cat >> layout/build/Makefile.in << "EOF" &&
ifdef MOZ_ENABLE_CANVAS
EXTRA_DSO_LDOPTS += -lX11 -lXrender
endif
EOF
sed -i "s/^    enum$/& xptinfo_enum_1/" \
    xpcom/reflect/xptinfo/public/xptinfo.h &&
make -f client.mk build



-----------------------------------
/usr/bin/ld: cannot find -lX11
collect2: ld returned 1 exit status
make[4]: *** [libgklayout.so] Error 1
make[4]: Leaving directory `/sources/firefox-build/layout/build'
make[3]: *** [libs] Error 2
make[3]: Leaving directory `/sources/firefox-build/layout'
make[2]: *** [tier_9] Error 2
make[2]: Leaving directory `/sources/firefox-build'
make[1]: *** [default] Error 2
make[1]: Leaving directory `/sources/firefox-build'
make: *** [build] Error 2