fix llvm15 compilation error

With llvm15, bcc failed the compilation with the following errors:
  [100%] Building CXX object tests/cc/CMakeFiles/test_libbcc.dir/test_shared_table.cc.o
  /home/yhs/work/llvm-project/llvm/build/install/lib/libclangSema.a(SemaRISCVVectorLookup.cpp.o):
    In function `(anonymous namespace)::RISCVIntrinsicManagerImpl::InitIntrinsicList()':
    SemaRISCVVectorLookup.cpp:
    (.text._ZN12_GLOBAL__N_125RISCVIntrinsicManagerImpl17InitIntrinsicListEv+0x14b):
    undefined reference to `clang::RISCV::RVVIntrinsic::computeBuiltinTypes(
      llvm::ArrayRef<clang::RISCV::PrototypeDescriptor>, bool, bool, bool, unsigned int)'
    SemaRISCVVectorLookup.cpp:(.text._ZN12_GLOBAL__N_125RISCVIntrinsicManagerImpl17InitIntrinsicListEv+0x182):
     undefined reference to `clang::RISCV::RVVIntrinsic::computeBuiltinTypes(
     llvm::ArrayRef<clang::RISCV::PrototypeDescriptor>, bool, bool, bool, unsigned int)'
  ...
  make[1]: *** [CMakeFiles/Makefile2:1110: examples/cpp/CMakeFiles/CGroupTest.dir/all] Error 2
  ...
The failure is due to llvm upstream patch https://reviews.llvm.org/D111617
which introduced another dependency on libclangSupport.a for bcc.
To fix the issue, I added libclangSupport in cmake file.

Signed-off-by: Yonghong Song <[email protected]>

CMakeLists.txt

@@ -131,6 +131,9 @@ find_library(libclangRewrite NAMES clangRewrite clang-cpp HINTS ${CLANG_SEARCH})
 find_library(libclangSema NAMES clangSema clang-cpp HINTS ${CLANG_SEARCH})
 find_library(libclangSerialization NAMES clangSerialization clang-cpp HINTS ${CLANG_SEARCH})
 find_library(libclangASTMatchers NAMES clangASTMatchers clang-cpp HINTS ${CLANG_SEARCH})
+if (${LLVM_PACKAGE_VERSION} VERSION_EQUAL 15 OR ${LLVM_PACKAGE_VERSION} VERSION_GREATER 15)
+ find_library(libclangSupport NAMES clangSupport clang-cpp HINTS ${CLANG_SEARCH})
+endif()
 find_library(libclang-shared libclang-cpp.so HINTS ${CLANG_SEARCH})
 if(libclangBasic STREQUAL "libclangBasic-NOTFOUND")
  message(FATAL_ERROR "Unable to find clang libraries")

cmake/clang_libs.cmake

@@ -50,7 +50,13 @@ list(APPEND clang_libs
  ${libclangRewrite}
  ${libclangEdit}
  ${libclangAST}
- ${libclangLex}
+ ${libclangLex})
+
+# if (${LLVM_PACKAGE_VERSION} VERSION_EQUAL 15 OR ${LLVM_PACKAGE_VERSION} VERSION_GREATER 15)
+ list(APPEND clang_libs ${libclangSupport})
+# endif()
+
+list(APPEND clang_libs
  ${libclangBasic})
 endif()