With very up-to-date pkgsrc-HEAD (plus ryoon's x11-links patches) I see similar failure on i386-6.99.38:
[...] checking for deflate in -lz... yes checking libpng-config script... /usr/pkg/bin/libpng-config, cflags: -I/usr/pkg/include/libpng16, libs: -Wl,-R/usr/pkg/lib -L/usr/pkg/lib -lpng16 checking for FcInit in -lfontconfig... no configure: error: fontconfig support requested, but not found *** Error code 1 Stop. make[1]: stopped in /x/pkgsrc/graphics/gd *** Error code 1 Stop. make: stopped in /x/pkgsrc/graphics/gd -- |/"\ John D. Baker, KN5UKS NetBSD Darwin/MacOS X |\ / jdbaker[snail]mylinuxisp[flyspeck]com OpenBSD FreeBSD | X No HTML/proprietary data in email. BSD just sits there and works! |/ \ GPGkeyID: D703 4A7E 479F 63F8 D3F4 BD99 9572 8F23 E4AD 1645