maint: Fix header includes once and for all

Previously #include statements were a bit of a mess across the codebase.
This commit is the result of a pass by the IWYU (Include What You Use)
tool, which suggests headers to add or remove based on what is in the
file, and can also suggest forward-declaring classes instead of
including their headers, if they are only used as a pointer in a
particular file. Cleaning this up should in general speed up compile
times.

IWYU isn't perfect, it produces a number of false positives, so we don't
try to automate this process and we don't accept all of its
recommendations. We do add a script and configuration file to the tools/
directory so that IWYU can be every so often in the future.

We also clean up all the includes according to a consistent style, which
is now described clearly in the C++ style guide.

1 files changed, 4 insertions, 3 deletions

diff --git a/gi/fundamental.h b/gi/fundamental.h
index aea7e35a..9756aaf2 100644
--- a/gi/fundamental.h
+++ b/gi/fundamental.h
@@ -25,13 +25,14 @@
 #ifndef GI_FUNDAMENTAL_H_
 #define GI_FUNDAMENTAL_H_
 
-#include <stdbool.h>
-#include <glib.h>
 #include <girepository.h>
+#include <glib-object.h>
+
+#include "gjs/jsapi-wrapper.h"
 
 #include "gi/wrapperutils.h"
-#include "gjs/jsapi-util.h"
 #include "gjs/macros.h"
+#include "util/log.h"
 
 class FundamentalPrototype;
 class FundamentalInstance;