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 ResourceIncludeDir := $(ResourceDir)/include 27 PROJ_resources_lib := $(PROJ_resources)/lib 28 PROJ_resources_include := $(PROJ_resources)/include 29 30 # Expect compiler-rt to be in llvm/projects/compiler-rt 31 COMPILERRT_SRC_ROOT := $(LLVM_SRC_ROOT)/projects/compiler-rt 32 33 # We don't currently support building runtime libraries when we are 34 # cross-compiling. The issue is that we really want to be set up so that the 35 # available compiler targets are independent of the current build. 36 # 37 # Since we have to build the runtime libraries for the target, it requires we 38 # have a cross compiler from the build machine to the target. Although in the 39 # case where for the current build (host == target), we do have such a cross 40 # compiler, but not defined in a way that is easy for us to reuse. Regardless, 41 # that also wouldn't help for other possible compiler configurations. 42 # 43 # Thus, the simple set up we currently use is to assume that we will be using 44 # the just built Clang to compile the compiler-rt libraries. As we grow better 45 # cross compilation support inside Clang and tool support in LLVM, this makes it 46 # easier for us to achieve the goal of having the compiler targets be easily 47 # selected at configure time. However, this design does currently preclude the 48 # building of compiler-rt libraries when the Clang itself is being cross 49 # compiled. 50 # 51 # There are three possible solutions: 52 # 1. Require building a build-target version of Clang when cross compiling. This 53 # is simplest, but als greatly increases the build time of cross builds. 54 # 55 # 2. Require cross builds have a build-target version of Clang available for 56 # use. This is a reasonable compromise on #1, as the compiler-rt libraries 57 # are simple enough that there is not a strong desire to ensure they are 58 # built with the exact version of Clang being used. Similarly, as Clang 59 # becomes a better cross compiler it is also increasingly more likely that 60 # the cross compiler being used will already be a version of Clang. 61 # 62 # 3. Come up with an alternate mechanism to define all the toolchain 63 # information that compiler-rt would need to build libraries for all the 64 # requested targets. This might be a simple short term solution, but is 65 # likely to be unwieldy and irritating to maintain in the long term. 66 ifneq ($(LLVM_CROSS_COMPILING),1) 67 ifneq ($(CLANG_NO_RUNTIME),1) 68 ifeq ($(shell test -d $(COMPILERRT_SRC_ROOT) && echo OK),OK) 69 70 # Select the compiler-rt configuration to use, and install directory. 71 # 72 # FIXME: Eventually, we want some kind of configure support for this. We want to 73 # build/install runtime libraries for as many targets as clang was configured to 74 # support. 75 RuntimeDirs := 76 ifeq ($(OS),Darwin) 77 RuntimeDirs += darwin macho_embedded 78 RuntimeLibrary.darwin.Configs := \ 79 eprintf.a 10.4.a osx.a cc_kext.a \ 80 asan_osx_dynamic.dylib \ 81 profile_osx.a \ 82 ubsan_osx_dynamic.dylib 83 84 IOS_SDK := $(shell xcrun --show-sdk-path -sdk iphoneos 2> /dev/null) 85 IOSSIM_SDK := $(shell xcrun --show-sdk-path -sdk iphonesimulator 2> /dev/null) 86 87 ifneq ($(IOS_SDK)$(IOSSIM_SDK),) 88 RuntimeLibrary.darwin.Configs += ios.a profile_ios.a 89 endif 90 91 ifneq ($(IOS_SDK),) 92 ifneq (,$(filter ARM AARCH64,$(TARGETS_TO_BUILD))) 93 RuntimeLibrary.darwin.Configs += cc_kext_ios.a 94 endif 95 endif 96 97 ifneq ($(IOSSIM_SDK),) 98 RuntimeLibrary.darwin.Configs += asan_iossim_dynamic.dylib \ 99 ubsan_iossim_dynamic.dylib 100 endif 101 102 RuntimeLibrary.macho_embedded.Configs := \ 103 hard_static.a hard_pic.a 104 ifneq (,$(findstring ARM,$(TARGETS_TO_BUILD))) 105 RuntimeLibrary.macho_embedded.Configs += \ 106 soft_static.a soft_pic.a 107 endif 108 endif 109 110 # On Linux, include a library which has all the runtime functions. 111 ifeq ($(OS),Linux) 112 RuntimeDirs += linux 113 RuntimeLibrary.linux.Configs := 114 115 # TryCompile compiler source flags 116 # Returns exit code of running a compiler invocation. 117 TryCompile = \ 118 $(shell \ 119 cflags=""; \ 120 for flag in $(3); do \ 121 cflags="$$cflags $$flag"; \ 122 done; \ 123 $(1) $$cflags $(2) -o /dev/null > /dev/null 2> /dev/null ; \ 124 echo $$?) 125 126 # We try to build 32-bit runtimes both on 32-bit hosts and 64-bit hosts. 127 Runtime32BitConfigs = \ 128 builtins-i386.a profile-i386.a 129 130 # We currently only try to generate runtime libraries on x86. 131 ifeq ($(ARCH),x86) 132 RuntimeLibrary.linux.Configs += $(Runtime32BitConfigs) 133 endif 134 135 ifeq ($(ARCH),x86_64) 136 RuntimeLibrary.linux.Configs += \ 137 builtins-x86_64.a profile-x86_64.a 138 # We need to build 32-bit libraries on 64-bit platform, and add them 139 # to the list of runtime libraries to make "clang -m32" work. 140 # We check that Clang can produce working 32-bit binaries by compiling a simple 141 # executable. 142 test_source = $(LLVM_SRC_ROOT)/tools/clang/runtime/compiler-rt/clang_linux_test_input.c 143 ifeq ($(call TryCompile,$(ToolDir)/clang,$(test_source),-m32),0) 144 RuntimeLibrary.linux.Configs += $(Runtime32BitConfigs) 145 endif 146 endif 147 148 endif 149 150 #### 151 # The build rules below are designed to be generic and should only need to be 152 # modified based on changes in the compiler-rt layout or build system. 153 #### 154 155 # Rule to build the compiler-rt libraries we need. 156 # 157 # We build all the libraries in a single shot to avoid recursive make as much as 158 # possible. 159 BuildRuntimeLibraries: 160 $(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \ 161 ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \ 162 ProjObjRoot=$(PROJ_OBJ_DIR) \ 163 CC="$(ToolDir)/clang" \ 164 VERBOSE=$(VERBOSE) \ 165 $(RuntimeDirs:%=clang_%) 166 .PHONY: BuildRuntimeLibraries 167 CleanRuntimeLibraries: 168 $(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \ 169 ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \ 170 ProjObjRoot=$(PROJ_OBJ_DIR) \ 171 VERBOSE=$(VERBOSE) \ 172 clean 173 .PHONY: CleanRuntimeLibraries 174 RuntimeHeader: $(ResourceIncludeDir)/sanitizer 175 176 $(PROJ_resources_lib): 177 $(Verb) $(MKDIR) $@ 178 179 $(ResourceIncludeDir): 180 $(Verb) $(MKDIR) $@ 181 182 $(ResourceIncludeDir)/sanitizer: $(ResourceIncludeDir) 183 $(Verb) $(MKDIR) $@ 184 $(Verb) cp $(COMPILERRT_SRC_ROOT)/include/sanitizer/*.h $@ 185 186 # Expand rules for copying/installing each individual library. We can't use 187 # implicit rules here because we need to match against multiple things. 188 define RuntimeLibraryTemplate 189 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a: BuildRuntimeLibraries 190 @true 191 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so: BuildRuntimeLibraries 192 @true 193 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib: BuildRuntimeLibraries 194 @true 195 .PRECIOUS: $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a 196 197 # Rule to copy the libraries to their resource directory location. 198 $(ResourceLibDir)/$1/libclang_rt.%.a: \ 199 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a \ 200 $(ResourceLibDir)/$1/.dir 201 $(Echo) Copying runtime library $1/$$* to build dir 202 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.a $$@ 203 $(ResourceLibDir)/$1/libclang_rt.%.so: \ 204 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so \ 205 $(ResourceLibDir)/$1/.dir 206 $(Echo) Copying runtime library $1/$$* to build dir 207 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.so $$@ 208 $(ResourceLibDir)/$1/libclang_rt.%.dylib: \ 209 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib \ 210 $(ResourceLibDir)/$1/.dir 211 $(Echo) Copying runtime library $1/$$* to build dir 212 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.dylib $$@ 213 RuntimeLibrary.$1: \ 214 $(RuntimeLibrary.$1.Configs:%=$(ResourceLibDir)/$1/libclang_rt.%) 215 .PHONY: RuntimeLibrary.$1 216 217 $(PROJ_resources_lib)/$1: $(PROJ_resources_lib) 218 $(Verb) $(MKDIR) $$@ 219 220 $(PROJ_resources_lib)/$1/libclang_rt.%.a: \ 221 $(ResourceLibDir)/$1/libclang_rt.%.a | $(PROJ_resources_lib)/$1 222 $(Echo) Installing compiler runtime library: $1/$$* 223 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 224 $(PROJ_resources_lib)/$1/libclang_rt.%.so: \ 225 $(ResourceLibDir)/$1/libclang_rt.%.so | $(PROJ_resources_lib)/$1 226 $(Echo) Installing compiler runtime library: $1/$$* 227 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 228 $(PROJ_resources_lib)/$1/libclang_rt.%.dylib: \ 229 $(ResourceLibDir)/$1/libclang_rt.%.dylib | $(PROJ_resources_lib)/$1 230 $(Echo) Installing compiler runtime library: $1/$$* 231 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 232 233 # Rule to install runtime libraries. 234 RuntimeLibraryInstall.$1: \ 235 $(RuntimeLibrary.$1.Configs:%=$(PROJ_resources_lib)/$1/libclang_rt.%) 236 .PHONY: RuntimeLibraryInstall.$1 237 endef 238 $(foreach lib,$(RuntimeDirs), $(eval $(call RuntimeLibraryTemplate,$(lib)))) 239 240 $(PROJ_resources_include): 241 $(Verb) $(MKDIR) $@ 242 243 $(PROJ_resources_include)/sanitizer: $(ResourceIncludeDir)/sanitizer $(PROJ_resources_include) 244 $(Verb) $(MKDIR) $@ 245 $(Echo) Installing compiler runtime headers 246 $(Verb) $(DataInstall) $(ResourceIncludeDir)/sanitizer/* \ 247 $(PROJ_resources_include)/sanitizer 248 249 RuntimeHeaderInstall: $(PROJ_resources_include)/sanitizer 250 .PHONY: RuntimeHeaderInstall 251 252 # Hook into the standard Makefile rules. 253 all-local:: $(RuntimeDirs:%=RuntimeLibrary.%) RuntimeHeader 254 install-local:: $(RuntimeDirs:%=RuntimeLibraryInstall.%) RuntimeHeaderInstall 255 clean-local:: CleanRuntimeLibraries 256 257 endif 258 endif 259 endif 260