-qshowmacros

In z/OS® XL C/C++, the -qshowmacros option displays macro definitions to preprocessed output, which helps to determine the available functionality in the compiler.

In Open XL C/C++ for z/OS, the -dM -E options provide similar functions as -qshowmacros or -qshowmacros=all. However, -dM -E do not provide equivalent functions of -qshowmacros=pre or -qshowmacros=nopre, which controls whether to display predefined macro definitions to preprocessed output.