Opened by mistake against the wrong repo — this belongs on a fork. Closing; apologies for the noise.