Merge pull request #757 from jalvesz/readme-info

Add CLI option for building with fpm

Author: jvdp1

README.md

@@ -184,6 +184,14 @@ git checkout stdlib-fpm
 fpm build --profile release
 ```
 
+**Alternative**: as `fpm` does not currently support `fypp` natively, building `stdlib` with `fpm` can be done in two steps: a) launch the preprocessor through the `fpm-deployment.sh` script, which creates a subfolder `stdlib-fpm` and b) build the project using the processed files within the latter subfolder. This process can be done with the following commands:
+
+```sh
+source ./ci/fpm-deployment.sh
+cd stdlib-fpm/
+fpm build --profile release
+```
+
 You can run the examples with `fpm` as:
 
 ```sh