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relates to:

• SR-60 exit status 127 when compiling a C dependency

Issue Description:

I tried to write a simple hello world command line executable to test Swift. The Swift build command exits with linker error 127.

Log: (Jira will detect "PATH" as a macro, ignore it)

coleman@ubuntu:export PATH='/home/coleman/Swift/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/bin':"${PATH}"
coleman@ubuntu:~/Swift/HelloWorld$ swift build -v
/home/coleman/Swift/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/bin/swiftc -module-name HelloWorld -incremental -emit-dependencies -emit-module -emit-module-path /home/coleman/Swift/HelloWorld/.build/debug/HelloWorld.swiftmodule -output-file-map /home/coleman/Swift/HelloWorld/.build/debug/HelloWorld.o/HelloWorld/output-file-map.json -c /home/coleman/Swift/HelloWorld/main.swift -I /home/coleman/Swift/HelloWorld/.build/debug -j8 -Onone -g -I /usr/local/include
/home/coleman/Swift/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/bin/swiftc -o /home/coleman/Swift/HelloWorld/.build/debug/HelloWorld /home/coleman/Swift/HelloWorld/.build/debug/HelloWorld.o/main.swift.o -L/usr/local/lib
<unknown>:0: error: link command failed with exit code 127 (use -v to see invocation)
<unknown>:0: error: build had 1 command failures
swift-build: exit(1): ["/home/coleman/Swift/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/bin/swift-build-tool", "-v", "-f", "/home/coleman/Swift/HelloWorld/.build/debug/HelloWorld.o/llbuild.yaml"]

I've attached the simple project.