Can't link php on the HPUX box (hp9000/11.00)

I am sure that the HPUX had some trouble, but I can't see what a 'invalid system id' means. some code in the source isnot fit the HP System and something else cause the bug

gcc--version 2.95.2 


cp libmodphp4.a libphp4.a
ar r libphp4.a mod_php4.o
...
gcc -c  -I./os/unix -I./include   -DHPUX11 -I/opt/src/php-4.0RC1 -I/opt/src/
phpc
gcc -c  -I./os/unix -I./include   -DHPUX11 -I/opt/src/php-4.0RC1 -I/opt/src/
phpc
gcc  -DHPUX11 -I/opt/src/php-4.0RC1 -I/opt/src/php-4.0RC1/Zend -I/opt/src/ph
p-4\
      -o httpd buildmark.o modules.o modules/php4/libphp4.a
modules/standard/lid
ld: modules/php4/libphp4.a(): Not a valid object file (invalid system id)
make[2]: *** [target_static] Error 1
make[2]: Leaving directory `/opt/src/apache_1.3.12/src'
make[1]: *** [build-std] Error 2
make[1]: Leaving directory `/opt/src/apache_1.3.12'
make: *** [build] Error 2
<end error message>