[CMake] Get rid of explicit dependencies to include/clang/*.inc and introduce CLANG_TABLEGEN_TARGETS.

This does;
  - clang_tablegen() adds each tblgen'd target to global property CLANG_TABLEGEN_TARGETS as list.
  - List of targets is added to LLVM_COMMON_DEPENDS.
  - all clang libraries and targets depend on generated headers.

You might wonder this would be regression, but in fact, this is little loss.
  - Almost all of clang libraries depend on tblgen'd files and clang-tblgen.
  - clang-tblgen may cause short stall-out but doesn't cause unconditional rebuild.
  - Each library's dependencies to tblgen'd files might vary along headers' structure.
    It made hard to track and update *really optimal* dependencies.

Each dependency to intrinsics_gen and ClangSACheckers is left as DEPENDS.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201842 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fe9974edbb..38b14b5a0f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -268,6 +268,7 @@ function(clang_tablegen)
   if( CTG_TARGET )
     add_custom_target( ${CTG_TARGET} DEPENDS ${output_file} ${CTG_DEPENDS} )
     set_target_properties( ${CTG_TARGET} PROPERTIES FOLDER "Clang tablegenning")
+    set_property(GLOBAL APPEND PROPERTY CLANG_TABLEGEN_TARGETS ${CTG_TARGET})
   endif()
 endfunction(clang_tablegen)
 
@@ -405,6 +406,11 @@ mark_as_advanced(CLANG_EXECUTABLE_VERSION LIBCLANG_LIBRARY_VERSION)
 add_subdirectory(utils/TableGen)
 
 add_subdirectory(include)
+
+# All targets below may depend on all tablegen'd files.
+get_property(CLANG_TABLEGEN_TARGETS GLOBAL PROPERTY CLANG_TABLEGEN_TARGETS)
+list(APPEND LLVM_COMMON_DEPENDS ${CLANG_TABLEGEN_TARGETS})
+
 add_subdirectory(lib)
 add_subdirectory(tools)
 add_subdirectory(runtime)