diff options
author | Zancanaro; Carlo <czan8762@plang3.cs.usyd.edu.au> | 2012-09-24 09:58:17 +1000 |
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committer | Zancanaro; Carlo <czan8762@plang3.cs.usyd.edu.au> | 2012-09-24 09:58:17 +1000 |
commit | 222e2a7620e6520ffaf4fc4e69d79c18da31542e (patch) | |
tree | 7bfbc05bfa3b41c8f9d2e56d53a0bc3e310df239 /clang/runtime/compiler-rt | |
parent | 3d206f03985b50beacae843d880bccdc91a9f424 (diff) |
Add the clang library to the repo (with some of my changes, too).
Diffstat (limited to 'clang/runtime/compiler-rt')
-rw-r--r-- | clang/runtime/compiler-rt/Makefile | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/clang/runtime/compiler-rt/Makefile b/clang/runtime/compiler-rt/Makefile new file mode 100644 index 0000000..534168b --- /dev/null +++ b/clang/runtime/compiler-rt/Makefile @@ -0,0 +1,163 @@ +##===- 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 +PROJ_resources_lib := $(PROJ_resources)/lib + +# 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 unwieldly 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 +RuntimeLibrary.darwin.Configs := \ + eprintf 10.4 osx ios cc_kext \ + asan_osx profile_osx profile_ios +endif + +# On Linux, include a library which has all the runtime functions. +ifeq ($(OS),Linux) +RuntimeDirs += linux +RuntimeLibrary.linux.Configs := + +# We currently only try to generate runtime libraries on x86. +ifeq ($(ARCH),x86) +RuntimeLibrary.linux.Configs += \ + full-i386 profile-i386 asan-i386 +endif +ifeq ($(ARCH),x86_64) +RuntimeLibrary.linux.Configs += \ + full-x86_64 profile-x86_64 asan-x86_64 +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" \ + $(RuntimeDirs:%=clang_%) +.PHONY: BuildRuntimeLibraries +CleanRuntimeLibraries: + $(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \ + ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \ + ProjObjRoot=$(PROJ_OBJ_DIR) \ + clean +.PHONY: CleanRuntimeLibraries + +$(PROJ_resources_lib): + $(Verb) $(MKDIR) $@ + +# Expand rules for copying/installing each individual library. We can't use +# implicit rules here because we need to match against multiple things. +define RuntimeLibraryTemplate +$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a: BuildRuntimeLibraries + @true +.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 $$@ +RuntimeLibrary.$1: \ + $(RuntimeLibrary.$1.Configs:%=$(ResourceLibDir)/$1/libclang_rt.%.a) +.PHONY: RuntimeLibrary.$1 + +$(PROJ_resources_lib)/$1: $(PROJ_resources_lib) + $(Verb) $(MKDIR) $$@ + +$(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 + +# Rule to install runtime libraries. +RuntimeLibraryInstall.$1: \ + $(RuntimeLibrary.$1.Configs:%=$(PROJ_resources_lib)/$1/libclang_rt.%.a) +.PHONY: RuntimeLibraryInstall.$1 +endef +$(foreach lib,$(RuntimeDirs), $(eval $(call RuntimeLibraryTemplate,$(lib)))) + +# Hook into the standard Makefile rules. +all-local:: $(RuntimeDirs:%=RuntimeLibrary.%) +install-local:: $(RuntimeDirs:%=RuntimeLibraryInstall.%) +clean-local:: CleanRuntimeLibraries + +endif +endif +endif |