libpq-fe.h No such file or directory about sqlpp11-connector-postgresql

[vaggeliskls]

Solution
I fix it by changing the import of of libpq-fe.h in result.h (line 35) and then cmake and make install
FROM
#include <libpq-fe.h>
TO
#include <postgresql/libpq-fe.h>
This was mentioned in #17 but the error was in cmake not in compile.
After this i had an other problem as showed below in compile.

/tmp/ccFDbbWa.o: In function `main':
crow.cpp:(.text+0x856): undefined reference to `sqlpp::postgresql::connection::connection(std::shared_ptr<sqlpp::postgresql::connection_config> const&)'
crow.cpp:(.text+0x862): undefined reference to `sqlpp::postgresql::connection::~connection()'
collect2: error: ld returned 1 exit status

My code is this.

#include <sqlpp11/exception.h>
#include <sqlpp11/postgresql/connection.h>
#include <sqlpp11/postgresql/exception.h>
#include <iostream>
int main()
{
        try
        {
            auto config = std::make_shared<sqlpp::postgresql::connection_config>();
            config->host = "127.0.0.1";
            config->user = "someuser";
            config->password = "some-random-password";
            config->dbname = "somedb";
            sqlpp::postgresql::connection db(config);
        }
        catch (const std::exception& ex)
        {
            std::cout << "Got exception: '" << ex.what() << "'";
            return 0;
        }
}

I know that is questions are for a forum topic, but any help will be appreciated.