The fcntl call in the following code will produce an error#14 if it is compiled static under 32 bit FreeBSD and executed on FreeBSD 10.1 amd64
ie "Could not lock TestLock.TXT Error:14"
This code does not produce an error when run under FreeBSD 10.0 amd64
It does not produce an error if run under FreeBSD 10.1 i386
It does not product an error if compiled 64 bit and run under FreeBSD 10.1 amd64
I used FreeBSD 7.0 to compile the code with the following command:
cc testlock.c -otestlock -static

If I move the "struct flock oLock" out of the function and make it global by placing immediately prior to main after the stdio.h include the code works in all instances. There must be an issue with running i386 code when the struct is defined inside the function. All is ok when the struct is defined globally outside of the function.

#include <errno.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
int main(int iArgv, char** cpArgc)
{
        struct flock oLock;
        int iFile;
        iFile = open("TestLock.TXT",O_CREAT|O_RDWR,0666);
        if (iFile <= 0)
        {
                printf("Could not open TestLock.TXT Error:%d\r\n",errno);
                return 0;
        }
        oLock.l_type = F_WRLCK;
        oLock.l_whence = SEEK_SET;
        oLock.l_start = 0;
        oLock.l_len = 1;
        if (fcntl(iFile,F_SETLK,&oLock) < 0)
        {
                printf("Could not lock TestLock.TXT Error:%d\r\n",errno);
                return 0;
        }
        close(iFile);
        return 0;
}