Engineering and Scientific Subroutine Library for AIX Version 3 Release 3: Guide and Reference

Migrating ESSL Version 3 Programs to Version 3 Release 2

This section describes all the aspects of migrating your ESSL Version 3 application programs to Version 3 Release 2.

Note:

For a list of the new features added in ESSL Version 3 Release 2, see Changes for ESSL Version 3 Release 2.

• No changes to your application programs are required if you are migrating from ESSL Version 3 Release 1.2 to ESSL Version 3 Release 2.
• The ESSL POWER2 and Thread-Safe POWER2 libraries are no longer provided. Existing applications that use these libraries will continue to run because appropriate symbolic links are created at install time to preserve binary compatibility ¹ However, if you are creating new applications you should use:
  • The ESSL Serial or SMP library instead of the ESSL Thread-Safe POWER2 Library.
  • The ESSL Serial Library instead of the ESSL POWER2 Library.
• The ESSL POWER and Thread-Safe libraries have been replaced by a thread-safe library referred to as the ESSL Serial Library.

ESSL Subroutines

The calling sequences for the subroutines in ESSL Version 3 Release 1.2 and ESSL Version 3 Release 2 are identical. No changes to your application programs are required if you are migrating from ESSL Version 3 Release 1.2 to ESSL Version 3 Release 2.

¹

Customers that require the tuned POWER2 libraries for performance reasons have the option of retaining the ESSL Version 3 Release 1.2 POWER2 libraries when ESSL Version 3 Release 2 is installed. See the ESSL Install Memo for details.