Trying to run ECWolf 1.3.3 on FreeBSD 12 leads to a memory fault:
$ ./ecwolf ReadConfig: Reading the Configuration. IWad: Selecting base game data. W_Init: Init WADfiles. adding ecwolf.pk3, 72 lumps adding ./audiot.wl6, 288 lumps adding ./gamemaps.wl6, 120 lumps adding ./vgagraph.wl6, 158 lumps adding ./vswap.wl6, 588 lumps InitGame: Setting up the game... VL_ReadPalette: Setting up the Palette... ClassDef: Loading actor definitions. S_Init: Reading SNDINFO defintions. S_Init: Reading SNDSEQ defintions. US_Startup: Starting the User Manager. CreateMenus: Preparing the menu system... DemoLoop: Starting the game loop... Memory fault
The start screen with copyright notice of id Software is shown correctly. The Wolfenstein 3D title screen is just blue, but the main theme is playing in the background. Game crashes after some seconds.