Metis fix

Error message

In file included from ./metis.h:36,
from coarsen.c:13:
./proto.h:462: error: conflicting types for ‘__log2’
/usr/include/bits/mathcalls.h:145: note: previous declaration of ‘__log2’ was here
make[1]: *** [coarsen.o] Error 1
make[1]: Leaving directory `/home/km/Downloads/metis/metis-4.0/Lib'
make: *** [default] Error 2

can be fixed by

I know about a fix : change log2 by ilog2 in metis source files :

kmetis.c kvmetis.c mkmetis.c util.c
proto.h rename.h

(taken from forum post here: http://www.code-aster.org/forum2/viewtopic.php?id=13444 )

Remove Every 2nd (or 3rd, etc) line in Unix

awk 'NR%2 != 0' filename1 > filename2