libbb: don't build useless functions

The functions ndelay_on(), ndelay_off() and close_on_exec_on()
don't do anything useful because our fcntl(2) implementation
doesn't support the features they require.

Replace them with stubs.

Saves 176-208 bytes.

1 files changed, 2 insertions, 0 deletions

diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index cbeb24701..813985194 100644
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -23,6 +23,7 @@
 #include "libbb.h"
 
 /* Turn on nonblocking I/O on a fd */
+#if !ENABLE_PLATFORM_MINGW32
 int FAST_FUNC ndelay_on(int fd)
 {
         int flags = fcntl(fd, F_GETFL);
@@ -45,6 +46,7 @@ void FAST_FUNC close_on_exec_on(int fd)
 {
         fcntl(fd, F_SETFD, FD_CLOEXEC);
 }
+#endif
 
 char* FAST_FUNC strncpy_IFNAMSIZ(char *dst, const char *src)
 {