[LLVMbugs] [Bug 23162] New: CMake build should support a host with CLT Command Line Tools installed but not Xcode

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23162

            Bug ID: 23162
           Summary: CMake build should support a host with CLT Command
                    Line Tools installed but not Xcode
           Product: compiler-rt
           Version: unspecified
          Hardware: All
                OS: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: compiler-rt
          Assignee: unassignedbugs at nondot.org
          Reporter: jonathan+llvm at pinacea.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 14169
  --> https://llvm.org/bugs/attachment.cgi?id=14169&action=edit
Patch CMakeLists.txt test exit code of xcodebuild

When you run Cmake to configure 'compiler-rt' it issues a few commands with
xcodebuild to detect the SDK Path.
But when Xcode is not installed xcodebuild / xcrun / ... doesn't return an
empty string but instead a message "Error: ....." which obviously isn't a valid
answer and path

The patch attached solve this issue by checking the return/exit code of
xcodebuild and in that case change the path content to an empty string.

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