Stop-gap Makefile for Cygwin

diff --git a/platform/example_cygwin/Makefile b/platform/example_cygwin/Makefile
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+# $Id: Makefile 393 2010-03-12 11:08:14Z solar $
+
+# This is where you chose which platform to compile for (see 'make links' / './platform')
+PLATFORM := example_cygwin
+
+# This is a list of all non-source files that are part of the distribution.
+AUXFILES := Makefile Readme.txt
+
+# Directories belonging to the project
+PROJDIRS := functions includes internals
+# All source files of the project
+SRCFILES := $(shell find $(PROJDIRS) -mindepth 1 -maxdepth 3 -name "*.c")
+# All header files of the project
+HDRFILES := $(shell find $(PROJDIRS) -mindepth 1 -maxdepth 3 -name "*.h")
+# All .c files in functions/_PDCLIB that do not have a regression test driver
+INTFILES := _Exit atomax digits open print scan remove rename seed stdinit strtox_main strtox_prelim cleanstream fflush filemode eol errno seek prepread prepwrite allocpages
+# All object files in the library
+OBJFILES := $(patsubst %.c,%.o,$(SRCFILES))
+# All test drivers (.t)
+TSTFILES := $(patsubst %.c,%.t,$(SRCFILES))
+# All regression test drivers (.r)
+REGFILES := $(filter-out $(patsubst %,functions/_PDCLIB/%.r,$(INTFILES)),$(patsubst %.c,%.r,$(SRCFILES)))
+# All dependency files (.d)
+DEPFILES := $(patsubst %.c,%.d,$(SRCFILES))
+# All files belonging to the source distribution
+ALLFILES := $(SRCFILES) $(HDRFILES) $(AUXFILES)
+
+# All files in platform/$(PLATFORM)/functions/_PDCLIB (for development only)
+PATCHFILES1 := $(shell ls platform/$(PLATFORM)/functions/_PDCLIB/*.c)
+# All files in platform/$(PLATFORM)/functions/stdlib (for development only)
+PATCHFILES2 := $(shell ls platform/$(PLATFORM)/functions/stdlib/*.c)
+# All files in platform/$(PLATFORM)/functions/stdio (for development only)
+PATCHFILES3 := $(shell ls platform/$(PLATFORM)/functions/stdio/*.c)
+
+WARNINGS := -Wall -Wextra -pedantic -Wno-unused-parameter -Wshadow -Wpointer-arith -Wcast-align -Wwrite-strings -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -Wnested-externs -Winline -Wno-long-long -fno-builtin 
+CFLAGS := -g -std=gnu99 -I./internals $(WARNINGS) $(USERFLAGS)
+
+.PHONY: all clean srcdist bindist test tests testdrivers regtests regtestdrivers todos fixmes find links unlink help
+
+all: pdclib.a testdrivers regtestdrivers
+       @echo
+       @echo "========================"
+       @echo "Executing library tests:"
+       @echo "========================"
+       @echo
+       @$(MAKE) tests | grep -v "^ TST" | grep -v "^Failed"
+       @echo
+       @echo "==========================="
+       @echo "Executing regression tests:"
+       @echo "==========================="
+       @echo
+       @$(MAKE) regtests | grep -v "^ RTST" | grep -v "^Failed"
+
+pdclib.a: $(OBJFILES)
+       @echo " AR      $@"
+       @ar rc pdclib.a $?
+       @echo
+
+test: functions/$(FILE)
+       functions/$(FILE)
+
+tests: testdrivers
+       -@rc=0; count=0; failed=""; for file in $(TSTFILES); do echo " TST      $$file"; ./$$file; test=$$?; if [ $$test != 0 ]; then rc=`expr $$rc + $$test`; failed="$$failed $$file"; fi; count=`expr $$count + 1`; done; echo; echo "Tests executed (linking PDCLib): $$count  Tests failed: $$rc"; echo; for file in $$failed; do echo "Failed: $$file"; done; echo
+
+testdrivers: $(TSTFILES)
+       @echo
+
+regtests: regtestdrivers
+       -@rc=0; count=0; failed=""; for file in $(REGFILES); do echo " RTST     $$file"; ./$$file; test=$$?; if [ $$test != 0 ]; then rc=`expr $$rc + $$test`; failed="$$failed $$file"; fi; count=`expr $$count + 1`; done; echo; echo "Tests executed (linking system libc): $$count  Tests failed: $$rc"; echo; for file in $$failed; do echo "Failed: $$file"; done; echo
+
+regtestdrivers: $(REGFILES)
+       @echo
+
+-include $(DEPFILES)
+
+clean:
+       @for file in $(OBJFILES) $(DEPFILES) $(TSTFILES) $(REGFILES) pdclib.a pdclib.tgz; do if [ -f $$file ]; then rm $$file; fi; done
+
+srcdist:
+       @tar czf pdclib.tgz $(ALLFILES)
+
+todos:
+       -@for file in $(ALLFILES); do grep -H TODO $$file; done; true
+
+fixmes:
+       -@for file in $(ALLFILES); do grep -H FIXME $$file; done; true
+
+find:
+       @find functions/ includes/ internals/ platform/ -name "*\.[ch]" -type f | xargs grep $$FIND
+
+links:
+       @echo "Linking platform/$(PLATFORM)..."
+       @cd internals && ln -s ../platform/$(PLATFORM)/internals/_PDCLIB_config.h
+       @cd includes && ln -s ../platform/$(PLATFORM)/includes/float.h
+       @cd functions/_PDCLIB && for file in $(PATCHFILES1); do basfile=`basename $$file`; if [ ! -f $$basfile ]; then ln -s `ls ../../$$file` .; fi; done
+       @cd functions/stdlib && for file in $(PATCHFILES2); do basfile=`basename $$file`; if [ ! -f $$basfile ]; then ln -s `ls ../../$$file` .; fi; done
+       @cd functions/stdio && for file in $(PATCHFILES3); do basfile=`basename $$file`; if [ ! -f $$basfile ]; then ln -s `ls ../../$$file` .; fi; done
+
+unlink:
+       @echo "Unlinking platform files..."
+       @if [ -f internals/_PDCLIB_config.h ]; then rm internals/_PDCLIB_config.h; fi
+       @if [ -f includes/float.h ]; then rm includes/float.h; fi
+       @cd functions/_PDCLIB && for file in $(PATCHFILES1); do basfile=`basename $$file`; if [ -f $$basfile ]; then rm $$basfile; fi; done
+       @cd functions/stdlib && for file in $(PATCHFILES2); do basfile=`basename $$file`; if [ -f $$basfile ]; then rm $$basfile; fi; done
+       @cd functions/stdio && for file in $(PATCHFILES3); do basfile=`basename $$file`; if [ -f $$basfile ]; then rm $$basfile; fi; done
+
+help:
+       @echo "Available make targets:"
+       @echo
+       @echo "all              - build pdclib.a"
+       @echo "clean            - remove all object files, dependency files and test drivers"
+       @echo "srcdist          - build pdclib.tgz (source tarball)"
+       @echo "test             - test a single testdriver (Usage: FILE=\"test.[rt]\" make test)"
+       @echo "tests            - build and run test drivers (link pdclib.a)"
+       @echo "  testdrivers    - build but do not run test drivers"
+       @echo "regtests         - build and run regression test drivers (link system clib)"
+       @echo "  regtestdrivers - build but do not run regression test drivers"
+       @echo "todos            - list all TODO comments in the sources"
+       @echo "fixmes           - list all FIXME comments in the sources"
+       @echo "find             - find a phrase in the sources (Usage: FIND=\"phrase\" make find)"
+       @echo "links            - link platform files (development only)"
+       @echo "unlink           - remove links to platform files (development only)"
+       @echo "%.o              - build an individual object file"
+       @echo "%.t              - build an individual test driver"
+       @echo "%.r              - build an individual regression test driver"
+       @echo "help             - print this list"
+       @echo
+       @echo "Any additional compiler flags you want to use can be passed as USERFLAGS"
+       @echo "(Usage: USERFLAGS=\"flags\" make [...])."
+
+%.o: %.c Makefile
+       @echo " CC      $(patsubst functions/%,%,$@)"
+       @$(CC) $(CFLAGS) -MMD -MP -MT "$*.d $*.t" -I./includes -c $< -o $@
+
+%.t: %.c Makefile pdclib.a
+       @echo " CC      $(patsubst functions/%,%,$@)"
+       @$(CC) $(CFLAGS) -DTEST -I./includes $< pdclib.a -o $@
+
+%.r: %.c Makefile
+       @echo " CC      $(patsubst functions/%,%,$@)"
+       @$(CC) $(CFLAGS) -Wno-format -DTEST -DREGTEST $< -o $@
+