macos - Apple gcc：/usr/bin/gcc-4.2 和 /usr/bin/i686-apple-darwin11-llvm-gcc-4.2 有什么区别？

Question

我正在运行狮子。我有这两个版本gcc都声称是同一件事，但diff声称二进制文件不同。我试图了解gccOS X 上的情况。它们之间有什么区别？

$ /usr/bin/gcc-4.2 --version
i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.9.00)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ /usr/bin/i686-apple-darwin11-llvm-gcc-4.2 --version
i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.9.00)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ diff /usr/bin/gcc-4.2 /usr/bin/i686-apple-darwin11-llvm-gcc-4.2
Binary files /usr/bin/gcc-4.2 and /usr/bin/i686-apple-darwin11-llvm-gcc-4.2 differ