update CMakeLists.txt

Author: jin1xiao3long2

.ssh

@@ -15,3 +15,4 @@ add_executable(testC test.cpp)
 
 target_link_libraries(testC ${RapidJSON_LIBS})
 target_link_libraries(testC libmuduo_net.a libmuduo_base.a)
+target_link_libraries(testC libnanodbc.a)

.ssh.pub

@@ -59,6 +59,25 @@ sudo make install #generate lib files and put them in /usr/lib(maybe)
 
 ## Compile nanodbc
 
+Before you compile nanodbc, you should download UnixOdbc:
+
+download unixODBC-2.3.0.tar.gz
+
+```bash
+tar -xzvf unixODBC-2.3.0.tar.gz
+
+cd unixODBC-2.3.0.tar.gz
+
+./configure --enable-gui=no
+
+make
+
+sudo make install
+
+odbc_config  --version  #check odbc_config is installed
+
+```
+
 ```bash
 git clone <https://github.com/nanodbc/nanodbc.git> #download nanodbc
 
@@ -117,6 +136,6 @@ cp * ../../../cids-servsers/lib #put lib file to projectPath/lib
       - base 
     - nanodbc 
   - lib 
-    - libxxx.a      #10 lib files
+    - libxxx.a      #7/10 lib files