cross-compile error: dereferencing pointer to incomplete type

build system: linux redhat9.0
cross compiler: arm-linux-gcc 2.95.3 system

configure method:
../configure --prefix=3D/root/usr --build=3Di686-linux --host=3Darm-linux
--target=3Darm-linux --with-perl-modules --with-endianness=3Dlittle 2>&1 |
tee b

error related produced result:
checking for rtentry.rt_dst... no
checking type of rtentry structure... Unknown
unknown
checking for struct rtentry... rtentry
checking for rtentry.rt_unit... no
checking for rtentry.rt_refcnt... no
checking for rtentry.rt_hash... no
checking for rtentry.rt_use... no
checking for tcpstat.tcp_rcvmemdrop... no

make result:

arm-linux-gcc -I../../include -I. -I../../agent -I../../agent/mibgroup
-I../../snmplib -g -O2 -Dlinux -c mibII/var_route.c -fPIC -DPIC -o
mibII/.libs/var_route.lo
mibII/var_route.c: In function `var_ipRouteEntry':
mibII/var_route.c:497: dereferencing pointer to incomplete type
mibII/var_route.c:540: dereferencing pointer to incomplete type
mibII/var_route.c:546: dereferencing pointer to incomplete type
mibII/var_route.c:553: dereferencing pointer to incomplete type
mibII/var_route.c:553: `RTF_GATEWAY' undeclared (first use in this function=
)
mibII/var_route.c:553: (Each undeclared identifier is reported only once
mibII/var_route.c:553: for each function it appears in.)
mibII/var_route.c:598: dereferencing pointer to incomplete type
mibII/var_route.c:604: dereferencing pointer to incomplete type
mibII/var_route.c:604: `RTF_UP' undeclared (first use in this function)
mibII/var_route.c:605: dereferencing pointer to incomplete type
mibII/var_route.c:619: dereferencing pointer to incomplete type
mibII/var_route.c:619: `RTF_DYNAMIC' undeclared (first use in this function=
)
mibII/var_route.c:645: dereferencing pointer to incomplete type
mibII/var_route.c:658: dereferencing pointer to incomplete type
mibII/var_route.c:661: dereferencing pointer to incomplete type
mibII/var_route.c: In function `Route_Scan_Reload':
mibII/var_route.c:1267: storage size of `rtent' isn't known
mibII/var_route.c:1273: dereferencing pointer to incomplete type
mibII/var_route.c:1273: dereferencing pointer to incomplete type
mibII/var_route.c:1274: dereferencing pointer to incomplete type
mibII/var_route.c:1282: dereferencing pointer to incomplete type
mibII/var_route.c:1295: dereferencing pointer to incomplete type
mibII/var_route.c:1295: dereferencing pointer to incomplete type
mibII/var_route.c:1295: dereferencing pointer to incomplete type
mibII/var_route.c:1295: dereferencing pointer to incomplete type
mibII/var_route.c:1295: dereferencing pointer to incomplete type
mibII/var_route.c:1298: dereferencing pointer to incomplete type
mibII/var_route.c:1298: dereferencing pointer to incomplete type
mibII/var_route.c:1299: dereferencing pointer to incomplete type
mibII/var_route.c:1299: dereferencing pointer to incomplete type
mibII/var_route.c:1303: dereferencing pointer to incomplete type
mibII/var_route.c:1320: sizeof applied to an incomplete type
mibII/var_route.c:1325: sizeof applied to an incomplete type
mibII/var_route.c: In function `qsort_compare':
mibII/var_route.c:1375: dereferencing pointer to incomplete type
mibII/var_route.c:1378: dereferencing pointer to incomplete type
make[2]: *** [mibII/var_route.lo] Error 1
make[2]: Leaving directory `/root/snmp/net-snmp-5.2.2.rc5/agent/mibgroup'
make[1]: *** [subdirs] Error 1
make[1]: Leaving directory `/root/snmp/net-snmp-5.2.2.rc5/agent'
make: *** [subdirs] Error 1


it seems that compiler can not determine struct rtentry, but I find
the struct rtentry and `RTF_GATEWAY' are defined in route.h file under
/usr/local/arm/2.95.3/arm-linux/include/net directory. I copy the
route.h to /usr/local/arm/2.95.3/arm-linux/include/ directory and redo
above, getting the same error.

how to fix the problem? pls give me some advice.
thank u.

Rick


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