This patch drops the linking of odbc library to the driver as it's not needed.

Just linking against odbcinst is enough.

The reason is the same as the one explained here:

https://www.postgresql.org/message-id/1769926.65KUyECjFr@nb.usersys.redhat.com

This fixes a problem in isql under s390x architecture.

More information also here:

https://bugzilla.redhat.com/show_bug.cgi?id=1561400

diff -Naur mysql-connector-odbc-5.2.5-src-orig/cmake/FindODBC.cmake mysql-connector-odbc-5.2.5-src/cmake/FindODBC.cmake

--- mysql-connector-odbc-5.2.5-src-orig/cmake/FindODBC.cmake	2018-04-10 16:14:29.219980686 +0200

+++ mysql-connector-odbc-5.2.5-src/cmake/FindODBC.cmake	2018-04-11 15:59:13.064365508 +0200

@@ -106,6 +106,8 @@

       IF(NOT ODBC_LIB_DIR)

         _FIX_NOPREFIX(ODBC_LINK_FLAGS ${ODBC_CONFIG} "--libs")

+        _FIX_NOPREFIX(ODBC_LIB_PREFIX ${ODBC_CONFIG} "--lib-prefix")

+        SET(ODBCINST_LINK_FLAGS "-L${ODBC_LIB_PREFIX} -lodbcinst")

       ENDIF(NOT ODBC_LIB_DIR)

     ENDIF(NOT ODBC_CONFIG)

diff -Naur mysql-connector-odbc-5.2.5-src-orig/driver/CMakeLists.txt mysql-connector-odbc-5.2.5-src/driver/CMakeLists.txt

--- mysql-connector-odbc-5.2.5-src-orig/driver/CMakeLists.txt	2018-04-10 16:14:29.212980622 +0200

+++ mysql-connector-odbc-5.2.5-src/driver/CMakeLists.txt	2018-04-11 16:01:41.813735855 +0200

@@ -57,7 +57,7 @@

 	TARGET_LINK_LIBRARIES(${DRIVER_NAME} myodbc3u

 				${MYSQL_CLIENT_LIBS} ${ODBCINSTLIB} ${SECURE32_LIB})

 ELSE(WIN32)

-	SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${ODBC_LINK_FLAGS}")

+	SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${ODBCINST_LINK_FLAGS}")

 	TARGET_LINK_LIBRARIES(${DRIVER_NAME} ${MYSQL_CLIENT_LIBS} ${CMAKE_THREAD_LIBS_INIT} m)

 	TARGET_LINK_LIBRARIES(${DRIVER_NAME} myodbc3u)