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-rw-r--r--tools/lto/Makefile10
1 files changed, 9 insertions, 1 deletions
diff --git a/tools/lto/Makefile b/tools/lto/Makefile
index 8d57333f9c..f3fb79e682 100644
--- a/tools/lto/Makefile
+++ b/tools/lto/Makefile
@@ -25,10 +25,18 @@ LINK_COMPONENTS := $(TARGETS_TO_BUILD) ipo scalaropts linker bitreader bitwriter
include $(LEVEL)/Makefile.common
ifeq ($(HOST_OS),Darwin)
+ # Special hack to allow libLTO to have an offset version number.
+ ifdef LLVM_LTO_VERSION_OFFSET
+ LTO_LIBRARY_VERSION := $(shell expr $(LLVM_SUBMIT_VERSION) + \
+ $(LLVM_LTO_VERSION_OFFSET))
+ else
+ LTO_LIBRARY_VERSION := $(LLVM_SUBMIT_VERSION)
+ endif
+
# set dylib internal version number to llvmCore submission number
ifdef LLVM_SUBMIT_VERSION
LLVMLibsOptions := $(LLVMLibsOptions) -Wl,-current_version \
- -Wl,$(LLVM_SUBMIT_VERSION).$(LLVM_SUBMIT_SUBVERSION) \
+ -Wl,$(LTO_LIBRARY_VERSION).$(LLVM_SUBMIT_SUBVERSION) \
-Wl,-compatibility_version -Wl,1
endif
# extra options to override libtool defaults