1 # 2 # Copyright (C) 2015 The Android Open Source Project 3 # 4 # Licensed under the Apache License, Version 2.0 (the "License"); 5 # you may not use this file except in compliance with the License. 6 # You may obtain a copy of the License at 7 # 8 # http://www.apache.org/licenses/LICENSE-2.0 9 # 10 # Unless required by applicable law or agreed to in writing, software 11 # distributed under the License is distributed on an "AS IS" BASIS, 12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 # See the License for the specific language governing permissions and 14 # limitations under the License. 15 # 16 17 ifneq ($(USE_CCACHE),) 18 # The default check uses size and modification time, causing false misses 19 # since the mtime depends when the repo was checked out 20 export CCACHE_COMPILERCHECK := content 21 22 # See man page, optimizations to get more cache hits 23 # implies that __DATE__ and __TIME__ are not critical for functionality. 24 # Ignore include file modification time since it will depend on when 25 # the repo was checked out 26 export CCACHE_SLOPPINESS := time_macros,include_file_mtime,file_macro 27 28 # Turn all preprocessor absolute paths into relative paths. 29 # Fixes absolute paths in preprocessed source due to use of -g. 30 # We don't really use system headers much so the rootdir is 31 # fine; ensures these paths are relative for all Android trees 32 # on a workstation. 33 export CCACHE_BASEDIR := / 34 35 # Workaround for ccache with clang. 36 # See http://petereisentraut.blogspot.com/2011/09/ccache-and-clang-part-2.html 37 export CCACHE_CPP2 := true 38 39 CCACHE_HOST_TAG := $(HOST_PREBUILT_TAG) 40 # If we are cross-compiling Windows binaries on Linux 41 # then use the linux ccache binary instead. 42 ifeq ($(HOST_OS)-$(BUILD_OS),windows-linux) 43 CCACHE_HOST_TAG := linux-$(HOST_PREBUILT_ARCH) 44 endif 45 ccache := prebuilts/misc/$(CCACHE_HOST_TAG)/ccache/ccache 46 # Check that the executable is here. 47 ccache := $(strip $(wildcard $(ccache))) 48 ifdef ccache 49 ifndef CC_WRAPPER 50 CC_WRAPPER := $(ccache) 51 endif 52 ifndef CXX_WRAPPER 53 CXX_WRAPPER := $(ccache) 54 endif 55 ccache = 56 endif 57 endif 58
