icecat error

    INPUT("../../../gfx/skia/SkFontHost_FreeType.o")
    INPUT("../../../gfx/skia/SkFontHost_FreeType_common.o")
    INPUT("../../../gfx/skia/SkOSFile_posix.o")
    INPUT("../../../gfx/skia/SkTime_Unix.o")
    INPUT("../../../gfx/skia/SkTLS_pthread.o")
    INPUT("../../../gfx/skia/SkThreadUtils_pthread.o")
    INPUT("../../../gfx/skia/opts_check_SSE2.o")
    INPUT("../../../gfx/skia/SkBitmapFilter_opts_SSE2.o")
    INPUT("../../../gfx/skia/SkBitmapProcState_opts_SSE2.o")
    INPUT("../../../gfx/skia/SkBitmapProcState_opts_SSSE3.o")
    INPUT("../../../gfx/skia/SkBlitRect_opts_SSE2.o")
    INPUT("../../../gfx/skia/SkBlitRow_opts_SSE2.o")
    INPUT("../../../gfx/skia/SkBlurImage_opts_SSE2.o")
    INPUT("../../../gfx/skia/SkMorphology_opts_SSE2.o")
    INPUT("../../../gfx/skia/SkUtils_opts_SSE2.o")
    INPUT("../../../gfx/skia/SkXfermode_opts_none.o")

../../../gfx/skia/SkFontHost_FreeType.o: In function `SkTypeface_FreeType::onGetAdvancedTypefaceMetrics(SkAdvancedTypefaceMetrics::PerGlyphInfo, unsigned int const*, unsigned int) const':
SkFontHost_FreeType.cpp:(.text+0x1f45): undefined reference to `FT_Get_X11_Font_Format'
collect2: error: ld returned 1 exit status
/usr/ports/misc/icecat/work/src/icecat-31.8.0/config/rules.mk:882: recipe for target 'libxul.so' failed
make[5]: *** [libxul.so] Error 1
make[5]: Leaving directory '/usr/ports/misc/icecat/work/src/icecat-31.8.0/obj-x86_64-unknown-linux-gnu/toolkit/library/build'
/usr/ports/misc/icecat/work/src/icecat-31.8.0/config/recurse.mk:95: recipe for target 'toolkit/library/build/libs' failed
make[4]: *** [toolkit/library/build/libs] Error 2
make[4]: Leaving directory '/usr/ports/misc/icecat/work/src/icecat-31.8.0/obj-x86_64-unknown-linux-gnu'
/usr/ports/misc/icecat/work/src/icecat-31.8.0/config/recurse.mk:39: recipe for target 'libs' failed
make[3]: *** [libs] Error 2
make[3]: Leaving directory '/usr/ports/misc/icecat/work/src/icecat-31.8.0/obj-x86_64-unknown-linux-gnu'
/usr/ports/misc/icecat/work/src/icecat-31.8.0/config/rules.mk:592: recipe for target 'default' failed
make[2]: *** [default] Error 2
make[2]: Leaving directory '/usr/ports/misc/icecat/work/src/icecat-31.8.0/obj-x86_64-unknown-linux-gnu'
/usr/ports/misc/icecat/work/src/icecat-31.8.0/client.mk:381: recipe for target 'realbuild' failed
make[1]: *** [realbuild] Error 2
make[1]: Leaving directory '/usr/ports/misc/icecat/work/src/icecat-31.8.0'
client.mk:168: recipe for target 'build' failed
make: *** [build] Error 2
=======> ERROR: Building '/usr/ports/misc/icecat/icecat#31.8.0-1.pkg.tar.gz' failed.