Makefile revision 176edba5311f6eff0cad2631449885ddf4fbc9ea 
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
16CLANG_LEVEL := ../..
17include $(CLANG_LEVEL)/Makefile
18
19CLANG_VERSION := $(word 3,$(shell grep "CLANG_VERSION " \
20	$(PROJ_OBJ_DIR)/$(CLANG_LEVEL)/include/clang/Basic/Version.inc))
21
22ResourceDir := $(PROJ_OBJ_ROOT)/$(BuildMode)/lib/clang/$(CLANG_VERSION)
23PROJ_resources := $(DESTDIR)$(PROJ_prefix)/lib/clang/$(CLANG_VERSION)
24
25ResourceLibDir := $(ResourceDir)/lib
26ResourceIncludeDir := $(ResourceDir)/include
27PROJ_resources_lib := $(PROJ_resources)/lib
28PROJ_resources_include := $(PROJ_resources)/include
29
30# Expect compiler-rt to be in llvm/projects/compiler-rt
31COMPILERRT_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.
66ifneq ($(LLVM_CROSS_COMPILING),1)
67ifneq ($(CLANG_NO_RUNTIME),1)
68ifeq ($(shell test -d $(COMPILERRT_SRC_ROOT) && echo OK),OK)
69
70# Select the compiler-rt configuration to use, and install directory.
71#
72# FIXME: Eventually, we want some kind of configure support for this. We want to
73# build/install runtime libraries for as many targets as clang was configured to
74# support.
75RuntimeDirs :=
76ifeq ($(OS),Darwin)
77RuntimeDirs += darwin macho_embedded
78RuntimeLibrary.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.a
83
84IOS_SDK := $(shell xcrun --show-sdk-path -sdk iphoneos 2> /dev/null)
85IOSSIM_SDK := $(shell xcrun --show-sdk-path -sdk iphonesimulator 2> /dev/null)
86
87ifneq ($(IOS_SDK)$(IOSSIM_SDK),)
88RuntimeLibrary.darwin.Configs += ios.a profile_ios.a
89endif
90
91ifneq ($(IOS_SDK),)
92RuntimeLibrary.darwin.Configs += cc_kext_ios5.a
93endif
94
95ifneq ($(IOSSIM_SDK),)
96RuntimeLibrary.darwin.Configs += asan_iossim_dynamic.dylib
97endif
98
99RuntimeLibrary.macho_embedded.Configs := \
100	hard_static.a hard_pic.a
101ifneq (,$(findstring ARM,$(TARGETS_TO_BUILD)))
102RuntimeLibrary.macho_embedded.Configs += \
103	soft_static.a soft_pic.a
104endif
105endif
106
107# On Linux, include a library which has all the runtime functions.
108ifeq ($(OS),Linux)
109RuntimeDirs += linux
110RuntimeLibrary.linux.Configs :=
111
112# TryCompile compiler source flags
113# Returns exit code of running a compiler invocation.
114TryCompile = \
115  $(shell \
116    cflags=""; \
117    for flag in $(3); do \
118      cflags="$$cflags $$flag"; \
119    done; \
120    $(1) $$cflags $(2) -o /dev/null > /dev/null 2> /dev/null ; \
121    echo $$?)
122
123# We try to build 32-bit runtimes both on 32-bit hosts and 64-bit hosts.
124Runtime32BitConfigs = \
125	builtins-i386.a profile-i386.a san-i386.a asan-i386.a asan_cxx-i386.a \
126	ubsan-i386.a ubsan_cxx-i386.a
127
128# We currently only try to generate runtime libraries on x86.
129ifeq ($(ARCH),x86)
130RuntimeLibrary.linux.Configs += $(Runtime32BitConfigs)
131endif
132
133ifeq ($(ARCH),x86_64)
134RuntimeLibrary.linux.Configs += \
135	builtins-x86_64.a profile-x86_64.a san-x86_64.a asan-x86_64.a \
136	asan_cxx-x86_64.a tsan-x86_64.a msan-x86_64.a ubsan-x86_64.a \
137	ubsan_cxx-x86_64.a dfsan-x86_64.a lsan-x86_64.a
138# We need to build 32-bit ASan/UBsan libraries on 64-bit platform, and add them
139# to the list of runtime libraries to make
140# "clang -fsanitize=(address|undefined) -m32" work.
141# We check that Clang can produce working 32-bit binaries by compiling a simple
142# executable.
143test_source = $(LLVM_SRC_ROOT)/tools/clang/runtime/compiler-rt/clang_linux_test_input.c
144ifeq ($(call TryCompile,$(ToolDir)/clang,$(test_source),-m32),0)
145RuntimeLibrary.linux.Configs += $(Runtime32BitConfigs)
146endif
147ifneq ($(LLVM_ANDROID_TOOLCHAIN_DIR),)
148RuntimeLibrary.linux.Configs += asan-arm-android.so
149endif
150endif
151
152endif
153
154####
155# The build rules below are designed to be generic and should only need to be
156# modified based on changes in the compiler-rt layout or build system.
157####
158
159# Rule to build the compiler-rt libraries we need.
160#
161# We build all the libraries in a single shot to avoid recursive make as much as
162# possible.
163BuildRuntimeLibraries:
164	$(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \
165	  ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \
166	  ProjObjRoot=$(PROJ_OBJ_DIR) \
167	  CC="$(ToolDir)/clang" \
168	  VERBOSE=$(VERBOSE) \
169	  LLVM_ANDROID_TOOLCHAIN_DIR="$(LLVM_ANDROID_TOOLCHAIN_DIR)" \
170	  $(RuntimeDirs:%=clang_%)
171.PHONY: BuildRuntimeLibraries
172CleanRuntimeLibraries:
173	$(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \
174	  ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \
175	  ProjObjRoot=$(PROJ_OBJ_DIR) \
176	  VERBOSE=$(VERBOSE) \
177	  clean
178.PHONY: CleanRuntimeLibraries
179RuntimeHeader: $(ResourceIncludeDir)/sanitizer
180
181$(PROJ_resources_lib):
182	$(Verb) $(MKDIR) $@
183
184$(ResourceIncludeDir):
185	$(Verb) $(MKDIR) $@
186
187$(ResourceIncludeDir)/sanitizer: $(ResourceIncludeDir)
188	$(Verb) $(MKDIR) $@
189	$(Verb) cp $(COMPILERRT_SRC_ROOT)/include/sanitizer/*.h $@
190
191# Expand rules for copying/installing each individual library. We can't use
192# implicit rules here because we need to match against multiple things.
193define RuntimeLibraryTemplate
194$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a: BuildRuntimeLibraries
195	@true
196$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so: BuildRuntimeLibraries
197	@true
198$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib: BuildRuntimeLibraries
199	@true
200.PRECIOUS: $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a
201
202# Rule to copy the libraries to their resource directory location.
203$(ResourceLibDir)/$1/libclang_rt.%.a: \
204		$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a \
205		$(ResourceLibDir)/$1/.dir
206	$(Echo) Copying runtime library $1/$$* to build dir
207	$(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.a $$@
208$(ResourceLibDir)/$1/libclang_rt.%.so: \
209		$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.so \
210		$(ResourceLibDir)/$1/.dir
211	$(Echo) Copying runtime library $1/$$* to build dir
212	$(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.so $$@
213$(ResourceLibDir)/$1/libclang_rt.%.dylib: \
214		$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.dylib \
215		$(ResourceLibDir)/$1/.dir
216	$(Echo) Copying runtime library $1/$$* to build dir
217	$(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.dylib $$@
218RuntimeLibrary.$1: \
219		$(RuntimeLibrary.$1.Configs:%=$(ResourceLibDir)/$1/libclang_rt.%)
220.PHONY: RuntimeLibrary.$1
221
222$(PROJ_resources_lib)/$1: $(PROJ_resources_lib)
223	$(Verb) $(MKDIR) $$@
224
225$(PROJ_resources_lib)/$1/libclang_rt.%.a: \
226		$(ResourceLibDir)/$1/libclang_rt.%.a | $(PROJ_resources_lib)/$1
227	$(Echo) Installing compiler runtime library: $1/$$*
228	$(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1
229$(PROJ_resources_lib)/$1/libclang_rt.%.so: \
230		$(ResourceLibDir)/$1/libclang_rt.%.so | $(PROJ_resources_lib)/$1
231	$(Echo) Installing compiler runtime library: $1/$$*
232	$(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1
233$(PROJ_resources_lib)/$1/libclang_rt.%.dylib: \
234		$(ResourceLibDir)/$1/libclang_rt.%.dylib | $(PROJ_resources_lib)/$1
235	$(Echo) Installing compiler runtime library: $1/$$*
236	$(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1
237
238# Rule to install runtime libraries.
239RuntimeLibraryInstall.$1: \
240		$(RuntimeLibrary.$1.Configs:%=$(PROJ_resources_lib)/$1/libclang_rt.%)
241.PHONY: RuntimeLibraryInstall.$1
242endef
243$(foreach lib,$(RuntimeDirs), $(eval $(call RuntimeLibraryTemplate,$(lib))))
244
245$(PROJ_resources_include):
246	$(Verb) $(MKDIR) $@
247
248$(PROJ_resources_include)/sanitizer: $(ResourceIncludeDir)/sanitizer $(PROJ_resources_include)
249	$(Verb) $(MKDIR) $@
250	$(Echo) Installing compiler runtime headers
251	$(Verb) $(DataInstall) $(ResourceIncludeDir)/sanitizer/* \
252                               $(PROJ_resources_include)/sanitizer
253
254RuntimeHeaderInstall: $(PROJ_resources_include)/sanitizer
255.PHONY: RuntimeHeaderInstall
256
257# Hook into the standard Makefile rules.
258all-local:: $(RuntimeDirs:%=RuntimeLibrary.%) RuntimeHeader
259install-local:: $(RuntimeDirs:%=RuntimeLibraryInstall.%) RuntimeHeaderInstall
260clean-local:: CleanRuntimeLibraries
261
262endif
263endif
264endif
265