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| author | Ying Wang <wangying@google.com> | 2015-02-26 18:47:21 -0800 |
|---|---|---|
| committer | Ying Wang <wangying@google.com> | 2015-02-26 18:47:21 -0800 |
| commit | e25b3984ff5c74aa2a49d14b7df7aa9527096c32 (patch) | |
| tree | f291e33696b6dbd110b9c1eca922c8ba33b84161 /core/executable_prefer_symlink.mk | |
| parent | 7a9e38840536b291688f4e3a0989acaa56af3191 (diff) | |
| download | build-e25b3984ff5c74aa2a49d14b7df7aa9527096c32.zip build-e25b3984ff5c74aa2a49d14b7df7aa9527096c32.tar.gz build-e25b3984ff5c74aa2a49d14b7df7aa9527096c32.tar.bz2 | |
Improved nothing-to-do-build
- Removed unnecessary dependency of
"$(my_symlink) : $(LOCAL_INSTALLED_MODULE)"
We can generate symlink to nonexistent file.
Actually in multilib build $(LOCAL_INSTALLED_MODULE) points to file
that may not be the target file of the symlink and leads to always
obsolete $(my_symlink) in the above dependnecy.
- Touch by-product in the dummy rule, to make sure the by-product is
newer than the main-product.
Change-Id: I2f0e0cc197c49f920fa1f6794083b21cdc333c20
Diffstat (limited to 'core/executable_prefer_symlink.mk')
| -rw-r--r-- | core/executable_prefer_symlink.mk | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/core/executable_prefer_symlink.mk b/core/executable_prefer_symlink.mk index 2326e83..fc97ad3 100644 --- a/core/executable_prefer_symlink.mk +++ b/core/executable_prefer_symlink.mk @@ -39,7 +39,10 @@ $(my_symlink): PRIVATE_SRC_BINARY_NAME := $(LOCAL_MODULE_STEM_32) endif endif -$(my_symlink): $(LOCAL_INSTALLED_MODULE) $(LOCAL_MODULE_MAKEFILE) +# $(my_symlink) doesn't need to depend on $(PRIVATE_SRC_BINARY_NAME): we can generate symlink to nonexistent file. +# If you add the dependency, make would compare the timestamp of a file against that of its symlink: +# they are always equal, because make follows symlink. +$(my_symlink): $(LOCAL_MODULE_MAKEFILE) @echo "Symlink: $@ -> $(PRIVATE_SRC_BINARY_NAME)" @mkdir -p $(dir $@) @rm -rf $@ |