# oslevel -s
6100-00-02-0750

# uname -a
AIX boxname 1 6 0003338AD300

# gcc -v
Using built-in specs.
Target: powerpc-ibm-aix5.3.0.0
Configured with: ../configure --with-as=/usr/bin/as --with-ld=/usr/bin/ld --disable-nls --enable-languages=c,c++ --prefix=/opt/freeware --enable-threads --enable-version-specific-runtime-libs --host=powerpc-ibm-aix5.3.0.0
Thread model: aix
gcc version 4.0.0

Configure line: 
# ./configure --prefix=/opt/freeware --enable-as-needed --without-kmem-usage

Errors during configure:
hecking libperfstat.h presence... yes
configure: WARNING: libperfstat.h: present but cannot be compiled
configure: WARNING: libperfstat.h:     check for missing prerequisite headers?
configure: WARNING: libperfstat.h: see the Autoconf documentation
configure: WARNING: libperfstat.h:     section "Present But Cannot Be Compiled"
configure: WARNING: libperfstat.h: proceeding with the preprocessor's result
configure: WARNING: libperfstat.h: in the future, the compiler will take precedence
configure: WARNING:     ## ---------------------------------------------------- ##
configure: WARNING:     ## Report this to net-snmp-coders@lists.sourceforge.net ##
configure: WARNING:     ## ---------------------------------------------------- ##

and

checking sys/stream.h presence... yes
configure: WARNING: sys/stream.h: present but cannot be compiled
configure: WARNING: sys/stream.h:     check for missing prerequisite headers?
configure: WARNING: sys/stream.h: see the Autoconf documentation
configure: WARNING: sys/stream.h:     section "Present But Cannot Be Compiled"
configure: WARNING: sys/stream.h: proceeding with the preprocessor's result
configure: WARNING: sys/stream.h: in the future, the compiler will take precedence
configure: WARNING:     ## ---------------------------------------------------- ##
configure: WARNING:     ## Report this to net-snmp-coders@lists.sourceforge.net ##
configure: WARNING:     ## ---------------------------------------------------- ##

Error during make:
/usr/include/unistd.h:916: error: parse error before 'rid_t'
system.c: In function 'get_myaddr':
system.c:589: error: storage size of 'ifc' isn't known
system.c:605: error: invalid application of 'sizeof' to incomplete type 'struct ifreq'
system.c:610: error: invalid application of 'sizeof' to incomplete type 'struct ifreq'
system.c:613: error: invalid application of 'sizeof' to incomplete type 'struct ifconf'
system.c:641: error: dereferencing pointer to incomplete type
system.c:642: error: dereferencing pointer to incomplete type
system.c:647: error: dereferencing pointer to incomplete type
system.c:650: error: dereferencing pointer to incomplete type
system.c:652: error: invalid application of 'sizeof' to incomplete type 'struct oifreq'
system.c:655: error: dereferencing pointer to incomplete type
system.c:655: error: 'IFF_UP' undeclared (first use in this function)
system.c:655: error: (Each undeclared identifier is reported only once
system.c:655: error: for each function it appears in.)
system.c:659: error: dereferencing pointer to incomplete type
system.c:666: error: invalid application of 'sizeof' to incomplete type 'struct oifreq'
system.c:670: error: dereferencing pointer to incomplete type
make: 1254-004 The error code from the last command is 1.


Stop.
make: 1254-004 The error code from the last command is 2.