Not working for chromium

[GittyHarsha]

Hi,
I really appreciate the tool which is very required for software engineering.
I want to apply clang-uml to obtain class diagram for components/content_settings present in Chromium.

I installed clang-uml 0.6.2 from the windows .exe installer.
Here is the .config-uml YAML file:

compilation_database_dir: Q:/Chromium/src
output_directory: Q:/Chromium/src/diagrams

query_driver: Q:/Chromium/src/third_party/llvm-build/Release+Asserts/bin/clang-cl.exe

add_compile_flags:
  - -I./out/debug_x64
  - -Wno-unknown-warning-option
  - -Wno-unknown-pragmas
remove_compile_flags:
  - -Werror
  - -Wunknown-pragmas

diagrams:
  content_settings_class_diagram:
    type: class
    glob:
      - components/content_settings/**/*.h
      - components/content_settings/**/*.cc
    include:
      namespaces: []
    exclude:
      namespaces:
       - base
    mermaid:
      before:
        - '%% Content Settings Class Diagram'

Well, it didnt work and gave me these errors after obtaining the translation unit:

ERROR: Failed to generate class diagram 'content_settings_class_diagram' due to following issues:
 - [WARNING] argument unused during compilation: '/c'
 - [ERROR] third_party/libc++/src/include/__memory_resource/memory_resource.h:30: reference to unresolved using declaration
 - [NOTE] third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] third_party/libc++/src/include/__memory_resource/memory_resource.h:30: reference to unresolved using declaration
 - [NOTE] third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] third_party/libc++/src/include/__memory_resource/polymorphic_allocator.h:86: reference to unresolved using declaration
 - [NOTE] third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] third_party/libc++/src/include/__memory_resource/polymorphic_allocator.h:86: reference to unresolved using declaration
 - [NOTE] third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] third_party/libc++/src/include/__memory_resource/polymorphic_allocator.h:90: reference to unresolved using declaration
 - [NOTE] third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] third_party/libc++/src/include/__memory_resource/polymorphic_allocator.h:90: reference to unresolved using declaration
 - [NOTE] third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:38: use of undeclared identifier 'max_align_t'; did you mean 'std::max_align_t'?
 - [NOTE] third_party/libc++/src/include/__cstddef/max_align_t.h:22: 'std::max_align_t' declared here
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:38: reference to unresolved using declaration
 - [NOTE] third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:38: unknown type name 'max_align_t'
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:40: static assertion expression is not an integral constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:40: initializer of 'kAlignment' is unknown
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:37: declared here
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:42: static assertion expression is not an integral constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:42: initializer of 'kAlignment' is unknown
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:37: declared here
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:46: constexpr variable 'kAlignmentIndex' must be initialized by a constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:46: initializer of 'kAlignment' is unknown
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:37: declared here
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:47: static assertion expression is not an integral constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:47: initializer of 'kAlignment' is unknown
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:37: declared here
 - [ERROR] third_party/abseil-cpp/absl/functional/internal/any_invocable.h:85: reference to unresolved using declaration
 - [NOTE] third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:55: constexpr variable 'kStep' must be initialized by a constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:55: initializer of 'kAlignment' is unknown
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/partition_alloc_forward.h:37: declared here
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:63: constexpr function never produces a constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:64: initializer of 'kStep' is not a constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:55: declared here
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:151: constexpr variable 'kMinExponential' must be initialized by a constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:152: initializer of 'kStep' is not a constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:55: declared here
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:153: constexpr variable 'kMaxLinear' must be initialized by a constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:154: initializer of 'kStep' is not a constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:55: declared here
 - [ERROR] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:155: static assertion expression is not an integral constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:155: initializer of 'kMinExponential' is not a constant expression
 - [NOTE] base/allocator/partition_allocator/src/partition_alloc/bucket_lookup.h:151: declared here
 - [FATAL] too many errors emitted, stopping now

is it because of the mismatch of the clang version?
I see that chromium uses clang 22 git snapshot and clang-uml?

I even tried to build clang-uml using latest llvm version using CMAKE but it failed.

Please help me out!

[GittyHarsha]

@bkryza

[bkryza]

@GittyHarsha For chromium I have a working example for Linux here, but unfortunately never tried it on Windows.

Few comments:

• query_driver does not work on Windows
• the error could be due to the version mismatch in LLVM (can you checkout earlier Chromium commit/branch that uses LLVM 21 and check if it helps)?
• the error could also be due to some include paths being implicit during build and not included in the compilation database, can you paste one entry from the compilation database json from Q:/Chromium/src?

[GittyHarsha]

here is the first entry of the compilation database

  {
    "directory": "Q:\\Chromium\\src\\out\\debug_x64",
    "command": "..\\..\\third_party\\llvm-build\\Release+Asserts\\bin\\clang-cl.exe --driver-mode=cl /c ../../apps/app_lifetime_monitor.cc /Foobj/apps/apps/app_lifetime_monitor.obj /showIncludes:user /winsysroot../../third_party/depot_tools/win_toolchain/vs_files/db49a6c5dd -D_HAS_NODISCARD -D_CRT_NONSTDC_NO_WARNINGS -D_WINSOCK_DEPRECATED_NO_WARNINGS \"-DCR_CLANG_REVISION=\\\"llvmorg-21-init-16348-gbd809ffb-17\\\"\" -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE -DCOMPONENT_BUILD -D_LIBCPP_INSTRUMENTED_WITH_ASAN=0 -DCR_LIBCXX_REVISION=8c14dcef22e0cd2266b0aeadd194739f95b18b96 -D__STD_C -D_CRT_RAND_S -D_CRT_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_DEPRECATE -D_ATL_NO_OPENGL -D_WINDOWS -DCERT_CHAIN_PARA_HAS_EXTRA_FIELDS -DPSAPI_VERSION=2 -DWIN32 -D_SECURE_ATL -DWINAPI_FAMILY=WINAPI_FAMILY_DESKTOP_APP -DDCHECK_ALWAYS_ON=1 -DUSE_AURA=1 -DWIN32_LEAN_AND_MEAN -DNOMINMAX -D_UNICODE -DUNICODE -DNTDDI_VERSION=NTDDI_WIN11_GE -D_WIN32_WINNT=0x0A00 -DWINVER=0x0A00 -D_DEBUG -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DSK_ENABLE_SKSL -DSK_UNTIL_CRBUG_1187654_IS_FIXED \"-DSK_USER_CONFIG_HEADER=\\\"../../skia/config/SkUserConfig.h\\\"\" -DSK_WIN_FONTMGR_NO_SIMULATIONS -DSK_DISABLE_LEGACY_INIT_DECODERS -DSK_CODEC_DECODES_JPEG -DSK_CODEC_ENCODES_JPEG -DSKIA_DLL -DSKCMS_API=__declspec(dllexport) -DGR_GL_FUNCTION_TYPE=__stdcall -DSK_GAMMA_SRGB -DSK_GAMMA_CONTRAST=1.0 -DSK_GANESH \"-DSK_GPU_WORKAROUNDS_HEADER=\\\"gpu/config/gpu_driver_bug_workaround_autogen.h\\\"\" -DSK_GL -DSK_VULKAN=1 -DSK_GRAPHITE -DSK_DAWN -DVK_USE_PLATFORM_WIN32_KHR -DCHROMIUM -DLIBYUV_DISABLE_NEON -DLIBYUV_DISABLE_SVE -DLIBYUV_DISABLE_SME -DLIBYUV_DISABLE_LSX -DLIBYUV_DISABLE_LASX -D_WTL_NO_AUTOMATIC_NAMESPACE -DTOOLKIT_VIEWS=1 -DON_FOCUS_PING_ENABLED -DABSL_CONSUME_DLL -DABSL_FLAGS_STRIP_NAMES=0 -DBORINGSSL_SHARED_LIBRARY -DGOOGLE_PROTOBUF_NO_RTTI -DPROTOBUF_USE_DLLS -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DUSE_CHROMIUM_ICU=1 -DU_ENABLE_TRACING=1 -DU_ENABLE_RESOURCE_TRACING=0 -DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE -DPROTOBUF_ENABLE_DEBUG_LOGGING_MAY_LEAK_PII=0 -DWEBRTC_ENABLE_SYMBOL_EXPORT -DWEBRTC_ENABLE_AVX2 -DRTC_ENABLE_WIN_WGC -DWEBRTC_CHROMIUM_BUILD -DWEBRTC_WIN -DABSL_ALLOCATOR_NOTHROW=1 -DLOGGING_INSIDE_WEBRTC -DWGPU_SHARED_LIBRARY -DCRASHPAD_ZLIB_SOURCE_EXTERNAL -DLEVELDB_PLATFORM_CHROMIUM=1 -DLEVELDB_SHARED_LIBRARY -DVK_NO_PROTOTYPES -DV8_USE_EXTERNAL_STARTUP_DATA -DUSING_V8_SHARED -DUSING_V8_SHARED_PRIVATE -DV8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT=0 -DV8_ARRAY_BUFFER_VIEW_INTERNAL_FIELD_COUNT=0 -DV8_PROMISE_INTERNAL_FIELD_COUNT=0 -DV8_USE_DEFAULT_HASHER_SECRET=true -DV8_ENABLE_CHECKS -DV8_ENABLE_MEMORY_ACCOUNTING_CHECKS -DV8_COMPRESS_POINTERS -DV8_COMPRESS_POINTERS_IN_SHARED_CAGE -DV8_31BIT_SMIS_ON_64BIT_ARCH -DV8_ENABLE_SANDBOX -DV8_DEPRECATION_WARNINGS -DV8_USE_PERFETTO -DV8_HAVE_TARGET_OS -DV8_TARGET_OS_WIN -DCPPGC_ENABLE_API_CHECKS -DCPPGC_CAGED_HEAP -DCPPGC_YOUNG_GENERATION -DCPPGC_POINTER_COMPRESSION -DCPPGC_ENABLE_LARGER_CAGE -DCPPGC_SLIM_WRITE_BARRIER -DFLATBUFFERS_LOCALE_INDEPENDENT=0 -I../.. -Igen -I../../buildtools/third_party/libc++ -I../../third_party/perfetto/include -Igen/third_party/perfetto/build_config -Igen/third_party/perfetto -I../../third_party/skia -Igen/third_party/skia -I../../third_party/wuffs/src/release/c -I../../third_party/vulkan-headers/src/include -Igen/third_party/dawn/include -I../../third_party/dawn/include -I../../third_party/khronos -I../../gpu -I../../net/third_party/quiche/overrides -I../../net/third_party/quiche/src/quiche/common/platform/default -I../../net/third_party/quiche/src -I../../third_party/libyuv/include -Igen/third_party/private_membership/src -Igen/third_party/shell-encryption/src -Igen/components/policy/proto -I../../third_party/wtl/include -I../../base/allocator/partition_allocator/src -Igen/base/allocator/partition_allocator/src -I../../third_party/abseil-cpp -I../../third_party/boringssl/src/include -I../../third_party/protobuf/src -I../../third_party/ipcz/include -Igen/net/third_party/quiche/src -I../../third_party/re2/src -I../../third_party/ced/src -I../../third_party/icu/source/common -I../../third_party/icu/source/i18n -I../../third_party/webrtc_overrides -I../../third_party/webrtc -Igen/third_party/webrtc -I../../third_party/crashpad/crashpad -I../../third_party/crashpad/crashpad/compat/win -I../../third_party/zlib -I../../third_party/libwebm/source -I../../third_party/angle/include -I../../third_party/leveldatabase -I../../third_party/leveldatabase/src -I../../third_party/leveldatabase/src/include -I../../third_party/libaom/source/libaom -I../../third_party/libaom/source/config/win/x64 -I../../v8/include -I../../third_party/flatbuffers/src/include -I../../third_party/flatbuffers/src/src -I../../third_party/flatbuffers/src -I../../third_party/flatbuffers/generated /W4 -Wimplicit-fallthrough -Wextra-semi -Wunreachable-code-aggressive -Wgnu -Wno-gnu-anonymous-struct -Wno-gnu-conditional-omitted-operand -Wno-gnu-include-next -Wno-gnu-label-as-value -Wno-gnu-redeclared-enum -Wno-gnu-statement-expression -Wno-gnu-zero-variadic-macro-arguments -Wno-zero-length-array -Wthread-safety -Wno-missing-field-initializers -Wno-unused-parameter -Wno-psabi -Wloop-analysis -Wno-unneeded-internal-declaration -Wno-cast-function-type -Wno-thread-safety-reference-return -Wno-nontrivial-memcall -Wno-nonportable-include-path -Wexit-time-destructors -Wshadow /WX -fno-delete-null-pointer-checks /clang:-fno-strict-overflow -fno-ident /clang:-fno-math-errno -fcolor-diagnostics -fmerge-all-constants /Zc:sizedDealloc- -fcrash-diagnostics-dir=../../tools/clang/crashreports -mllvm -instcombine-lower-dbg-declare=0 -mllvm -split-threshold-for-reg-with-hint=0 /clang:-ffp-contract=off -fcomplete-member-pointers /Gy /FS /bigobj /utf-8 /Zc:twoPhase -ffile-reproducible /D__WRL_ENABLE_FUNCTION_STATICS__ -fmsc-version=1934 /Zc:dllexportInlines- -m64 -msse3 /Brepro -Wno-builtin-macro-redefined -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -ffile-compilation-dir=. -no-canonical-prefixes --warning-suppression-mappings=../../build/config/warning_suppression.txt -ftrivial-auto-var-init=pattern /Od /Ob0 /GF /Z7 -gno-codeview-command-line -mllvm -pick-merged-source-locations -gcodeview-ghash /guard:cf,nochecks /MDd -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -DUNSAFE_BUFFERS_BUILD -Wno-redundant-parens -Wno-redundant-parens -Wno-null-pointer-subtraction -Wno-constant-conversion -Wno-shorten-64-to-32 /TP -Wno-invalid-offsetof -Wenum-compare-conditional -Wno-nullability-completeness /std:c++20 -Wno-trigraphs /GR- -I../../third_party/libc++/src/include /Fd\"obj/apps/apps_cc.pdb\"",
    "file": "../../apps/app_lifetime_monitor.cc",
    "output": "obj/apps/apps/app_lifetime_monitor.obj"
  },

[GittyHarsha]

this is what i get why I try to build clang-uml using latest llvm version as of today

     4>Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1158,58): error C2039: 'Elaborated': is not
        a member of 'clang::Type' [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
             C:\clang-uml\include\clang\AST\TypeBase.h(1833,30):
             see declaration of 'clang::Type'

     4>Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1158,58): error C2065: 'Elaborated': undecl
       ared identifier [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
     4>Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1160,32): error C2039: 'ElaboratedType': is
        not a member of 'clang' [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
             C:\clang-uml\include\clang\Lex\Preprocessor.h(67,11):
             see declaration of 'clang'

     4>Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1160,32): error C2065: 'ElaboratedType': un
       declared identifier [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
     4>Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1160,20): error C2672: 'clang::cast': no ma
       tching overloaded function found [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
             C:\clang-uml\include\llvm\Support\Casting.h(559,37):
             could be 'decltype(auto) llvm::cast(const From &)'
                 Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1160,32):
                 'llvm::cast': invalid template argument for 'To', type expected
             C:\clang-uml\include\llvm\Support\Casting.h(565,37):
             or       'decltype(auto) llvm::cast(From &)'
                 Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1160,32):
                 'llvm::cast': invalid template argument for 'To', type expected
             C:\clang-uml\include\llvm\Support\Casting.h(571,37):
             or       'decltype(auto) llvm::cast(From *)'
                 Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1160,32):
                 'llvm::cast': invalid template argument for 'To', type expected
             C:\clang-uml\include\llvm\Support\Casting.h(577,37):
             or       'decltype(auto) llvm::cast(std::unique_ptr<S,std::default_delete<S>> &&)'
                 Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1160,32):
                 'llvm::cast': invalid template argument for 'To', type expected

     4>Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1164,13): error C3536: 'tag_decl': cannot b
       e used before it is initialized [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
     4>Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1164,22): error C2446: '==': no conversion
       from 'nullptr' to '<error type>' [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
             Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1164,25):
             A native nullptr can only be converted to bool or, using reinterpret_cast, to an integral type

     4>Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1168,13): error C3536: 'enum_decl': cannot
       be used before it is initialized [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
     4>Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1168,23): error C2446: '!=': no conversion
       from 'nullptr' to '<error type>' [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
             Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1168,26):
             A native nullptr can only be converted to bool or, using reinterpret_cast, to an integral type

     4>Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1195,73): error C2440: 'return': cannot con
       vert from 'clang::TemplateDecl *' to 'const clang::ConceptDecl *' [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-bu
       ild\src\clang-umllib.vcxproj]
             Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1195,73):
             Cast from base to derived requires dynamic_cast or static_cast

     4>Done Building Project "Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj" (default targe
       ts) -- FAILED.
     3>Done Building Project "Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\ALL_BUILD.vcxproj" (default targets) --
       FAILED.
     1>Done Building Project "Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\INSTALL.vcxproj" (default targets) -- FA
       ILED.

Build FAILED.

       "Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\INSTALL.vcxproj" (default target) (1) ->
       "Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\ALL_BUILD.vcxproj" (default target) (3) ->
       "Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj" (default target) (4) ->
       (ClCompile target) ->
         C:\clang-uml\include\clang\AST\TemplateName.h(429,61): warning C4805: '|': unsafe mix of type 'unsigned int' a
       nd type 'bool' in operation [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
         C:\clang-uml\include\clang\AST\TypeBase.h(6444,36): warning C4805: '|': unsafe mix of type 'uintptr_t' and typ
       e 'bool' in operation [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]


       "Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\INSTALL.vcxproj" (default target) (1) ->
       "Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\ALL_BUILD.vcxproj" (default target) (3) ->
       "Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj" (default target) (4) ->
       (ClCompile target) ->
         Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1158,58): error C2039: 'Elaborated': is n
       ot a member of 'clang::Type' [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
         Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1158,58): error C2065: 'Elaborated': unde
       clared identifier [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
         Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1160,32): error C2039: 'ElaboratedType':
       is not a member of 'clang' [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
         Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1160,32): error C2065: 'ElaboratedType':
       undeclared identifier [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
         Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1160,20): error C2672: 'clang::cast': no
       matching overloaded function found [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
         Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1164,13): error C3536: 'tag_decl': cannot
        be used before it is initialized [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
         Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1164,22): error C2446: '==': no conversio
       n from 'nullptr' to '<error type>' [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
         Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1168,13): error C3536: 'enum_decl': canno
       t be used before it is initialized [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
         Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1168,23): error C2446: '!=': no conversio
       n from 'nullptr' to '<error type>' [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-build\src\clang-umllib.vcxproj]
         Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml\src\common\clang_utils.cc(1195,73): error C2440: 'return': cannot c
       onvert from 'clang::TemplateDecl *' to 'const clang::ConceptDecl *' [Q:\Chromium\clang-uml-tmp\llvm-build\clang-uml-
       build\src\clang-umllib.vcxproj]

    2 Warning(s)
    10 Error(s)

[bkryza]

Sorry but LLVM 22git is not supported yet, I usually only add support after official LLVM version is released.

[GittyHarsha]

ok. I'll wait!

[bkryza]

@GittyHarsha Out of curosity I tried to reproduce your issue on Windows 10 VM with clang-uml 0.6.2 on latest Chromium code and I get the same error:

[debug] [tid 8020] [diagram.h:317] Adding class: ::HDC__, HDC__
[debug] [tid 8020] [diagram.h:317] Adding class: ::_OVERLAPPED, _OVERLAPPED
[debug] [tid 8020] [diagram.h:317] Adding class: ::HWINSTA__, HWINSTA__
[debug] [tid 8020] [diagram.h:317] Adding class: ::HMONITOR__, HMONITOR__
[debug] [tid 8020] [diagram.h:317] Adding class: ::HRGN__, HRGN__
[debug] [tid 8020] [diagram.h:317] Adding class: ::HKL__, HKL__
[debug] [tid 8020] [diagram.h:317] Adding class: ::tagFORMATETC, tagFORMATETC
[debug] [tid 8020] [diagram.h:317] Adding class: partition_alloc::PartitionStatsDumper, partition_alloc::PartitionStatsDumper
[debug] [tid 8020] [diagram.h:317] Adding class: ::tagMENUITEMINFOW, tagMENUITEMINFOW
[debug] [tid 8020] [diagram.h:317] Adding class: content_settings::mojom::ContentSettingsPatternDataView, content_settings::mojom::ContentSettingsPatternDataView
[debug] [tid 8020] [diagram.h:317] Adding class: ::HBITMAP__, HBITMAP__
[debug] [tid 8020] [diagram.h:317] Adding class: ::HDESK__, HDESK__
ERROR: Failed to generate class diagram 'content_settings_class_diagram' due to following issues:
 - [WARNING] unknown argument ignored in clang-cl: '--warning-suppression-mappings=../../build/config/warning_suppression.txt'
 - [WARNING] argument unused during compilation: '/c'
 - [ERROR] src/third_party/libc++/src/include/__memory_resource/memory_resource.h:30: reference to unresolved using declaration
 - [NOTE] src/third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] src/third_party/libc++/src/include/__memory_resource/memory_resource.h:30: reference to unresolved using declaration
 - [NOTE] src/third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] src/third_party/libc++/src/include/__memory_resource/polymorphic_allocator.h:86: reference to unresolved using declaration
 - [NOTE] src/third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] src/third_party/libc++/src/include/__memory_resource/polymorphic_allocator.h:86: reference to unresolved using declaration
 - [NOTE] src/third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] src/third_party/libc++/src/include/__memory_resource/polymorphic_allocator.h:90: reference to unresolved using declaration
 - [NOTE] src/third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [ERROR] src/third_party/libc++/src/include/__memory_resource/polymorphic_allocator.h:90: reference to unresolved using declaration
 - [NOTE] src/third_party/libc++/src/include/__cstddef/max_align_t.h:22: using declaration annotated with 'using_if_exists' here
 - [FATAL] src/base/dcheck_is_on.h:8: 'base/debug/debugging_buildflags.h' file not found

It seems this same issues pops out in Google in different contexts (e.g. here ), I'm not sure it will be possible to resolve it until Chromium updates the LLVM subtree to a newer version, where this is resolved.

[GittyHarsha]

Yes, I was wondering how come clangd that is custom checked out in build system of chromium work, because it uses the same compilation database file and clang-cl driver. Nice to know even that is failing. How de we even use clangd now for autocomplete and other features!?
This needs to be fixed