--- runtime/Clib/cports.c.orig	2018-01-26 02:50:11.000000000 -0700

+++ runtime/Clib/cports.c	2018-01-26 21:21:28.826703643 -0700

@@ -158,7 +158,7 @@ static int posix_close( FILE *f ) {

 }

 static ssize_t posix_read( FILE *f, void *buf, size_t count ) {

-   int n = fread( buf, 1, count, f );

+   size_t n = fread( buf, 1, count, f );

    if( n != 0 )

       return n;

@@ -174,9 +174,9 @@ static ssize_t posix_read( FILE *f, void

 /*    BSD compatibility kit                                            */

 /*---------------------------------------------------------------------*/

 #if( BGL_HAVE_SENDFILE && ( BGL_SENDFILE_BRAND == BGL_SENDFILE_BSD ) )

-static int bsd_sendfile(int out_fd, int in_fd, off_t *offset, size_t count) {

+static ssize_t bsd_sendfile(int out_fd, int in_fd, off_t *offset, size_t count) {

    off_t sz = count;

-   int n = sendfile( in_fd, out_fd, offset ? *offset : 0, &sz, 0, 0 );

+   ssize_t n = sendfile( in_fd, out_fd, offset ? *offset : 0, &sz, 0, 0 );

    return n ? n : sz;

 }

@@ -2262,7 +2262,7 @@ bgl_file_to_string( char *path ) {

 	 return 0L;

       } else {

 	 obj_t res = make_string_sans_fill( sin.st_size );

-	 int n = read( fd, BSTRING_TO_STRING( res ), sin.st_size );

+	 ssize_t n = read( fd, BSTRING_TO_STRING( res ), sin.st_size );

 	 close( fd );

@@ -2551,7 +2551,7 @@ bgl_sendchars( obj_t ip, obj_t op, long

       }

 #if( BGL_HAVE_SENDFILE )

    } else {

-      if( sz == -1 ) sz = in.st_size;

+      if( sz == -1 ) sz = (long) in.st_size;

       if( sz != 0 ) {

 #if( BGL_GC_HAVE_BLOCKING )

@@ -2661,7 +2661,7 @@ bgl_sendfile( obj_t name, obj_t op, long

 	 C_SYSTEM_FAILURE(

 	    BGL_IO_PORT_ERROR, "send-file", strerror( errno ), name );

       }

-      sz = sin.st_size;

+      sz = (long) sin.st_size;

    }

 #if( !BGL_HAVE_SENDFILE )