[Qemu-devel] [PATCH] Put dependency files in proper subdir

[Jan Kiszka <jan.kiszka@web.de>]

From: Jan Kiszka <jan.kiszka@siemens.com>

This seems to resolve subtle breakages of our build system:

Dependency files generated for targets like 'dir/foo.o' were saved as
'foo.d'. Now, if there was also a target 'foo.o', one of the dependency
file was overwritten. Concrete example: libhw*/macio.o vs.
libhw*/ide/macio.o. And this often left a segfaulting build result
behind when changing the "wrong" data structures".

Fix it by generating proper 'dir/foo.d'.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 rules.mak |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/rules.mak b/rules.mak
index 7e10432..c843a13 100644
--- a/rules.mak
+++ b/rules.mak
@@ -12,7 +12,7 @@ MAKEFLAGS += -rR
 %.mak:

 # Flags for dependency generation
-QEMU_DGFLAGS += -MMD -MP -MT $@
+QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d

 %.o: %.c
 	$(call quiet-command,$(CC) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c
-o $@ $<,"  CC    $(TARGET_DIR)$@")
-- 
1.6.0.2