install.packages("pander")にてx86_64-apple-darwin13.4.0-clang++: command not found出力時の対応方法

# install.packages("pander")にてエラー
エラーメッセージを見る。

``` R
> install.packages("pander")
trying URL 'https://cran.rstudio.com/src/contrib/pander_0.6.1.tar.gz'
Content type 'application/x-gzip' length 292500 bytes (285 KB)
==================================================
downloaded 285 KB

* installing *source* package ‘pander’ ...
** package ‘pander’ successfully unpacked and MD5 sums checked
** libs
x86_64-apple-darwin13.4.0-clang++  -I/Users/henoheno/anaconda3/lib/R/include -DNDEBUG  -I"/Users/henoheno/anaconda3/lib/R/library/Rcpp/include" -D_FORTIFY_SOURCE=2 -mmacosx-version-min=10.9 -I/Users/henoheno/anaconda3/include   -fPIC  -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -stdlib=libc++ -fvisibility-inlines-hidden  -fmessage-length=0 -I/Users/henoheno/anaconda3/include  -c RcppExports.cpp -o RcppExports.o
/bin/sh: x86_64-apple-darwin13.4.0-clang++: command not found
make: henoheno [RcppExports.o] Error 127
ERROR: compilation failed for package ‘pander’
* removing ‘/Users/henoheno/anaconda3/lib/R/library/pander’
Warning in install.packages :
  installation of package ‘pander’ had non-zero exit status

The downloaded source packages are in
	‘/private/var/folders/3y/0wg8k2dj4y54t1vscb0ph4t40000gp/T/RtmpjD2vVk/downloaded_packages’
Updating HTML index of packages in '.Library'
Making 'packages.html' ... done
```

これがない様子。
```
/bin/sh: x86_64-apple-darwin13.4.0-clang++: command not found
```

# エラーメッセージからx86_64-apple-darwin13.4.0-clangがないのでインストール
macのターミナルからx86_64-apple-darwin13.4.0-clangをインストール

```
[henoheno@henohenos-MacBook-Air ~]$ conda install clangxx_osx-64
Solving environment: done

## Package Plan ##

  environment location: /Users/henoheno/anaconda3

  added / updated specs: 
    - clangxx_osx-64


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    ca-certificates-2018.03.07 |                0         124 KB
    clang-4.0.1                |       h662ec87_0        73.7 MB
    ld64-274.2                 |       h7c2db76_0         2.6 MB
    cctools-895                |       h7512d6f_0         1.5 MB
    openssl-1.0.2o             |       h26aff7b_0         3.4 MB
    clang_osx-64-4.0.1         |      h1ce6c1d_10           7 KB
    clangxx_osx-64-4.0.1       |      h22b1bf0_10           7 KB
    llvm-4.0.1                 |       hc748206_0       136.7 MB
    clangxx-4.0.1              |       hc9b4283_0          10 KB
    llvm-lto-tapi-4.0.1        |       h6701bc3_0        11.7 MB
    compiler-rt-4.0.1          |       h5487866_0         963 KB
    conda-4.5.0                |           py36_0         1.0 MB
    ------------------------------------------------------------
                                           Total:       231.7 MB

The following NEW packages will be INSTALLED:

    cctools:         895-h7512d6f_0       
    clang:           4.0.1-h662ec87_0     
    clang_osx-64:    4.0.1-h1ce6c1d_10    
    clangxx:         4.0.1-hc9b4283_0     
    clangxx_osx-64:  4.0.1-h22b1bf0_10    
    compiler-rt:     4.0.1-h5487866_0     
    ld64:            274.2-h7c2db76_0     
    llvm:            4.0.1-hc748206_0     
    llvm-lto-tapi:   4.0.1-h6701bc3_0     

The following packages will be UPDATED:

    ca-certificates: 2017.08.26-ha1e5d58_0 --> 2018.03.07-0     
    conda:           4.4.11-py36_0         --> 4.5.0-py36_0     
    openssl:         1.0.2n-hdbc3d79_0     --> 1.0.2o-h26aff7b_0

Proceed ([y]/n)? y


Downloading and Extracting Packages
ca-certificates 2018.03.07: ##################################################################### | 100% 
clang 4.0.1: #################################################################################### | 100% 
ld64 274.2: ##################################################################################### | 100% 
cctools 895: #################################################################################### | 100% 
openssl 1.0.2o: ################################################################################# | 100% 
clang_osx-64 4.0.1: ############################################################################# | 100% 
clangxx_osx-64 4.0.1: ########################################################################### | 100% 
llvm 4.0.1: ##################################################################################### | 100% 
clangxx 4.0.1: ################################################################################## | 100% 
llvm-lto-tapi 4.0.1: ############################################################################ | 100% 
compiler-rt 4.0.1: ############################################################################## | 100% 
conda 4.5.0: #################################################################################### | 100% 
Preparing transaction: done
Verifying transaction: done
Executing transaction: done
[henoheno@henoheno-MacBook-Air ~]$ 

```

# 再度install.packages("pander")
できた。

``` R
> install.packages("pander")
trying URL 'https://cran.rstudio.com/src/contrib/pander_0.6.1.tar.gz'
Content type 'application/x-gzip' length 292500 bytes (285 KB)
==================================================
downloaded 285 KB

* installing *source* package ‘pander’ ...
** package ‘pander’ successfully unpacked and MD5 sums checked
** libs
x86_64-apple-darwin13.4.0-clang++  -I/Users/henoheno/anaconda3/lib/R/include -DNDEBUG  -I"/Users/henoheno/anaconda3/lib/R/library/Rcpp/include" -D_FORTIFY_SOURCE=2 -mmacosx-version-min=10.9 -I/Users/henoheno/anaconda3/include   -fPIC  -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -stdlib=libc++ -fvisibility-inlines-hidden  -fmessage-length=0 -I/Users/henoheno/anaconda3/include  -c RcppExports.cpp -o RcppExports.o
x86_64-apple-darwin13.4.0-clang++  -I/Users/henoheno/anaconda3/lib/R/include -DNDEBUG  -I"/Users/henoheno/anaconda3/lib/R/library/Rcpp/include" -D_FORTIFY_SOURCE=2 -mmacosx-version-min=10.9 -I/Users/henoheno/anaconda3/include   -fPIC  -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -stdlib=libc++ -fvisibility-inlines-hidden  -fmessage-length=0 -I/Users/henoheno/anaconda3/include  -c helpers.cpp -o helpers.o
x86_64-apple-darwin13.4.0-clang++  -I/Users/henoheno/anaconda3/lib/R/include -DNDEBUG  -I"/Users/henoheno/anaconda3/lib/R/library/Rcpp/include" -D_FORTIFY_SOURCE=2 -mmacosx-version-min=10.9 -I/Users/henoheno/anaconda3/include   -fPIC  -march=core2 -mtune=haswell -mssse3 -ftree-vectorize -fPIC -fPIE -fstack-protector-strong -O2 -pipe -stdlib=libc++ -fvisibility-inlines-hidden  -fmessage-length=0 -I/Users/henoheno/anaconda3/include  -c pandoc.cpp -o pandoc.o
x86_64-apple-darwin13.4.0-clang++ -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/Users/henoheno/anaconda3/lib/R/lib -Wl,-pie -Wl,-headerpad_max_install_names -o pander.so RcppExports.o helpers.o pandoc.o -L/Users/henoheno/anaconda3/lib/R/lib -lR -L/Users/henoheno/anaconda3/lib -lintl -lc -Wl,-framework -Wl,CoreFoundation
ld: warning: -pie being ignored. It is only used when linking a main executable
installing to /Users/henoheno/anaconda3/lib/R/library/pander/libs
** R
** inst
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** installing vignettes
** testing if installed package can be loaded
* DONE (pander)

The downloaded source packages are in
	‘/private/var/folders/3y/0wg8k2dj4y54t1vscb0ph4t40000gp/T/RtmpjD2vVk/downloaded_packages’
Updating HTML index of packages in '.Library'
Making 'packages.html' ... done
> 
```