无法安装gdtools或svglite

Question

我需要安装svglite，但出现了一个错误，告诉我首先需要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’

有谁能帮帮我吗？

Answer 1

我也遇到了同样的问题，下面的解决方案对我很有效：

brew install pkg-config brew install cairo

然后我就可以成功地安装gdtools和svglite R包了。

Answer 2

即使是通过Homebrew安装cairo和pkg-config，我也遇到了同样的问题，PKG_CONFIG_PATH的解决方案对我来说都不起作用。

但是在devtools上安装GitHub版本做到了这一点：

devtools::install_github('davidgohel/gdtools')

devtools::install_github("r-lib/svglite")

devtools正确找到路径和标志肯定是有原因的，也许有人可以解释一下。

此外，如果你想保持你的GitHub版本更新，你可以使用dtupdate R包。

Answer 3

与@bogenton的答案类似，解决方案是同时安装cairo和pkgconfig。

对于其他使用conda而不是brew的用户：

conda install -c anaconda cairo  
conda install -c anaconda pkgconfig