GHDL migration check: flags VHDL lines that Vivado xsim accepts but GHDL rejects or needs flags for — UNISIM, XPM, std_logic_unsigned, VHDL-2008 without --std=08, plain shared variables, encrypted IP. Runs entirely in your browser — nothing is uploaded.
Free here: Check the open .vhd testbench or source for Vivado-only lines, with the GHDL fix and flag on each line. In the editor: Scan every .vhd file in the workspace in one pass and export a Markdown GHDL migration report with the ghdl -a flag set per library — that part asks for a licence key.
Same engine as the VS Code extension, byte for byte.