Migrating from earlier Open XL releases

When you migrate programs from earlier Open XL releases, consider a number of changes such as ABI compatibility.

Discrepancies for option defaults
The section shows the discrepancies for compiler option defaults between IBM Open XL C/C++ for AIX 17.1.3 and earlier Open XL releases.
Compatibility limitations of libc++
Consider compatibility limitations of libc++ when you use IBM® Open XL C/C++ for AIX® 17.1.1.2 or earlier Open XL C/C++ releases.
Support for visibility attributes
IBM Open XL C/C++ for AIX 17.1.3 no longer ignores visibility attributes as in IBM Open XL C/C++ for AIX 17.1.0. The -fvisibility and -fvisibility-inlines-hidden options are provided to modify visibility at a translation unit level.

Parent topic: Migration