38c75f863a
libcamera will enable -Wmissing-declarations to catch mismatches between function declarations and definitions. There is one offender in log.h: when a category is defined with LOG_DEFINE_CATEGORY(), it generates a function with no declaration. Fix it by declaring the function using LOG_DECLARE_CATEGORY() as the first step of the category definition. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>