Makefile revision f2f3ce54fc1235bec2d0d0b0ef3b53bdff6d9655
1##===- clang/runtime/compiler-rt/Makefile ------------------*- Makefile -*-===## 2# 3# The LLVM Compiler Infrastructure 4# 5# This file is distributed under the University of Illinois Open Source 6# License. See LICENSE.TXT for details. 7# 8##===----------------------------------------------------------------------===## 9# 10# This file defines support for building the Clang runtime libraries (which are 11# implemented by compiler-rt) and placing them in the proper locations in the 12# Clang resources directory (i.e., where the driver expects them). 13# 14##===----------------------------------------------------------------------===## 15 16CLANG_LEVEL := ../.. 17include $(CLANG_LEVEL)/Makefile 18 19CLANG_VERSION := $(word 3,$(shell grep "CLANG_VERSION " \ 20 $(PROJ_OBJ_DIR)/$(CLANG_LEVEL)/include/clang/Basic/Version.inc)) 21 22ResourceDir := $(PROJ_OBJ_ROOT)/$(BuildMode)/lib/clang/$(CLANG_VERSION) 23PROJ_resources := $(DESTDIR)$(PROJ_prefix)/lib/clang/$(CLANG_VERSION) 24 25ResourceLibDir := $(ResourceDir)/lib 26PROJ_resources_lib := $(PROJ_resources)/lib 27 28# Expect compiler-rt to be in llvm/projects/compiler-rt 29COMPILERRT_SRC_ROOT := $(LLVM_SRC_ROOT)/projects/compiler-rt 30 31# We don't currently support building runtime libraries when we are 32# cross-compiling. The issue is that we really want to be set up so that the 33# available compiler targets are independent of the current build. 34# 35# Since we have to build the runtime libraries for the target, it requires we 36# have a cross compiler from the build machine to the target. Although in the 37# case where for the current build (host == target), we do have such a cross 38# compiler, but not defined in a way that is easy for us to reuse. Regardless, 39# that also wouldn't help for other possible compiler configurations. 40# 41# Thus, the simple set up we currently use is to assume that we will be using 42# the just built Clang to compile the compiler-rt libraries. As we grow better 43# cross compilation support inside Clang and tool support in LLVM, this makes it 44# easier for us to achieve the goal of having the compiler targets be easily 45# selected at configure time. However, this design does currently preclude the 46# building of compiler-rt libraries when the Clang itself is being cross 47# compiled. 48# 49# There are three possible solutions: 50# 1. Require building a build-target version of Clang when cross compiling. This 51# is simplest, but als greatly increases the build time of cross builds. 52# 53# 2. Require cross builds have a build-target version of Clang available for 54# use. This is a reasonable compromise on #1, as the compiler-rt libraries 55# are simple enough that there is not a strong desire to ensure they are 56# built with the exact version of Clang being used. Similarly, as Clang 57# becomes a better cross compiler it is also increasingly more likely that 58# the cross compiler being used will already be a version of Clang. 59# 60# 3. Come up with an alternate mechanism to define all the toolchain 61# information that compiler-rt would need to build libraries for all the 62# requested targets. This might be a simple short term solution, but is 63# likely to be unwieldly and irritating to maintain in the long term. 64ifneq ($(LLVM_CROSS_COMPILING),1) 65ifneq ($(CLANG_NO_RUNTIME),1) 66ifeq ($(shell test -d $(COMPILERRT_SRC_ROOT) && echo OK),OK) 67 68# Select the compiler-rt configuration to use, and install directory. 69# 70# FIXME: Eventually, we want some kind of configure support for this. We want to 71# build/install runtime libraries for as many targets as clang was configured to 72# support. 73RuntimeDirs := 74ifeq ($(OS),Darwin) 75RuntimeDirs += darwin 76RuntimeLibrary.darwin.Configs := \ 77 eprintf.a 10.4.a osx.a ios.a cc_kext.a cc_kext_ios5.a \ 78 asan_osx.a asan_osx_dynamic.dylib \ 79 profile_osx.a profile_ios.a 80endif 81 82# On Linux, include a library which has all the runtime functions. 83ifeq ($(OS),Linux) 84RuntimeDirs += linux 85RuntimeLibrary.linux.Configs := 86 87# We currently only try to generate runtime libraries on x86. 88ifeq ($(ARCH),x86) 89RuntimeLibrary.linux.Configs += \ 90 full-i386.a profile-i386.a asan-i386.a 91endif 92ifeq ($(ARCH),x86_64) 93RuntimeLibrary.linux.Configs += \ 94 full-x86_64.a profile-x86_64.a asan-x86_64.a tsan-x86_64.a 95endif 96 97endif 98 99#### 100# The build rules below are designed to be generic and should only need to be 101# modified based on changes in the compiler-rt layout or build system. 102#### 103 104# Rule to build the compiler-rt libraries we need. 105# 106# We build all the libraries in a single shot to avoid recursive make as much as 107# possible. 108BuildRuntimeLibraries: 109 $(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \ 110 ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \ 111 ProjObjRoot=$(PROJ_OBJ_DIR) \ 112 CC="$(ToolDir)/clang" \ 113 $(RuntimeDirs:%=clang_%) 114.PHONY: BuildRuntimeLibraries 115CleanRuntimeLibraries: 116 $(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \ 117 ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \ 118 ProjObjRoot=$(PROJ_OBJ_DIR) \ 119 clean 120.PHONY: CleanRuntimeLibraries 121 122$(PROJ_resources_lib): 123 $(Verb) $(MKDIR) $@ 124 125# Expand rules for copying/installing each individual library. We can't use 126# implicit rules here because we need to match against multiple things. 127define RuntimeLibraryTemplate 128$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a: BuildRuntimeLibraries 129 @true 130$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so: BuildRuntimeLibraries 131 @true 132$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib: BuildRuntimeLibraries 133 @true 134.PRECIOUS: $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a 135 136# Rule to copy the libraries to their resource directory location. 137$(ResourceLibDir)/$1/libclang_rt.%.a: \ 138 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a \ 139 $(ResourceLibDir)/$1/.dir 140 $(Echo) Copying runtime library $1/$$* to build dir 141 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.a $$@ 142$(ResourceLibDir)/$1/libclang_rt.%.so: \ 143 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so \ 144 $(ResourceLibDir)/$1/.dir 145 $(Echo) Copying runtime library $1/$$* to build dir 146 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.so $$@ 147$(ResourceLibDir)/$1/libclang_rt.%.dylib: \ 148 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib \ 149 $(ResourceLibDir)/$1/.dir 150 $(Echo) Copying runtime library $1/$$* to build dir 151 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.dylib $$@ 152 $(Echo) Fixing LC_ID_DYLIB of $$@ 153 $(Verb) install_name_tool $$@ -id $$@ 154RuntimeLibrary.$1: \ 155 $(RuntimeLibrary.$1.Configs:%=$(ResourceLibDir)/$1/libclang_rt.%) 156.PHONY: RuntimeLibrary.$1 157 158$(PROJ_resources_lib)/$1: $(PROJ_resources_lib) 159 $(Verb) $(MKDIR) $$@ 160 161$(PROJ_resources_lib)/$1/libclang_rt.%.a: \ 162 $(ResourceLibDir)/$1/libclang_rt.%.a | $(PROJ_resources_lib)/$1 163 $(Echo) Installing compiler runtime library: $1/$$* 164 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 165$(PROJ_resources_lib)/$1/libclang_rt.%.so: \ 166 $(ResourceLibDir)/$1/libclang_rt.%.so | $(PROJ_resources_lib)/$1 167 $(Echo) Installing compiler runtime library: $1/$$* 168 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 169$(PROJ_resources_lib)/$1/libclang_rt.%.dylib: \ 170 $(ResourceLibDir)/$1/libclang_rt.%.dylib | $(PROJ_resources_lib)/$1 171 $(Echo) Installing compiler runtime library: $1/$$* 172 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 173 174# Rule to install runtime libraries. 175RuntimeLibraryInstall.$1: \ 176 $(RuntimeLibrary.$1.Configs:%=$(PROJ_resources_lib)/$1/libclang_rt.%) 177.PHONY: RuntimeLibraryInstall.$1 178endef 179$(foreach lib,$(RuntimeDirs), $(eval $(call RuntimeLibraryTemplate,$(lib)))) 180 181# Hook into the standard Makefile rules. 182all-local:: $(RuntimeDirs:%=RuntimeLibrary.%) 183install-local:: $(RuntimeDirs:%=RuntimeLibraryInstall.%) 184clean-local:: CleanRuntimeLibraries 185 186endif 187endif 188endif 189