Compling Genesis-2.3 on Ubuntu 9.0.4

[Karthikeyan Subramanian]

Compiling Genesis-2.3 on Ubuntu 9.0.4 fails with the following messages:

In file included from /usr/include/unistd.h:1112,
                 from sim_notes.c:54:
/usr/include/bits/unistd.h: In function ‘GetHeader’:
/usr/include/bits/unistd.h:36: error: nested function ‘read’ declared ‘extern’
/usr/include/bits/unistd.h:35: error: static declaration of ‘read’ follows non-static declaration
/usr/include/unistd.h:327: error: previous declaration of ‘read’ was here
/usr/include/bits/unistd.h:142: error: nested function ‘readlink’ declared ‘extern’
/usr/include/bits/unistd.h:140: error: static declaration of ‘readlink’ follows non-static declaration
/usr/include/unistd.h:787: error: previous declaration of ‘readlink’ was here
/usr/include/bits/unistd.h:202: error: nested function ‘getcwd’ declared ‘extern’
/usr/include/bits/unistd.h:201: error: static declaration of ‘getcwd’ follows non-static declaration
/usr/include/unistd.h:477: error: previous declaration of ‘getcwd’ was here
/usr/include/bits/unistd.h:223: error: nested function ‘getwd’ declared ‘extern’
/usr/include/bits/unistd.h:222: error: static declaration of ‘getwd’ follows non-static declaration
/usr/include/unistd.h:490: error: previous declaration of ‘getwd’ was here
/usr/include/bits/unistd.h:242: error: nested function ‘confstr’ declared ‘extern’
/usr/include/bits/unistd.h:241: error: static declaration of ‘confstr’ follows non-static declaration
/usr/include/unistd.h:580: error: previous declaration of ‘confstr’ was here
/usr/include/bits/unistd.h:267: error: nested function ‘getgroups’ declared ‘extern’
/usr/include/bits/unistd.h:266: error: static declaration of ‘getgroups’ follows non-static declaration
/usr/include/unistd.h:668: error: previous declaration of ‘getgroups’ was here
/usr/include/bits/unistd.h:293: error: nested function ‘ttyname_r’ declared ‘extern’
/usr/include/bits/unistd.h:292: error: static declaration of ‘ttyname_r’ follows non-static declaration
/usr/include/unistd.h:752: error: previous declaration of ‘ttyname_r’ was here
/usr/include/bits/unistd.h:319: error: nested function ‘getlogin_r’ declared ‘extern’
/usr/include/bits/unistd.h:318: error: static declaration of ‘getlogin_r’ follows non-static declaration
/usr/include/unistd.h:835: error: previous declaration of ‘getlogin_r’ was here
/usr/include/bits/unistd.h:346: error: nested function ‘gethostname’ declared ‘extern’
/usr/include/bits/unistd.h:345: error: static declaration of ‘gethostname’ follows non-static declaration
/usr/include/unistd.h:857: error: previous declaration of ‘gethostname’ was here
/usr/include/bits/unistd.h:375: error: nested function ‘getdomainname’ declared ‘extern’
/usr/include/bits/unistd.h:374: error: static declaration of ‘getdomainname’ follows non-static declaration
/usr/include/unistd.h:875: error: previous declaration of ‘getdomainname’ was here
make: ***  Error 1

To fix the above, I did a small hack. I commented out the following line in the file sim_notes.c.
Line 54: #include <unistd.h>

I am not sure why the above hack works but it compiles successfully after this hack. If anyone can shed more light on this, I'd appreciate it.

cheers,
Kartik