--- zlib1-1.1.3.orig/configure
+++ zlib1-1.1.3/configure
@@ -69,11 +69,11 @@
 
 if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
   CC="$cc"
-  SFLAGS=${CFLAGS-"-fPIC -O3"}
+  SFLAGS=${CFLAGS-"-D_REENTRANT -fPIC -O2"}
   CFLAGS="$cflags"
   case `(uname -s || echo unknown) 2>/dev/null` in
-  Linux | linux) LDSHARED=${LDSHARED-"gcc -shared -Wl,-soname,libz.so.1"};;
-  *)             LDSHARED=${LDSHARED-"gcc -shared"};;
+  Linux | linux) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1 -lc"};;
+  *)             LDSHARED=${LDSHARED-"$cc -shared"};;
   esac
 else
   # find system name and corresponding cc options
--- zlib1-1.1.3.orig/Makefile
+++ zlib1-1.1.3/Makefile
@@ -12,20 +12,20 @@
 # To install in $HOME instead of /usr/local, use:
 #    make install prefix=$HOME
 
-CC=cc
+CC=gcc
 
-CFLAGS=-O
+CFLAGS=$(OPTIMIZE) -D_REENTRANT -fPIC -DHAVE_UNISTD_H -DUSE_MMAP
 #CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
 #CFLAGS=-g -DDEBUG
 #CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
 #           -Wstrict-prototypes -Wmissing-prototypes
 
 LDFLAGS=-L. -lz
-LDSHARED=$(CC)
-CPP=$(CC) -E
+LDSHARED=gcc -shared -Wl,-soname,libz.so.1 -lc
+CPP=gcc -E
 
 VER=1.1.3
-LIBS=libz.a
+LIBS=libz.so.1.1.3
 SHAREDLIB=libz.so
 
 AR=ar rc
@@ -33,10 +33,10 @@
 TAR=tar
 SHELL=/bin/sh
 
-prefix = /usr/local
-exec_prefix = ${prefix}
-libdir = ${exec_prefix}/lib
-includedir = ${prefix}/include
+prefix =/usr/local
+exec_prefix =${prefix}
+libdir =${exec_prefix}/lib
+includedir =${prefix}/include
 
 OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
        zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
--- zlib1-1.1.3.orig/contrib/minizip/Makefile
+++ zlib1-1.1.3/contrib/minizip/Makefile
@@ -1,8 +1,8 @@
 CC=cc
-CFLAGS=-O -I../..
+CFLAGS=-O2 -I../..
 
-UNZ_OBJS = miniunz.o unzip.o ../../libz.a
-ZIP_OBJS = minizip.o zip.o   ../../libz.a
+UNZ_OBJS = miniunz.o unzip.o
+ZIP_OBJS = minizip.o zip.o
 
 .c.o:
 	$(CC) -c $(CFLAGS) $*.c
@@ -10,10 +10,10 @@
 all: miniunz minizip
 
 miniunz:  $(UNZ_OBJS)
-	$(CC) $(CFLAGS) -o $@ $(UNZ_OBJS)
+	$(CC) $(CFLAGS) -o $@ $(UNZ_OBJS) -L ../.. -lz
 
 minizip:  $(ZIP_OBJS)
-	$(CC) $(CFLAGS) -o $@ $(ZIP_OBJS)
+	$(CC) $(CFLAGS) -o $@ $(ZIP_OBJS) -L ../.. -lz
 
 test:	miniunz minizip
 	./minizip test readme.txt
--- zlib1-1.1.3.orig/contrib/minizip/zip.c
+++ zlib1-1.1.3/contrib/minizip/zip.c
@@ -483,7 +483,7 @@
         zi->ci.stream.opaque = (voidpf)0;
 
         err = deflateInit2(&zi->ci.stream, level,
-               Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, 0);
+               Z_DEFLATED, -MAX_WBITS, MAX_MEM_LEVEL, 0);
 
         if (err==Z_OK)
             zi->ci.stream_initialised = 1;
--- zlib1-1.1.3.orig/ztest12023.c
+++ zlib1-1.1.3/ztest12023.c
@@ -0,0 +1,2 @@
+extern int getchar();
+int hello() {return getchar();}