Makefile not writing files to /usr/local/lib/ in cygwin - makefile

Question

I ran a particular Makefile on my Lubuntu machine, and it created a couple directories of files in my /usr/local/lib directory.
Tonight I'm trying to create a similar setup in a cygwin window on my Windows 10 machine. Same Makefile, but the /usr/local/lib directory ends up empty. So when I run a different Makefile later on that wants to call these /usr/local/lib libraries, it fails.
What could I be doing wrong? Is there an environment variable that needs to be set such that the /usr/loal/lib directory can be written to during the make?
Thanks.
Update: I just figured out that I can install Ubuntu as an application in Windows https://www.howtogeek.com/249966/how-to-install-and-use-the-linux-bash-shell-on-windows-10/ , and my makefile install is working great now. No problems at all, so it appears to be a cygwin problem only. That being said, here is my make file:
#! /usr/bin/make -f
# -*- make -*-
#
# Main gcc Makefile.
# This makefile is maintained by Greg King <greg.king4#verizon.net>.
# Goals that are supported by the cc65 package
.PHONY: all bins libs docs samples tests clean zap
.PHONY: uninstall install install-bins install-libs install-docs install-samps
# If SYS is defined on this makefile's command-line, then we want it to go
# to "samples" and "tests", but not to the other rules. So, we disable a
# feature of GNU make that would have given ${SYS} to every sub-make.
#MAKEOVERRIDES=
# (That trick has been disabled.)
# To compile with custom make-options, set them here; for example:
#MAKEOPTS = -j 2 CFLAGS=-O4 CC=clang
MAKEOPTS =
# The install prefix and directories
prefix = /usr/local
exec_prefix = $(prefix)
bindir = $(exec_prefix)/bin
datadir = $(prefix)/share
docdir = $(datadir)/doc
libdir = $(exec_prefix)/lib
CC65_DOC = $(docdir)/cc65
CC65_HOME = $(libdir)/cc65
CA65_INC = $(CC65_HOME)/asminc
CC65_INC = $(CC65_HOME)/include
LD65_CFG = $(CC65_HOME)/cfg
LD65_LIB = $(CC65_HOME)/lib
LD65_OBJ = $(CC65_HOME)/obj
# Programs
MKDIR = mkdir -m 755
# BSD-like install-script/-program
INSTALL = make/install-sh
INSTALL_DATA = $(INSTALL) -c -m 644
INSTALL_PROG = $(INSTALL) -c -m 755
INSTALL_STRIP = $(INSTALL_PROG) -s
# This file-name extension is needed on DOS/Windows systems.
ifdef COMSPEC
EXT = .exe
endif
# Rules
# The sample and library-test programs must be compiled for only one platform
# at a time. So, those rules are done automatically only when a user names
# a system on the command-line. (A user can do those rules with their
# defaults by putting "all samples tests" on the command-line.)
#
all: bins libs docs $(SYS:%=samples tests)
bins:
#$(MAKE) -C src -f make/gcc.mak $(MAKEOPTS) \
CA65_INC=\\\"${CA65_INC}/\\\" CC65_INC=\\\"${CC65_INC}/\\\" \
LD65_CFG=\\\"${LD65_CFG}/\\\" LD65_LIB=\\\"${LD65_LIB}/\\\" \
LD65_OBJ=\\\"${LD65_OBJ}/\\\"
libs:
#$(MAKE) -C libsrc
# This rule won't try to generate HTML files
# if a host system doesn't have LinuxDoc Tools.
docs:
#if linuxdoc -B check doc/index >/dev/null 2>&1; \
then $(MAKE) -C doc $(MAKEOPTS) html; \
else echo '"LinuxDoc Tools" is not installed; skipping HTML documentation.'; \
fi
# Some platforms cannot compile all of the sample and library-test programs.
# So, these rules ignore errors.
samples:
-#$(MAKE) -k -C samples prefix=$(prefix) $(SYS:%=SYS=%)
tests:
-#$(MAKE) -k -C testcode/lib prefix=$(prefix) $(SYS:%=SYS=%)
clean zap:
#$(MAKE) -C src -f make/gcc.mak $#
#$(MAKE) -C libsrc $#
#$(MAKE) -C doc $#
#$(MAKE) -C samples $#
# #$(MAKE) -C testcode/lib $# $(SYS:%=SYS=%)
uninstall: install-test
cd $(bindir) && $(RM) ar65${EXT} ca65${EXT} cc65${EXT} cl65${EXT} \
co65${EXT} da65${EXT} ld65${EXT} od65${EXT} grc65${EXT} ca65html
$(RM) -R $(CC65_HOME) $(CC65_DOC)
install: install-test install-dirs install-bins install-libs install-docs
#echo
#echo 'If you installed the files into non-default directories, then'
#echo 'you might need to export some shell environment variables:'
#echo
#echo 'CC65_HOME=$(CC65_HOME)'
#echo ' or'
#echo 'CA65_INC=$(CA65_INC)'
#echo 'CC65_INC=$(CC65_INC)'
#echo 'LD65_CFG=$(LD65_CFG)'
#echo 'LD65_LIB=$(LD65_LIB)'
#echo 'LD65_OBJ=$(LD65_OBJ)'
#echo
#if [ -x $(bindir)/grc${EXT} ]; then \
echo 'grc was renamed to grc65; but, a grc command is in your binaries directory.'; \
echo "If that command is an old copy of CC65's program,"; \
echo 'then you should use a "${MAKE} erase-grc" command to remove it.'; \
fi
.PHONY: install-test
install-test:
#if [ `id -u` != 0 ]; then \
echo; \
echo 'If you are denied permission to install or uninstall this package,'; \
echo 'then you will need to do "make/gcc.mak install" or "make/gcc.mak uninstall"'; \
echo 'as either the root user or an administrator.'; \
echo; \
fi 2>/dev/null
.PHONY: install-dirs
install-dirs: $(bindir) $(datadir) $(docdir) $(libdir) \
$(CC65_DOC) $(CC65_HOME) \
$(CA65_INC) $(CC65_INC) \
$(CC65_INC)/em $(CC65_INC)/geos $(CC65_INC)/joystick \
$(CC65_INC)/mouse $(CC65_INC)/sys $(CC65_INC)/tgi \
$(LD65_CFG) $(LD65_LIB) $(LD65_OBJ) \
$(CC65_HOME)/emd $(CC65_HOME)/joy $(CC65_HOME)/mou \
$(CC65_HOME)/ser $(CC65_HOME)/tgi
$(bindir) $(datadir) $(docdir) $(libdir) \
$(CC65_DOC) $(CC65_HOME) \
$(CA65_INC) $(CC65_INC) \
$(LD65_CFG) $(LD65_LIB) $(LD65_OBJ):
$(MKDIR) -p $# || $(MKDIR) $#
$(CC65_HOME)/% $(CC65_INC)/% $(CC65_DOC)/%:
$(MKDIR) $#
install-bins:
for f in ar65 ca65 cc65 cl65 co65 da65 ld65 od65 grc65 sp65; \
do $(INSTALL_STRIP) src/$$f/$$f${EXT} $(bindir) || exit $$?; \
done
$(INSTALL_PROG) src/ca65html/ca65html $(bindir)
install-libs:
for f in asminc/*.inc; \
do $(INSTALL_DATA) $$f $(CA65_INC) || exit $$?; \
done
for f in include/*.h; \
do $(INSTALL_DATA) $$f $(CC65_INC) || exit $$?; \
done
for d in em geos joystick mouse sys tgi; \
do for f in include/$$d/*.h; \
do $(INSTALL_DATA) $$f $(CC65_INC)/$$d || exit $$?; \
done || exit $$?; \
done
for f in libsrc/*.lib; \
do $(INSTALL_DATA) $$f $(LD65_LIB) || exit $$?; \
done
for f in libsrc/*-*.o; \
do $(INSTALL_DATA) $$f $(LD65_OBJ) || exit $$?; \
done
for f in src/ld65/cfg/[!g]*-*.cfg; \
do $(INSTALL_DATA) $$f $(LD65_CFG) || exit $$?; \
done
for d in emd joy mou ser tgi; \
do for f in libsrc/*.$$d; \
do $(INSTALL_DATA) $$f $(CC65_HOME)/$$d || exit $$?; \
done || exit $$?; \
done
install-docs:
for f in src/ca65/macpack/*.mac; \
do $(INSTALL_DATA) $$f $(CC65_DOC) || exit $$?; \
done
for f in readme.1st compile.txt CREDITS BUGS internal.txt newvers.txt; \
do $(INSTALL_DATA) doc/$$f $(CC65_DOC) || exit $$?; \
done
if [ -f doc/index.htm* ]; \
then for f in doc/*.htm*; \
do $(INSTALL_DATA) $$f $(CC65_DOC) || exit $$?; \
done; \
fi
install-samps: ${addprefix $(CC65_DOC)/, $(shell find samples -type d)}
#$(MAKE) -C samples zap
for d in `find samples -type d`; \
do for f in $$d/*; \
do if [ -f $$f ]; \
then $(INSTALL_DATA) $$f $(CC65_DOC)/$$d || exit $$?; \
fi; \
done || exit $$?; \
done
erase-grc:
$(RM) $(bindir)/grc${EXT}