fails on first file from UNIX

make runtime
make[1]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
cd byterun; make all
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/byterun'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/byterun'
if test -f stdlib/libcamlrun.a; then :; else \
	  ln -s ../byterun/libcamlrun.a stdlib/libcamlrun.a; fi
make[1]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
make ocamlc
make[1]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
make[1]: `ocamlc' is up to date.
make[1]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
make ocamllex
make[1]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
cd yacc; make all
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/yacc'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/yacc'
cd lex; make all
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/lex'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/lex'
make[1]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
make ocamlyacc
make[1]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
cd yacc; make all
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/yacc'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/yacc'
make[1]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
make ocamltools
make[1]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
cd yacc; make all
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/yacc'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/yacc'
cd lex; make all
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/lex'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/lex'
cd tools; make all
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/tools'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/tools'
make[1]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
make library
make[1]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
cd stdlib; make all
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/stdlib'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/stdlib'
make[1]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
make ocaml
make[1]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
ocamlc  -linkall -o ocaml.tmp \
	  compilerlibs/ocamlcommon.cma compilerlibs/ocamlbytecomp.cma \
	  compilerlibs/ocamltoplevel.cma toplevel/topstart.cmo
byterun/ocamlrun ./expunge ocaml.tmp ocaml arg array arrayLabels buffer callback camlinternalLazy camlinternalMod camlinternalOO char complex digest filename format gc genlex hashtbl int32 int64 lazy lexing list listLabels map marshal moreLabels nativeint obj oo parsing pervasives printexc printf queue random scanf set sort stack stdLabels stream string stringLabels sys weak outcometree topdirs toploop
make[1]: byterun/ocamlrun: Command not found
make[1]: [ocaml] Error 127 (ignored)
rm -f ocaml.tmp
make[1]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
make otherlibraries ocamlbuild.byte  ocamldebugger \

make[1]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
cd yacc; make all
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/yacc'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/yacc'
cd lex; make all
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/lex'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/lex'
cd tools; make all
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/tools'
make[2]: Nothing to be done for `all'.
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/tools'
for i in win32unix str num dynlink bigarray; do \
	  (cd otherlibs/$i; make RUNTIME= all) || exit $?; \
	done
make[2]: Entering directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/otherlibs/win32unix'
i686-pc-mingw32-gcc -fno-defer-pop -Wall -D_FILE_OFFSET_BITS=64 -I../../byterun -O  -I../unix -c access.c
access.c:38:3: error: 'R_OK' undeclared here (not in a function)
   R_OK, W_OK, X_OK, F_OK
   ^
access.c:38:9: error: 'W_OK' undeclared here (not in a function)
   R_OK, W_OK, X_OK, F_OK
         ^
access.c:38:15: error: 'X_OK' undeclared here (not in a function)
   R_OK, W_OK, X_OK, F_OK
               ^
access.c:38:21: error: 'F_OK' undeclared here (not in a function)
   R_OK, W_OK, X_OK, F_OK
                     ^
access.c: In function 'unix_access':
access.c:46:3: warning: implicit declaration of function 'access' [-Wimplicit-function-declaration]
   ret = access(String_val(path), cv_flags);
   ^
make[2]: *** [access.o] Error 1
make[2]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03/otherlibs/win32unix'
make[1]: *** [otherlibraries] Error 2
make[1]: Leaving directory `/home/william/src/mxe/tmp-ocaml-core/ocaml-4.03'
make: *** [all] Error 2