Fix noexecstack for natives.

native/compile-linux-amd64.sh

@@ -7,13 +7,13 @@ fi
 
 echo "Compiling Cloudflare zlib..."
 cd zlib-cf
-CFLAGS="-fPIC -O3 -mtune=skylake -flto" AR=gcc-ar RANLIB=gcc-ranlib ./configure --static
+CFLAGS="-fPIC -O3 -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"
+CFLAGS="-O3 -I$JAVA_HOME/include/ -I$JAVA_HOME/include/linux/ -fPIC -shared -Wl,-z,noexecstack"
 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 \