Mac 编译安装php7时提示“freetype-config not found”，怎么解决

checking for FlatFile support... no
checking whether to enable DBA interface... no
checking whether to enable DOM support... yes
checking for xml2-config path... (cached) /usr/bin/xml2-config
checking whether libxml build works... (cached) yes
checking for ENCHANT support... no
checking whether to enable EXIF (metadata from images) support... no
checking for fileinfo support... no
checking whether to enable input filter support... yes
checking pcre install prefix... no
checking whether to enable FTP support... yes
checking OpenSSL dir for FTP... no
checking for GD support... yes
checking for the location of libwebp... no
checking for the location of libjpeg... yes
checking for the location of libpng... yes
checking for the location of libXpm... no
checking for FreeType 2... yes
checking whether to enable truetype string function in GD... yes
checking whether to enable JIS-mapped Japanese font support in GD... no
If configure fails try --with-webp-dir=checking for jpeg_read_header in -ljpeg... yes
checking for png_write_image in -lpng... yes
If configure fails try --with-xpm-dir=configure: error: freetype-config not found.

checking for FlatFile support... no
checking whether to enable DBA interface... no
checking whether to enable DOM support... yes
checking for xml2-config path... (cached) /usr/bin/xml2-config
checking whether libxml build works... (cached) yes
checking for ENCHANT support... no
checking whether to enable EXIF (metadata from images) support... no
checking for fileinfo support... no
checking whether to enable input filter support... yes
checking pcre install prefix... no
checking whether to enable FTP support... yes
checking OpenSSL dir for FTP... no
checking for GD support... yes
checking for the location of libwebp... no
checking for the location of libjpeg... yes
checking for the location of libpng... yes
checking for the location of libXpm... no
checking for FreeType 2... yes
checking whether to enable truetype string function in GD... yes
checking whether to enable JIS-mapped Japanese font support in GD... no
If configure fails try --with-webp-dir=checking for jpeg_read_header in -ljpeg... yes
checking for png_write_image in -lpng... yes
If configure fails try --with-xpm-dir=configure: error: freetype-config not found.