Include sysemu/sysemu.h a lot less

In my "build everything" tree, changing sysemu/sysemu.h triggers a
recompile of some 5400 out of 6600 objects (not counting tests and
objects that don't depend on qemu/osdep.h).

hw/qdev-core.h includes sysemu/sysemu.h since recent commit e965ffa70a
"qdev: add qdev_add_vm_change_state_handler()".  This is a bad idea:
hw/qdev-core.h is widely included.

Move the declaration of qdev_add_vm_change_state_handler() to
sysemu/sysemu.h, and drop the problematic include from hw/qdev-core.h.

Touching sysemu/sysemu.h now recompiles some 1800 objects.
qemu/uuid.h also drops from 5400 to 1800.  A few more headers show
smaller improvement: qemu/notify.h drops from 5600 to 5200,
qemu/timer.h from 5600 to 4500, and qapi/qapi-types-run-state.h from
5500 to 5000.

Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20190812052359.30071-28-armbru@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/hw/arm/stm32f205_soc.c b/hw/arm/stm32f205_soc.c
index be8b7df679..f5a5c2d80c 100644
--- a/hw/arm/stm32f205_soc.c
+++ b/hw/arm/stm32f205_soc.c
@@ -29,6 +29,7 @@
 #include "exec/address-spaces.h"
 #include "hw/arm/stm32f205_soc.h"
 #include "hw/qdev-properties.h"
+#include "sysemu/sysemu.h"
 
 /* At the moment only Timer 2 to 5 are modelled */
 static const uint32_t timer_addr[STM_NUM_TIMERS] = { 0x40000000, 0x40000400,