安装OS11 Big Sur后，我的红宝石安装不再起作用，因此我尝试重新安装它。我已经rbenv从此处的说明中进行了安装，并且rbenv-doctor脚本运行指示没有问题。但是，当我尝试运行时rbenv install 2.7.2，出现与我的编译器设置相关的错误：

% rbenv install 2.7.2
Downloading ruby-2.7.2.tar.bz2...
-> https://cache.ruby-lang.org/pub/ruby/2.7/ruby-2.7.2.tar.bz2
Installing ruby-2.7.2...
ruby-build: using readline from homebrew

BUILD FAILED (macOS 11.0.1 using ruby-build 20201005)

Inspect or clean up the working tree at /var/folders/yn/wzkl_t8567l9pvwhp0wsm40w0000gn/T/ruby-build.20201121103616.80606.FFBFEn
Results logged to /var/folders/yn/wzkl_t8567l9pvwhp0wsm40w0000gn/T/ruby-build.20201121103616.80606.log

Last 10 log lines:
tool/config.guess already exists
tool/config.sub already exists
checking build system type... x86_64-apple-darwin20.1.0
checking host system type... x86_64-apple-darwin20.1.0
checking target system type... x86_64-apple-darwin20.1.0
checking whether the C compiler works... no
configure: error: in `/var/folders/yn/wzkl_t8567l9pvwhp0wsm40w0000gn/T/ruby-build.20201121103616.80606.FFBFEn/ruby-2.7.2':
configure: error: C compiler cannot create executables
See `config.log' for more details
make: *** No targets specified and no makefile found.  Stop.

config.log当然，对应的内容很长，但是相关的行是：

configure:3017: checking for ruby
configure:3035: found /usr/bin/ruby
configure:3048: result: /usr/bin/ruby
configure:3121: checking build system type
configure:3135: result: x86_64-apple-darwin20.1.0
configure:3223: checking host system type
configure:3236: result: x86_64-apple-darwin20.1.0
configure:3256: checking target system type
configure:3269: result: x86_64-apple-darwin20.1.0
configure:4016: checking for C compiler version
configure:4025: clang --version >&5
clang version 6.0.0 (tags/RELEASE_600/final)
Target: x86_64-apple-darwin20.1.0
Thread model: posix
InstalledDir: /usr/local/clang6/bin
configure:4036: $? = 0
configure:4025: clang -v >&5
clang version 6.0.0 (tags/RELEASE_600/final)
Target: x86_64-apple-darwin20.1.0
Thread model: posix
InstalledDir: /usr/local/clang6/bin
configure:4036: $? = 0
configure:4025: clang -V >&5
clang-6.0: error: argument to '-V' is missing (expected 1 value)
clang-6.0: error: no input files
configure:4036: $? = 1
configure:4025: clang -qversion >&5
clang-6.0: error: unknown argument: '-qversion'
clang-6.0: error: no input files
configure:4036: $? = 1
configure:4056: checking whether the C compiler works
configure:4078: clang  -I/Users/richard/.rbenv/versions/2.7.2/include -I/usr/local/opt/readline/include -L/Users/richard/.rbenv/versions/2.7.2/lib -L/usr/local/opt/readline/lib conftest.c  >&5
ld: library not found for -lSystem
clang-6.0: error: linker command failed with exit code 1 (use -v to see invocation)
configure:4082: $? = 1
configure:4120: result: no
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME ""
| #define PACKAGE_TARNAME ""
| #define PACKAGE_VERSION ""
| #define PACKAGE_STRING ""
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE_URL ""
| /* end confdefs.h.  */
| 
| int
| main ()
| {
| 
|   ;
|   return 0;
| }
configure:4125: error: in `/var/folders/yn/wzkl_t8567l9pvwhp0wsm40w0000gn/T/ruby-build.20201121101556.78734.11rqwy/ruby-2.7.2':
configure:4127: error: C compiler cannot create executables
See `config.log' for more details

（主要？）问题似乎是错误：

ld: library not found for -lSystem

...但是之前的错误似乎暗示configure脚本不了解命令行选项...？

以下是有关我的设置的一些相关详细信息：

XCode命令行工具：

% pkgutil --pkg-info=com.apple.pkg.CLTools_Executables | grep version
version: 12.2.0.0.1.1604076827

gcc：

% which gcc
/usr/bin/gcc

% gcc -v
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 12.0.0 (clang-1200.0.32.27)
Target: x86_64-apple-darwin20.1.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

铛：

% which clang
/usr/local/clang6/bin/clang

% clang -v
clang version 6.0.0 (tags/RELEASE_600/final)
Target: x86_64-apple-darwin20.1.0
Thread model: posix
InstalledDir: /usr/local/clang6/bin

.zprofile为了解决以前没有找到必要的头文件的问题，我的代码中也包含以下内容：

export CPATH="/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include"

预先感谢你的任何见解。