Pro*C program run properly in AIX but not in RHEL - compilation

Question

I have some trouble running a binary done with proC code. I can compile it (without warnings) in my new server RHEL (7.8) but it loops until it failed. I made a simple proC script to test the compilation (see below). This script runs easily in my previous server AIX (6.1.0.0). The DB is Oracle 11c.
Oracle client in AIX : .../oracle/10.2
Oracle client in RHEL : .../oracle/12102/cli64
Here my simple code I want to compile and execute :
#include "demo.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sqlca.h>
#include <oraca.h>
int code_erreur;
char libelle_erreur[200];
EXEC ORACLE OPTION (ORACA=YES);
EXEC SQL BEGIN DECLARE SECTION;
VARCHAR username[30];
VARCHAR password[30];
VARCHAR host[30];
VARCHAR dynstmt[80];
VARCHAR mData[81];
EXEC SQL END DECLARE SECTION;
int connect()
{
printf("\nConnection to %s#%s\n",username.arr,host.arr);
EXEC SQL CONNECT :username IDENTIFIED BY :password USING :host;
printf("Connection established\n");
return 0;
}
void sqlerr()
{
code_erreur = sqlca.sqlcode;
strcpy(libelle_erreur,sqlca.sqlerrm.sqlerrmc);
printf("SQL ERROR : %d,%s ;\n", code_erreur,libelle_erreur);
printf("sqlca.sqlerrd : %d\n",sqlca.sqlerrd[2]);
}
int loadData()
{
int lIter;
strcpy(dynstmt.arr, "SELECT BANNER FROM V$VERSION\n");
dynstmt.len = strlen(dynstmt.arr);
printf("%s", (char *)dynstmt.arr);
EXEC SQL PREPARE S FROM :dynstmt;
EXEC SQL DECLARE lCursorData CURSOR FOR S;
EXEC SQL OPEN lCursorData;
for (lIter=0;lIter<10;lIter++)
{
EXEC SQL WHENEVER NOT FOUND DO break;
EXEC SQL FETCH lCursorData INTO :mData;
printf("%s\n", mData.arr);
}
EXECL SQL CLOSE lCursorData;
return 0;
}
void main()
{
int lRetour=0;
printf("Start demo\n");
strcpy((char *)username.arr,"USER");
username.len=(unsigned short)strlen((char *)username.arr);
strcpy((char *)password.arr,"PASS");
password.len=(unsigned short)strlen((char *)password.arr);
strcpy((char *)host.arr,"HOST");
host.len=(unsigned short)strlen((char *)host.arr);
EXEC SQL WHENEVER SQLERROR do sqlerr();
lRetour = connect();
lRetour = loadData();
EXEC SQL COMMIT WORK RELEASE;
printf("End demo\n");
exit(0);
}
When I compile it and execute it on my AIX server, here what I got :
Start demo
Connection to USER#HOST
Connection established
SELECT BANNER FROM V$VERSION
[...]
End demo
But when I compile it on RHEL and execute it, the binary loops until a memory fault :
[...]
Connection to USER#HOST
Connection to USER#HOST
Connection to USER#HOST
Memory fault
Of course I want the same AIX result in RHEL.

Answer 1

Your connect function should be defined as static, otherwize it replaces connect(2) library function from libc.
## -20,7 +20,7 ##
EXEC SQL END DECLARE SECTION;
-int connect()
+static int connect()
{
printf("\nConnection to %s#%s\n",username.arr,host.arr);
## -57,7 +57,7 ##