diff -urN zlib-1.2.3/configure zlib-1.2.3-1/configure
--- zlib-1.2.3/configure	2004-09-07 07:50:06.000000000 +0200
+++ zlib-1.2.3-1/configure	2005-10-19 22:56:16.000000000 +0200
@@ -18,8 +18,9 @@
 # If you have problems, try without defining CC and CFLAGS before reporting
 # an error.
 
-LIBS=libz.a
-LDFLAGS="-L. ${LIBS}"
+STATICLIB=libz.a
+old_ldflags="$LDFLAGS"
+LDFLAGS="-L. ${STATICLIB}"
 VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
 VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < zlib.h`
 VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < zlib.h`
@@ -28,6 +29,7 @@
 prefix=${prefix-/usr/local}
 exec_prefix=${exec_prefix-'${prefix}'}
 libdir=${libdir-'${exec_prefix}/lib'}
+bindir=${bindir-'${exec_prefix}/bin'}
 includedir=${includedir-'${prefix}/include'}
 mandir=${mandir-'${prefix}/share/man'}
 shared_ext='.so'
@@ -71,13 +73,32 @@
   *gcc*) gcc=1;;
 esac
 
+BUILDPLATFORM=`(uname -s || echo unknown) 2>/dev/null`;
+TARGETPLATFORM=${target-${BUILDPLATFORM}}
+
 if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
   CC="$cc"
   SFLAGS=${CFLAGS-"-fPIC -O3"}
   CFLAGS="$cflags"
-  case `(uname -s || echo unknown) 2>/dev/null` in
+  case ${TARGETPLATFORM} in
   Linux | linux | GNU | GNU/*) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1"};;
-  CYGWIN* | Cygwin* | cygwin* | OS/2* )
+  OS/2* )
+             EXE='.exe';;
+  *CYGWIN* | *Cygwin* | *cygwin* )
+             SFLAGS=${CFLAGS}
+             LDFLAGS="-L. -lz ${old_ldflags}"
+             shared_ext='.dll'
+             SHAREDLIB='cygz.dll'
+             IMPORTLIB='libz.dll.a'
+             LDSHARED=${LDSHARED-"${CC} -shared -Wl,-export-all -Wl,--out-implib=${IMPORTLIB}"}
+             EXE='.exe';;
+  *MINGW* | *Mingw* | *mingw* ) 
+             SFLAGS=${CFLAGS}
+             LDFLAGS="-L. -lz ${old_ldflags}"
+             shared_ext='.dll'
+             SHAREDLIB='libz.dll'
+             IMPORTLIB='libz.dll.a'
+             LDSHARED=${LDSHARED-"${CC} -shared -Wl,-export-all -Wl,--out-implib=${IMPORTLIB}"}
              EXE='.exe';;
   QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
          # (alain.bonnefoy@icbt.com)
@@ -147,6 +168,20 @@
              LDSHARED=${LDSHARED-"cc -shared"};;
   esac
 fi
+case ${TARGETPLATFORM} in
+  *CYGWIN* | *Cygwin* | *cygwin* )
+    # On cygwin, we always build both shared and static libs
+    LIBS="${SHAREDLIB} ${STATICLIB}"
+    SHAREDLIBPOST='/bin/true'
+    SHAREDTARGET=${SHAREDLIB}
+    ;;
+  *MINGW* | *Mingw* | *mingw* ) 
+    # On Mingw-cygwin-special, we always build both shared and static libs
+    LIBS="${SHAREDLIB} ${STATICLIB}"
+    SHAREDLIBPOST='/bin/true'
+    SHAREDTARGET=${SHAREDLIB}
+    ;;
+  *)
 
 SHAREDLIB=${SHAREDLIB-"libz$shared_ext"}
 SHAREDLIBV=${SHAREDLIBV-"libz$shared_ext.$VER"}
@@ -170,10 +205,14 @@
 fi
 if test $shared -eq 0; then
   LDSHARED="$CC"
-  echo Building static library $LIBS version $VER with $CC.
+  LIBS="$STATICLIB"
+  LDFLAGS="-L. ${STATICLIB}"
+  echo Building static library $STATICLIB version $VER with $CC.
 else
   LDFLAGS="-L. ${SHAREDLIBV}"
 fi
+  ;;
+esac
 
 cat > $test.c <<EOF
 #include <unistd.h>
@@ -428,15 +467,20 @@
 /^CPP *=/s#=.*#=$CPP#
 /^LDSHARED *=/s#=.*#=$LDSHARED#
 /^LIBS *=/s#=.*#=$LIBS#
+/^STATICLIB *=/s#=.*#=$STATICLIB#
 /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
 /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
 /^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
+/^IMPORTLIB *=/s#=.*#=$IMPORTLIB#
+/^SHAREDLIBPOST *=/s#=.*#=$SHAREDLIBPOST#
+/^SHAREDTARGET *=/s#=.*#=$SHAREDTARGET#
 /^AR *=/s#=.*#=$AR#
 /^RANLIB *=/s#=.*#=$RANLIB#
 /^EXE *=/s#=.*#=$EXE#
 /^prefix *=/s#=.*#=$prefix#
 /^exec_prefix *=/s#=.*#=$exec_prefix#
 /^libdir *=/s#=.*#=$libdir#
+/^bindir *=/s#=.*#=$bindir#
 /^includedir *=/s#=.*#=$includedir#
 /^mandir *=/s#=.*#=$mandir#
 /^LDFLAGS *=/s#=.*#=$LDFLAGS#
diff -urN zlib-1.2.3/Makefile.in zlib-1.2.3-1/Makefile.in
--- zlib-1.2.3/Makefile.in	2007-04-26 15:51:41.000000000 +0200
+++ zlib-1.2.3-1/Makefile.in	2007-04-26 15:55:12.000000000 +0200
@@ -28,10 +28,14 @@
 LDSHARED=$(CC)
 CPP=$(CC) -E
 
-LIBS=libz.a
+STATICLIB=libz.a
 SHAREDLIB=libz.so
 SHAREDLIBV=libz.so.1.2.3
 SHAREDLIBM=libz.so.1
+IMPORTLIB=
+SHAREDLIBPOST='(rm -f $(SHAREDLIB) $(SHAREDLIBM); ln -s $@ $(SHAREDLIB) ; ln -s $@ $(SHAREDLIBM) )'
+SHAREDTARGET=$(SHAREDLIBV)
+LIBS=$(STATICLIB)
 
 AR=ar rc
 RANLIB=ranlib
@@ -42,6 +46,7 @@
 prefix = /usr/local
 exec_prefix = ${prefix}
 libdir = ${exec_prefix}/lib
+bindir = ${exec_prefix}/bin
 includedir = ${prefix}/include
 mandir = ${prefix}/share/man
 man3dir = ${mandir}/man3
@@ -67,8 +72,8 @@
 	  echo '		*** zlib test FAILED ***'; \
 	fi
 
-libz.a: $(OBJS) $(OBJA)
-	$(AR) $@ $(OBJS) $(OBJA)
+$(STATICLIB): $(OBJS) $(OBJA)
+	$(AR) $(ARFLAGS) $@ $(OBJS) $(OBJA)
 	-@ ($(RANLIB) $@ || true) >/dev/null 2>&1
 
 match.o: match.S
@@ -77,11 +82,9 @@
 	mv _match.o match.o
 	rm -f _match.s
 
-$(SHAREDLIBV): $(OBJS)
+$(SHAREDTARGET): $(OBJS)
 	$(LDSHARED) -o $@ $(OBJS)
-	rm -f $(SHAREDLIB) $(SHAREDLIBM)
-	ln -s $@ $(SHAREDLIB)
-	ln -s $@ $(SHAREDLIBM)
+	$(SHAREDLIBPOST)
 
 example$(EXE): example.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)
@@ -90,37 +93,58 @@
 	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
 
 install: $(LIBS)
-	-@if [ ! -d $(exec_prefix) ]; then mkdir -p $(exec_prefix); fi
-	-@if [ ! -d $(includedir)  ]; then mkdir -p $(includedir); fi
-	-@if [ ! -d $(libdir)      ]; then mkdir -p $(libdir); fi
-	-@if [ ! -d $(man3dir)     ]; then mkdir -p $(man3dir); fi
-	cp zlib.h zconf.h $(includedir)
-	chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
-	cp $(LIBS) $(libdir)
-	cd $(libdir); chmod 755 $(LIBS)
-	-@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
-	cd $(libdir); if test -f $(SHAREDLIBV); then \
-	  rm -f $(SHAREDLIB) $(SHAREDLIBM); \
-	  ln -s $(SHAREDLIBV) $(SHAREDLIB); \
-	  ln -s $(SHAREDLIBV) $(SHAREDLIBM); \
-	  (ldconfig || true)  >/dev/null 2>&1; \
-	fi
-	cp zlib.3 $(man3dir)
-	chmod 644 $(man3dir)/zlib.3
+	-@if [ ! -d $(DESTDIR)$(exec_prefix) ]; then mkdir -p $(DESTDIR)$(exec_prefix); fi
+	-@if [ ! -d $(DESTDIR)$(includedir)  ]; then mkdir -p $(DESTDIR)$(includedir); fi
+	-@if [ ! -d $(DESTDIR)$(libdir)      ]; then mkdir -p $(DESTDIR)$(libdir); fi
+	-@if [ ! -d $(DESTDIR)$(bindir)      ]; then mkdir -p $(DESTDIR)$(bindir); fi
+	-@if [ ! -d $(DESTDIR)$(man3dir)     ]; then mkdir -p $(DESTDIR)$(man3dir); fi
+	cp zlib.h zconf.h $(DESTDIR)$(includedir)
+	chmod 644 $(DESTDIR)$(includedir)/zlib.h $(DESTDIR)$(includedir)/zconf.h
+	cp zlib.3 $(DESTDIR)$(man3dir)
+	chmod 644 $(DESTDIR)$(man3dir)/zlib.3
+# Install static lib (and import lib, if set) into libdir
 # The ranlib in install is needed on NeXTSTEP which checks file times
+	-cp $(STATICLIB) $(IMPORTLIB) $(DESTDIR)$(libdir)
+	-@(cd $(DESTDIR)$(libdir); \
+	$(RANLIB) libz.a || true; \
+	chmod 755 $(STATICLIB) $(IMPORTLIB)) >/dev/null 2>&1
+# Install shared lib -- if IMPORTLIB is set, then sharedlib goes into bindir
 # ldconfig is for Linux
+	if test -z "$(IMPORTLIB)" ; then \
+	  if test -n "$(SHAREDTARGET)" ; then \
+	    if test -f "$(SHAREDTARGET)" ; then \
+	      cp $(SHAREDTARGET) $(DESTDIR)$(libdir); \
+	    fi; \
+	  fi; \
+	  cd $(DESTDIR)$(libdir); \
+	  if test -n "$(SHAREDLIBV)" ; then \
+	    if test -f "$(SHAREDLIBV)" ; then \
+	      rm -f $(SHAREDLIB) $(SHAREDLIBM); \
+	      ln -s $(SHAREDLIBV) $(SHAREDLIB); \
+	      ln -s $(SHAREDLIBV) $(SHAREDLIBM); \
+	      (ldconfig || true) >/dev/null 2>&1; \
+	    fi; \
+	  fi; \
+	else \
+	  cp $(SHAREDTARGET) $(DESTDIR)$(bindir); \
+	  (cd $(DESTDIR)$(bindir); chmod 755 $(SHAREDTARGET)); \
+	fi
 
 uninstall:
-	cd $(includedir); \
-	cd $(libdir); rm -f libz.a; \
-	if test -f $(SHAREDLIBV); then \
-	  rm -f $(SHAREDLIBV) $(SHAREDLIB) $(SHAREDLIBM); \
+	cd $(DESTDIR)$(includedir); \
+	cd $(DESTDIR)$(libdir); rm -f $(STATICLIB) $(IMPORTLIB); \
+	if test -f "$(SHAREDLIBV)"; then \
+	  if test -f "$(SHAREDLIBV)"; then \
+	    rm -f $(SHAREDLIBV) $(SHAREDLIB) $(SHAREDLIBM); \
+	  fi \
 	fi
-	cd $(man3dir); rm -f zlib.3
+	cd $(DESTDIR)$(man3dir); rm -f zlib.3
+	cd $(DESTDIR)$(bindir); (rm -f $(SHAREDLIB) || true) > /dev/null 2>&1
 
 mostlyclean: clean
 clean:
 	rm -f *.o *~ example$(EXE) minigzip$(EXE) \
+	   $(STATICLIB) $(IMPORTLIB) $(SHAREDLIBV) $(SHAREDLIBV) $(SHAREDLIBM) \
 	   libz.* foo.gz so_locations \
 	   _match.s maketree contrib/infback9/*.o