have_struct_member(type, member, headers = nil, opt = "", &b)
Instance Public methods
Returns whether or not the struct of type type contains
member. If it does not, or the struct type can't be
found, then false is returned. You may optionally specify additional
headers in which to look for the struct (in addition to the
common header files).
If found, a macro is passed as a preprocessor constant to the compiler
using the type name and the member name, in uppercase, prepended