Home | History | Annotate | Download | only in compiler-rt 
      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 RuntimeLibrary.darwin.Configs += cc_kext_ios5.a
     93 endif
     94 
     95 ifneq ($(IOSSIM_SDK),)
     96 RuntimeLibrary.darwin.Configs += asan_iossim_dynamic.dylib \
     97                                  ubsan_iossim_dynamic.dylib
     98 endif
     99 
    100 RuntimeLibrary.macho_embedded.Configs := \
    101 	hard_static.a hard_pic.a
    102 ifneq (,$(findstring ARM,$(TARGETS_TO_BUILD)))
    103 RuntimeLibrary.macho_embedded.Configs += \
    104 	soft_static.a soft_pic.a
    105 endif
    106 endif
    107 
    108 # On Linux, include a library which has all the runtime functions.
    109 ifeq ($(OS),Linux)
    110 RuntimeDirs += linux
    111 RuntimeLibrary.linux.Configs :=
    112 
    113 # TryCompile compiler source flags
    114 # Returns exit code of running a compiler invocation.
    115 TryCompile = \
    116   $(shell \
    117     cflags=""; \
    118     for flag in $(3); do \
    119       cflags="$$cflags $$flag"; \
    120     done; \
    121     $(1) $$cflags $(2) -o /dev/null > /dev/null 2> /dev/null ; \
    122     echo $$?)
    123 
    124 # We try to build 32-bit runtimes both on 32-bit hosts and 64-bit hosts.
    125 Runtime32BitConfigs = \
    126 	builtins-i386.a profile-i386.a
    127 
    128 # We currently only try to generate runtime libraries on x86.
    129 ifeq ($(ARCH),x86)
    130 RuntimeLibrary.linux.Configs += $(Runtime32BitConfigs)
    131 endif
    132 
    133 ifeq ($(ARCH),x86_64)
    134 RuntimeLibrary.linux.Configs += \
    135 	builtins-x86_64.a profile-x86_64.a
    136 # We need to build 32-bit libraries on 64-bit platform, and add them
    137 # to the list of runtime libraries to make "clang -m32" work.
    138 # We check that Clang can produce working 32-bit binaries by compiling a simple
    139 # executable.
    140 test_source = $(LLVM_SRC_ROOT)/tools/clang/runtime/compiler-rt/clang_linux_test_input.c
    141 ifeq ($(call TryCompile,$(ToolDir)/clang,$(test_source),-m32),0)
    142 RuntimeLibrary.linux.Configs += $(Runtime32BitConfigs)
    143 endif
    144 endif
    145 
    146 endif
    147 
    148 ####
    149 # The build rules below are designed to be generic and should only need to be
    150 # modified based on changes in the compiler-rt layout or build system.
    151 ####
    152 
    153 # Rule to build the compiler-rt libraries we need.
    154 #
    155 # We build all the libraries in a single shot to avoid recursive make as much as
    156 # possible.
    157 BuildRuntimeLibraries:
    158 	$(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \
    159 	  ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \
    160 	  ProjObjRoot=$(PROJ_OBJ_DIR) \
    161 	  CC="$(ToolDir)/clang" \
    162 	  VERBOSE=$(VERBOSE) \
    163 	  $(RuntimeDirs:%=clang_%)
    164 .PHONY: BuildRuntimeLibraries
    165 CleanRuntimeLibraries:
    166 	$(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \
    167 	  ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \
    168 	  ProjObjRoot=$(PROJ_OBJ_DIR) \
    169 	  VERBOSE=$(VERBOSE) \
    170 	  clean
    171 .PHONY: CleanRuntimeLibraries
    172 RuntimeHeader: $(ResourceIncludeDir)/sanitizer
    173 
    174 $(PROJ_resources_lib):
    175 	$(Verb) $(MKDIR) $@
    176 
    177 $(ResourceIncludeDir):
    178 	$(Verb) $(MKDIR) $@
    179 
    180 $(ResourceIncludeDir)/sanitizer: $(ResourceIncludeDir)
    181 	$(Verb) $(MKDIR) $@
    182 	$(Verb) cp $(COMPILERRT_SRC_ROOT)/include/sanitizer/*.h $@
    183 
    184 # Expand rules for copying/installing each individual library. We can't use
    185 # implicit rules here because we need to match against multiple things.
    186 define RuntimeLibraryTemplate
    187 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a: BuildRuntimeLibraries
    188 	@true
    189 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so: BuildRuntimeLibraries
    190 	@true
    191 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib: BuildRuntimeLibraries
    192 	@true
    193 .PRECIOUS: $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a
    194 
    195 # Rule to copy the libraries to their resource directory location.
    196 $(ResourceLibDir)/$1/libclang_rt.%.a: \
    197 		$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a \
    198 		$(ResourceLibDir)/$1/.dir
    199 	$(Echo) Copying runtime library $1/$$* to build dir
    200 	$(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.a $$@
    201 $(ResourceLibDir)/$1/libclang_rt.%.so: \
    202 		$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so \
    203 		$(ResourceLibDir)/$1/.dir
    204 	$(Echo) Copying runtime library $1/$$* to build dir
    205 	$(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.so $$@
    206 $(ResourceLibDir)/$1/libclang_rt.%.dylib: \
    207 		$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib \
    208 		$(ResourceLibDir)/$1/.dir
    209 	$(Echo) Copying runtime library $1/$$* to build dir
    210 	$(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.dylib $$@
    211 RuntimeLibrary.$1: \
    212 		$(RuntimeLibrary.$1.Configs:%=$(ResourceLibDir)/$1/libclang_rt.%)
    213 .PHONY: RuntimeLibrary.$1
    214 
    215 $(PROJ_resources_lib)/$1: $(PROJ_resources_lib)
    216 	$(Verb) $(MKDIR) $$@
    217 
    218 $(PROJ_resources_lib)/$1/libclang_rt.%.a: \
    219 		$(ResourceLibDir)/$1/libclang_rt.%.a | $(PROJ_resources_lib)/$1
    220 	$(Echo) Installing compiler runtime library: $1/$$*
    221 	$(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1
    222 $(PROJ_resources_lib)/$1/libclang_rt.%.so: \
    223 		$(ResourceLibDir)/$1/libclang_rt.%.so | $(PROJ_resources_lib)/$1
    224 	$(Echo) Installing compiler runtime library: $1/$$*
    225 	$(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1
    226 $(PROJ_resources_lib)/$1/libclang_rt.%.dylib: \
    227 		$(ResourceLibDir)/$1/libclang_rt.%.dylib | $(PROJ_resources_lib)/$1
    228 	$(Echo) Installing compiler runtime library: $1/$$*
    229 	$(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1
    230 
    231 # Rule to install runtime libraries.
    232 RuntimeLibraryInstall.$1: \
    233 		$(RuntimeLibrary.$1.Configs:%=$(PROJ_resources_lib)/$1/libclang_rt.%)
    234 .PHONY: RuntimeLibraryInstall.$1
    235 endef
    236 $(foreach lib,$(RuntimeDirs), $(eval $(call RuntimeLibraryTemplate,$(lib))))
    237 
    238 $(PROJ_resources_include):
    239 	$(Verb) $(MKDIR) $@
    240 
    241 $(PROJ_resources_include)/sanitizer: $(ResourceIncludeDir)/sanitizer $(PROJ_resources_include)
    242 	$(Verb) $(MKDIR) $@
    243 	$(Echo) Installing compiler runtime headers
    244 	$(Verb) $(DataInstall) $(ResourceIncludeDir)/sanitizer/* \
    245                                $(PROJ_resources_include)/sanitizer
    246 
    247 RuntimeHeaderInstall: $(PROJ_resources_include)/sanitizer
    248 .PHONY: RuntimeHeaderInstall
    249 
    250 # Hook into the standard Makefile rules.
    251 all-local:: $(RuntimeDirs:%=RuntimeLibrary.%) RuntimeHeader
    252 install-local:: $(RuntimeDirs:%=RuntimeLibraryInstall.%) RuntimeHeaderInstall
    253 clean-local:: CleanRuntimeLibraries
    254 
    255 endif
    256 endif
    257 endif
    258