Makefile revision 7a0c064770355a4918df69f95de8dea6338a59a2
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# TryCompile compiler source flags 88# Returns exit code of running a compiler invocation. 89TryCompile = \ 90 $(shell \ 91 cflags=""; \ 92 for flag in $(3); do \ 93 cflags="$$cflags $$flag"; \ 94 done; \ 95 $(1) $$cflags $(2) -o /dev/null > /dev/null 2> /dev/null ; \ 96 echo $$?) 97 98# We currently only try to generate runtime libraries on x86. 99ifeq ($(ARCH),x86) 100RuntimeLibrary.linux.Configs += \ 101 full-i386.a profile-i386.a asan-i386.a 102endif 103 104ifeq ($(ARCH),x86_64) 105RuntimeLibrary.linux.Configs += \ 106 full-x86_64.a profile-x86_64.a asan-x86_64.a tsan-x86_64.a 107# We need to build 32-bit ASan library on 64-bit platform, and add it to the 108# list of runtime libraries to make "clang -faddress-sanitizer -m32" work. 109# We check that Clang can produce working 32-bit binaries by compiling a simple 110# executable. 111test_source = $(LLVM_SRC_ROOT)/tools/clang/runtime/compiler-rt/clang_linux_test_input.c 112ifeq ($(call TryCompile,$(ToolDir)/clang,$(test_source),-m32),0) 113RuntimeLibrary.linux.Configs += asan-i386.a 114endif 115endif 116 117endif 118 119#### 120# The build rules below are designed to be generic and should only need to be 121# modified based on changes in the compiler-rt layout or build system. 122#### 123 124# Rule to build the compiler-rt libraries we need. 125# 126# We build all the libraries in a single shot to avoid recursive make as much as 127# possible. 128BuildRuntimeLibraries: 129 $(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \ 130 ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \ 131 ProjObjRoot=$(PROJ_OBJ_DIR) \ 132 CC="$(ToolDir)/clang" \ 133 $(RuntimeDirs:%=clang_%) 134.PHONY: BuildRuntimeLibraries 135CleanRuntimeLibraries: 136 $(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \ 137 ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \ 138 ProjObjRoot=$(PROJ_OBJ_DIR) \ 139 clean 140.PHONY: CleanRuntimeLibraries 141 142$(PROJ_resources_lib): 143 $(Verb) $(MKDIR) $@ 144 145# Expand rules for copying/installing each individual library. We can't use 146# implicit rules here because we need to match against multiple things. 147define RuntimeLibraryTemplate 148$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a: BuildRuntimeLibraries 149 @true 150$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so: BuildRuntimeLibraries 151 @true 152$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib: BuildRuntimeLibraries 153 @true 154.PRECIOUS: $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a 155 156# Rule to copy the libraries to their resource directory location. 157$(ResourceLibDir)/$1/libclang_rt.%.a: \ 158 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a \ 159 $(ResourceLibDir)/$1/.dir 160 $(Echo) Copying runtime library $1/$$* to build dir 161 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.a $$@ 162$(ResourceLibDir)/$1/libclang_rt.%.so: \ 163 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so \ 164 $(ResourceLibDir)/$1/.dir 165 $(Echo) Copying runtime library $1/$$* to build dir 166 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.so $$@ 167$(ResourceLibDir)/$1/libclang_rt.%.dylib: \ 168 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib \ 169 $(ResourceLibDir)/$1/.dir 170 $(Echo) Copying runtime library $1/$$* to build dir 171 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.dylib $$@ 172 $(Echo) Fixing LC_ID_DYLIB of $$@ 173 $(Verb) install_name_tool $$@ -id $$@ 174RuntimeLibrary.$1: \ 175 $(RuntimeLibrary.$1.Configs:%=$(ResourceLibDir)/$1/libclang_rt.%) 176.PHONY: RuntimeLibrary.$1 177 178$(PROJ_resources_lib)/$1: $(PROJ_resources_lib) 179 $(Verb) $(MKDIR) $$@ 180 181$(PROJ_resources_lib)/$1/libclang_rt.%.a: \ 182 $(ResourceLibDir)/$1/libclang_rt.%.a | $(PROJ_resources_lib)/$1 183 $(Echo) Installing compiler runtime library: $1/$$* 184 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 185$(PROJ_resources_lib)/$1/libclang_rt.%.so: \ 186 $(ResourceLibDir)/$1/libclang_rt.%.so | $(PROJ_resources_lib)/$1 187 $(Echo) Installing compiler runtime library: $1/$$* 188 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 189$(PROJ_resources_lib)/$1/libclang_rt.%.dylib: \ 190 $(ResourceLibDir)/$1/libclang_rt.%.dylib | $(PROJ_resources_lib)/$1 191 $(Echo) Installing compiler runtime library: $1/$$* 192 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 193 194# Rule to install runtime libraries. 195RuntimeLibraryInstall.$1: \ 196 $(RuntimeLibrary.$1.Configs:%=$(PROJ_resources_lib)/$1/libclang_rt.%) 197.PHONY: RuntimeLibraryInstall.$1 198endef 199$(foreach lib,$(RuntimeDirs), $(eval $(call RuntimeLibraryTemplate,$(lib)))) 200 201# Hook into the standard Makefile rules. 202all-local:: $(RuntimeDirs:%=RuntimeLibrary.%) 203install-local:: $(RuntimeDirs:%=RuntimeLibraryInstall.%) 204clean-local:: CleanRuntimeLibraries 205 206endif 207endif 208endif 209