1 files changed, 17 insertions, 6 deletions

diff --git a/newlib/libc/sys/linux/io.c b/newlib/libc/sys/linux/io.c
index c33461f14..d6731144a 100644
--- a/newlib/libc/sys/linux/io.c
+++ b/newlib/libc/sys/linux/io.c
@@ -21,9 +21,7 @@
 #define __NR___mknod __NR_mknod
 
 _syscall3(ssize_t,read,int,fd,void *,buf,size_t,count)
-_syscall3(ssize_t,readv,int,fd,const struct iovec *,vec,int,count)
 _syscall3(ssize_t,write,int,fd,const void *,buf,size_t,count)
-_syscall3(ssize_t,writev,int,fd,const struct iovec *,buf,int,count)
 _syscall3(int,open,const char *,file,int,flag,mode_t,mode)
 _syscall1(int,close,int,fd)
 _syscall3(off_t,lseek,int,fd,off_t,offset,int,count)
@@ -32,14 +30,20 @@ _syscall1(int,dup,int,fd)
 _syscall2(int,dup2,int,oldfd,int,newfd)
 _syscall3(int,fcntl,int,fd,int,cmd,long,arg)
 _syscall1(int,fdatasync,int,fd)
-_syscall2(int,ftruncate,int,fd,off_t,len)
-_syscall2(int,truncate,const char *,path,off_t,len)
 _syscall1(int,fsync,int,fd)
 _syscall3(int,poll,struct pollfd *,fds,nfds_t,nfds,int,timeout)
 
-static _syscall2(long,__flock,unsigned int,fd,unsigned int,cmd)
+#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2
+_syscall3(ssize_t,readv,int,fd,const struct iovec *,vec,int,count)
+_syscall3(ssize_t,writev,int,fd,const struct iovec *,buf,int,count)
+#endif
+
+#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 4
+_syscall2(int,ftruncate,int,fd,off_t,len)
+_syscall2(int,truncate,const char *,path,off_t,len)
+#endif
+
 static _syscall3(int,__ioctl,int,fd,int,request,void *,arg)
-static _syscall3(int,__mknod,const char *,path,mode_t,mode,dev_t *,dev)
 
 int ioctl(int fd,int request,...)
 {
@@ -52,16 +56,23 @@ int ioctl(int fd,int request,...)
     return res;
 }
 
+static _syscall2(long,__flock,unsigned int,fd,unsigned int,cmd)
+
 int flock(int fd,int operation)
 {
     return __flock(fd,operation);
 }
 
+#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 3
+
+static _syscall3(int,__mknod,const char *,path,mode_t,mode,dev_t *,dev)
+
 int mkfifo(const char *path, mode_t mode)
 {
    dev_t dev = 0;
    return __mknod(path, mode | S_IFIFO, &dev);
 }
+#endif
 
 weak_alias(__libc_close,__close);
 weak_alias(__libc_fcntl,__fcntl);