[LLVMbugs] [Bug 8199] New: llvm-lit seems to prepend llvm-gcc install dir ahead of the build artifacts dir in PATH

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8199

           Summary: llvm-lit seems to prepend llvm-gcc install dir ahead
                    of the build artifacts dir in PATH
           Product: Test Suite
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: lit
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: jasonwkim at google.com
                CC: llvmbugs at cs.uiuc.edu, daniel at zuster.org


To make a long story short, in some cases, llvm-gcc installation directory gets
prepended to the PATH when llvm-lit executes the test.  

The result is that if llvm-gcc is available in PATH during an llvm
configure/build cycle, llvmconfigure places the llvm-gcc path, and llvm-lit
then seems to use that directory instead of the build dir, which means some
strange executable called "llc" from a possibly left over install; directory
can be executed instead of the freshly compiled version.

The offending line seems to be around line 61 of test/lit.cfg 

when I comment out the line "config.environment['PATH'] = path", some tests
fail as expected.

I suppose the fix can be as simple as removing that line, but I have no idea
what impact that has on the rest of the test infrastructure.

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