🚀 go-pugleaf

If you find when installing 2.4.0 that you can't put assert.h into
/usr/local/include, it is NOT a good idea to specify --local-prefix!

The main effect of --local-prefix is to tell GCC to search some other
dir instead of /usr/local/include.  And that is correct only if
/usr/local/include is not the right place to put a directory of
site-specific include files in your system.  Whether you can put
assert.h there is a secondary matter, which shouldn't be the deciding
factor for where --local-prefix is.

Instead, the way to cope with being unable to write /usr/local/include
is to set the make variable assertdir to put assert.h in one of the
other directories that GCC searches.

I will change this situation in 2.4.1.