Change interface to Path class:
readable -> canRead
writable -> canWrite
executable -> canExecute

More (incremental) changes coming to close 495.

llvm-svn: 22345

llvm-svn: 21704

result in returning executable files that won't be runnable.

llvm-svn: 21378

llvm-svn: 19605

gdb debugger doesn't get confused on which file it is reading (the one in
lib/System or the one in lib/System/{Win32,Unix})

llvm-svn: 19426

* Ensure #includes are wrapped with appropriate HAVE_ guards

llvm-svn: 19156

llvm-svn: 19045

Move the functionality of RunProgramWithTimeout into the ExecuteAndWait
function: support a timeout and I/O redirects

llvm-svn: 19043

Implement the new environment pointer for ExecuteAndWait

llvm-svn: 18928

llvm-svn: 18785

llvm-svn: 17498

cleanly dissociated from the sys::Path class.

llvm-svn: 16315

Move include/Config and include/Support into include/llvm/Config,
include/llvm/ADT and include/llvm/Support. From here on out, all LLVM
public header files must be under include/llvm/.

llvm-svn: 16137

llvm-svn: 16100

"Program" operating system concept (find and execute programs).

llvm-svn: 16084