I tried compiling world for 1.2.x on 1.3.4-devel:
cc -g -O -pipe -mtune=pentiumpro -I. -I/usr/src-rel12/bin/csh -I/usr/src-rel12/bin/csh/../../contrib/tcsh
-D_PATH_TCSHELL='"/bin/csh"' -Wno-uninitialized -c tc.defs.c
cc -g -O -pipe -mtune=pentiumpro -I. -I/usr/src-rel12/bin/csh -I/usr/src-rel12/bin/csh/../../contrib/tcsh
-D_PATH_TCSHELL='"/bin/csh"' -Wno-uninitialized -c sh.exp.c
cc -g -O -pipe -mtune=pentiumpro -I. -I/usr/src-rel12/bin/csh -I/usr/src-rel12/bin/csh/../../contrib/tcsh
-D_PATH_TCSHELL='"/bin/csh"' -Wno-uninitialized -static -o csh sh.o sh.dir.o sh.dol.o sh.err.o sh.exec.o sh.char.o
sh.file.o sh.func.o sh.glob.o sh.hist.o sh.init.o sh.lex.o sh.misc.o sh.parse.o sh.print.o sh.proc.o sh.sem.o sh.set.o
sh.time.o glob.o mi.termios.o tw.help.o tw.init.o tw.parse.o tw.spell.o tw.comp.o tw.color.o ed.chared.o ed.defns.o
ed.init.o ed.inputl.o ed.refresh.o ed.screen.o ed.xmap.o ed.term.o tc.alloc.o tc.bind.o tc.const.o tc.disc.o tc.func.o
tc.os.o tc.printf.o tc.prompt.o tc.sched.o tc.sig.o tc.str.o tc.vers.o tc.who.o tc.defs.o sh.exp.o -ltermcap -lcrypt
cat /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set1 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set10
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set11 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set12
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set13 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set14
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set15 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set16
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set17 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set18
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set19 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set2
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set20 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set21
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set22 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set23
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set24 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set25
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set26 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set27
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set29 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set3
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set30 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set31
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set4 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set5
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set6 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set7
/usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set8 /usr/src-rel12/bin/csh/../../contrib/tcsh/nls/et/set9 >
et_EE.ISO8859-15.msg
gencat -new et_EE.ISO8859-15.cat et_EE.ISO8859-15.msg
gencat: illegal option -- n
usage: gencat catfile msgfile ...
*** Error code 1
Stop in /usr/src-rel12/bin/csh.
*** Error code 1
Stop in /usr/src-rel12.
*** Error code 1
Stop in /usr/src-rel12.
*** Error code 1
Stop in /usr/src-rel12.
11.494u 2.416s 0:16.01 86.8% 1459+770k 80+94io 1pf+0w
---
Isn't buildworld mostly self-hosting?
Tomaž