Hi, If you are referring to the configure script, then for compiling SOPE (which you should compile before SOGo), you only need these flags: --with-gnustep, --enabled-debug, --disable-strip. And for SOGo, you need --enable-debug and --disable-strip.
The FAQ might have been down or something. Have you installed all the required dependencies ? -- users@sogo.nu https://inverse.ca/sogo/lists
