checking for gcc... clang
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether clang accepts -g... yes
checking for clang option to accept ISO C89... none needed
checking how to run the C preprocessor... clang -E
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for ANSI C header files... rm: conftest.dSYM: is a directory
rm: conftest.dSYM: is a directory
yes
checking for sys/wait.h that is POSIX.1 compatible... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for string.h... (cached) yes
checking sys/time.h usability... yes
checking sys/time.h presence... yes
checking for sys/time.h... yes
checking for unistd.h... (cached) yes
checking for an ANSI C-conforming const... yes
checking for pkg-config... /usr/local/bin/pkg-config
checking whether pkg-config knows about cairo... yes
checking for configurable backends... cairo cairo-ft cairo-pdf cairo-png cairo-ps cairo-xlib cairo-xlib-xrender
configure: CAIRO_CFLAGS=-I/usr/local/include/cairo -I/usr/X11/include -I/usr/local/include/cairo -I/usr/local/Cellar/glib/2.44.0/include/glib-2.0 -I/usr/local/Cellar/glib/2.44.0/lib/glib-2.0/include -I/usr/local/opt/gettext/include -I/usr/local/Cellar/pixman/0.32.6/include/pixman-1 -I/usr/local/Cellar/fontconfig/2.11.1/include -I/usr/local/Cellar/freetype/2.5.3_1/include/freetype2 -I/usr/local/Cellar/freetype/2.5.5/include/freetype2 -I/usr/local/Cellar/libpng/1.6.16/include/libpng16 
checking if R was compiled with the RConn patch... no
checking cairo.h usability... yes
checking cairo.h presence... yes
checking for cairo.h... yes
checking for PNG support in Cairo... yes
checking for ATS font support in Cairo... no
configure: CAIRO_LIBS=-L/usr/local/Cellar/freetype/2.5.5/lib -L/usr/local/Cellar/libpng/1.6.16/lib -L/usr/X11/lib -L/usr/local/lib -lfreetype -lz -lpng16 -lz -lXrender -lSM -lICE -lX11 -lXext -lcairo 
checking for library containing deflate... none required
checking whether Cairo programs can be compiled... yes
checking whether cairo_image_surface_get_format is declared... no
checking for FreeType support in cairo... yes
checking whether FreeType needs additional flags... no
checking wheter libjpeg works... yes
checking wheter libtiff works... yes
configure: creating ./config.status
config.status: creating src/Makevars
config.status: creating src/cconfig.h