...
--arch=<add path of arch file> - Allows a user to over-ride $OIFS_ARCH loaded while sourcing oifs-config.edit_me.sh. The syntax to change the path expected path structure for <add path of arch file> is ./arch/<site>/<platform>/<compiler>/<compiler_version>. For example --arch=./arch/ecmwf/hpc2020/gnu , where the site is ecmwf, the platform is hpc2020 and the compiler is gnu. . The compiler version is not stated because the path contains a default link.
--without-single-precision or --without-double-precision - By default both single and double precision executables are built. These options negate the default option by excluding double or single precision build, which speeds up the build
...