LLVM-GCC4.2 instructions forget to mention --program-prefix option.

[llvmbot]

Bugzilla Link	2037
Resolution	FIXED
Resolved on	Oct 15, 2008 11:39
Version	2.2
OS	Linux
Reporter	LLVM Bugzilla Contributor
CC	@tlattner

Extended Description

While upgrading to LLVM-GCC-4.2 and LLVM-2.2 I stupidly followed the instructions without giving a lot of thought and failed to notice that the README.LLVM doesn't mention --program-prefix as an option to ./configure anymore. The result was me getting horribly confused as all my llvm-gcc calls still reported a version 4.0.1 GCC.

[llvmbot]

I think the problem is (or was) that --program-prefix could cause
problems with the build. I'm not sure if that is the case with
llvm-gcc-4.2 or if it was only a 4.0 issue. There's some discussion
of --program-prefix in #1808 . I've added that as blocking this one.

[tlattner]

I did 2.2 release testing program-prefix enabled. I did bootstrap on darwin and it worked fine with that flag set as well. So the docs should be changed like they are for 4.0.

I don't think this bug depends on 1436.

[lattner]

This is fixed, and doesn't depend on 1436.