Error building Delegate Proxy 9.9.13 using G++ 11.2.0

Question

I applied the 2 patches mentioned by the original author of Delegate 9.9.13 but still encountered another build error as shown below. Could someone suggest a fix for such error. Thanks a lot.

The patches by the original author: Failed compile delegate Raspbian

cc -O2 -x c++ -DQS  -I../gen -I../include  -c conf.c \
        -DADMIN=\"python@dell-e7470\" \
        -DADMINPASS=\"\"
conf.c: In function ‘int myid_mainX(int, const char**, FILE*)’:
conf.c:1240:40: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
 1240 |                 int with_gethostbyname2();
      |                                        ^~
conf.c:1240:40: note: remove parentheses to default-initialize a variable
 1240 |                 int with_gethostbyname2();
      |                                        ^~
      |                                        --
conf.c:1240:40: note: or replace parentheses with braces to value-initialize a variable
cc -O2 -x c++ -DQS  -I../gen -I../include  -c svport.c
cc -O2 -x c++ -DQS  -I../gen -I../include  -c ddi.c
cc -O2 -x c++ -DQS  -I../gen -I../include  -c textconv.c
cc -O2 -x c++ -DQS  -I../gen -I../include  -c script.c
cc -O2 -x c++ -DQS  -I../gen -I../include  -c param.c
cc -O2 -x c++ -DQS  -I../gen -I../include  -c env.c
env.c: In function ‘void confCGI(Connection_01*, DYConf*, CLArg*, FILE*, const char*)’:
env.c:2083:15: error: ordered comparison of pointer with integer zero (‘int’ and ‘char*’)
 2083 |         if( 0 <= esock ){
      |             ~~^~~~~~~~
make[2]: *** [Makefile.go:754: env.o] Error 1
make[2]: Leaving directory '/home/python/delegate/src'
make[1]: *** [Makefile:376: start0] Error 2
make[1]: Leaving directory '/home/python/delegate/src'
mkmake: ERROR LOG is left at /home/python/delegate/src/mkmake.err
mkmake: ERROR LOG is left at /home/python/delegate/src/mkmake.err
make: *** [Makefile:77: all] Error 2