Build.md

@@ -37,18 +37,19 @@ Transport Layers can be (de-)activated with `make HAVE_<LAYER>=(0)1`
 All Layers other than mpi require the tcp Layer and MiniPMI to be available.
 The following transport layers and other variables may be used:
 
-| Layer | Variable | Default | Description |
-| ----- | -------- | ------- | ----------- |
-| `mpi` | `HAVE_MPI` | Enabled | MPI |
-| `tcp` | `HAVE_TCP` | Disabled | Automatically enabled if any Layer below is enabled |
-| `ibverbs` | `HAVE_IBVERBS` | Disabled| Verbs-based implementation |
-| `psm2` | `HAVE_PSM2` | Disabled| PSM2 (Omni-Path) |
-| `ucp` | `HAVE_UCP` | Disabled| UCX (using high level api ucp) |
-| `cuda` | `HAVE_CUDA` | Disabled| NVLink (node-internal) |
-|  | `CUARCH` |  | Needs to be set if `cuda` is enable |
-|  | `V` |  | If defined prints detailed steps and additional variables |
-|  | `SYSTEM` | `generic` | Use predefined custom affinities for HCAs and GPUs |
-|  | `PREFIX` | `/usr/local/bin` | Install directory for binaries |
+| Layer      | Variable       | Default          | Description |
+| ---------- | -------------- | ---------------- | ----------- |
+| `mpi`      | `HAVE_MPI`     | Enabled          | MPI |
+| `tcp`      | `HAVE_TCP`     | Disabled         | Automatically enabled if any Layer below is enabled |
+| `ibverbs`  | `HAVE_IBVERBS` | Disabled         | Verbs-based implementation |
+| `psm2`     | `HAVE_PSM2`    | Disabled         | PSM2 (Omni-Path) |
+| `ucp`      | `HAVE_UCP`     | Disabled         | UCX (using high level api ucp) |
+| `portals`  | `HAVE_PORTALS` | Disabled         | Portals4 (f.ex. BXI through Portals) |
+| `cuda`     | `HAVE_CUDA`    | Disabled         | NVLink (node-internal) |
+|            | `CUARCH`       |                  | Needs to be set if `cuda` is enable |
+|            | `V`            |                  | If defined prints detailed steps and additional variables |
+|            | `SYSTEM`       | `generic`        | Use predefined custom affinities for HCAs and GPUs |
+|            | `PREFIX`       | `/usr/local/bin` | Install directory for binaries |
 
 For `CUARCH` values see https://docs.nvidia.com/cuda/cuda-compiler-driver-nvcc/index.html#virtual-architecture-feature-list