Youcompleteme: Unable to build on macOS with Xcode 12: architecture not supported when building watchdog

[sillybun]

Issue Prelude

Please complete these steps and check these boxes (by putting an x inside
the brackets) _before_ filing your issue:

• [x] I have read and understood YCM's CONTRIBUTING document.
• [x] I have read and understood YCM's CODE_OF_CONDUCT document.
• [x] I have read and understood YCM's README, especially the
  Frequently Asked Questions section.
• [x] I have searched YCM's issue tracker to find issues similar to the one I'm
  about to report and couldn't find an answer to my problem. (Example Google
  search.)
• [x] If filing a bug report, I have included the output of vim --version.
• [x] If filing a bug report, I have included the output of :YcmDebugInfo.
• [x] If filing a bug report, I have attached the contents of the logfiles using
  the :YcmToggleLogs command.
• [x] If filing a bug report, I have included which OS (including specific OS
  version) I am using.
• [x] If filing a bug report, I have included a minimal test case that reproduces
  my issue, using vim -Nu /path/to/YCM/vimrc_ycm_minimal, including what I
  expected to happen and what actually happened.
• [x] If filing a installation failure report, I have included the entire output
  of install.py (or cmake/make/ninja) including its invocation
• [x] I understand this is an open-source project staffed by volunteers and
  that any help I receive is a selfless, heartfelt _gift_ of their free time. I
  know I am not entitled to anything and will be polite and courteous.
• [x] I understand my issue may be closed if it becomes obvious I didn't
  actually perform all of these steps.

Thank you for adhering to this process! It ensures your issue is resolved
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Issue Details

Provide a clear description of the problem, including the following key
questions:

• What did you do?

Include steps to reproduce here.

1. Clone project. Including recursive dependencies (done via vim-plug).
2. Run /usr/bin/python3 install.py

• What did you expect to happen?

YCM should compile cleanly, as it did before.

• What actually happened?

Build error. See below for a full log.

Diagnostic data

Output of vim --version

VIM - Vi IMproved 8.2 (2019 Dec 12, compiled Sep 21 2020 04:03:24)
macOS version
包含补丁: 1-1719
编译者 [email protected]
巨型版本 带 MacVim 图形界面。  可使用(+)与不可使用(-)的功能:
+acl               +file_in_path      -mouse_sysmouse    -tag_old_static
+arabic            +find_in_path      +mouse_urxvt       -tag_any_white
+autocmd           +float             +mouse_xterm       -tcl
+autochdir         +folding           +multi_byte        +termguicolors
-autoservername    -footer            +multi_lang        +terminal
+balloon_eval      +fork()            -mzscheme          +terminfo
+balloon_eval_term +fullscreen        +netbeans_intg     +termresponse
+browse            +gettext           +num64             +textobjects
++builtin_terms    -hangul_input      +odbeditor         +textprop
+byte_offset       +iconv             +packages          +timers
+channel           +insert_expand     +path_extra        +title
+cindent           +ipv6              +perl/dyn          +toolbar
+clientserver      +job               +persistent_undo   +transparency
+clipboard         +jumplist          +popupwin          +user_commands
+cmdline_compl     +keymap            +postscript        +vartabs
+cmdline_hist      +lambda            +printer           +vertsplit
+cmdline_info      +langmap           +profile           +virtualedit
+comments          +libcall           +python/dyn        +visual
+conceal           +linebreak         +python3/dyn       +visualextra
+cryptv            +lispindent        +quickfix          +viminfo
+cscope            +listcmds          +reltime           +vreplace
+cursorbind        +localmap          +rightleft         +wildignore
+cursorshape       +lua/dyn           +ruby/dyn          +wildmenu
+dialog_con_gui    +menu              +scrollbind        +windows
+diff              +mksession         +signs             +writebackup
+digraphs          +modify_fname      +smartindent       -X11
+dnd               +mouse             -sound             -xfontset
-ebcdic            +mouseshape        +spell             +xim
+emacs_tags        +mouse_dec         +startuptime       -xpm
+eval              -mouse_gpm         +statusline        -xsmp
+ex_extra          -mouse_jsbterm     -sun_workshop      -xterm_clipboard
+extra_search      +mouse_netterm     +syntax            -xterm_save
-farsi             +mouse_sgr         +tag_binary
     系统 vimrc 文件: "$VIM/vimrc"
     用户 vimrc 文件: "$HOME/.vimrc"
 第二用户 vimrc 文件: "~/.vim/vimrc"
      用户 exrc 文件: "$HOME/.exrc"
    系统 gvimrc 文件: "$VIM/gvimrc"
    用户 gvimrc 文件: "$HOME/.gvimrc"
第二用户 gvimrc 文件: "~/.vim/gvimrc"
       defaults file: "$VIMRUNTIME/defaults.vim"
        系统菜单文件: "$VIMRUNTIME/menu.vim"
         $VIM 预设值: "/Applications/MacVim.app/Contents/Resources/vim"
编译方式: clang -c -I. -Iproto -DHAVE_CONFIG_H -DFEAT_GUI_MACVIM -Wall -Wno-unknown-pragmas -pipe  -DMACOS_X -DMACOS_X_DARWIN  -g -O2 -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 -Wall -Wextra -Wshadow -Werror -Wno-error=missing-field-initializers -Wno-error=deprecated-declarations -Wno-error=unused-function
链接方式: clang   -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/[email protected]/lib -L/usr/local/opt/readline/lib -L. -fstack-protector-strong -L/usr/local/lib -L/usr/local/opt/libyaml/lib -L/usr/local/opt/[email protected]/lib -L/usr/local/opt/readline/lib  -L/usr/local/lib -o Vim -framework Cocoa -framework Carbon       -lm  -lncurses -liconv /usr/local/lib/libintl.a -framework AppKit   -fstack-protector  -L/System/Library/Perl/5.18/darwin-thread-multi-2level/CORE

OS version, distribution, etc.

macOS Catalina 10.15.7 (19H2)
XCode Version 12.0.1 (12A7300)
Apple clang version 12.0.0 (clang-1200.0.32.2)
Python 3.8.2

Output of build/install commands

Searching Python 3.8 libraries...
Found Python library: /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/config-3.8-darwin/libpython3.8.dylib
Found Python headers folder: /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/Headers
-- The C compiler identification is AppleClang 12.0.0.12000032
-- The CXX compiler identification is AppleClang 12.0.0.12000032
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PythonLibs: /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/config-3.8-darwin/libpython3.8.dylib (found suitable version "3.8.2", minimum required is "3.5")
-- NOT using libclang, no semantic completion for C/C++/ObjC will be available
-- NOT using clang-tidy for static analysis.
-- Configuring done
-- Generating done
-- Build files have been written to: /private/var/folders/vj/41k8jvts4kv_0mv6hs2x_1rh0000gn/T/ycm_build_b_w6bct_
Scanning dependencies of target BoostParts
[  3%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/codecvt_error_category.cpp.o
[ 14%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/directory.cpp.o
[ 14%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/exception.cpp.o
[ 18%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/path.cpp.o
[ 18%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/operations.cpp.o
[ 22%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/utf8_codecvt_facet.cpp.o
[ 25%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/path_traits.cpp.o
[ 29%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/portability.cpp.o
[ 33%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/windows_file_codecvt.cpp.o
[ 37%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/unique_path.cpp.o
[ 40%] Linking CXX static library libBoostParts.a
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libBoostParts.a(windows_file_codecvt.cpp.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libBoostParts.a(windows_file_codecvt.cpp.o) has no symbols
[ 40%] Built target BoostParts
Scanning dependencies of target ycm_core
[ 44%] Building CXX object ycm/CMakeFiles/ycm_core.dir/Candidate.cpp.o
[ 51%] Building CXX object ycm/CMakeFiles/ycm_core.dir/CodePoint.cpp.o
[ 51%] Building CXX object ycm/CMakeFiles/ycm_core.dir/CharacterRepository.cpp.o
[ 59%] Building CXX object ycm/CMakeFiles/ycm_core.dir/CandidateRepository.cpp.o
[ 59%] Building CXX object ycm/CMakeFiles/ycm_core.dir/Character.cpp.o
[ 62%] Building CXX object ycm/CMakeFiles/ycm_core.dir/CodePointRepository.cpp.o
[ 66%] Building CXX object ycm/CMakeFiles/ycm_core.dir/IdentifierDatabase.cpp.o
[ 70%] Building CXX object ycm/CMakeFiles/ycm_core.dir/IdentifierCompleter.cpp.o
[ 74%] Building CXX object ycm/CMakeFiles/ycm_core.dir/IdentifierUtils.cpp.o
[ 77%] Building CXX object ycm/CMakeFiles/ycm_core.dir/PythonSupport.cpp.o
[ 85%] Building CXX object ycm/CMakeFiles/ycm_core.dir/Utils.cpp.o
[ 85%] Building CXX object ycm/CMakeFiles/ycm_core.dir/Result.cpp.o
[ 92%] Building CXX object ycm/CMakeFiles/ycm_core.dir/Word.cpp.o
[ 92%] Building CXX object ycm/CMakeFiles/ycm_core.dir/versioning.cpp.o
[ 96%] Building CXX object ycm/CMakeFiles/ycm_core.dir/ycm_core.cpp.o
[100%] Linking CXX shared library /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/ycm_core.so
[100%] Built target ycm_core
-- The C compiler identification is AppleClang 12.0.0.12000032
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Found PythonLibs: /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/config-3.8-darwin/libpython3.8.dylib (found version "3.8.2")
-- Configuring done
-- Generating done
-- Build files have been written to: /private/var/folders/vj/41k8jvts4kv_0mv6hs2x_1rh0000gn/T/regex_build_ndg9vi32
Scanning dependencies of target _regex
[ 66%] Building C object CMakeFiles/_regex.dir/regex_3/_regex_unicode.c.o
[ 66%] Building C object CMakeFiles/_regex.dir/regex_3/_regex.c.o
[100%] Linking C shared library /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/cregex/regex_3/_regex.so
[100%] Built target _regex
running build
running build_py
creating /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3
creating /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog
copying src/watchdog/watchmedo.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog
copying src/watchdog/version.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog
copying src/watchdog/events.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog
copying src/watchdog/__init__.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog
creating /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/utils
copying src/watchdog/utils/unicode_paths.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/utils
copying src/watchdog/utils/compat.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/utils
copying src/watchdog/utils/win32stat.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/utils
copying src/watchdog/utils/__init__.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/utils
copying src/watchdog/utils/dirsnapshot.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/utils
copying src/watchdog/utils/delayed_queue.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/utils
copying src/watchdog/utils/platform.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/utils
copying src/watchdog/utils/bricks.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/utils
copying src/watchdog/utils/echo.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/utils
creating /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
copying src/watchdog/observers/fsevents.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
copying src/watchdog/observers/inotify.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
copying src/watchdog/observers/__init__.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
copying src/watchdog/observers/api.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
copying src/watchdog/observers/inotify_buffer.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
copying src/watchdog/observers/winapi.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
copying src/watchdog/observers/read_directory_changes.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
copying src/watchdog/observers/kqueue.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
copying src/watchdog/observers/inotify_c.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
copying src/watchdog/observers/polling.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
copying src/watchdog/observers/fsevents2.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/observers
creating /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/tricks
copying src/watchdog/tricks/__init__.py -> /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/lib3/watchdog/tricks
running egg_info
writing src/watchdog.egg-info/PKG-INFO
writing dependency_links to src/watchdog.egg-info/dependency_links.txt
writing entry points to src/watchdog.egg-info/entry_points.txt
writing requirements to src/watchdog.egg-info/requires.txt
writing top-level names to src/watchdog.egg-info/top_level.txt
reading manifest file 'src/watchdog.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
warning: no files found matching '*.h' under directory 'src'
writing manifest file 'src/watchdog.egg-info/SOURCES.txt'
running build_ext
building '_watchdog_fsevents' extension
creating /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/3
creating /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/3/temp.macosx-10.14.6-x86_64-3.8
creating /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/3/temp.macosx-10.14.6-x86_64-3.8/src
xcrun -sdk macosx clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -iwithsysroot/System/Library/Frameworks/System.framework/PrivateHeaders -iwithsysroot/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/Headers -arch arm64 -arch x86_64 -DWATCHDOG_VERSION_STRING="0.10.2" -DWATCHDOG_VERSION_MAJOR=0 -DWATCHDOG_VERSION_MINOR=10 -DWATCHDOG_VERSION_BUILD=2 -I/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8 -c src/watchdog_fsevents.c -o /Users/zhangyiteng/.vim/plugged/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/3/temp.macosx-10.14.6-x86_64-3.8/src/watchdog_fsevents.o -std=c99 -pedantic -Wall -Wextra -fPIC -Wno-nullability-completeness -Wno-nullability-extension -Wno-newline-eof -Wno-error=unused-command-line-argument
In file included from src/watchdog_fsevents.c:22:
In file included from /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8/Python.h:11:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/12.0.0/include/limits.h:21:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/limits.h:63:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/cdefs.h:807:2: error: Unsupported architecture
#error Unsupported architecture
 ^
In file included from src/watchdog_fsevents.c:22:
In file included from /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8/Python.h:11:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/12.0.0/include/limits.h:21:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/limits.h:64:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/machine/limits.h:8:2: error: architecture not supported
#error architecture not supported
 ^
In file included from src/watchdog_fsevents.c:22:
In file included from /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8/Python.h:25:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/stdio.h:64:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/_stdio.h:71:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/_types.h:27:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:33:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/machine/_types.h:34:2: error: architecture not supported
#error architecture not supported
 ^
In file included from src/watchdog_fsevents.c:22:
In file included from /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8/Python.h:25:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/stdio.h:64:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/_stdio.h:71:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/_types.h:27:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:55:9: error: unknown type name '__int64_t'
typedef __int64_t       __darwin_blkcnt_t;      /* total blocks */
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:56:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_blksize_t;     /* preferred block size */
        ^
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:57:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_dev_t;         /* dev_t */
        ^
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:60:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_gid_t;         /* [???] process and group IDs */
        ^
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:61:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_id_t;          /* [XSI] pid_t, uid_t, or gid_t*/
        ^
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:62:9: error: unknown type name '__uint64_t'
typedef __uint64_t      __darwin_ino64_t;       /* [???] Used for 64 bit inodes */
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:68:9: error: unknown type name '__darwin_natural_t'
typedef __darwin_natural_t __darwin_mach_port_name_t; /* Used by mach */
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:70:9: error: unknown type name '__uint16_t'; did you mean '__uint128_t'?
typedef __uint16_t      __darwin_mode_t;        /* [???] Some file attributes */
        ^
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:71:9: error: unknown type name '__int64_t'
typedef __int64_t       __darwin_off_t;         /* [???] Used for file sizes */
        ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:72:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_pid_t;         /* [???] process and group IDs */
        ^
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:73:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_sigset_t;      /* [???] signal set */
        ^
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:74:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_suseconds_t;   /* [???] microseconds */
        ^
note: '__int128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:75:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_uid_t;         /* [???] user IDs */
        ^
note: '__uint128_t' declared here
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types.h:76:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_useconds_t;    /* [???] microseconds */
        ^
note: '__uint128_t' declared here
In file included from src/watchdog_fsevents.c:22:
In file included from /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8/Python.h:25:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/stdio.h:64:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/_stdio.h:71:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/_types.h:43:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_wctype_t;
        ^
note: '__uint128_t' declared here
In file included from src/watchdog_fsevents.c:22:
In file included from /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8/Python.h:25:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/stdio.h:64:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/_stdio.h:75:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/_types/_va_list.h:31:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/machine/types.h:37:2: error: architecture not supported
#error architecture not supported
 ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
error: command 'xcrun' failed with exit status 1
Failed to build watchdog module.

[puremourning]

When did this start happeneing ? was it immediately after installing 10.15.7 ?

You need to help us repro/unsdersand this issue as watchdog has been successfully building on Mac for ages and works in our CI. This suggests it's a unique problem in your environment. or something that's broken with an Xcode upgrade.

[sillybun]

yes, last month, I successfully built ycm on macOS. Do you have any suggestions about how can I solve the problem?

[sillybun]

and my python version is: Python 3.8.2

[puremourning]

Did you recently upgrade Xcode? What other things have you recently done on your system that might affect this.

This error is coming from your system headers and clearly nothing to do with YCM code. It's actually the watchdog python module that's filling to build.

[puremourning]

Ah could be an Xcode-12 things ? https://developer.apple.com/documentation/xcode/building_a_universal_macos_binary

seems xcodebuild is trying to build an arm target pointlessly for watchdog.

[puremourning]

I'm going to update to Xcode 12 and see if I can repro.

You may be able to make it work by using the command line tools, rather than Xcode (see man pages for xcode-select)

[puremourning]

I can't repro.

[bstaletic]

A workaround would be temporarily getting rid of setup tools, so that watchdog doesn't get compiled.

YCM still needs a working watchdog, but it should use a different API.

The downside is worse watchdog performance.

[sillybun]

I have solved the problem by using python3 downloaded from the official website instead of python from brew.

[sillybun]

@puremourning @bstaletic thanks for your kind help

[ddeville]

Getting the same errors here after updating to Xcode 12. Also tried switching to the command line tools but same issue (which is not surprising since it’s using the same SDK and project settings anyway).

As noted above, this line implies that an arm64 slice is being built here:

xcrun -sdk macosx clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -iwithsysroot/System/Library/Frameworks/System.framework/PrivateHeaders -iwithsysroot/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/Headers -arch arm64 -arch x86_64 -DWATCHDOG_VERSION_STRING="0.10.2" -DWATCHDOG_VERSION_MAJOR=0 -DWATCHDOG_VERSION_MINOR=10 -DWATCHDOG_VERSION_BUILD=2 -I/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8 -c src/watchdog_fsevents.c -o /Users/damien/.vim-plug-plugins/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/3/temp.macosx-10.14.6-x86_64-3.8/src/watchdog_fsevents.o -std=c99 -pedantic -Wall -Wextra -fPIC -Wno-nullability-completeness -Wno-nullability-extension -Wno-newline-eof -Wno-error=unused-command-line-argument

Looks like the setup script for Watchdog FSEvents potentially needs to be altered.
They have an opened issue for this same issue but there doesn’t seem to be much activity on the repo in the last few months.

[puremourning]

@ddeville thanks for the info. Now I’m confused why I can’t reproduce. I’ll try harder.

[ddeville]

Hey @puremourning I’ve added more info in https://github.com/gorakhargosh/watchdog/issues/689.

I believe the problem happens when using the Python (3.8.2) that ships with Xcode. /usr/bin/python is a simple trampoline to this version. I think Apple’s fork might be setting up the archs to support arm64 in a way that messes up with some extensions.
The workaround here is to install the latest Python version from python.org (or brew or pyenv or whatever).

[puremourning]

Thanks

So this is a Xcode python bug and the solution is to ask Apple to fix it or use upstream or homebrew python.

[rwmitchell]

I'm having the exact same issue, that's how I got here.

I'm in the processes of migrating to a newer MBP with 10.15.7. Installed python 3.9 from python.org, creating a symlink to it in /usr/local/bin. Once I got rid of an PYTHONPATH variable, everything seemed to finally work....until this. Just like the OP, I'm getting
```xcrun -sdk macosx clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -iwithsysroot/System/Library/Frameworks/System.framework/PrivateHeaders -iwithsysroot/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/Headers -arch arm64 -arch x86_64 -DWATCHDOG_VERSION_STRING="0.10.2" -DWATCHDOG_VERSION_MAJOR=0 -DWATCHDOG_VERSION_MINOR=10 -DWATCHDOG_VERSION_BUILD=2 -I/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8 -c src/watchdog_fsevents.c -o /Users/rwmitch1/.vim/bundle/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/3/temp.macosx-10.14.6-x86_64-3.8/src/watchdog_fsevents.o -std=c99 -pedantic -Wall -Wextra -fPIC -Wno-nullability-completeness -Wno-nullability-extension -Wno-newline-eof -Wno-error=unused-command-line-argument
In file included from src/watchdog_fsevents.c:22:
In file included from /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8/Python.h:11:
In file included from /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/12.0.0/include/limits.h:21:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/limits.h:63:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include/sys/cdefs.h:807:2: error: Unsupported architecture

error Unsupported architecture

```

Did I miss reading the solution??

[lockerfish]

I experienced this issue with NeoVim and UltiSnips. Solved by running the following commands:

:echo has('python3') returned 0 even though python3 -m pip install --user --upgrade pynvim didn't show errors.

brew upgrade python3 showed I was in the latest version

running brew link --overwrite [email protected] fixed the issue for me.

:echo has('python3') returned 1 now and UltiSnips did not break with errors.

Writing it here to hopefully help someone running into the same issue.

[rwmitchell]

I don't do brew, wonder what that actually changed?

By changing the xcrun command by removing arm64 to:

xcrun -sdk macosx clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -iwithsysroot/System/Library/Frameworks/System.framework/PrivateHeaders -iwithsysroot/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/Headers -arch x86_64 -DWATCHDOG_VERSION_STRING="10.2" -DWATCHDOG_VERSION_MAJOR=0 -DWATCHDOG_VERSION_MINOR=10 -DWATCHDOG_VERSION_BUILD=2 -I/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/include/python3.8 -c src/watchdog_fsevents.c -o /Users/foo/.vim/bundle/YouCompleteMe/third_party/ycmd/third_party/watchdog_deps/watchdog/build/3/temp.macosx-10.14.6-x86_64-3.8/src/watchdog_fsevents.o -std=c99 -pedantic -Wall -Wextra -fPIC -Wno-nullability-completeness -Wno-nullability-extension -Wno-newline-eof -Wno-error=unused-command-line-argument

that command completes without any errors, but the original command gets rerun when doing:
python3 ./install.py --clang-completer in the YouCompleteMe git directory. and I don't see what is generating it.

Certainly that brew command is just changing a symlink somewhere?

[ddeville]

I think this command is actually run by Python itself and the fact that it includes the arm64 slices makes me think that it's using Apple system's Python.

Can you check your path (and/or do which python3) and make sure that it's in fact picking the one you've installed from python.org and symlinked in /usr/local/bin?

[rwmitchell]

I have my own script to show all locations of an executable in my path with the current one highlighted in green. I suspected the coloring fill fail here, so i tried including an image above. anyway, where are both:

```❯ lb python
l 9 2020-10-15 09:29:58 /Library/Frameworks/Python.framework/Versions/3.9/bin/python
l 75 2019-12-05 06:24:41 /usr/bin/python
l 61 2020-10-15 10:47:58 /usr/local/bin/python

❯ which python
/usr/local/bin/python

❯ python --version
Python 3.9.0
```

and it still fails.

[rwmitchell]

I should have paid more attention to your question:

sigh So focused on python, overlooked what python3 was doing. Fixed pathing to find 3.9 first and all is better.