Building m4 fails under Interix-3.5

[Aleksey Cheusov <cheusov%tut.by@localhost>]

m4 required by autoconf fails under Interix-3.5

===> Building for m4-1.4.12
...
fatal-signal.c: In function `install_handlers':
fatal-signal.c:189: error: `SA_NODEFER' undeclared (first use in this function)
fatal-signal.c:189: error: (Each undeclared identifier is reported only once
fatal-signal.c:189: error: for each function it appears in.)
*** Error code 1



   0 ~>grep SA_ /usr/include/*                           
   /usr/include/signal.h:#define SA_NOCLDSTOP 0x00000001
   /usr/include/signal.h:#define SA_RESTART   0x00000002
   /usr/include/signal.h:#define SA_RESETHAND   0x00000004

   0 ~>

-- 
Best regards, Aleksey Cheusov.