have_type(type, headers = nil, opt = "", &b)
Instance Public methods
Returns whether or not the static type type is defined. You
may optionally pass additional headers to check against in
addition to the common header files.
You may also pass additional flags to opt which are then
passed along to the compiler.
If found, a macro is passed as a preprocessor constant to the compiler
using the type name, in uppercase, prepended with HAVE_TYPE_.
For example, if have_type('foo') ret