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      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 := $(LLVM_SRC_ROOT)/projects/compiler-rt
     30 
     31 # Additional flags to pass to Clang.
     32 CLANG_CCFLAGS := -no-integrated-as
     33 
     34 ifneq ($(CLANG_NO_RUNTIME),1)
     35 ifeq ($(shell test -d $(COMPILERRT_SRC_ROOT) && echo OK),OK)
     36 
     37 # Select the compiler-rt configuration to use, and install directory.
     38 #
     39 # FIXME: Eventually, we want some kind of configure support for this. We want to
     40 # build/install runtime libraries for as many targets as clang was configured to
     41 # support.
     42 RuntimeDirs :=
     43 ifeq ($(OS),Darwin)
     44 RuntimeDirs += darwin
     45 RuntimeLibrary.darwin.Configs = eprintf 10.4 osx ios cc_kext
     46 
     47 # On Darwin, fake Clang into using the iOS assembler (since compiler-rt wants to
     48 # build ARM bits).
     49 ifeq ($(OS),Darwin)
     50 CLANG_CCFLAGS += -ccc-install-dir \
     51 	/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/
     52 endif
     53 endif
     54 
     55 # Rule to build the compiler-rt libraries we need.
     56 #
     57 # We build all the libraries in a single shot to avoid recursive make as much as
     58 # possible.
     59 BuildRuntimeLibraries:
     60 	$(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \
     61 	  ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \
     62 	  ProjObjRoot=$(PROJ_OBJ_DIR) \
     63 	  CC="$(ToolDir)/clang $(CLANG_CCFLAGS)" \
     64 	  $(RuntimeDirs:%=clang_%)
     65 .PHONY: BuildRuntimeLibraries
     66 CleanRuntimeLibraries:
     67 	$(Verb) $(MAKE) -C $(COMPILERRT_SRC_ROOT) \
     68 	  ProjSrcRoot=$(COMPILERRT_SRC_ROOT) \
     69 	  ProjObjRoot=$(PROJ_OBJ_DIR) \
     70 	  clean
     71 .PHONY: CleanRuntimeLibraries
     72 
     73 $(PROJ_resources_lib):
     74 	$(Verb) $(MKDIR) $@
     75 
     76 # Expand rules for copying/installing each individual library. We can't use
     77 # implicit rules here because we need to match against multiple things.
     78 define RuntimeLibraryTemplate
     79 $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a: BuildRuntimeLibraries
     80 	@true
     81 .PRECIOUS: $(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a
     82 
     83 # Rule to copy the libraries to their resource directory location.
     84 $(ResourceLibDir)/$1/libclang_rt.%.a: \
     85 		$(PROJ_OBJ_DIR)/clang_$1/%/libcompiler_rt.a \
     86 		$(ResourceLibDir)/$1/.dir
     87 	$(Echo) Copying runtime library $1/$$* to build dir
     88 	$(Verb) cp $(PROJ_OBJ_DIR)/clang_$1/$$*/libcompiler_rt.a $$@
     89 RuntimeLibrary.$1: \
     90 		$(RuntimeLibrary.$1.Configs:%=$(ResourceLibDir)/$1/libclang_rt.%.a)
     91 .PHONY: RuntimeLibrary.$1
     92 
     93 $(PROJ_resources_lib)/$1: $(PROJ_resources_lib)
     94 	$(Verb) $(MKDIR) $$@
     95 
     96 $(PROJ_resources_lib)/$1/libclang_rt.%.a: \
     97 		$(ResourceLibDir)/$1/libclang_rt.%.a | $(PROJ_resources_lib)/$1
     98 	$(Echo) Installing compiler runtime library: $1/$$*
     99 	$(Verb) $(DataInstall) $$< $(PROJ_resources_lib)/$1
    100 
    101 # Rule to install runtime libraries.
    102 RuntimeLibraryInstall.$1: \
    103 		$(RuntimeLibrary.$1.Configs:%=$(PROJ_resources_lib)/$1/libclang_rt.%.a)
    104 .PHONY: RuntimeLibraryInstall.$1
    105 endef
    106 $(foreach lib,$(RuntimeDirs), $(eval $(call RuntimeLibraryTemplate,$(lib))))
    107 
    108 # Hook into the standard Makefile rules.
    109 all-local:: $(RuntimeDirs:%=RuntimeLibrary.%)
    110 install-local:: $(RuntimeDirs:%=RuntimeLibraryInstall.%)
    111 clean-local:: CleanRuntimeLibraries
    112 
    113 endif
    114 endif
    115