Use Cloudflare zlib for more aggressive optimizations

native/compile-linux-amd64.sh

@@ -1,21 +1,21 @@
 #!/bin/bash
 
-if [ ! -d zlib-ng ]; then
-  echo "Cloning zlib-ng..."
-  git clone https://github.com/zlib-ng/zlib-ng.git
+if [ ! -d zlib-cf ]; then
+  echo "Cloning Cloudflare zlib..."
+  git clone -b gcc.amd64 https://github.com/cloudflare/zlib.git zlib-cf
 fi
 
-echo "Compiling zlib-ng..."
-cd zlib-ng
-CFLAGS="-fPIC -O3 -mtune=skylake -flto" AR=gcc-ar RANLIB=gcc-ranlib ./configure --zlib-compat --static
-make clean && make
-cd ..
+#echo "Compiling Cloudflare zlib..."
+#cd zlib-cf
+#CFLAGS="-fPIC -O3 -mtune=skylake -flto" AR=gcc-ar RANLIB=gcc-ranlib ./configure --static
+#make clean && make
+#cd ..
 
 # Modify as you need.
 MBEDTLS_ROOT=mbedtls
 CFLAGS="-O3 -I$JAVA_HOME/include/ -I$JAVA_HOME/include/linux/ -fPIC -shared -mtune=skylake -flto"
-gcc $CFLAGS -Izlib-ng src/main/c/jni_util.c src/main/c/jni_zlib_deflate.c src/main/c/jni_zlib_inflate.c \
-    src/main/c/jni_zlib_common.c zlib-ng/libz.a  -o src/main/resources/linux_x64/velocity-compress.so
+gcc $CFLAGS -Izlib-cf src/main/c/jni_util.c src/main/c/jni_zlib_deflate.c src/main/c/jni_zlib_inflate.c \
+    src/main/c/jni_zlib_common.c zlib-cf/libz.a -Wl,-z,noexecstack -o src/main/resources/linux_x64/velocity-compress.so
 gcc $CFLAGS  -I $MBEDTLS_ROOT/include -shared $MBEDTLS_ROOT/library/aes.c $MBEDTLS_ROOT/library/aesni.c \
     $MBEDTLS_ROOT/library/platform.c $MBEDTLS_ROOT/library/platform_util.c src/main/c/jni_util.c src/main/c/jni_cipher.c \
     -o src/main/resources/linux_x64/velocity-cipher.so