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POc++ " was not declared in this scope error while using shared library generated by MySQL C API
 

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  1. POc++ " was not declared in this scope error while using shared library generated by MySQL C API
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    <p>I generated a shared library which wraps MySQL C API functions. It has a sample.h and sample.cpp files like this</p> <pre><code>using namespace std; class MysqlInstance { protected: string user; string password; string socket; int port; public: MySqlInstance(string,string,string,port); int connectToDB(); } </code></pre> <p>In sample.cpp</p> <pre><code>MySqlInstance::MySqlInstance(string user,string pass,string sock,int port) { this-&gt;port=port; this-&gt;user=user; this-&gt;password=pass; this-&gt;socket=sock; } MySqlInstance::connectToDB() { //code to load libmysqlclient.so from /usr/lib64 and use mysql_init and mysql_real_connect // functions to connect and "cout" that connection is successful } </code></pre> <p>Used: </p> <ul> <li><p>g++ -fPIC -c sample.cpp <code>mysql_config --cflags</code></p></li> <li><p>g++ -shared -Wl,-soname,libsample.so -o libsample.so sample.o <code>mysql_config --libs</code></p></li> </ul> <p>Now libsample.so is generated and I moved it to /usr/lib Now I created a small cpp file which uses this shared library in the same directory. <strong>usesample.cpp</strong></p> <pre><code>#include "sample.h" using namespace std; int main() { MysqlInstance* object=new MySQlInstance("root","toor","/lib/socket",3306); } </code></pre> <p>Used:</p> <ul> <li>g++ -c usesample.cpp -lsample</li> </ul> <p>It is giving me this error:</p> <blockquote> <p>error: âMysqlInstanceâ was not declared in this scope error: object was not declared in this scope</p> </blockquote> <p>Thanks</p>
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    1. This table or related slice is empty.
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    1. USSreekar
    1. USSreekar
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    1. PO
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    2. PO
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    1. VO
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      1. POc++ " was not declared in this scope error while using shared library generated by MySQL C API
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
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      1. POc++ " was not declared in this scope error while using shared library generated by MySQL C API
      1. This table or related slice is empty.
      1. VTDownMod
    1. COI don't know if it's a copy-paste error when posting your question, but you have two `port` member variables in your `MysqlInstance` class.
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      1. POc++ " was not declared in this scope error while using shared library generated by MySQL C API
      1. USSome programmer dude
    2. COYeah..thats a typo..the problem here is when I do the samething without MySQL C API and all I didnt get these types of errors.
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      1. POc++ " was not declared in this scope error while using shared library generated by MySQL C API
      1. USSreekar
 

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