Subject: bug#34409: 27.0.50; Cygw32 build break

From: Kazuhiro Ito <[email-masked]>
Date: Sun, 10 Feb 2019 13:21:27 +0900

Cygw32 build is failed on trunk.

$ ./configure --with-w32
$ make

(snip)
emacs.o:emacs.c:(.text.startup+0x1a6): undefined reference to `init_heap'
emacs.o:emacs.c:(.text.startup+0x1a6): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `init_heap'
emacs.o:emacs.c:(.text.startup+0x389): undefined reference to `init_heap'
emacs.o:emacs.c:(.text.startup+0x389): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `init_heap'
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:634: temacs.in.exe] Error 1
make[1]: Leaving directory '/dfs/f/build/cygwin64/emacs/src'
make: *** [Makefile:423: src] Error 2

init_heap function is defined in w32heap.c, which is not compiled on
Cygwin buid.

-- 
Kazuhiro Ito