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 16 CLANG_LEVEL := ../.. 17 include $(CLANG_LEVEL)/Makefile 18 19 CLANG_VERSION := $(word 3,$(shell grep "CLANG_VERSION " \ 20 $(PROJ_OBJ_DIR)/$(CLANG_LEVEL)/include/clang/Basic/Version.inc)) 21 22 ResourceDir := $(PROJ_OBJ_ROOT)/$(BuildMode)/lib/clang/$(CLANG_VERSION) 23 PROJ_resources := $(DESTDIR)$(PROJ_prefix)/lib/clang/$(CLANG_VERSION) 24 25 ResourceLibDir := $(ResourceDir)/lib 26 PROJ_resources_lib := $(PROJ_resources)/lib 27 28 # Expect compiler-rt to be in llvm/projects/compiler-rt 29 COMPILERRT_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. 64 ifneq ($(LLVM_CROSS_COMPILING),1) 65 ifneq ($(CLANG_NO_RUNTIME),1) 66 ifeq ($(shell test -d $(COMPILERRT_SRC_ROOT) && echo OK),OK) 67 68 # Select the compiler-rt configuration to use, and install directory. 69 # 70 # FIXME: Eventually, we want some kind of configure support for this. We want to 71 # build/install runtime libraries for as many targets as clang was configured to 72 # support. 73 RuntimeDirs := 74 ifeq ($(OS),Darwin) 75 RuntimeDirs += darwin 76 RuntimeLibrary.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 \ 80 ubsan_osx.a 81 endif 82 83 # On Linux, include a library which has all the runtime functions. 84 ifeq ($(OS),Linux) 85 RuntimeDirs += linux 86 RuntimeLibrary.linux.Configs := 87 88 # TryCompile compiler source flags 89 # Returns exit code of running a compiler invocation. 90 TryCompile = \ 91 $(shell \ 92 cflags=""; \ 93 for flag in $(3); do \ 94 cflags="$$cflags $$flag"; \ 95 done; \ 96 $(1) $$cflags $(2) -o /dev/null > /dev/null 2> /dev/null ; \ 97 echo $$?) 98 99 # We currently only try to generate runtime libraries on x86. 100 ifeq ($(ARCH),x86) 101 RuntimeLibrary.linux.Configs += \ 102 full-i386.a profile-i386.a asan-i386.a ubsan-i386.a 103 endif 104 105 ifeq ($(ARCH),x86_64) 106 RuntimeLibrary.linux.Configs += \ 107 full-x86_64.a profile-x86_64.a asan-x86_64.a tsan-x86_64.a msan-x86_64.a \ 108 ubsan-x86_64.a 109 # We need to build 32-bit ASan/UBsan libraries on 64-bit platform, and add them 110 # to the list of runtime libraries to make 111 # "clang -fsanitize=(address|undefined) -m32" work. 112 # We check that Clang can produce working 32-bit binaries by compiling a simple 113 # executable. 114 test_source = $(LLVM_SRC_ROOT)/tools/clang/runtime/compiler-rt/clang_linux_test_input.c 115 ifeq ($(call TryCompile,$(ToolDir)/clang,$(test_source),-m32),0) 116 RuntimeLibrary.linux.Configs += asan-i386.a ubsan-i386.a 117 endif 118 ifneq ($(LLVM_ANDROID_TOOLCHAIN_DIR),) 119 RuntimeLibrary.linux.Configs += asan-arm-android.so 120 endif 121 endif 122 123 endif 124 125 #### 126 # The build rules below are designed to be generic and should only need to be 127 # modified based on changes in the compiler-rt layout or build system. 128 #### 129 130 # Rule to build the compiler-rt libraries we need. 131 # 132 # We build all the libraries in a single shot to avoid recursive make as much as 133 # possible. 134 BuildRuntimeLibraries: 135 $(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \ 136 ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \ 137 ProjObjRoot=$(PROJ_OBJ_DIR) \ 138 CC="$(ToolDir)/clang" \ 139 LLVM_ANDROID_TOOLCHAIN_DIR="$(LLVM_ANDROID_TOOLCHAIN_DIR)" \ 140 $(RuntimeDirs:%=clang_%) 141 .PHONY: BuildRuntimeLibraries 142 CleanRuntimeLibraries: 143 $(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \ 144 ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \ 145 ProjObjRoot=$(PROJ_OBJ_DIR) \ 146 clean 147 .PHONY: CleanRuntimeLibraries 148 149 $(PROJ_resources_lib): 150 $(Verb) $(MKDIR) $@ 151 152 # Expand rules for copying/installing each individual library. We can't use 153 # implicit rules here because we need to match against multiple things. 154 define RuntimeLibraryTemplate 155 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a: BuildRuntimeLibraries 156 @true 157 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so: BuildRuntimeLibraries 158 @true 159 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib: BuildRuntimeLibraries 160 @true 161 .PRECIOUS: $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a 162 163 # Rule to copy the libraries to their resource directory location. 164 $(ResourceLibDir)/$1/libclang_rt.%.a: \ 165 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a \ 166 $(ResourceLibDir)/$1/.dir 167 $(Echo) Copying runtime library $1/$$* to build dir 168 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.a $$@ 169 $(ResourceLibDir)/$1/libclang_rt.%.so: \ 170 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so \ 171 $(ResourceLibDir)/$1/.dir 172 $(Echo) Copying runtime library $1/$$* to build dir 173 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.so $$@ 174 $(ResourceLibDir)/$1/libclang_rt.%.dylib: \ 175 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib \ 176 $(ResourceLibDir)/$1/.dir 177 $(Echo) Copying runtime library $1/$$* to build dir 178 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.dylib $$@ 179 $(Echo) Fixing LC_ID_DYLIB of $$@ 180 $(Verb) install_name_tool $$@ -id $$@ 181 RuntimeLibrary.$1: \ 182 $(RuntimeLibrary.$1.Configs:%=$(ResourceLibDir)/$1/libclang_rt.%) 183 .PHONY: RuntimeLibrary.$1 184 185 $(PROJ_resources_lib)/$1: $(PROJ_resources_lib) 186 $(Verb) $(MKDIR) $$@ 187 188 $(PROJ_resources_lib)/$1/libclang_rt.%.a: \ 189 $(ResourceLibDir)/$1/libclang_rt.%.a | $(PROJ_resources_lib)/$1 190 $(Echo) Installing compiler runtime library: $1/$$* 191 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 192 $(PROJ_resources_lib)/$1/libclang_rt.%.so: \ 193 $(ResourceLibDir)/$1/libclang_rt.%.so | $(PROJ_resources_lib)/$1 194 $(Echo) Installing compiler runtime library: $1/$$* 195 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 196 $(PROJ_resources_lib)/$1/libclang_rt.%.dylib: \ 197 $(ResourceLibDir)/$1/libclang_rt.%.dylib | $(PROJ_resources_lib)/$1 198 $(Echo) Installing compiler runtime library: $1/$$* 199 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 200 201 # Rule to install runtime libraries. 202 RuntimeLibraryInstall.$1: \ 203 $(RuntimeLibrary.$1.Configs:%=$(PROJ_resources_lib)/$1/libclang_rt.%) 204 .PHONY: RuntimeLibraryInstall.$1 205 endef 206 $(foreach lib,$(RuntimeDirs), $(eval $(call RuntimeLibraryTemplate,$(lib)))) 207 208 # Hook into the standard Makefile rules. 209 all-local:: $(RuntimeDirs:%=RuntimeLibrary.%) 210 install-local:: $(RuntimeDirs:%=RuntimeLibraryInstall.%) 211 clean-local:: CleanRuntimeLibraries 212 213 endif 214 endif 215 endif 216
