安装时出错'；e1071和x27；在Mac上的R中

我已经检查了终端，gcc已经安装并更新。 我还尝试手动下载最新和以前的版本，并将它们安装在R控制台上。错误仍然存在。 我怎样才能修好它

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谢谢

我通过Anaconda使用RStudio时遇到了这个错误。我刚从R网站重新下载了RStudio，现在错误已经消失，e1071安装得很好。

对我来说很有效，但奇怪的是，为什么从Anaconda启动时失败了。

> install.packages('e1071')
trying URL 'https://cran.rstudio.com/src/contrib/e1071_1.6-8.tar.gz'
Content type 'application/x-gzip' length 581513 bytes (567 KB)
==================================================
downloaded 567 KB

* installing *source* package ‘e1071’ ...
** package ‘e1071’ successfully unpacked and MD5 sums checked
checking for C++ compiler default output file name... a.out
checking whether the C++ compiler works... configure: error: cannot 
run C++ compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details.
ERROR: configuration failed for package ‘e1071’
* removing ‘/anaconda3/lib/R/library/e1071’
Warning in install.packages :
installation of package ‘e1071’ had non-zero exit status