[cmake] Support moving debuginfo-tests to llvm/projects

[hintonda]

Summary

Support moving debuginfo-tests to llvm/projects

---

(see D40971)
This is one of two independent patches designed to support moving the
debuginfo-test repo from clang/test to llvm/projects. While each
patch is completely independent and can be applied seperately, both
are required to actually move the repo.

Due to the independent nature of these patches, debuginfo-test can
coexist in both clang/test and llvm/projects, so testers can add
debuginfo-test to llvm/projects without the need to immediately remove
it from clang/test.

Once both patches land and all buildbots have moved debuginfo-test to
llvm/projects, llvm/utils/test-debuginfo.pl can be removed as well the
tools reference to it in clang/test/lit.cfg.py. At which point, only
llvm/projects will be supported.

[hintonda]

• Simply diff.

llvm/trunk/CMakeLists.txt

if(DYLD_LIBRARY_PATH)
     endforeach()
   endif()
 endif()
 
 # Side-by-side subprojects layout: automatically set the
 # LLVM_EXTERNAL_${project}_SOURCE_DIR using LLVM_ALL_PROJECTS
 # This allows an easy way of setting up a build directory for llvm and another
 # one for llvm+clang+... using the same sources.
-set(LLVM_ALL_PROJECTS "clang;libcxx;libcxxabi;lldb;compiler-rt;lld;polly")
+set(LLVM_ALL_PROJECTS "clang;libcxx;libcxxabi;lldb;compiler-rt;lld;polly;debuginfo-tests")
 set(LLVM_ENABLE_PROJECTS "" CACHE STRING
   "Semicolon-separated list of projects to build (${LLVM_ALL_PROJECTS}), or \"all\".")
 if( LLVM_ENABLE_PROJECTS STREQUAL "all" )
   set( LLVM_ENABLE_PROJECTS ${LLVM_ALL_PROJECTS})
 endif()
 foreach(proj ${LLVM_ENABLE_PROJECTS})
   set(PROJ_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../${proj}")
   if(NOT EXISTS "${PROJ_DIR}" OR NOT IS_DIRECTORY "${PROJ_DIR}")

llvm/trunk/projects/CMakeLists.txt

 # Discover the projects that use CMake in the subdirectories.
 # Note that explicit cmake invocation is required every time a new project is
 # added or removed.
 file(GLOB entries *)
 foreach(entry ${entries})
   if(IS_DIRECTORY ${entry} AND EXISTS ${entry}/CMakeLists.txt)
     if((NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/compiler-rt) AND
        (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/dragonegg) AND
        (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/libcxx) AND
        (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/libcxxabi) AND
        (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/libunwind) AND
        (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/test-suite) AND
        (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/parallel-libs) AND
-       (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/openmp))
+       (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/openmp) AND
+       (NOT ${entry} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR}/debuginfo-tests))
       add_subdirectory(${entry})
     endif()
   endif()
 endforeach(entry)
 
 # Also add in libc++ and compiler-rt trees if present (and we have
 # a sufficiently recent version of CMake where required).
 if(${LLVM_BUILD_RUNTIME})
if(${LLVM_BUILD_RUNTIME})
   if(NOT LLVM_BUILD_EXTERNAL_COMPILER_RT)
     add_llvm_external_project(compiler-rt)
   endif()
 endif()
 
 add_llvm_external_project(dragonegg)
 add_llvm_external_project(parallel-libs)
 add_llvm_external_project(openmp)
+
+if(LLVM_INCLUDE_TESTS)
+  add_llvm_external_project(debuginfo-tests)
+endif()