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llvm-project/clang/runtime/compiler-rt/Makefile

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##===- clang/runtime/compiler-rt/Makefile ------------------*- Makefile -*-===##
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
##===----------------------------------------------------------------------===##
#
# This file defines support for building the Clang runtime libraries (which are
# implemented by compiler-rt) and placing them in the proper locations in the
# Clang resources directory (i.e., where the driver expects them).
#
##===----------------------------------------------------------------------===##
CLANG_LEVEL := ../..
include $(CLANG_LEVEL)/Makefile
CLANG_VERSION := $(word 3,$(shell grep "CLANG_VERSION " \
$(PROJ_OBJ_DIR)/$(CLANG_LEVEL)/include/clang/Basic/Version.inc))
ResourceDir := $(PROJ_OBJ_ROOT)/$(BuildMode)/lib/clang/$(CLANG_VERSION)
PROJ_resources := $(DESTDIR)$(PROJ_prefix)/lib/clang/$(CLANG_VERSION)
ResourceLibDir := $(ResourceDir)/lib
ResourceIncludeDir := $(ResourceDir)/include
PROJ_resources_lib := $(PROJ_resources)/lib
PROJ_resources_include := $(PROJ_resources)/include
# Expect compiler-rt to be in llvm/projects/compiler-rt
COMPILERRT_SRC_ROOT := $(LLVM_SRC_ROOT)/projects/compiler-rt
# We don't currently support building runtime libraries when we are
# cross-compiling. The issue is that we really want to be set up so that the
# available compiler targets are independent of the current build.
#
# Since we have to build the runtime libraries for the target, it requires we
# have a cross compiler from the build machine to the target. Although in the
# case where for the current build (host == target), we do have such a cross
# compiler, but not defined in a way that is easy for us to reuse. Regardless,
# that also wouldn't help for other possible compiler configurations.
#
# Thus, the simple set up we currently use is to assume that we will be using
# the just built Clang to compile the compiler-rt libraries. As we grow better
# cross compilation support inside Clang and tool support in LLVM, this makes it
# easier for us to achieve the goal of having the compiler targets be easily
# selected at configure time. However, this design does currently preclude the
# building of compiler-rt libraries when the Clang itself is being cross
# compiled.
#
# There are three possible solutions:
# 1. Require building a build-target version of Clang when cross compiling. This
# is simplest, but als greatly increases the build time of cross builds.
#
# 2. Require cross builds have a build-target version of Clang available for
# use. This is a reasonable compromise on #1, as the compiler-rt libraries
# are simple enough that there is not a strong desire to ensure they are
# built with the exact version of Clang being used. Similarly, as Clang
# becomes a better cross compiler it is also increasingly more likely that
# the cross compiler being used will already be a version of Clang.
#
# 3. Come up with an alternate mechanism to define all the toolchain
# information that compiler-rt would need to build libraries for all the
# requested targets. This might be a simple short term solution, but is
# likely to be unwieldy and irritating to maintain in the long term.
ifneq ($(LLVM_CROSS_COMPILING),1)
ifneq ($(CLANG_NO_RUNTIME),1)
ifeq ($(shell test -d $(COMPILERRT_SRC_ROOT) && echo OK),OK)
# Select the compiler-rt configuration to use, and install directory.
#
# FIXME: Eventually, we want some kind of configure support for this. We want to
# build/install runtime libraries for as many targets as clang was configured to
# support.
RuntimeDirs :=
ifeq ($(OS),Darwin)
RuntimeDirs += darwin macho_embedded
RuntimeLibrary.darwin.Configs := \
eprintf.a 10.4.a osx.a cc_kext.a \
asan_osx_dynamic.dylib \
profile_osx.a \
ubsan_osx_dynamic.dylib
IOS_SDK := $(shell xcrun --show-sdk-path -sdk iphoneos 2> /dev/null)
IOSSIM_SDK := $(shell xcrun --show-sdk-path -sdk iphonesimulator 2> /dev/null)
ifneq ($(IOS_SDK)$(IOSSIM_SDK),)
RuntimeLibrary.darwin.Configs += ios.a profile_ios.a
endif
ifneq ($(IOS_SDK),)
ifneq (,$(filter ARM AARCH64,$(TARGETS_TO_BUILD)))
RuntimeLibrary.darwin.Configs += cc_kext_ios.a
endif
endif
ifneq ($(IOSSIM_SDK),)
RuntimeLibrary.darwin.Configs += asan_iossim_dynamic.dylib \
ubsan_iossim_dynamic.dylib
endif
RuntimeLibrary.macho_embedded.Configs := \
hard_static.a hard_pic.a
ifneq (,$(findstring ARM,$(TARGETS_TO_BUILD)))
RuntimeLibrary.macho_embedded.Configs += \
soft_static.a soft_pic.a
endif
endif
# On Linux, include a library which has all the runtime functions.
ifeq ($(OS),Linux)
RuntimeDirs += linux
RuntimeLibrary.linux.Configs :=
# TryCompile compiler source flags
# Returns exit code of running a compiler invocation.
TryCompile = \
$(shell \
cflags=""; \
for flag in $(3); do \
cflags="$$cflags $$flag"; \
done; \
$(1) $$cflags $(2) -o /dev/null > /dev/null 2> /dev/null ; \
echo $$?)
# We try to build 32-bit runtimes both on 32-bit hosts and 64-bit hosts.
Runtime32BitConfigs = \
builtins-i386.a profile-i386.a
# We currently only try to generate runtime libraries on x86.
ifeq ($(ARCH),x86)
RuntimeLibrary.linux.Configs += $(Runtime32BitConfigs)
endif
ifeq ($(ARCH),x86_64)
RuntimeLibrary.linux.Configs += \
builtins-x86_64.a profile-x86_64.a
# We need to build 32-bit libraries on 64-bit platform, and add them
# to the list of runtime libraries to make "clang -m32" work.
# We check that Clang can produce working 32-bit binaries by compiling a simple
# executable.
test_source = $(LLVM_SRC_ROOT)/tools/clang/runtime/compiler-rt/clang_linux_test_input.c
ifeq ($(call TryCompile,$(ToolDir)/clang,$(test_source),-m32),0)
RuntimeLibrary.linux.Configs += $(Runtime32BitConfigs)
endif
endif
endif
####
# The build rules below are designed to be generic and should only need to be
# modified based on changes in the compiler-rt layout or build system.
####
# Rule to build the compiler-rt libraries we need.
#
# We build all the libraries in a single shot to avoid recursive make as much as
# possible.
BuildRuntimeLibraries:
$(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \
ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \
ProjObjRoot=$(PROJ_OBJ_DIR) \
CC="$(ToolDir)/clang" \
VERBOSE=$(VERBOSE) \
$(RuntimeDirs:%=clang_%)
.PHONY: BuildRuntimeLibraries
CleanRuntimeLibraries:
$(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \
ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \
ProjObjRoot=$(PROJ_OBJ_DIR) \
VERBOSE=$(VERBOSE) \
clean
.PHONY: CleanRuntimeLibraries
RuntimeHeader: $(ResourceIncludeDir)/sanitizer
$(PROJ_resources_lib):
$(Verb) $(MKDIR) $@
$(ResourceIncludeDir):
$(Verb) $(MKDIR) $@
$(ResourceIncludeDir)/sanitizer: $(ResourceIncludeDir)
$(Verb) $(MKDIR) $@
$(Verb) cp $(COMPILERRT_SRC_ROOT)/include/sanitizer/*.h $@
# Expand rules for copying/installing each individual library. We can't use
# implicit rules here because we need to match against multiple things.
define RuntimeLibraryTemplate
$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a: BuildRuntimeLibraries
@true
$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so: BuildRuntimeLibraries
@true
$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib: BuildRuntimeLibraries
@true
.PRECIOUS: $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a
# Rule to copy the libraries to their resource directory location.
$(ResourceLibDir)/$1/libclang_rt.%.a: \
$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a \
$(ResourceLibDir)/$1/.dir
$(Echo) Copying runtime library $1/$$* to build dir
$(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.a $$@
$(ResourceLibDir)/$1/libclang_rt.%.so: \
$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so \
$(ResourceLibDir)/$1/.dir
$(Echo) Copying runtime library $1/$$* to build dir
$(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.so $$@
$(ResourceLibDir)/$1/libclang_rt.%.dylib: \
$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib \
$(ResourceLibDir)/$1/.dir
$(Echo) Copying runtime library $1/$$* to build dir
$(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.dylib $$@
RuntimeLibrary.$1: \
$(RuntimeLibrary.$1.Configs:%=$(ResourceLibDir)/$1/libclang_rt.%)
.PHONY: RuntimeLibrary.$1
$(PROJ_resources_lib)/$1: $(PROJ_resources_lib)
$(Verb) $(MKDIR) $$@
$(PROJ_resources_lib)/$1/libclang_rt.%.a: \
$(ResourceLibDir)/$1/libclang_rt.%.a | $(PROJ_resources_lib)/$1
$(Echo) Installing compiler runtime library: $1/$$*
$(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1
$(PROJ_resources_lib)/$1/libclang_rt.%.so: \
$(ResourceLibDir)/$1/libclang_rt.%.so | $(PROJ_resources_lib)/$1
$(Echo) Installing compiler runtime library: $1/$$*
$(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1
$(PROJ_resources_lib)/$1/libclang_rt.%.dylib: \
$(ResourceLibDir)/$1/libclang_rt.%.dylib | $(PROJ_resources_lib)/$1
$(Echo) Installing compiler runtime library: $1/$$*
$(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1
# Rule to install runtime libraries.
RuntimeLibraryInstall.$1: \
$(RuntimeLibrary.$1.Configs:%=$(PROJ_resources_lib)/$1/libclang_rt.%)
.PHONY: RuntimeLibraryInstall.$1
endef
$(foreach lib,$(RuntimeDirs), $(eval $(call RuntimeLibraryTemplate,$(lib))))
$(PROJ_resources_include):
$(Verb) $(MKDIR) $@
$(PROJ_resources_include)/sanitizer: $(ResourceIncludeDir)/sanitizer $(PROJ_resources_include)
$(Verb) $(MKDIR) $@
$(Echo) Installing compiler runtime headers
$(Verb) $(DataInstall) $(ResourceIncludeDir)/sanitizer/* \
$(PROJ_resources_include)/sanitizer
RuntimeHeaderInstall: $(PROJ_resources_include)/sanitizer
.PHONY: RuntimeHeaderInstall
# Hook into the standard Makefile rules.
all-local:: $(RuntimeDirs:%=RuntimeLibrary.%) RuntimeHeader
install-local:: $(RuntimeDirs:%=RuntimeLibraryInstall.%) RuntimeHeaderInstall
clean-local:: CleanRuntimeLibraries
endif
endif
endif
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