Migration of your applications
This section lists important considerations when you migrate your applications that was compiled with other versions of XL C/C++ or with GCC.
- Migrating from Linux for big endian distributions to Linux for little endian distributions
You must consider some factors when migrating your applications from POWER8® big endian systems. - Migrating from V13.1.1 Linux for little endian distributions to V13.1.2 Linux for little endian distributions
When you migrate programs from V13.1.1 to V13.1.2 little endian Linux, it is recommended that you use the -qnoxlcompatmacros option to undefine legacy macros
__IBMCPP__, __xlC__, __xlC_ver__
, 
__IBMC__,
and __xlc__
. - Migrating applications that use transactional memory built-in functions
Starting from IBM® XL C/C++ for Linux V13.1.2, to use transactional memory built-in functions, you must include a header file in the source code. In addition, if you used numeric return values of the transaction begin and end built-in functions, you must replace numeric return values with macro return values that are provided by IBM XL C/C++ for Linux, V13.1.2.
