Pg 7.2.3 configure error

./configure fails for Pg 7.2.3 on HP-UX 11.11 with gcc version 2.95.2. Any
clues?

Thanks,
Ed

loading cache ./config.cache
checking host system type... hppa1.1-hp-hpux11.11
checking which template to use... hpux
checking whether to build with locale support... no
checking whether to build with recode support... no
checking whether to build with multibyte character support... no
checking whether NLS is wanted... no
checking for default port number... 5432
checking for default soft limit on number of connections... 32
checking for gcc... gcc
checking whether the C compiler (gcc ) works... yes
checking whether the C compiler (gcc ) is a cross-compiler... no
checking whether we are using GNU C... yes
checking whether gcc accepts -g... yes
using CFLAGS= -g
checking whether the C compiler (gcc -g ) works... yes
checking whether the C compiler (gcc -g ) is a cross-compiler... no

[...SNIP, SNIP...]

checking for struct sockcred... no
checking for struct sockaddr_un... yes
checking for int timezone... yes
checking types of arguments for accept()... configure: error: could not
determine argument types

$ gcc -v
Reading specs from /opt/gcc/lib/gcc-lib/hppa2.0n-hp-hpux11.00/2.95.2/specs
gcc version 2.95.2 19991024 (release)

$ uname -a
HP-UX ... B.11.11 U 9000/803 ...