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| author | Peter Maydell <peter.maydell@linaro.org> | 2012-10-19 14:54:23 +0100 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2012-10-27 14:41:13 +0000 |
| commit | d1bd2423a90a144576cd140dc84b1fe8c7c8fda0 (patch) | |
| tree | 1a5464003a797897421486bdf7b659fc93a37ada | |
| parent | 49cdaea18b6a827fbe9555efef12821909e59229 (diff) | |
Makefile: Forbid out-of-tree build from a source tree that has been built in
If we try to do an out-of-tree build but the source tree we're building from
has been used in the past for an in-tree build then things will go
confusingly wrong. Specifically, some parts of the build process will pull
in generated files from the old in-tree build (because SRC_PATH is on
the vpath). Diagnose this situation so we can produce a useful error
message and tell the user how to fix it (run distclean in the source tree).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
| -rw-r--r-- | Makefile | 11 |
1 files changed, 11 insertions, 0 deletions
@@ -8,6 +8,17 @@ ifneq ($(wildcard config-host.mak),) # Put the all: rule here so that config-host.mak can contain dependencies. all: include config-host.mak + +# Check that we're not trying to do an out-of-tree build from +# a tree that's been used for an in-tree build. +ifneq ($(realpath $(SRC_PATH)),$(realpath .)) +ifneq ($(wildcard $(SRC_PATH)/config-host.mak),) +$(error This is an out of tree build but your source tree ($(SRC_PATH)) \ +seems to have been used for an in-tree build. You can fix this by running \ +"make distclean && rm -rf *-linux-user *-softmmu" in your source tree) +endif +endif + include $(SRC_PATH)/rules.mak config-host.mak: $(SRC_PATH)/configure @echo $@ is out-of-date, running configure |