0e7587a9ea
When a shared object is rebuilt, all dependent libraries and executables are rebuilt. Such rebuild is unnecessary when there is no interface change. With this patch, .toc files will be generated for all .so files. The rule which generates .toc files has ninja's restat=1 and .toc files are not changed ninja won't rebuild dependent targets. Performance: $ m && touch bionic/libc/stdio/stdio.c && time m Before: 1m03s (2563 targets) After: 21s (90 targets) Bug: 24597504 Change-Id: Ia5dd950273d143f4e99eee8bef7478f1a94cd138
66 lines
2.9 KiB
Makefile
66 lines
2.9 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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# Configuration for builds hosted on linux-x86.
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# Included by combo/select.mk
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ifeq ($(strip $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)),)
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$(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.15-4.8/bin/x86_64-linux-
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endif
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$(combo_2nd_arch_prefix)HOST_CC := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)gcc
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$(combo_2nd_arch_prefix)HOST_CXX := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)g++
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$(combo_2nd_arch_prefix)HOST_AR := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)ar
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$(combo_2nd_arch_prefix)HOST_READELF := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)readelf
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$(combo_2nd_arch_prefix)HOST_NM := $($(combo_2nd_arch_prefix)HOST_TOOLCHAIN_PREFIX)nm
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define $(combo_var_prefix)transform-shared-lib-to-toc
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$(call _gen_toc_command_for_elf,$(1),$(2))
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endef
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# gcc location for clang; to be updated when clang is updated
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$(combo_2nd_arch_prefix)HOST_TOOLCHAIN_FOR_CLANG := prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.15-4.8
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# We expect SSE3 floating point math.
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$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -msse3 -mfpmath=sse -m32 -Wa,--noexecstack -march=prescott
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$(combo_2nd_arch_prefix)HOST_GLOBAL_LDFLAGS += -m32 -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now
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ifneq ($(strip $(BUILD_HOST_static)),)
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# Statically-linked binaries are desirable for sandboxed environment
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$(combo_2nd_arch_prefix)HOST_GLOBAL_LDFLAGS += -static
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endif # BUILD_HOST_static
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$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -fPIC \
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-no-canonical-prefixes \
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$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fstack-protector
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# Workaround differences in inttypes.h between host and target.
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# See bug 12708004.
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$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -D__STDC_FORMAT_MACROS -D__STDC_CONSTANT_MACROS
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# We build a 32-bit host art, and right now that also means building *all* host libraries
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# both 32- and 64-bit (whether art uses them or not --- 9d59f417767991246848c3e101cb27d2dfea5988).
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$(combo_2nd_arch_prefix)HOST_GLOBAL_CFLAGS += -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE=1
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$(combo_2nd_arch_prefix)HOST_NO_UNDEFINED_LDFLAGS := -Wl,--no-undefined
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############################################################
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## Macros after this line are shared by the 64-bit config.
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# $(1): The file to check
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define get-file-size
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stat --format "%s" "$(1)" | tr -d '\n'
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endef
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