Cannot install MySQL connector/c++ correctly in my ubuntu - c++

Question

I followed the instructions given by Mysql but I got an error when I want to test it.
These are my inputs:
$ git clone https://github.com/mysql/mysql-connector-cpp.git
$ cd mysql-connector-cpp
$ git checkout 8.0
$ mkdir build
$ cd build
$ cmake ..
$ cmake --build .
$ sudo cmake --build . --target install
$ cmake -DWITH_CONCPP=/usr/local/mysql/connector-c++-8.0 ../testapp
And I got an error:
Using dynamic runtime library.
Generationg 64bit code
Looking for connector libraries here: /usr/local/mysql/connector-c++-8.0/lib64
Looking for the main library mysqlcppconn8
CMake Error at CMakeLists.txt:165 (message):
Could not find MySQL Connector/C++ 8.0 library mysqlcppconn8 at specified
location: /usr/local/mysql/connector-c++-8.0/lib64
-- Configuring incomplete, errors occurred!
And here is the document link:
MySql Installing Connector/C++ from Source
This is the relevant part of the document.
To verify connector functionality, build and run one or more of the test programs included in the testapp directory of the source distribution. Create a directory to use and change location into it. Then issue the following commands:
$ cmake [other_options] -DWITH_CONCPP=concpp_install concpp_source/testapp
other_options consists of the options that you used to configure
Connector/C++ itself (-G, WITH_BOOST, BUILD_STATIC, and so forth).
concpp_source is the directory containing the Connector/C++ source
code, and concpp_install is the directory where Connector/C++ is
installed:

Answer 1

I also occured your problems. This is my solution:
$ git clone https://github.com/mysql/mysql-connector-cpp.git
$ cd mysql-connector-cpp
$ git checkout 8.0
$ mkdir build
$ cd build
# The problem is here: CMAKE_BUILD_TYPE default value is Debug
# so it install .so in WITH_CONCPP/lib64/debug.
$ cmake -DCMAKE_BUILD_TYPE=Release ..
# I don't know why the options "--config Debug( or Release)" is disable.
$ cmake --build .
$ sudo cmake --build . --target install
$ cmake -DWITH_CONCPP=/usr/local/mysql/connector-c++-8.0 ../testapp