Failed to compile the "modules"

[tonypowell]

When trying to compile with "genkernel all", I get this warning before telling me it failed

[dwbowyer]

Not sure where or when I read about it, since it didn't matter much to me, but I think it was phoronix.com.

I'm about 95% sure I remember this correctly. As you no doubt know, it's a hard term to run a search in forums , for me to verify.
The option "-Wno-unused-but-set-variable-" is supported by >=gcc-4.6.0 and supposedly ignored by <=gcc.4.5.x.


This offers the best description I could find in 10 minutes of google search.
http://lists.fedoraproject.org/pipermail/devel/2011-February/148523.html

Long and short of it -- packages with this problem need to define the unused variables as unused, cast to void, or as a damn dirty hack
set -Wpermissive.

Your solution (one time only), I think, might be to add -Wunused-but-set-variable or -Wpermissive to CFLAGS for that one package to build.
Don't set that permanently though.