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diff --git a/doc/tutorial/globalheader.rst b/doc/tutorial/globalheader.rst new file mode 100644 index 000000000..7e853f8c2 --- /dev/null +++ b/doc/tutorial/globalheader.rst @@ -0,0 +1,36 @@ +.. highlight:: cpp + +.. _gentut-globalheader: + +The Global Header +================= + +Besides the information provided by the typesystem, the generator needs to +gather more data from the library headers containing the classes to be exposed +in Python. If there is a header that include all the others (or just one, as is +the case of **libfoo**) this could be passed directly to the generator. + +If such a file is not available, or only a subset of the library is desired, or +if some flags must be defined before parsing the library headers, then a +``global.h`` file must be provided. + +The use of a ``global.h`` file is preferred if some macros must be defined +before the parser gather data from the headers. For example, if ``NULL`` is not +defined and it is used as a default paramater for some constructor or method, +the parser will not recognize it. + +To solve this create a ``global.h`` including all the desired headers and the +defined (and undefined) flags as follows: + +**foobinding/data/global.h** +:: + + #undef QT_NO_STL + #undef QT_NO_STL_WCHAR + + #ifndef NULL + #define NULL 0 + #endif + + #include <foo.h> + |