llvm-config 2.4 in msys.bat - double slashes in generated paths

[llvmbot]

Bugzilla Link	3348
Version	2.4
OS	Windows XP
Reporter	LLVM Bugzilla Contributor
CC	@asl

Extended Description

When run from msys.bat (but not when run from DOS prompt), llvm-config outputs double slashes for pathnames:

$ llvm-config --cxxflags --ldflags --libs
-I//include [...]
-L//lib [...]
-lLLVMLinker [...]
//lib/LLVMExecutionEngine.o [...]

g++ (3.4.5 at least) fails to understand these. llvm-config produces single slashes from DOS prompt, and g++ works correctly.

My llvm-config was built using ./configure --prefix=
This may not be the correct way of configuring for "top level" installation.

[llvmbot]

From Óscar Fuentes on llvm-dev mailing list:

This one also deserves a bug report. My guess is that llvm-config is
throwing backslashes () which are escaped at some intermediate point
and finally translated to double slashes by MSYS.