I cannot comile  delegate6.1.7 on Solaris 2.5/SPARC:
# make

####### -makeat: /new/distr/ftpproxies/delegate/delegate6.1.7/src
/new/distr/ftpproxies/delegate/delegate6.1.7/mkmake    -makeat
../lib/library.a
../rary     library.a     "make" libx MAKE="make" SHELL="/bin/sh"  CC="cc"
CFLAG
S="-O " HDRDIR="-I../include"  RANLIB="/usr/local/bin/ranlib"
LDFLAGS=" -L../lib
" LIBDIR="-L../lib"  NETLIB="-lnsl -lsocket"  TAR="tar"

####### -makeat: /new/distr/ftpproxies/delegate/delegate6.1.7/rary
/usr/ccs/bin/make -f Makefile.go CFLAGS="-O" library.a SHELL="/bin/sh"
HDRDIR="-
I../include"
cc -O -I../include -c signal.c
signal.c: In function `BSDsignal':
signal.c:37: storage size of `sa' isn't known
*** Error code 1
make: Fatal error: Command failed for target `signal.o'
Current working directory /new/distr/ftpproxies/delegate/delegate6.1.7/rary
*** Error code 1
make: Fatal error: Command failed for target `libx'
Current working directory /new/distr/ftpproxies/delegate/delegate6.1.7/rary
mkmake: ERROR LOG is left at
/new/distr/ftpproxies/delegate/delegate6.1.7/rary/m
kmake.err
mkmake: ERROR LOG is left at
/new/distr/ftpproxies/delegate/delegate6.1.7/rary/m
kmake.err
*** Error code 1
make: Fatal error: Command failed for target `../lib/library.a'
Current working directory /new/distr/ftpproxies/delegate/delegate6.1.7/src
*** Error code 1
make: Fatal error: Command failed for target `start0'
Current working directory /new/distr/ftpproxies/delegate/delegate6.1.7/src
mkmake: ERROR LOG is left at
/new/distr/ftpproxies/delegate/delegate6.1.7/src/mk
make.err
mkmake: ERROR LOG is left at
/new/distr/ftpproxies/delegate/delegate6.1.7/src/mk
make.err
*** Error code 1
make: Fatal error: Command failed for target `all'