LLVM：在OSX上優化加載失敗

Question

我試圖運行這個LLVM instrumentation project，但我只能在Linux下加載檢測優化。

我在OSX上編譯並安裝了LLVM 3.2和Clang 3.2，並且在Linux中具有相同的版本。

當我試圖在Linux上運行：

command opt -load ./obj/llvminstrument/libllvminstrument.so -help |grep instrum 
    -insert-edge-profiling      - Insert instrumentation for edge profiling 
    -insert-gcov-profiling      - Insert instrumentation for GCOV profiling 
    -insert-optimal-edge-profiling    - Insert optimal instrumentation for edge profiling 
    -insert-path-profiling      - Insert instrumentation for Ball-Larus path profiling 
    -instrument_block       - Injects block instrumentation instructions 
    -instrument_function      - Injects function instrumentation instructions 
    -instrument_prepare      - Prepares instrumentation instructions 

相同的命令，在OSX：

command opt -load ./obj/llvminstrument/libllvminstrument.dylib -help |grep instrum │········ 
opt: CommandLine Error: Argument 'track-memory' defined more than once!             │········ 
opt: CommandLine Error: Argument 'debug-buffer-size' defined more than once!            │········ 
opt: CommandLine Error: Argument 'print-all-options' defined more than once!            │········ 
opt: CommandLine Error: Argument 'print-options' defined more than once!             │········ 
opt: CommandLine Error: Argument 'print-after-all' defined more than once!            │········ 
opt: CommandLine Error: Argument 'print-before-all' defined more than once!            │········ 
opt: CommandLine Error: Argument 'track-memory' defined more than once!             │········ 
opt: CommandLine Error: Argument 'debug-buffer-size' defined more than once!            │········ 
opt: CommandLine Error: Argument 'print-all-options' defined more than once!            │········ 
opt: CommandLine Error: Argument 'print-options' defined more than once!             │········ 
opt: CommandLine Error: Argument 'print-after-all' defined more than once!            │········ 
opt: CommandLine Error: Argument 'print-before-all' defined more than once!            │········ 
    -insert-edge-profiling      - Insert instrumentation for edge profiling        │········ 
    -insert-gcov-profiling      - Insert instrumentation for GCOV profiling        │········ 
    -insert-optimal-edge-profiling    - Insert optimal instrumentation for edge profiling      │········ 
    -insert-path-profiling      - Insert instrumentation for Ball-Larus path profiling 

Answer 1

我不知道如何解決這個問題，但問題是，你」將幾個核心LLVM庫靜態鏈接到instrumentation dylib中，這種方式與opt驅動程序「不兼容」。因此，當你打開它時，你會得到各種命令行參數的重複全局變量。這可能與LLVM很少有關，而與OS X上使用的特定構建過程有關的更多默認值有不同的符號可見性和/或共享與靜態鏈接的默認值。