Cloud9上でbundle install を行うとsassc 2.2.1の処理でエラーが出る

困っていること

Cloud9 の環境で　bundle install を行うと以下のようなエラーが出て、処理が止まってしまいます。
このErrorの示す内容がわからず、手が止まっています。調査方針や、対応すべきことについてご示唆を頂けないでしょうか。

ec2-user:~/environment/toy_app01 (master) $ bundle install

・・・

Fetching sassc 2.2.1
Installing sassc 2.2.1 with native extensions
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/sassc-2.2.1/ext
/home/linuxbrew/.linuxbrew/opt/ruby/bin/ruby -I /home/linuxbrew/.linuxbrew/Cellar/ruby/2.6.5/lib/ruby/2.6.0 -r ./siteconf20191226-5721-2rgrgx.rb extconf.rb
creating Makefile

current directory: /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/sassc-2.2.1/ext
make "DESTDIR=" clean

current directory: /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/sassc-2.2.1/ext
make "DESTDIR="
compiling ./libsass/src/util_string.cpp
compiling ./libsass/src/ast_values.cpp
In file included from ./libsass/src/ast.hpp:19:0,
                 from ./libsass/src/ast_values.cpp:5:
./libsass/src/util.hpp: In function 'T Sass::absmod(const T&, const T&)':
./libsass/src/util.hpp:28:11: error: 'fmod' is not a member of 'std'
     T m = std::fmod(n, r);
           ^
./libsass/src/util.hpp:28:11: note: suggested alternative:
In file included from /home/linuxbrew/.linuxbrew/include/features.h:368:0,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/5.5.0_7/include/c++/5.5.0/x86_64-unknown-linux-gnu/bits/os_defines.h:39,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/5.5.0_7/include/c++/5.5.0/x86_64-unknown-linux-gnu/bits/c++config.h:489,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/5.5.0_7/include/c++/5.5.0/string:38,
                 from ./libsass/src/sass.hpp:55,
                 from ./libsass/src/ast_values.cpp:3:
/home/linuxbrew/.linuxbrew/include/bits/mathcalls.h:187:1: note:   'fmod'
 __MATHCALL (fmod,, (_Mdouble_ __x, _Mdouble_ __y));
 ^
make: *** [ast_values.o] Error 1

make failed, exit code 2

Gem files will remain installed in /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/sassc-2.2.1 for inspection.
Results logged to /home/ec2-user/.rvm/gems/ruby-2.6.3/extensions/x86_64-linux/2.6.0/sassc-2.2.1/gem_make.out

An error occurred while installing sassc (2.2.1), and Bundler cannot continue.
Make sure that `gem install sassc -v '2.2.1' --source 'https://rubygems.org/'` succeeds before bundling.

In Gemfile:
  sass-rails was resolved to 6.0.0, which depends on
    sassc-rails was resolved to 2.1.2, which depends on
      sassc

試したこと

$ gem install sassc -v '2.2.1' --source を実行したところ　また別のエラーが出てしまいました。

ec2-user:~/environment/toy_app01 (master) $ gem install sassc -v '2.2.1' --source 'https://rubygems.org/'
Building native extensions. This could take a while...
ERROR:  Error installing sassc:
        ERROR: Failed to build gem native extension.

    current directory: /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/sassc-2.2.1/ext
/home/linuxbrew/.linuxbrew/opt/ruby/bin/ruby -I /home/linuxbrew/.linuxbrew/Cellar/ruby/2.6.5/lib/ruby/2.6.0 -r ./siteconf20191226-5969-fo0u2g.rb extconf.rb
creating Makefile

current directory: /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/sassc-2.2.1/ext
make "DESTDIR=" clean

current directory: /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/sassc-2.2.1/ext
make "DESTDIR="
compiling ./libsass/src/util_string.cpp
compiling ./libsass/src/ast_values.cpp
In file included from ./libsass/src/ast.hpp:19:0,
                 from ./libsass/src/ast_values.cpp:5:
./libsass/src/util.hpp: In function 'T Sass::absmod(const T&, const T&)':
./libsass/src/util.hpp:28:11: error: 'fmod' is not a member of 'std'
     T m = std::fmod(n, r);
           ^
./libsass/src/util.hpp:28:11: note: suggested alternative:
In file included from /home/linuxbrew/.linuxbrew/include/features.h:368:0,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/5.5.0_7/include/c++/5.5.0/x86_64-unknown-linux-gnu/bits/os_defines.h:39,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/5.5.0_7/include/c++/5.5.0/x86_64-unknown-linux-gnu/bits/c++config.h:489,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc/5.5.0_7/include/c++/5.5.0/string:38,
                 from ./libsass/src/sass.hpp:55,
                 from ./libsass/src/ast_values.cpp:3:
/home/linuxbrew/.linuxbrew/include/bits/mathcalls.h:187:1: note:   'fmod'
 __MATHCALL (fmod,, (_Mdouble_ __x, _Mdouble_ __y));
 ^
make: *** [ast_values.o] Error 1

make failed, exit code 2

Gem files will remain installed in /home/ec2-user/.rvm/gems/ruby-2.6.3/gems/sassc-2.2.1 for inspection.
Results logged to /home/ec2-user/.rvm/gems/ruby-2.6.3/extensions/x86_64-linux/2.6.0/sassc-2.2.1/gem_make.out

行動規範の内容に同意します

回答1件

ベストアンサー

Sassc gemが依存しているlibsass側の問題とのことです（Issue）。

とりあえずの解決策としては、

sassc gemを2.1.0まで落とす
GCCのバージョンを上げる

どちらかになりそうです。

投稿2019/12/26 02:34

maisumakun

総合スコア145186

napoano365

2019/12/26 03:49

ご回答ありがとうございます。 ■使っているOSが以下の通りLinux系であり、 ``` ec2-user:~/environment/toy_app01 (master) $ cat /etc/os-release NAME="Amazon Linux AMI" VERSION="2018.03" ID="amzn" ID_LIKE="rhel fedora" VERSION_ID="2018.03" PRETTY_NAME="Amazon Linux AMI 2018.03" ANSI_COLOR="0;33" CPE_NAME="cpe:/o:amazon:linux:2018.03:ga" HOME_URL="http://aws.amazon.com/amazon-linux-ami/" ``` また、リンクを張っていただいたサイトに投稿されていた以下コメントの通り（Note: upgrading compiler isn't always solution e.g. linuxbrew uses gcc 5.5.） Homebrewではgccは5.5を使用したがるようなので… ``` ec2-user:~/environment/toy_app01 (master) $ brew install gcc Warning: gcc 5.5.0_7 is already installed and up-to-date To reinstall 5.5.0_7, run `brew reinstall gcc` ``` ご提案頂いた中では、「sassc gemを2.1.0まで落とす」という対処が必要かと考えています。 ``` In Gemfile: sass-rails was resolved to 6.0.0, which depends on sassc-rails was resolved to 2.1.2, which depends on sassc ``` とのことでsass-railsの6.0.0がsasscの2.2.1に依存しているようなので一つ前の ``` gem 'sass-rails', '5.1.0' ``` を指定するようにしました。ご確認ありがとうございました。

行動規範の内容に同意します