build/Darwin: Add an LLVM_LTO_VERSION_OFFSET make variable to allow offsetting
[oota-llvm.git] / tools / lto / Makefile
1 ##===- tools/lto/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 LEVEL = ../..
11 LIBRARYNAME = LTO
12
13 EXPORTED_SYMBOL_FILE = $(PROJ_SRC_DIR)/lto.exports
14
15 # Include this here so we can get the configuration of the targets
16 # that have been configured for construction. We have to do this 
17 # early so we can set up LINK_COMPONENTS before including Makefile.rules
18 include $(LEVEL)/Makefile.config
19
20 LINK_LIBS_IN_SHARED = 1
21 SHARED_LIBRARY = 1
22
23 LINK_COMPONENTS := $(TARGETS_TO_BUILD) ipo scalaropts linker bitreader bitwriter
24
25 include $(LEVEL)/Makefile.common
26
27 ifeq ($(HOST_OS),Darwin)
28     # Special hack to allow libLTO to have an offset version number.
29     ifdef LLVM_LTO_VERSION_OFFSET
30         LTO_LIBRARY_VERSION := $(shell expr $(LLVM_SUBMIT_VERSION) + \
31                                             $(LLVM_LTO_VERSION_OFFSET))
32     else
33         LTO_LIBRARY_VERSION := $(LLVM_SUBMIT_VERSION)
34     endif
35
36     # set dylib internal version number to llvmCore submission number
37     ifdef LLVM_SUBMIT_VERSION
38         LLVMLibsOptions := $(LLVMLibsOptions) -Wl,-current_version \
39                         -Wl,$(LTO_LIBRARY_VERSION).$(LLVM_SUBMIT_SUBVERSION) \
40                         -Wl,-compatibility_version -Wl,1
41     endif
42     # extra options to override libtool defaults 
43     LLVMLibsOptions    := $(LLVMLibsOptions)  \
44                          -avoid-version \
45                          -Wl,-dead_strip \
46                          -Wl,-seg1addr -Wl,0xE0000000 
47
48     # Mac OS X 10.4 and earlier tools do not allow a second -install_name on command line
49     DARWIN_VERS := $(shell echo $(TARGET_TRIPLE) | sed 's/.*darwin\([0-9]*\).*/\1/')
50     ifneq ($(DARWIN_VERS),8)
51        LLVMLibsOptions    := $(LLVMLibsOptions)  \
52                             -no-undefined -Wl,-install_name \
53                             -Wl,"@executable_path/../lib/lib$(LIBRARYNAME)$(SHLIBEXT)"
54     endif
55 endif