1f93043c86
With these adjustments, cached object files can now be shared across multiple Android trees on a single workstation: * Compiler binary modification time no longer causes cache misses, as a hash of the compiler binary is taken rather than looking at the mtime and size * Header file modification time no longer causes cache misses, the headers are now always hashed * Macros such as __DATE__ and __TIME__ no longer cause cache misses * All paths in preprocessed source (due to use of -g) are now relative These options require ccache 3.1 or later to be used; ccache 2.4 will ignore these. Change-Id: I7839637e9dacf7240bd9b7bfaa6406b1db423560 Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
99 lines
3.5 KiB
Makefile
99 lines
3.5 KiB
Makefile
#
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# Copyright (C) 2006 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# Select a combo based on the compiler being used.
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#
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# Inputs:
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# combo_target -- prefix for final variables (HOST_ or TARGET_)
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#
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# Build a target string like "linux-arm" or "darwin-x86".
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combo_os_arch := $($(combo_target)OS)-$($(combo_target)ARCH)
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# Set reasonable defaults for the various variables
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$(combo_target)CC := $(CC)
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$(combo_target)CXX := $(CXX)
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$(combo_target)AR := $(AR)
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$(combo_target)STRIP := $(STRIP)
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$(combo_target)BINDER_MINI := 0
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$(combo_target)HAVE_EXCEPTIONS := 0
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$(combo_target)HAVE_UNIX_FILE_PATH := 1
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$(combo_target)HAVE_WINDOWS_FILE_PATH := 0
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$(combo_target)HAVE_RTTI := 1
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$(combo_target)HAVE_CALL_STACKS := 1
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$(combo_target)HAVE_64BIT_IO := 1
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$(combo_target)HAVE_CLOCK_TIMERS := 1
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$(combo_target)HAVE_PTHREAD_RWLOCK := 1
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$(combo_target)HAVE_STRNLEN := 1
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$(combo_target)HAVE_STRERROR_R_STRRET := 1
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$(combo_target)HAVE_STRLCPY := 0
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$(combo_target)HAVE_STRLCAT := 0
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$(combo_target)HAVE_KERNEL_MODULES := 0
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$(combo_target)GLOBAL_CFLAGS := -fno-exceptions -Wno-multichar
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$(combo_target)RELEASE_CFLAGS := -O2 -g -fno-strict-aliasing
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$(combo_target)GLOBAL_LDFLAGS :=
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$(combo_target)GLOBAL_ARFLAGS := crsP
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$(combo_target)EXECUTABLE_SUFFIX :=
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$(combo_target)SHLIB_SUFFIX := .so
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$(combo_target)JNILIB_SUFFIX := $($(combo_target)SHLIB_SUFFIX)
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$(combo_target)STATIC_LIB_SUFFIX := .a
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# Now include the combo for this specific target.
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include $(BUILD_COMBOS)/$(combo_target)$(combo_os_arch).mk
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ifneq ($(USE_CCACHE),)
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# The default check uses size and modification time, causing false misses
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# since the mtime depends when the repo was checked out
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export CCACHE_COMPILERCHECK := content
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# See man page, optimizations to get more cache hits
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# implies that __DATE__ and __TIME__ are not critical for functionality.
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# Ignore include file modification time since it will depend on when
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# the repo was checked out
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export CCACHE_SLOPPINESS := time_macros,include_file_mtime,file_macro
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# Turn all preprocessor absolute paths into relative paths.
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# Fixes absolute paths in preprocessed source due to use of -g.
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# We don't really use system headers much so the rootdir is
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# fine; ensures these paths are relative for all Android trees
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# on a workstation.
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export CCACHE_BASEDIR := /
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CCACHE_HOST_TAG := $(HOST_PREBUILT_TAG)
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# If we are cross-compiling Windows binaries on Linux
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# then use the linux ccache binary instead.
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ifeq ($(HOST_OS)-$(BUILD_OS),windows-linux)
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CCACHE_HOST_TAG := linux-$(BUILD_ARCH)
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endif
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ccache := prebuilts/misc/$(CCACHE_HOST_TAG)/ccache/ccache
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# Check that the executable is here.
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ccache := $(strip $(wildcard $(ccache)))
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ifdef ccache
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# prepend ccache if necessary
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ifneq ($(ccache),$(firstword $($(combo_target)CC)))
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$(combo_target)CC := $(ccache) $($(combo_target)CC)
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endif
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ifneq ($(ccache),$(firstword $($(combo_target)CXX)))
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$(combo_target)CXX := $(ccache) $($(combo_target)CXX)
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endif
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ccache =
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endif
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endif
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