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Date: Sun, 18 May 2014 12:24:12 -0700 (PDT)
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Subject: Re: Pretest version 24.3.91 of GNU Emacs is available
From: RayeR <glaux AT centrum DOT cz>
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I tried it to compile just for fun (dj2.04, gcc4.8.2, WXP) but failed linking with missing va_copy function:

gcc -Demacs  -I. -I../lib           -O2   -s  \
  -o temacs  vm-limit.o dispnew.o frame.o scroll.o xdisp.o menu.o xmenu.o window
.o charset.o coding.o category.o ccl.o character.o chartab.o bidi.o cm.o term.o
terminal.o xfaces.o    emacs.o keyboard.o macros.o keymap.o sysdep.o buffer.o fi
lelock.o insdel.o marker.o minibuf.o fileio.o dired.o cmds.o casetab.o casefiddl
e.o indent.o search.o regex.o undo.o alloc.o data.o doc.o editfns.o callint.o ev
al.o floatfns.o fns.o font.o print.o lread.o syntax.o unexcoff.o bytecode.o proc
ess.o gnutls.o callproc.o region-cache.o sound.o atimer.o doprnt.o intervals.o t
extprop.o composite.o xml.o  profiler.o decompress.o dosfns.o msdos.o w16select.
o         termcap.o tparam.o lastfile.o gmalloc.o ralloc.o    ../lib/libgnu.a
                                  -lm
doprnt.o:doprnt.c:(.text+0xad5): undefined reference to `va_copy'
collect2.exe: error: ld returned 1 exit status
Makefile:231: recipe for target 'temacs.exe' failed
make.exe[1]: *** [temacs.exe] Error 1
make.exe[1]: Leaving directory 'n:/emacs-24.3.91/src'
Makefile:105: recipe for target 'src' failed
make.exe: *** [src] Error 2

I cannot find it in headers, only similar occurence but with prefixes is in cross-st.h
#define __ms_va_copy(__d,__s) __builtin_ms_va_copy(__d,__s)
...