build/xilinx/vivado: only generate constraints that are not empty
authorFlorent Kermarrec <florent@enjoy-digital.fr>
Mon, 8 Jan 2018 16:03:19 +0000 (17:03 +0100)
committerFlorent Kermarrec <florent@enjoy-digital.fr>
Mon, 8 Jan 2018 16:03:19 +0000 (17:03 +0100)
commit10000eb607c3a44214a387a1c9b3af51d9f59f40
tree7456d7ab7e9d0a86d5f13e7b63e8343ab66bd4cd
parent5681a3c1a9a842460db8ba4a13e44d692d3aa89b
build/xilinx/vivado: only generate constraints that are not empty
litex/build/xilinx/vivado.py