[Qemu-devel] [PATCH] Makefile: Fix problems in parallel builds

[Stefan Weil]

The build-all rule used to call make recursively to
avoid problems with a wrong build order in parallel makes
(config-host.h was sometimes built too late).

Most object files depend on config-host.h, so adding
the missing prerequisites now allows to avoid
recursive calls of make and to simplify the rule for
build-all.

A similar patch from Uri Lublin which fixed the
rule for qemu-img.o is no longer needed.

Signed-off-by: Stefan Weil <address@hidden>
---
 Makefile |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index c78d9ea..ae3532f 100644
--- a/Makefile
+++ b/Makefile
@@ -40,8 +40,7 @@ config-all-devices.mak: $(SUBDIR_DEVICES_MAK)
 
 -include config-all-devices.mak
 
-build-all: config-host.h config-all-devices.h $(DOCS) $(TOOLS)
-       $(call quiet-command, $(MAKE) $(SUBDIR_MAKEFLAGS) recurse-all,)
+build-all: $(DOCS) $(TOOLS) recurse-all
 
 config-host.h: config-host.h-timestamp
 config-host.h-timestamp: config-host.mak
@@ -207,9 +206,12 @@ bt-host.o: QEMU_CFLAGS += $(BLUEZ_CFLAGS)
 
 libqemu_common.a: $(obj-y)
 
+$(obj-y): config-host.h
+
 ######################################################################
 
 qemu-img.o: qemu-img-cmds.h
+qemu-img.o qemu-nbd.o qemu-io.o: config-host.h
 
 qemu-img$(EXESUF): qemu-img.o qemu-tool.o $(block-obj-y)
 
-- 
1.5.6.5