http://llvm.org/bugs/show_bug.cgi?id=20539
Bug ID: 20539
Summary: lld crashes when linking x86_64 Mach-O file
Product: lld
Version: unspecified
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: release blocker
Priority: P
Component: All Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 12857
--> http://llvm.org/bugs/attachment.cgi?id=12857&action=edit
test.c, a harmless C file
For some `test.o`, compiled with `clang -c test.c`, running the command,
`lld -flavor darwin test.o`
fails with the following build output:
```
Unknown arch
UNREACHABLE executed at ArchHandler.cpp:46!
0 libLLVM-3.6svn.dylib 0x000000010ececf37
llvm::sys::PrintStackTrace(__sFILE*) + 40
1 libLLVM-3.6svn.dylib 0x000000010eced322 SignalHandler(int) + 248
2 libsystem_platform.dylib 0x00007fff975c95aa _sigtramp + 26
3 libsystem_platform.dylib 0x00007f9cfac00000 _sigtramp + 1667459696
4 libLLVM-3.6svn.dylib 0x000000010eced189 abort + 22
5 libLLVM-3.6svn.dylib 0x000000010ecdb673 LLVMInstallFatalErrorHandler + 0
6 lld 0x000000010e064149
7 lld 0x000000010e06a928
8 lld 0x000000010e06cccb
9 lld 0x000000010e04cca4
10 lld 0x000000010e055315
11 lld 0x000000010e04bbc0
12 libdyld.dylib 0x00007fff96afc5fd start + 1
13 libdyld.dylib 0x0000000000000004 start + 1766865416
Stack dump:
0. Program arguments: /usr/local/opt/llvm/bin/lld -flavor darwin test.o
Illegal instruction: 4
```
Only the flags `-flavor darwin` could be passed, because LLD did not recognize
the `-target` flag when it was passed, nor did it work without the `-flavor`
flag.
This is using the lld HEAD, llvm HEAD, and clang HEAD, 2014-07-05, (llvm
3.6.0pre). However I saw this same error at least a month ago.
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