How to solve ‘undefined reference to llvm::createLowerSwitchPass()’ when compiling Obfuscator(llvm-9.0) ?
How to solve the problem that an error occurs in Obfuscator(llvm-9.0) compilation, as follow figure:
As error information showing, ‘undefined reference to llvm::createLowerSwitchPass()’. Cause of the problem is lack of llvm link-components configured.
The way to solve the problem is:
1.modify ‘obfuscator/tools/lto/CMakeLists.txt’:
1 set(LLVM_LINK_COMPONENTS
2 +++ Obfuscation # --[FIX err]
3 +++ TransformUtils # --[FIX err]
4 AllTargetsAsmParsers
5 AllTargetsCodeGens
2.modify ‘obfuscator/tools/llvm-lto/CMakeLists.txt’
1 set(LLVM_LINK_COMPONENTS
2 +++ Obfuscation # --[FIX err]
3 +++ TransformUtils # --[FIX err]
4 AllTargetsAsmParsers
5 AllTargetsCodeGens
3.modify ‘obfuscator/tools/llvm-lto2/CMakeLists.txt’
1 set(LLVM_LINK_COMPONENTS
2 +++ Obfuscation # --[FIX err]
3 +++ TransformUtils # --[FIX err]
4 AllTargetsAsmParsers
5 AllTargetsCodeGens
4.modify ‘obfuscator/unittests/IR/CMakeLists.txt’
1 set(LLVM_LINK_COMPONENTS
2 +++ Obfuscation # --[FIX err]
3 +++ TransformUtils # --[FIX err]
4 Analysis
5 AsmParser
5.modify ‘obfuscator/unittests/Passes/CMakeLists.txt’
10 set(LLVM_LINK_COMPONENTS
11 +++ Obfuscation # --[FIX err]
12 +++ TransformUtils # --[FIX err]
13 Support
14 Passes
15 Core)
6.Finally, create obfuscator cmake project, and make.
Note:
The way above is too complex. I think that there is a better way to solve this problem, maybe modifying other cmake-config to compile the function definition(llvm::createLowerSwitchPass) into other archive, or others. At the moment, I have not idea.
If your way is better than mine, please tell me. Thanks.
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