Config: select PLATFORM_LINUX if using sendfile()

Man entry for sendfile:

  Not specified in POSIX.1-2001, or other standards.

  Other UNIX systems implement sendfile() with different  semantics  and
  prototypes. It should not be used in portable programs.

Select PLATFORM_LINUX if enabling FEATURE_USE_SENDFILE.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/Config.in b/Config.in
index 285fe0a19..07b4bf36b 100644
--- a/Config.in
+++ b/Config.in
@@ -267,6 +267,7 @@ config PAM
 config FEATURE_USE_SENDFILE
         bool "Use sendfile system call"
         default y
+        select PLATFORM_LINUX
         help
           When enabled, busybox will use the kernel sendfile() function
           instead of read/write loops to copy data between file descriptors