building libm fails for vax

[Kurt Lidl <lidl%pix.net@localhost>]

Building a tree from yesterday's sources, fails
for the vax:

dependall ===> lib/libm
#    create  libm/cpow.d
CC=/nbsd/obj/vax/tools/bin/vax--netbsdelf-gcc /nbsd/obj/vax/tools/bin/nbmkdep 
-f cpow.d --      -DLIBM_SCCS -I/nbsd/head/src/lib/libm/gen  -nostdinc -isystem 
/nbsd/obj/vax/nbuild/usr/include  /nbsd/head/src/lib/libm/complex/cpow.c
#    create  libm/cpowf.d
CC=/nbsd/obj/vax/tools/bin/vax--netbsdelf-gcc /nbsd/obj/vax/tools/bin/nbmkdep 
-f cpowf.d --      -DLIBM_SCCS -I/nbsd/head/src/lib/libm/gen  -nostdinc 
-isystem /nbsd/obj/vax/nbuild/usr/include  
/nbsd/head/src/lib/libm/complex/cpowf.c
#    create  libm/cproj.d
CC=/nbsd/obj/vax/tools/bin/vax--netbsdelf-gcc /nbsd/obj/vax/tools/bin/nbmkdep 
-f cproj.d --      -DLIBM_SCCS -I/nbsd/head/src/lib/libm/gen  -nostdinc 
-isystem /nbsd/obj/vax/nbuild/usr/include  
/nbsd/head/src/lib/libm/complex/cproj.c
/nbsd/head/src/lib/libm/complex/cproj.c:33:26: error: machine/ieee.h: No such 
file or directory
nbmkdep: compile failed.

*** Failed target:  cproj.d
*** Failed command: CC=/nbsd/obj/vax/tools/bin/vax--netbsdelf-gcc 
/nbsd/obj/vax/tools/bin/nbmkdep -f cproj.d -- -DLIBM_SCCS 
-I/nbsd/head/src/lib/libm/gen -nostdinc -isystem 
/nbsd/obj/vax/nbuild/usr/include /nbsd/head/src/lib/libm/complex/cproj.c
*** Error code 1

Stop.
nbmake: stopped in /nbsd/head/src/lib/libm

*** Failed target:  dependall-libm

(Cross-building on a amd64 class machine, running FreeBSD 8.1, but
I don't think it matters.  I've successfully compiled for the vax
on this build host before, and installed the resulting build into
a simh vax simulator.)

-Kurt