[pptp-server] Failure in pptpgre.c compiling pptpd-1.1.2 under Solaris 7

[Arturo Pina]

Hi!
I'm trying to compile pptp-1.1.2 under Solaris 7. Compilation fails! Please
could someone help me?
Thanks a lot!

Arturo

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gcc -DHAVE_CONFIG_H -I. -I. -I. -I.    -O2 -fno-builtin -Wall -ansi -DSBINDI
R='"/usr/local/sbin"' -c pptpgre.c
pptpgre.c: In function `pptp_gre_init':
pptpgre.c:122: `SOL_IP' undeclared (first use in this function)
pptpgre.c:122: (Each undeclared identifier is reported only once
pptpgre.c:122: for each function it appears in.)
*** Error code 1
make: Fatal error: Command failed for target `pptpgre.o'