如题，mac电脑，我在安装r包的时候出现如下错误

```
* installing *source* package ‘rgl’ ...
** package ‘rgl’ successfully unpacked and MD5 sums checked
** using staged installation
checking for gcc... x86_64-apple-darwin13.4.0-clang
checking whether the C compiler works... no
configure: error: in `/private/var/folders/hs/v1wm1rpj2j15d2gcxb7bgnrw0000gn/T/RtmpuswiRr/R.INSTALL371cd915eb2/rgl':
configure: error: C compiler cannot create executables
See `config.log' for more details
ERROR: configuration failed for package ‘rgl’
* removing ‘/anaconda3/lib/R/library/rgl’
Warning in install.packages :
  installation of package ‘rgl’ had non-zero exit status

The downloaded source packages are in
        ‘/private/var/folders/hs/v1wm1rpj2j15d2gcxb7bgnrw0000gn/T/RtmpRc2sg7/downloaded_packages’
Updating HTML index of packages in '.Library'
Making 'packages.html' ... done
```
See 'config.log' for more details这里就找不到这个日志文件了，求问大佬们怎么查找