Problems Linking to the MariaDB Client Library

When linking with the C API, the following errors may occur on some systems:

gcc -g -o client test.o -L/usr/local/lib/mysql \
 -lmysqlclient -lsocket -lnsl Undefined first referenced
 symbol in file floor /usr/local/lib/mysql/libmysqlclient.a(password.o)
ld: fatal: Symbol referencing errors. No output written to client

If this happens on your system, you must include the math library by adding -lm to the end of the compile/link line.

When you are linking an application program to use the MariaDB client library, you might get undefined reference errors for symbols that start with mysql_, such as those shown here:

/tmp/ccFKsdPa.o: In function `main':
/tmp/ccFKsdPa.o(.text+0xb): undefined reference to `mysql_init'
/tmp/ccFKsdPa.o(.text+0x31): undefined reference to `mysql_real_connect'
/tmp/ccFKsdPa.o(.text+0x57): undefined reference to `mysql_real_connect'
/tmp/ccFKsdPa.o(.text+0x69): undefined reference to `mysql_error'
/tmp/ccFKsdPa.o(.text+0x9a): undefined reference to `mysql_close'

You should be able to solve this problem by adding -Ldir_path -lmysqlclient at the end of your link command, where dir_path represents the path name of the directory where the client library is located. To determine the correct directory, try this command:

shell> mysql_config --libs

The output from mysql_config might indicate other libraries that should be specified on the link command as well.

If you get undefined reference errors for the uncompress or compress function, add -lz to the end of your link command and try again.

If you get undefined reference errors for a function that should exist on your system, such as connect, check the manual page for the function in question to determine which libraries you should add to the link command.

You might get undefined reference errors such as the following for functions that don't exist on your system:

mf_format.o(.text+0x201): undefined reference to `__lxstat'

This usually means that your MariaDB client library was compiled on a system that is not 100% compatible with yours. In this case, you should download the latest MariaDB source distribution and compile MariaDB yourself. See , "Installing MariaDB from Source".

You might get undefined reference errors at runtime when you try to execute a MariaDB program. If these errors specify symbols that start with mysql_ or indicate that the mysqlclient library can't be found, it means that your system can't find the shared libmysqlclient.so library. The fix for this is to tell your system to search for shared libraries where the library is located. Use whichever of the following methods is appropriate for your system:

Add the path to the directory where libmysqlclient.so is located to the LD_LIBRARY_PATH environment variable.
Add the path to the directory where libmysqlclient.so is located to the LD_LIBRARY environment variable.
Copy libmysqlclient.so to some directory that is searched by your system, such as /lib, and update the shared library information by executing ldconfig.

Problems Linking to the MariaDB Client Library

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