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makefile: add function for computing relative paths

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This commit is contained in:
Stacey Sheldon 2012-10-05 20:52:07 -04:00
parent 40251afd6e
commit bc2080fec7
1 changed files with 4 additions and 0 deletions
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4
Makefile
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@ -7,6 +7,10 @@ TOOLS_DIR=$(ROOT_DIR)/tools
BUILD_DIR=$(ROOT_DIR)/build
DL_DIR=$(ROOT_DIR)/downloads
# Function for converting an absolute path to one relative
# to the top of the source tree.
toprel = $(subst $(realpath $(ROOT_DIR))/,,$(abspath $(1)))
# Clean out undesirable variables from the environment and command-line
# to remove the chance that they will cause problems with our build
define SANITIZE_VAR