gem: remove copyright-header to bypass charlock_holmes build failure by Watson1978 · Pull Request #430 · fluent-plugins-nursery/fluent-plugin-kubernetes_metadata_filter

Watson1978 · 2026-06-26T04:48:12Z

charlock_holmes (0.7.9) fails to build its native extension on environments with GCC 16.1.1 and ICU 78 due to C++ compatibility issues.

Since copyright-header is a development utility used for inserting copyright notices into source files, removing it has no impact on the core functionality of the application.

This change unblocks bundle update on modern environments by removing the dependency chain: copyright-header -> github-linguist -> charlock_holmes.

$ bundle install
Fetching gem metadata from https://rubygems.org/.........
Local specification for fluentd-1.19.0 has different dependencies than the remote gem, ignoring it
Resolving dependencies...
WARN: Unresolved or ambiguous specs during Gem::Specification.reset:
      psych (>= 4.0.0)
      Available/installed versions of this gem:
      - 5.4.0
      - 5.3.1
      - 5.2.6
WARN: Clearing out unresolved specs. Try 'gem cleanup <gem>'
Please report a bug if this causes problems.
Installing charlock_holmes 0.7.9 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /home/watson/.rbenv/versions/4.0.5/lib/ruby/gems/4.0.0/gems/charlock_holmes-0.7.9/ext/charlock_holmes
/home/watson/.rbenv/versions/4.0.5/bin/ruby extconf.rb
checking for pkg-config for icu-i18n... [" ", "", "-licui18n"]
checking for pkg-config for icu-io... [" ", "", "-licuio"]
checking for pkg-config for icu-uc... [" ", "", "-licuuc"]
checking for -licui18n... yes
checking for unicode/ucnv.h... yes
checking for -lz... yes
checking for -licuuc... yes
checking for -licudata... yes
checking for icu that requires explicit C++ version flag... no
Static linking is disabled.
creating Makefile

current directory: /home/watson/.rbenv/versions/4.0.5/lib/ruby/gems/4.0.0/gems/charlock_holmes-0.7.9/ext/charlock_holmes
make -j3 DESTDIR\= sitearchdir\=./.gem.20260626-160800-gxh8bu sitelibdir\=./.gem.20260626-160800-gxh8bu clean
make: warning: -j3 forced in submake: resetting jobserver mode.

current directory: /home/watson/.rbenv/versions/4.0.5/lib/ruby/gems/4.0.0/gems/charlock_holmes-0.7.9/ext/charlock_holmes
make -j3 DESTDIR\= sitearchdir\=./.gem.20260626-160800-gxh8bu sitelibdir\=./.gem.20260626-160800-gxh8bu
make: warning: -j3 forced in submake: resetting jobserver mode.
compiling converter.c
compiling encoding_detector.c
compiling ext.c
compiling transliterator.cpp
In file included from /usr/include/unicode/unistr.h:37,
                 from /usr/include/unicode/translit.h:27,
                 from transliterator.cpp:5:
/usr/include/unicode/char16ptr.h:271:38: error: 'enable_if_t' in namespace 'std' does not name a template type
  271 | template<typename T, typename = std::enable_if_t<std::is_same_v<T, UChar>>>
      |                                      ^~~~~~~~~~~
/usr/include/unicode/char16ptr.h:271:33: note: 'std::enable_if_t' is only available from C++14 onwards
  271 | template<typename T, typename = std::enable_if_t<std::is_same_v<T, UChar>>>
      |                                 ^~~
/usr/include/unicode/char16ptr.h:271:49: error: expected '>' before '<' token
  271 | template<typename T, typename = std::enable_if_t<std::is_same_v<T, UChar>>>
      |                                                 ^
/usr/include/unicode/char16ptr.h: In function 'const char16_t* icu_78::uprv_char16PtrFromUChar(const T*)':
/usr/include/unicode/char16ptr.h:273:24: error: 'is_same_v' is not a member of 'std'; did you mean 'is_same'? [-Wtemplate-body]
  273 |     if constexpr (std::is_same_v<UChar, char16_t>) {
      |                        ^~~~~~~~~
      |                        is_same
/usr/include/unicode/char16ptr.h:273:39: error: expected primary-expression before ',' token [-Wtemplate-body]
  273 |     if constexpr (std::is_same_v<UChar, char16_t>) {
      |                                       ^
/usr/include/unicode/char16ptr.h:273:41: error: expected primary-expression before 'char16_t' [-Wtemplate-body]
  273 |     if constexpr (std::is_same_v<UChar, char16_t>) {
      |                                         ^~~~~~~~
/usr/include/unicode/char16ptr.h:273:40: error: expected ')' before 'char16_t' [-Wtemplate-body]
  273 |     if constexpr (std::is_same_v<UChar, char16_t>) {
      |                  ~                     ^~~~~~~~~
      |                                        )
/usr/include/unicode/char16ptr.h: At global scope:
/usr/include/unicode/char16ptr.h:386:10: error: 'is_convertible_v' is not a member of 'std'; did you mean 'is_convertible'?
  386 |     std::is_convertible_v<T, std::u16string_view>
      |          ^~~~~~~~~~~~~~~~
      |          is_convertible
/usr/include/unicode/char16ptr.h:386:28: error: expected primary-expression before ',' token
  386 |     std::is_convertible_v<T, std::u16string_view>
      |                            ^
/usr/include/unicode/char16ptr.h:400:13: error: 'u16string_view' in namespace 'std' does not name a type; did you mean 'u16string'?
  400 | inline std::u16string_view toU16StringView(std::u16string_view sv) { return sv; }
      |             ^~~~~~~~~~~~~~
      |             u16string
/usr/include/unicode/char16ptr.h:408:13: error: 'u16string_view' in namespace 'std' does not name a type; did you mean 'u16string'?
  408 | inline std::u16string_view toU16StringView(std::basic_string_view<uint16_t> sv) {
      |             ^~~~~~~~~~~~~~
      |             u16string
/usr/include/unicode/char16ptr.h:429:36: error: 'enable_if_t' in namespace 'std' does not name a template type
  429 |           typename = typename std::enable_if_t<!std::is_pointer_v<std::remove_reference_t<T>>>>
      |                                    ^~~~~~~~~~~
/usr/include/unicode/char16ptr.h:429:36: note: 'std::enable_if_t' is only available from C++14 onwards
/usr/include/unicode/char16ptr.h:429:47: error: expected '>' before '<' token
  429 |           typename = typename std::enable_if_t<!std::is_pointer_v<std::remove_reference_t<T>>>>
      |                                               ^
/usr/include/unicode/char16ptr.h:430:13: error: 'u16string_view' in namespace 'std' does not name a type; did you mean 'u16string'?
  430 | inline std::u16string_view toU16StringViewNullable(const T& text) {
      |             ^~~~~~~~~~~~~~
      |             u16string
/usr/include/unicode/char16ptr.h:439:36: error: 'enable_if_t' in namespace 'std' does not name a template type
  439 |           typename = typename std::enable_if_t<std::is_pointer_v<std::remove_reference_t<T>>>,
      |                                    ^~~~~~~~~~~
/usr/include/unicode/char16ptr.h:439:36: note: 'std::enable_if_t' is only available from C++14 onwards
/usr/include/unicode/char16ptr.h:439:47: error: expected '>' before '<' token
  439 |           typename = typename std::enable_if_t<std::is_pointer_v<std::remove_reference_t<T>>>,
      |                                               ^
/usr/include/unicode/char16ptr.h:441:13: error: 'u16string_view' in namespace 'std' does not name a type; did you mean 'u16string'?
  441 | inline std::u16string_view toU16StringViewNullable(const T& text) {
      |             ^~~~~~~~~~~~~~
      |             u16string
In file included from /usr/include/unicode/unistr.h:40:
/usr/include/unicode/stringpiece.h:134:29: error: 'enable_if_t' in namespace 'std' does not name a template type
  134 |             typename = std::enable_if_t<
      |                             ^~~~~~~~~~~
/usr/include/unicode/stringpiece.h:134:24: note: 'std::enable_if_t' is only available from C++14 onwards
  134 |             typename = std::enable_if_t<
      |                        ^~~
/usr/include/unicode/stringpiece.h:134:40: error: expected '>' before '<' token
  134 |             typename = std::enable_if_t<
      |                                        ^
/usr/include/unicode/stringpiece.h:185:19: error: expected type-specifier
  185 |   inline operator std::string_view() const {
      |                   ^~~
In file included from /usr/include/unicode/unistr.h:41:
/usr/include/unicode/bytestream.h: In member function 'virtual void icu_78::StringByteSink<StringClass>::Append(const char*, int32_t)':
/usr/include/unicode/bytestream.h:320:24: error: 'is_same_v' is not a member of 'std'; did you mean 'is_same'? [-Wtemplate-body]
  320 |     if constexpr (std::is_same_v<Unit, char>) {
      |                        ^~~~~~~~~
      |                        is_same
/usr/include/unicode/bytestream.h:320:38: error: expected primary-expression before ',' token [-Wtemplate-body]
  320 |     if constexpr (std::is_same_v<Unit, char>) {
      |                                      ^
/usr/include/unicode/bytestream.h:320:40: error: expected primary-expression before 'char' [-Wtemplate-body]
  320 |     if constexpr (std::is_same_v<Unit, char>) {
      |                                        ^~~~
/usr/include/unicode/bytestream.h:320:40: error: expected ')' before 'char' [-Wtemplate-body]
/usr/include/unicode/bytestream.h:320:18: note: to match this '('
  320 |     if constexpr (std::is_same_v<Unit, char>) {
      |                  ^
/usr/include/unicode/unistr.h: At global scope:
/usr/include/unicode/unistr.h:354:40: error: 'enable_if_t' in namespace 'std' does not name a template type
  354 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                        ^~~~~~~~~~~
/usr/include/unicode/unistr.h:354:35: note: 'std::enable_if_t' is only available from C++14 onwards
  354 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                   ^~~
/usr/include/unicode/unistr.h:354:51: error: expected '>' before '<' token
  354 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                                   ^
/usr/include/unicode/unistr.h:387:40: error: 'enable_if_t' in namespace 'std' does not name a template type
  387 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                        ^~~~~~~~~~~
/usr/include/unicode/unistr.h:387:35: note: 'std::enable_if_t' is only available from C++14 onwards
  387 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                   ^~~
/usr/include/unicode/unistr.h:387:51: error: expected '>' before '<' token
  387 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                                   ^
/usr/include/unicode/unistr.h:1928:37: error: 'u16string_view' in namespace 'std' does not name a type; did you mean 'u16string'?
 1928 |   using unspecified_iterator = std::u16string_view::const_iterator;
      |                                     ^~~~~~~~~~~~~~
      |                                     u16string
/usr/include/unicode/unistr.h:1929:45: error: 'u16string_view' in namespace 'std' does not name a type; did you mean 'u16string'?
 1929 |   using unspecified_reverse_iterator = std::u16string_view::const_reverse_iterator;
      |                                             ^~~~~~~~~~~~~~
      |                                             u16string
/usr/include/unicode/unistr.h:1937:3: error: 'unspecified_iterator' does not name a type
 1937 |   unspecified_iterator begin() const { return std::u16string_view(*this).begin(); }
      |   ^~~~~~~~~~~~~~~~~~~~
/usr/include/unicode/unistr.h:1943:3: error: 'unspecified_iterator' does not name a type
 1943 |   unspecified_iterator end() const { return std::u16string_view(*this).end(); }
      |   ^~~~~~~~~~~~~~~~~~~~
/usr/include/unicode/unistr.h:1949:3: error: 'unspecified_reverse_iterator' does not name a type
 1949 |   unspecified_reverse_iterator rbegin() const { return std::u16string_view(*this).rbegin(); }
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/unicode/unistr.h:1955:3: error: 'unspecified_reverse_iterator' does not name a type
 1955 |   unspecified_reverse_iterator rend() const { return std::u16string_view(*this).rend(); }
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/unicode/unistr.h:2021:40: error: 'enable_if_t' in namespace 'std' does not name a template type
 2021 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                        ^~~~~~~~~~~
/usr/include/unicode/unistr.h:2021:35: note: 'std::enable_if_t' is only available from C++14 onwards
 2021 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                   ^~~
/usr/include/unicode/unistr.h:2021:51: error: expected '>' before '<' token
 2021 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                                   ^
/usr/include/unicode/unistr.h:2286:40: error: 'enable_if_t' in namespace 'std' does not name a template type
 2286 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                        ^~~~~~~~~~~
/usr/include/unicode/unistr.h:2286:35: note: 'std::enable_if_t' is only available from C++14 onwards
 2286 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                   ^~~
/usr/include/unicode/unistr.h:2286:51: error: expected '>' before '<' token
 2286 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                                   ^
/usr/include/unicode/unistr.h:2357:40: error: 'enable_if_t' in namespace 'std' does not name a template type
 2357 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                        ^~~~~~~~~~~
/usr/include/unicode/unistr.h:2357:35: note: 'std::enable_if_t' is only available from C++14 onwards
 2357 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                   ^~~
/usr/include/unicode/unistr.h:2357:51: error: expected '>' before '<' token
 2357 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                                   ^
/usr/include/unicode/unistr.h:3101:19: error: expected type-specifier
 3101 |   inline operator std::u16string_view() const {
      |                   ^~~
/usr/include/unicode/unistr.h:3337:40: error: 'enable_if_t' in namespace 'std' does not name a template type
 3337 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                        ^~~~~~~~~~~
/usr/include/unicode/unistr.h:3337:35: note: 'std::enable_if_t' is only available from C++14 onwards
 3337 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                   ^~~
/usr/include/unicode/unistr.h:3337:51: error: expected '>' before '<' token
 3337 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                                   ^
/usr/include/unicode/unistr.h:3661:40: error: 'enable_if_t' in namespace 'std' does not name a template type
 3661 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                        ^~~~~~~~~~~
/usr/include/unicode/unistr.h:3661:35: note: 'std::enable_if_t' is only available from C++14 onwards
 3661 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                   ^~~
/usr/include/unicode/unistr.h:3661:51: error: expected '>' before '<' token
 3661 |   template<typename S, typename = std::enable_if_t<ConvertibleToU16StringView<S>>>
      |                                                   ^
/usr/include/unicode/unistr.h:3816:60: error: 'std::u16string_view' has not been declared; did you mean 'std::u16string'?
 3816 |   static UnicodeString readOnlyAliasFromU16StringView(std::u16string_view text);
      |                                                            ^~~~~~~~~~~~~~
/usr/include/unicode/unistr.h:3932:64: error: 'std::u16string_view' has not been declared; did you mean 'std::u16string'?
 3932 |   UnicodeString& doReplace(int32_t start, int32_t length, std::u16string_view src);
      |                                                                ^~~~~~~~~~~~~~
/usr/include/unicode/unistr.h:3936:32: error: 'std::u16string_view' has not been declared; did you mean 'std::u16string'?
 3936 |   UnicodeString& doAppend(std::u16string_view src);
      |                                ^~~~~~~~~~~~~~
/usr/include/unicode/unistr.h: In member function 'bool icu_78::UnicodeString::operator==(const S&) const':
/usr/include/unicode/unistr.h:356:10: error: 'u16string_view' is not a member of 'std'; did you mean 'u16string'? [-Wtemplate-body]
  356 |     std::u16string_view sv(internal::toU16StringView(text));
      |          ^~~~~~~~~~~~~~
      |          u16string
/usr/include/unicode/unistr.h:358:46: error: 'sv' was not declared in this scope [-Wtemplate-body]
  358 |     return !isBogus() && (len = length()) == sv.length() && doEquals(sv.data(), len);
      |                                              ^~
/usr/include/unicode/unistr.h: In member function 'icu_78::UnicodeString& icu_78::UnicodeString::operator=(const S&)':
/usr/include/unicode/unistr.h:2024:45: error: 'toU16StringView' is not a member of 'icu_78::internal' [-Wtemplate-body]
 2024 |     return doReplace(0, length(), internal::toU16StringView(src));
      |                                             ^~~~~~~~~~~~~~~
/usr/include/unicode/unistr.h: In member function 'icu_78::UnicodeString& icu_78::UnicodeString::operator+=(const S&)':
/usr/include/unicode/unistr.h:2288:31: error: 'toU16StringView' is not a member of 'icu_78::internal' [-Wtemplate-body]
 2288 |     return doAppend(internal::toU16StringView(src));
      |                               ^~~~~~~~~~~~~~~
/usr/include/unicode/unistr.h: In member function 'icu_78::UnicodeString& icu_78::UnicodeString::append(const S&)':
/usr/include/unicode/unistr.h:2359:31: error: 'toU16StringView' is not a member of 'icu_78::internal' [-Wtemplate-body]
 2359 |     return doAppend(internal::toU16StringView(src));
      |                               ^~~~~~~~~~~~~~~
/usr/include/unicode/unistr.h: In constructor 'icu_78::UnicodeString::UnicodeString(const S&)':
/usr/include/unicode/unistr.h:3340:24: error: 'toU16StringViewNullable' is not a member of 'icu_78::internal' [-Wtemplate-body]
 3340 |     doAppend(internal::toU16StringViewNullable(text));
      |                        ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/unicode/unistr.h: In static member function 'static icu_78::UnicodeString icu_78::UnicodeString::readOnlyAlias(const S&)':
/usr/include/unicode/unistr.h:3663:53: error: 'toU16StringView' is not a member of 'icu_78::internal' [-Wtemplate-body]
 3663 |     return readOnlyAliasFromU16StringView(internal::toU16StringView(text));
      |                                                     ^~~~~~~~~~~~~~~
/usr/include/unicode/unistr.h: At global scope:
/usr/include/unicode/unistr.h:4178:21: error: 'enable_if_t' in namespace 'std' does not name a template type
 4178 |     typename = std::enable_if_t<ConvertibleToU16StringView<S> && std::is_same_v<US, UnicodeString>>>
      |                     ^~~~~~~~~~~
/usr/include/unicode/unistr.h:4178:16: note: 'std::enable_if_t' is only available from C++14 onwards
 4178 |     typename = std::enable_if_t<ConvertibleToU16StringView<S> && std::is_same_v<US, UnicodeString>>>
      |                ^~~
/usr/include/unicode/unistr.h:4178:32: error: expected '>' before '<' token
 4178 |     typename = std::enable_if_t<ConvertibleToU16StringView<S> && std::is_same_v<US, UnicodeString>>>
      |                                ^
/usr/include/unicode/unistr.h: In function 'icu_78::UnicodeString icu_78::operator+(const US&, const S&)':
/usr/include/unicode/unistr.h:4180:46: error: 'toU16StringView' is not a member of 'icu_78::internal' [-Wtemplate-body]
 4180 |   return unistr_internalConcat(s1, internal::toU16StringView(s2));
      |                                              ^~~~~~~~~~~~~~~
/usr/include/unicode/unistr.h: At global scope:
/usr/include/unicode/unistr.h:4186:53: error: 'std::u16string_view' has not been declared; did you mean 'std::u16string'?
 4186 | unistr_internalConcat(const UnicodeString &s1, std::u16string_view s2);
      |                                                     ^~~~~~~~~~~~~~
In file included from /usr/include/unicode/uenum.h:25,
                 from /usr/include/unicode/utrans.h:22,
                 from /usr/include/unicode/translit.h:29:
/usr/include/unicode/localpointer.h:559:26: error: parameter declared 'auto'
  559 | template <typename Type, auto closeFunction>
      |                          ^~~~
/usr/include/unicode/localpointer.h:571:76: error: template argument 2 is invalid [-Wtemplate-body]
  571 |     explicit LocalOpenPointer(std::unique_ptr<Type, decltype(closeFunction)> &&p)
      |                                                                            ^
/usr/include/unicode/localpointer.h:581:78: error: template argument 2 is invalid [-Wtemplate-body]
  581 |     LocalOpenPointer &operator=(std::unique_ptr<Type, decltype(closeFunction)> &&p) {
      |                                                                              ^
/usr/include/unicode/localpointer.h:597:59: error: template argument 2 is invalid [-Wtemplate-body]
  597 |     operator std::unique_ptr<Type, decltype(closeFunction)> () && {
      |                                                           ^
/usr/include/unicode/uenum.h:69:1: note: invalid template non-type parameter
   69 | U_DEFINE_LOCAL_OPEN_POINTER(LocalUEnumerationPointer, UEnumeration, uenum_close);
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/unicode/uset.h:362:1: note: invalid template non-type parameter
  362 | U_DEFINE_LOCAL_OPEN_POINTER(LocalUSetPointer, USet, uset_close);
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/unicode/utrans.h:23:
/usr/include/unicode/uset.h:1651:10: error: 'u16string_view' in namespace 'std' does not name a type; did you mean 'u16string'?
 1651 |     std::u16string_view operator*() const {
      |          ^~~~~~~~~~~~~~
      |          u16string
/usr/include/unicode/uset.h: In member function 'std::u16string icu_78::header::USetElementIterator::operator*() const':
/usr/include/unicode/uset.h:1771:44: error: no matching function for call to 'uprv_char16PtrFromUChar(const UChar*&)'
 1771 |             return {uprv_char16PtrFromUChar(uchars), static_cast<size_t>(length)};
      |                     ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
  • there is 1 candidate
    • candidate 1: 'template<class T, class> const char16_t* icu_78::uprv_char16PtrFromUChar(const T*)'
      /usr/include/unicode/char16ptr.h:272:24:
        272 | inline const char16_t *uprv_char16PtrFromUChar(const T *p) {
            |                        ^~~~~~~~~~~~~~~~~~~~~~~
      • template argument deduction/substitution failed:
/usr/include/unicode/uset.h:1771:81: error: could not convert '{<expression error>, ((size_t)length)}' from '<brace-enclosed initializer
list>' to 'std::u16string' {aka 'std::__cxx11::basic_string<char16_t>'}
 1771 |             return {uprv_char16PtrFromUChar(uchars), static_cast<size_t>(length)};
      |                                                                                 ^
      |                                                                                 |
      |                                                                                 <brace-enclosed initializer list>
/usr/include/unicode/utrans.h: At global scope:
/usr/include/unicode/utrans.h:258:1: note: invalid template non-type parameter
  258 | U_DEFINE_LOCAL_OPEN_POINTER(LocalUTransliteratorPointer, UTransliterator, utrans_close);
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~
make: *** [Makefile:243: transliterator.o] Error 1

make failed, exit code 2

Gem files will remain installed in /home/watson/.rbenv/versions/4.0.5/lib/ruby/gems/4.0.0/gems/charlock_holmes-0.7.9 for inspection.
Results logged to /home/watson/.rbenv/versions/4.0.5/lib/ruby/gems/4.0.0/extensions/x86_64-linux/4.0.0/charlock_holmes-0.7.9/gem_make.out

  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/rubygems/ext/builder.rb:141:in 'Gem::Ext::Builder.run'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/rubygems/ext/builder.rb:66:in 'block in Gem::Ext::Builder.make'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/rubygems/ext/builder.rb:58:in 'Array#each'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/rubygems/ext/builder.rb:58:in 'Gem::Ext::Builder.make'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/rubygems/ext/ext_conf_builder.rb:44:in 'Gem::Ext::ExtConfBuilder.build'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/rubygems/ext/builder.rb:220:in 'Gem::Ext::Builder#build_extension'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/rubygems/ext/builder.rb:252:in 'block in Gem::Ext::Builder#build_extensions'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/rubygems/ext/builder.rb:251:in 'Array#each'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/rubygems/ext/builder.rb:251:in 'Gem::Ext::Builder#build_extensions'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/rubygems/installer.rb:822:in 'Gem::Installer#build_extensions'
/home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/rubygems_gem_installer.rb:125:in
'Bundler::RubyGemsGemInstaller#build_extensions'
/home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/rubygems_gem_installer.rb:35:in
'Bundler::RubyGemsGemInstaller#install'
/home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/source/rubygems.rb:223:in 'block in
Bundler::Source::Rubygems#install'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/rubygems.rb:1053:in 'Gem.time'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/source/rubygems.rb:222:in 'Bundler::Source::Rubygems#install'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/installer/gem_installer.rb:68:in 'Bundler::GemInstaller#install'
/home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/installer/gem_installer.rb:17:in
'Bundler::GemInstaller#install_from_spec'
/home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/installer/parallel_installer.rb:203:in
'Bundler::ParallelInstaller#do_install'
/home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/installer/parallel_installer.rb:173:in 'block in
Bundler::ParallelInstaller#worker_pool'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/worker.rb:70:in 'Bundler::Worker#apply_func'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/worker.rb:65:in 'block in Bundler::Worker#process_queue'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/worker.rb:56:in 'Kernel#loop'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/worker.rb:56:in 'Bundler::Worker#process_queue'
  /home/watson/.rbenv/versions/4.0.5/lib/ruby/site_ruby/4.0.0/bundler/worker.rb:98:in 'block (2 levels) in Bundler::Worker#create_threads'

An error occurred while installing charlock_holmes (0.7.9), and Bundler cannot continue.

In Gemfile:
  copyright-header was resolved to 1.0.22, which depends on
    github-linguist was resolved to 9.6.0, which depends on
      charlock_holmes

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/16.1.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /tmp/pkg/src/gcc/configure --enable-languages=ada,c,c++,d,fortran,go,lto,m2,objc,obj-c++,rust,cobol --enable-bootstrap --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://github.com/CachyOS/CachyOS-PKGBUILDS/issues --with-build-config=bootstrap-lto --with-linker-hash-style=gnu --with-system-zlib --enable-cet=auto --enable-checking=release --enable-clocale=gnu --enable-default-pie --enable-default-ssp --enable-gnu-indirect-function --enable-gnu-unique-object --enable-libstdcxx-backtrace --enable-link-serialization=1 --enable-linker-build-id --enable-lto --enable-multilib --enable-plugin --enable-shared --enable-threads=posix --disable-libssp --disable-libstdcxx-pch --disable-werror --disable-fixincludes
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.1.1 20260430 (GCC)

`charlock_holmes` (0.7.9) fails to build its native extension on environments with GCC 16.1.1 and ICU 78 due to C++ compatibility issues. Since `copyright-header` is a development utility used for inserting copyright notices into source files, removing it has no impact on the core functionality of the application. This change unblocks `bundle update` on modern environments by removing the dependency chain: copyright-header -> github-linguist -> charlock_holmes.

kenhys

How about applying :development and :test grouping appropriately?
The result of bundle install is same, but we can control it without 'development test'.

Watson1978 · 2026-06-26T08:57:56Z

@kenhys Thanks for the suggestion! I understand that grouping dependencies is generally a good practice.

However, I realized that if we keep copyright-header in the Gemfile (even in a separate group), Bundler will still try to install it by default unless developers explicitly run bundle config set without ... locally.
Since I only maintain this repository occasionally, I'm absolutely sure I will forget this local configuration in the future and fall into the exact same build failure trap (GCC 16.1.1 / ICU 78 compatibility issue).

To keep the development setup as frictionless as possible for everyone, I decided to take it a step further and completely remove the headers task from the Rakefile along with the gem from the Gemfile.
Updating copyright headers is a very rare operation, and if we ever need to do it again, we can just run the tool globally or use a standalone script rather than forcing it into the standard dependency tree.

I've updated the PR to remove it from both files.

Watson1978 · 2026-06-26T09:01:44Z

I plan to report the charlock_holmes build failure issue directly to their upstream repository.

Watson1978 · 2026-06-26T09:07:56Z

The issue already has been reported in brianmario/charlock_holmes#203

kenhys · 2026-06-29T00:57:40Z

...
I've updated the PR to remove it from both files.

It sounds reasonable.

kenhys

OK, let's make it forward.

Watson1978 · 2026-06-29T00:58:47Z

Thanks

Watson1978 requested a review from kenhys June 26, 2026 05:38

kenhys requested changes Jun 26, 2026

View reviewed changes

Remove headers task

2bcab21

kenhys approved these changes Jun 29, 2026

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kenhys merged commit d1d98f3 into fluent-plugins-nursery:master Jun 29, 2026
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gem: remove copyright-header to bypass charlock_holmes build failure - #430

gem: remove copyright-header to bypass charlock_holmes build failure#430
kenhys merged 2 commits into
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Watson1978:remove-copyright-header

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