Gerbil master failure on windows 10.

gistfile1.txt

[*] Building Gerbil
[*] Building gerbil stage0
>>> preparing /cygdrive/c/Users/merc/gerbil/bootstrap
>>> compiling runtime
/usr/lib/gcc/x86_64-pc-cygwin/7.3.0/../../../../lib/libcygwin.a(libcmain.o): In function `main':
/usr/src/debug/cygwin-2.10.0-1/winsup/cygwin/lib/libcmain.c:37: undefined reference to `WinMain'
/usr/src/debug/cygwin-2.10.0-1/winsup/cygwin/lib/libcmain.c:37:(.text.startup+0x94): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `WinMain'
collect2: error: ld returned 1 exit status
building gerbil/runtime in /cygdrive/c/Users/merc/gerbil/bootstrap/lib
... compile gx-gambc
>>> preparing bootstrap
sending incremental file list
gerbil/
gerbil/compiler.ssi
gerbil/compiler.ssxi.ss
gerbil/compiler__rt.scm
gerbil/core$_MOP_$_MOP_1___rt.scm
gerbil/core$_MOP_$_MOP_2___rt.scm
gerbil/core$_MOP_$_MOP_3___rt.scm
gerbil/core$_MOP___rt.scm
gerbil/core$_expander-runtime___rt.scm
gerbil/core$_host-runtime___rt.scm
gerbil/core$_match___rt.scm
gerbil/core$_module-sugar___rt.scm
gerbil/core$_more-sugar___rt.scm
gerbil/core$_more-syntax-sugar___rt.scm
gerbil/core$_r5rs-runtime___rt.scm
gerbil/core$_runtime___rt.scm
gerbil/core$_sugar_$_sugar_1___rt.scm
gerbil/core$_sugar_$_sugar_2___rt.scm
gerbil/core$_sugar_$_sugar_3___rt.scm
gerbil/core$_sugar___rt.scm
gerbil/core$_syntax-case___rt.scm
gerbil/core$_syntax-sugar___rt.scm
gerbil/core.ssi
gerbil/core.ssxi.ss
gerbil/core__1.scm
gerbil/core__10.scm
gerbil/core__11.scm
gerbil/core__12.scm
gerbil/core__13.scm
gerbil/core__14.scm
gerbil/core__15.scm
gerbil/core__2.scm
gerbil/core__3.scm
gerbil/core__4.scm
gerbil/core__5.scm
gerbil/core__6.scm
gerbil/core__7.scm
gerbil/core__8.scm
gerbil/core__9.scm
gerbil/core__rt.scm
gerbil/expander.ssi
gerbil/expander.ssxi.ss
gerbil/expander__rt.scm
gerbil/gambit.ssi
gerbil/gambit__rt.scm
gerbil/compiler/
gerbil/compiler/base.ssi
gerbil/compiler/base.ssxi.ss
gerbil/compiler/base__0.scm
gerbil/compiler/base__1.scm
gerbil/compiler/base__rt.scm
gerbil/compiler/compile.ssi
gerbil/compiler/compile.ssxi.ss
gerbil/compiler/compile__0.scm
gerbil/compiler/compile__1.scm
gerbil/compiler/compile__rt.scm
gerbil/compiler/driver.ssi
gerbil/compiler/driver.ssxi.ss
gerbil/compiler/driver__0.scm
gerbil/compiler/driver__rt.scm
gerbil/compiler/optimize-ann.ssi
gerbil/compiler/optimize-ann.ssxi.ss
gerbil/compiler/optimize-ann__0.scm
gerbil/compiler/optimize-ann__rt.scm
gerbil/compiler/optimize-base.ssi
gerbil/compiler/optimize-base.ssxi.ss
gerbil/compiler/optimize-base__0.scm
gerbil/compiler/optimize-base__1.scm
gerbil/compiler/optimize-base__rt.scm
gerbil/compiler/optimize-call.ssi
gerbil/compiler/optimize-call.ssxi.ss
gerbil/compiler/optimize-call__0.scm
gerbil/compiler/optimize-call__rt.scm
gerbil/compiler/optimize-top.ssi
gerbil/compiler/optimize-top.ssxi.ss
gerbil/compiler/optimize-top__0.scm
gerbil/compiler/optimize-top__1.scm
gerbil/compiler/optimize-top__rt.scm
gerbil/compiler/optimize-xform.ssi
gerbil/compiler/optimize-xform.ssxi.ss
gerbil/compiler/optimize-xform__0.scm
gerbil/compiler/optimize-xform__rt.scm
gerbil/compiler/optimize.ssi
gerbil/compiler/optimize.ssxi.ss
gerbil/compiler/optimize__0.scm
gerbil/compiler/optimize__1.scm
gerbil/compiler/optimize__rt.scm
gerbil/compiler/ssxi.ssi
gerbil/compiler/ssxi.ssxi.ss
gerbil/compiler/ssxi__1.scm
gerbil/compiler/ssxi__rt.scm
gerbil/expander/
gerbil/expander/common.ssi
gerbil/expander/common.ssxi.ss
gerbil/expander/common__1.scm
gerbil/expander/common__rt.scm
gerbil/expander/compile.ssi
gerbil/expander/compile.ssxi.ss
gerbil/expander/compile__0.scm
gerbil/expander/compile__rt.scm
gerbil/expander/core.ssi
gerbil/expander/core.ssxi.ss
gerbil/expander/core__0.scm
gerbil/expander/core__1.scm
gerbil/expander/core__rt.scm
gerbil/expander/module.ssi
gerbil/expander/module.ssxi.ss
gerbil/expander/module__0.scm
gerbil/expander/module__1.scm
gerbil/expander/module__rt.scm
gerbil/expander/root.ssi
gerbil/expander/root.ssxi.ss
gerbil/expander/root__0.scm
gerbil/expander/root__rt.scm
gerbil/expander/stx.ssi
gerbil/expander/stx.ssxi.ss
gerbil/expander/stx__0.scm
gerbil/expander/stx__1.scm
gerbil/expander/stx__rt.scm
gerbil/expander/stxcase.ssi
gerbil/expander/stxcase.ssxi.ss
gerbil/expander/stxcase__0.scm
gerbil/expander/stxcase__1.scm
gerbil/expander/stxcase__rt.scm
gerbil/expander/top.ssi
gerbil/expander/top.ssxi.ss
gerbil/expander/top__0.scm
gerbil/expander/top__rt.scm
gerbil/gambit/
gerbil/gambit/bits.ssi
gerbil/gambit/bits__rt.scm
gerbil/gambit/bytes.ssi
gerbil/gambit/bytes__1.scm
gerbil/gambit/bytes__rt.scm
gerbil/gambit/continuations.ssi
gerbil/gambit/continuations__rt.scm
gerbil/gambit/exact.ssi
gerbil/gambit/exact__0.scm
gerbil/gambit/exact__1.scm
gerbil/gambit/exact__rt.scm
gerbil/gambit/exceptions.ssi
gerbil/gambit/exceptions__rt.scm
gerbil/gambit/fixnum.ssi
gerbil/gambit/fixnum__rt.scm
gerbil/gambit/flonum.ssi
gerbil/gambit/flonum__rt.scm
gerbil/gambit/foreign.ssi
gerbil/gambit/foreign__rt.scm
gerbil/gambit/hash.ssi
gerbil/gambit/hash__rt.scm
gerbil/gambit/hvectors.ssi
gerbil/gambit/hvectors__rt.scm
gerbil/gambit/misc.ssi
gerbil/gambit/misc__rt.scm
gerbil/gambit/os.ssi
gerbil/gambit/os__rt.scm
gerbil/gambit/ports.ssi
gerbil/gambit/ports__0.scm
gerbil/gambit/ports__rt.scm
gerbil/gambit/random.ssi
gerbil/gambit/random__0.scm
gerbil/gambit/random__rt.scm
gerbil/gambit/readtables.ssi
gerbil/gambit/readtables__rt.scm
gerbil/gambit/system.ssi
gerbil/gambit/system__rt.scm
gerbil/gambit/threads.ssi
gerbil/gambit/threads__0.scm
gerbil/gambit/threads__rt.scm

sent 4,976,562 bytes  received 3,183 bytes  3,319,830.00 bytes/sec
total size is 4,964,961  speedup is 1.00
>>> compiling gerbil core
/usr/lib/gcc/x86_64-pc-cygwin/7.3.0/../../../../lib/libcygwin.a(libcmain.o): In function `main':
/usr/src/debug/cygwin-2.10.0-1/winsup/cygwin/lib/libcmain.c:37: undefined reference to `WinMain'
/usr/src/debug/cygwin-2.10.0-1/winsup/cygwin/lib/libcmain.c:37:(.text.startup+0x94): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `WinMain'
collect2: error: ld returned 1 exit status
... compile /cygdrive/c/Users/merc/gerbil/bootstrap/lib/gerbil/compiler/base__0.scm
*** ERROR; build failed