Add compiler.has_define

Adds a new method to the compiler object, has_define.
This makes it possible to check if a preprocessor macro/define
is set or not.

This is especially helpful if the define in question is empty,
for example:

  #define MESON_EMPTY_DEFINE

This would yield the same results as a missing define with
the existing get_define method, as it would return an empty
string for both cases. Therefore this additional method is
needed.

0 files changed, 0 insertions, 0 deletions