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_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 try to build 32-bit runtimes both on 32-bit hosts and 64-bit hosts. 100 Runtime32BitConfigs = \ 101 full-i386.a profile-i386.a san-i386.a asan-i386.a ubsan-i386.a \ 102 ubsan_cxx-i386.a 103 104 # We currently only try to generate runtime libraries on x86. 105 ifeq ($(ARCH),x86) 106 RuntimeLibrary.linux.Configs += $(Runtime32BitConfigs) 107 endif 108 109 ifeq ($(ARCH),x86_64) 110 RuntimeLibrary.linux.Configs += \ 111 full-x86_64.a profile-x86_64.a san-x86_64.a asan-x86_64.a \ 112 tsan-x86_64.a msan-x86_64.a ubsan-x86_64.a ubsan_cxx-x86_64.a 113 # We need to build 32-bit ASan/UBsan libraries on 64-bit platform, and add them 114 # to the list of runtime libraries to make 115 # "clang -fsanitize=(address|undefined) -m32" work. 116 # We check that Clang can produce working 32-bit binaries by compiling a simple 117 # executable. 118 test_source = $(LLVM_SRC_ROOT)/tools/clang/runtime/compiler-rt/clang_linux_test_input.c 119 ifeq ($(call TryCompile,$(ToolDir)/clang,$(test_source),-m32),0) 120 RuntimeLibrary.linux.Configs += $(Runtime32BitConfigs) 121 endif 122 ifneq ($(LLVM_ANDROID_TOOLCHAIN_DIR),) 123 RuntimeLibrary.linux.Configs += asan-arm-android.so 124 endif 125 endif 126 127 endif 128 129 #### 130 # The build rules below are designed to be generic and should only need to be 131 # modified based on changes in the compiler-rt layout or build system. 132 #### 133 134 # Rule to build the compiler-rt libraries we need. 135 # 136 # We build all the libraries in a single shot to avoid recursive make as much as 137 # possible. 138 BuildRuntimeLibraries: 139 $(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \ 140 ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \ 141 ProjObjRoot=$(PROJ_OBJ_DIR) \ 142 CC="$(ToolDir)/clang" \ 143 LLVM_ANDROID_TOOLCHAIN_DIR="$(LLVM_ANDROID_TOOLCHAIN_DIR)" \ 144 $(RuntimeDirs:%=clang_%) 145 .PHONY: BuildRuntimeLibraries 146 CleanRuntimeLibraries: 147 $(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \ 148 ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \ 149 ProjObjRoot=$(PROJ_OBJ_DIR) \ 150 clean 151 .PHONY: CleanRuntimeLibraries 152 153 $(PROJ_resources_lib): 154 $(Verb) $(MKDIR) $@ 155 156 # Expand rules for copying/installing each individual library. We can't use 157 # implicit rules here because we need to match against multiple things. 158 define RuntimeLibraryTemplate 159 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a: BuildRuntimeLibraries 160 @true 161 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so: BuildRuntimeLibraries 162 @true 163 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib: BuildRuntimeLibraries 164 @true 165 .PRECIOUS: $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a 166 167 # Rule to copy the libraries to their resource directory location. 168 $(ResourceLibDir)/$1/libclang_rt.%.a: \ 169 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a \ 170 $(ResourceLibDir)/$1/.dir 171 $(Echo) Copying runtime library $1/$$* to build dir 172 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.a $$@ 173 $(ResourceLibDir)/$1/libclang_rt.%.so: \ 174 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so \ 175 $(ResourceLibDir)/$1/.dir 176 $(Echo) Copying runtime library $1/$$* to build dir 177 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.so $$@ 178 $(ResourceLibDir)/$1/libclang_rt.%.dylib: \ 179 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib \ 180 $(ResourceLibDir)/$1/.dir 181 $(Echo) Copying runtime library $1/$$* to build dir 182 $(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.dylib $$@ 183 $(Echo) Fixing LC_ID_DYLIB of $$@ 184 $(Verb) install_name_tool $$@ -id $$@ 185 RuntimeLibrary.$1: \ 186 $(RuntimeLibrary.$1.Configs:%=$(ResourceLibDir)/$1/libclang_rt.%) 187 .PHONY: RuntimeLibrary.$1 188 189 $(PROJ_resources_lib)/$1: $(PROJ_resources_lib) 190 $(Verb) $(MKDIR) $$@ 191 192 $(PROJ_resources_lib)/$1/libclang_rt.%.a: \ 193 $(ResourceLibDir)/$1/libclang_rt.%.a | $(PROJ_resources_lib)/$1 194 $(Echo) Installing compiler runtime library: $1/$$* 195 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 196 $(PROJ_resources_lib)/$1/libclang_rt.%.so: \ 197 $(ResourceLibDir)/$1/libclang_rt.%.so | $(PROJ_resources_lib)/$1 198 $(Echo) Installing compiler runtime library: $1/$$* 199 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 200 $(PROJ_resources_lib)/$1/libclang_rt.%.dylib: \ 201 $(ResourceLibDir)/$1/libclang_rt.%.dylib | $(PROJ_resources_lib)/$1 202 $(Echo) Installing compiler runtime library: $1/$$* 203 $(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1 204 205 # Rule to install runtime libraries. 206 RuntimeLibraryInstall.$1: \ 207 $(RuntimeLibrary.$1.Configs:%=$(PROJ_resources_lib)/$1/libclang_rt.%) 208 .PHONY: RuntimeLibraryInstall.$1 209 endef 210 $(foreach lib,$(RuntimeDirs), $(eval $(call RuntimeLibraryTemplate,$(lib)))) 211 212 # Hook into the standard Makefile rules. 213 all-local:: $(RuntimeDirs:%=RuntimeLibrary.%) 214 install-local:: $(RuntimeDirs:%=RuntimeLibraryInstall.%) 215 clean-local:: CleanRuntimeLibraries 216 217 endif 218 endif 219 endif 220
