xcode编译链接的时候遇到下面这个问题。
![](https://img.haomeiwen.com/i5592145/c5cadf2f9bbbb28a.png)
解决方法是:Other Linker Flags里加一下这个-fprofile-instr-generate
查了一下关于profile-instr-generate的说明如下:
-fprofile-instr-generate=<file>
Generate instrumented code to collect execution counts into <file>
(overridden by LLVM_PROFILE_FILE env var)
-fprofile-instr-generate
Generate instrumented code to collect execution counts into default.profraw file
(overridden by '=' form of option or LLVM_PROFILE_FILE env var)
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