OSX Catalina 上的C++和宝石问题

Problems with C++ and gems on OSX Catalina

本文关键字：问题 石问题 Catalina 上的 C++ OSX      更新时间：2023-10-16

我正在尝试使用以下命令安装新的 gem：

gem install sassc

但它失败了，C++问题：

current directory: /usr/local/lib/ruby/gems/2.6.0/gems/sassc-2.2.0/ext
/usr/local/opt/ruby/bin/ruby -I /usr/local/Cellar/ruby/2.6.5/lib/ruby/2.6.0 -r ./siteconf20191127-10955-52fjdl.rb extconf.rb
creating Makefile
current directory: /usr/local/lib/ruby/gems/2.6.0/gems/sassc-2.2.0/ext
make "DESTDIR=" clean
current directory: /usr/local/lib/ruby/gems/2.6.0/gems/sassc-2.2.0/ext
make "DESTDIR="
compiling ./libsass/src/units.cpp
In file included from ./libsass/src/units.cpp:3:
In file included from ./libsass/src/units.hpp:4:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:314:9: error: no member named 'signbit' in the global namespace
using ::signbit;
~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:315:9: error: no member named 'fpclassify' in the global namespace
using ::fpclassify;
~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:316:9: error: no member named 'isfinite' in the global namespace; did you mean 'finite'?
using ::isfinite;
~~^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/math.h:749:12: note: 'finite' declared here
extern int finite(double)
^
In file included from ./libsass/src/units.cpp:3:
In file included from ./libsass/src/units.hpp:4:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:317:9: error: no member named 'isinf' in the global namespace
using ::isinf;
~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:318:9: error: no member named 'isnan' in the global namespace
using ::isnan;
~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:319:9: error: no member named 'isnormal' in the global namespace
using ::isnormal;
~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:320:7: error: no member named 'isgreater' in the global namespace; did you mean '::std::greater'?
using ::isgreater;
^~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:728:29: note: '::std::greater' declared here
struct _LIBCPP_TEMPLATE_VIS greater : binary_function<_Tp, _Tp, bool>
^
In file included from ./libsass/src/units.cpp:3:
In file included from ./libsass/src/units.hpp:4:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:321:7: error: no member named 'isgreaterequal' in the global namespace; did you mean '::std::greater_equal'?
using ::isgreaterequal;
^~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:757:29: note: '::std::greater_equal' declared here
struct _LIBCPP_TEMPLATE_VIS greater_equal : binary_function<_Tp, _Tp, bool>
^
In file included from ./libsass/src/units.cpp:3:
In file included from ./libsass/src/units.hpp:4:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:322:9: error: no member named 'isless' in the global namespace
using ::isless;
~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:323:9: error: no member named 'islessequal' in the global namespace
using ::islessequal;
~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:324:9: error: no member named 'islessgreater' in the global namespace
using ::islessgreater;
~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:325:9: error: no member named 'isunordered' in the global namespace
using ::isunordered;
~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:326:9: error: no member named 'isunordered' in the global namespace
using ::isunordered;
~~^
13 errors generated.
make: *** [units.o] Error 1
make failed, exit code 2

我已经尝试了我在SO上找到的所有内容，但到目前为止没有任何帮助

通过一个快速的论坛找到了解决方案，它与我一起工作，似乎命令行工具以某种方式损坏或只是被弃用。

TL;博士;

  1. 删除命令行工具目录：sudo rm -rf /Library/Developer/CommandLineTools
  2. 重新创建方式：sudo xcode-select -s /Applications/Xcode.app

原来我的/usr/local/include文件夹中有一堆奇怪的符号链接。 我删除了整个文件夹并重新安装了Homebrew，一切又恢复正常了。

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