r - 无法安装 gdtools 或 svglite

Question

我需要安装 svglite，但是出现一个错误，说我首先需要 gdtools，所以我尝试安装 gdtools 并得到以下错误:

   > install.packages("gdtools", lib="/usr/local/lib/R/3.4/site-library")
trying URL 'https://cran.rstudio.com/src/contrib/gdtools_0.1.4.tar.gz'
Content type 'application/x-gzip' length 33931 bytes (33 KB)
==================================================
downloaded 33 KB

* installing *source* package ‘gdtools’ ...
** package ‘gdtools’ successfully unpacked and MD5 sums checked
Using PKG_CFLAGS=-I/usr/local/opt/cairo/include/cairo
Using PKG_LIBS=-L/usr/local/opt/cairo/lib -lcairo
** libs
clang++  -I/usr/local/Cellar/r/3.4.1_1/lib/R/include -DNDEBUG -I/usr/local/opt/cairo/include/cairo -I../inst/include/ -I"/usr/local/lib/R/3.4/site-library/Rcpp/include" -I/usr/local/opt/gettext/include -I/usr/local/opt/readline/include -I/usr/local/include   -fPIC  -g -O2  -c CairoContext.cpp -o CairoContext.o
In file included from CairoContext.cpp:7:
/usr/local/opt/cairo/include/cairo/cairo-ft.h:46:10: fatal error: 'ft2build.h' file not found
#include <ft2build.h>
         ^
1 error generated.
make: *** [CairoContext.o] Error 1
ERROR: compilation failed for package ‘gdtools’
* removing ‘/usr/local/lib/R/3.4/site-library/gdtools’
Warning in install.packages :
  installation of package ‘gdtools’ had non-zero exit status

The downloaded source packages are in
    ‘/private/var/folders/2c/2dtnf2fs5z7cy45v5gt32n0m0000gn/T/Rtmpj7APMT/downloaded_packages’

有人可以帮我吗？

Answer 1

我遇到了同样的问题，以下解决方案对我有用:
brew install pkg-config
brew install cairo
然后我就能够成功安装 gdtools和 svglite R 包。