Solaris cc to a Linux gcc 컴파일 오류

안녕하세요? 궁금한게 있어서 질문 드립니다.
기존 SPARC Solaris 환경에서 컴파일하여 사용하던
오래된 c소스를 x86 64bit linux 머신의 gcc 환경으로 변경 컴파일 하려고 합니다.

Linux 머신에서 아래와 같이 gcc를 사용하여 컴파일 하려고 하면 struct in_addr 부분에서
에러가 나는것 같은데 어떤 에러인지 아시는분 계실까요?

# gcc -g -m64 -D_REENTRANT -D_SOL10 -I./ -I/usr/include -I/usr/local/include -g -m64 -L/usr/lib -lrt -lnsl -lsocket -lpthread -o watchdog watchdog.c logger.c unisock.c conf.c common.c unicrypt.c aes.c seed.c base64.c

In file included from common.h:12,
from watchdog.c:13:
unisock.h:15: warning: ‘struct in_addr’ declared inside parameter list
unisock.h:18: warning: ‘struct in_addr’ declared inside parameter list
unisock.h:22: warning: ‘struct in_addr’ declared inside parameter list
In file included from watchdog.c:15:
unisock.h:15: warning: ‘struct in_addr’ declared inside parameter list
unisock.h:15: error: conflicting types for ‘PsSocketBind’
unisock.h:15: note: previous declaration of ‘PsSocketBind’ was here
unisock.h:18: warning: ‘struct in_addr’ declared inside parameter list
unisock.h:18: error: conflicting types for ‘PsSocketConnect’
unisock.h:18: note: previous declaration of ‘PsSocketConnect’ was here
unisock.h:22: warning: ‘struct in_addr’ declared inside parameter list
unisock.h:22: error: conflicting types for ‘PsSocketAccept’
unisock.h:22: note: previous declaration of ‘PsSocketAccept’ was here
watchdog.c: In function ‘main’:
watchdog.c:138: warning: cast to pointer from integer of different size
In file included from unicrypt.c:19:
seed.h:43:1: warning: "LITTLE_ENDIAN" redefined
In file included from /usr/include/bits/waitstatus.h:65,
from /usr/include/stdlib.h:43,
from seed.h:13,
from unicrypt.c:19:
/usr/include/endian.h:46:1: warning: this is the location of the previous definition
In file included from seed.c:12:
seed.h:43:1: warning: "LITTLE_ENDIAN" redefined
In file included from /usr/include/bits/waitstatus.h:65,
from /usr/include/stdlib.h:43,
from seed.h:13,
from seed.c:12:
/usr/include/endian.h:46:1: warning: this is the location of the previous definition

unisock.h 파일은 아래와 같이 정의 되어 있습니다.
또한 혹시 몰라 프로젝트 파일의 최소 내용[민감 정보 제외 또는 대체]을 압축하여 첨부합니다.
아시는 분이 계시면 도움 부탁드립니다. 감사합니다.

#define _BSD 44
 
int PsSocketCreate(int *sockfd);
int PsSocketClose(int *sockfd);
int PsSocketBind(int sockfd, unsigned short* Port, struct in_addr *Address);
int PsSocketBindByName(int sockfd, unsigned short *Port, char *LocalName);
int PsSocketBindByIP(int sockfd, unsigned short *Port, char *LocalIP);
int PsSocketConnect(int sockfd, struct in_addr *Address, unsigned short Port);
int PsSocketConnectByName(int sockfd, char *RemoteName, unsigned short Port);
int PsSocketConnectByIP(int sockfd, char *RemoteIP, unsigned short Port);
int PsSocketListen(int sockfd, int nBackLog);
int PsSocketAccept(int svrsock, int *clisock, unsigned short *Port, struct in_addr *Address);
int PsSocketAcceptByName(int svrsock, int *clisock, unsigned short *Port, char *RemoteName);
int PsSocketSend(int sockfd, char *Buf, int BufLen);
int PsSocketReceiveN(int sockfd, char *Buf, int *BufLen, int Time);
void PsSocketClear(int *sockfd, int nCurLen, char *szTotLen);