py: libcamera: Move function declarations to common header

The init_py_*() functions are called by the top-level entry point of the
libcamera Python module to initialize different parts of the bindings.
They are declared in py_main.cpp where they are called, and defined in
separate compilation units. This results in functions being defined
without a corresponding declaration, and will generate warnings when we
enable -Wmissing-declarations.

Fix this by moving the function declarations from py_main.c to
py_main.h, and including py_main.h in the various compilation units that
need it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/py/libcamera/py_color_space.cpp

@@ -12,6 +12,8 @@
 #include <pybind11/pybind11.h>
 #include <pybind11/stl.h>
 
+#include "py_main.h"
+
 namespace py = pybind11;
 
 using namespace libcamera;

src/py/libcamera/py_controls_generated.cpp.in

@@ -11,6 +11,8 @@
 
 #include <pybind11/pybind11.h>
 
+#include "py_main.h"
+
 namespace py = pybind11;
 
 class PyControls

src/py/libcamera/py_enums.cpp

@@ -9,6 +9,8 @@
 
 #include <pybind11/pybind11.h>
 
+#include "py_main.h"
+
 namespace py = pybind11;
 
 using namespace libcamera;

src/py/libcamera/py_formats_generated.cpp.in

@@ -11,6 +11,8 @@
 
 #include <pybind11/pybind11.h>
 
+#include "py_main.h"
+
 namespace py = pybind11;
 
 class PyFormats

src/py/libcamera/py_geometry.cpp

@@ -14,6 +14,8 @@
 #include <pybind11/pybind11.h>
 #include <pybind11/stl.h>
 
+#include "py_main.h"
+
 namespace py = pybind11;
 
 using namespace libcamera;

src/py/libcamera/py_main.cpp

@@ -85,14 +85,6 @@ PYBIND11_DECLARE_HOLDER_TYPE(T, PyCameraSmartPtr<T>)
  */
 static std::weak_ptr<PyCameraManager> gCameraManager;
 
-void init_py_color_space(py::module &m);
-void init_py_controls_generated(py::module &m);
-void init_py_enums(py::module &m);
-void init_py_formats_generated(py::module &m);
-void init_py_geometry(py::module &m);
-void init_py_properties_generated(py::module &m);
-void init_py_transform(py::module &m);
-
 PYBIND11_MODULE(_libcamera, m)
 {
 	init_py_enums(m);

src/py/libcamera/py_main.h

@@ -7,8 +7,18 @@
 
 #include <libcamera/base/log.h>
 
+#include <pybind11/pybind11.h>
+
 namespace libcamera {
 
 LOG_DECLARE_CATEGORY(Python)
 
 }
+
+void init_py_color_space(pybind11::module &m);
+void init_py_controls_generated(pybind11::module &m);
+void init_py_enums(pybind11::module &m);
+void init_py_formats_generated(pybind11::module &m);
+void init_py_geometry(pybind11::module &m);
+void init_py_properties_generated(pybind11::module &m);
+void init_py_transform(pybind11::module &m);

src/py/libcamera/py_properties_generated.cpp.in

@@ -11,6 +11,8 @@
 
 #include <pybind11/pybind11.h>
 
+#include "py_main.h"
+
 namespace py = pybind11;
 
 class PyProperties

src/py/libcamera/py_transform.cpp

@@ -12,6 +12,8 @@
 #include <pybind11/pybind11.h>
 #include <pybind11/stl.h>
 
+#include "py_main.h"
+
 namespace py = pybind11;
 
 using namespace libcamera;