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[Qemu-devel] [PATCH] Makefile.target: include top level build dir in vpa
From: |
Michael Marineau |
Subject: |
[Qemu-devel] [PATCH] Makefile.target: include top level build dir in vpath |
Date: |
Sun, 23 Aug 2015 17:57:55 -0700 |
Using ccache with CCACHE_BASEDIR set to $(SRC_PATH) or a parent will
rewrite all absolute paths to relative paths. This interacts poorly with
QEMU's two-level build directory scheme. For example, lets say
BUILD_DIR=$(SRC_PATH)/build so build/blockdev.d will contain:
blockdev.o: ../blockdev.c ../include/sysemu/block-backend.h \
Now the target build under build/x86_64-softmmu or similar will depend
on ../blockdev.o which in turn will get make to source ../blockdev.d to
check its dependencies. Since make always considers paths relative to
the current working directory rather than the makefile the path appeared
in the relative path to ../blockdev.c is useless.
This change simply adds the top level build directory to vpath so paths
relative to the source directory, top build directory, and target build
directory all work just fine.
Signed-off-by: Michael Marineau <address@hidden>
---
This is a re-send with the proper Signed-off-by line.
Makefile.target | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Makefile.target b/Makefile.target
index 3e7aafd..dc32294 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -7,7 +7,7 @@ include config-target.mak
include config-devices.mak
include $(SRC_PATH)/rules.mak
-$(call set-vpath, $(SRC_PATH))
+$(call set-vpath, $(SRC_PATH):$(BUILD_DIR))
ifdef CONFIG_LINUX
QEMU_CFLAGS += -I../linux-headers
endif
--
2.4.6