Compatibility of preexisting ESQL/C applications with current library versions
You specify the esql command-line options
(in The esql command-line
options for Informix general
libraries)
to tell the esql command which version of the HCL Informix® libraries
to link with the Informix® ESQL/C application.
After the esql command successfully compiles and
links your application, the version of the Informix® general
libraries is fixed. When you install a new version of Informix® ESQL/C, you
receive new copies of the Informix® general
libraries. Whether you need to recompile and relink your existing Informix® ESQL/C applications
to run with these new copies depends on the factors that the following
table describes.
| Change to the Informix® general library | Version of the Informix® general library | Need to recompile or relink? |
|---|---|---|
| New release of the Informix® general libraries | Static Thread-safe static |
Only if the application needs to take advantage of a new feature in the new release |
| Informix® general libraries in new release have a new major-version number | Shared Thread-safe shared |
Only if the application needs to take advantage of a new feature in the new release |
| Informix® general libraries in new release have a new API-version number | Shared Thread-safe shared |
Must recompile and relink |
On UNIX™, you can use the ifx_getversion utility to determine the version of the Informix® library that is installed on your system.
In Windows™ environments,
use the following find command to find the occurrence
of the string that contains the version number in the isqlt09A.dll.
The command needs to be issued from the %INFORMIXDIR%\bin directory.
C: cd %INFORMIXDIR%\bin
C: find INFORMIX-SQL isqlt09a.dllThe
output of the find command is shown:
- - - - - - - - - ISQLT09A.DLL
INFORMIX-SQL Version 9.20T1N79