Complilng VPNC

I'm trying to connect an Solaris 10 x86 system to a Cisco VPN. Most of what I
found suggests using VPNC. However I cannot get it to compile. I've installed
the Blastware stuff (gcc 3.4.3, binutils, libgcrypt, libgcrypt, intltool,
libiconv, gmake) but I get errors such as:

gcc -O3 -g -W -Wall -Wmissing-declarations -Wwrite-strings
-DVERSION=\"0.5.1\" -c -o sysdep.o sysdep.c
gcc -O3 -g -W -Wall -Wmissing-declarations -Wwrite-strings
-DVERSION=\"0.5.1\" -c -o vpnc-debug.o vpnc-debug.c
gcc -O3 -g -W -Wall -Wmissing-declarations -Wwrite-strings
-DVERSION=\"0.5.1\" -c -o isakmp-pkt.o isakmp-pkt.c
In file included from isakmp-pkt.c:31:
math_group.h:62: error: syntax error before "gcry_mpi_t"
math_group.h:62: warning: no semicolon at end of struct or union
math_group.h:63: warning: type defaults to `int' in declaration of `p'
math_group.h:63: warning: data definition has no type or storage class
math_group.h:64: error: syntax error before "a"
math_group.h:64: warning: type defaults to `int' in declaration of `a'
math_group.h:64: warning: type defaults to `int' in declaration of `b'
math_group.h:64: warning: type defaults to `int' in declaration of `c'
math_group.h:64: warning: type defaults to `int' in declaration of `d'
math_group.h:64: warning: data definition has no type or storage class
math_group.h:65: error: syntax error before '}' token
In file included from vpnc.h:24,
from isakmp-pkt.c:32:
tunip.h:43: error: syntax error before "gcry_cipher_hd_t"
tunip.h:43: warning: no semicolon at end of struct or union
tunip.h:50: error: syntax error before '}' token
tunip.h:111: error: field `rx' has incomplete type
tunip.h:111: error: field `tx' has incomplete type
gmake: *** [isakmp-pkt.o] Error 1

Has someone gotten this beast to compile or should I just go with openvpn?
The
reason I'm trying VPNC is that there are utilities to convert Cisco PCF files
and searches indicate that once it is compiled it works really well with
Cisco. (Unfortunately Cisco does not have a Solaris x86 VPN client.)


JC

PS: J and C are my initials, look at the email address.
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