OpenNebula

This has been reported by George L. Emigh in the mailing list

So in my instance, CFLAGS is set to "-march=native -O2 -pipe -mfpmath=sse" 

and opennebula fails to build with:

gcc -o src/template/template_parser.o -c -march=native -O2 -pipe -mfpmath=sse
-rdynamic -g -Wall -Werror -DSQLITE_DB -DMYSQL_DB -DHAVE_ERRNO_AS_DEFINE=1 -
DUNIV_LINUX -Iinclude -I/usr/include -I/usr/include/mysql -
I/usr/include/libxml2 src/template/template_parser.c
cc1: warnings being treated as errors
template_parser.c: In function 'template_lex':
template_parser.l:89: error: ignoring return value of 'fwrite', declared with
attribute warn_unused_result
scons: *** [src/template/template_parser.o] Error 1
scons: building terminated because of errors.

If I remove the -O2 it builds fine, and I will just do that and move forward
for now, but opennebula should probably not fail to build with -O2