build system: drop PLATFORM_LINUX

PLATFORM_LINUX is a hidden configuration option which is disabled by
default and enabled at over a hundred locations for features that are
deemed to be Linux specific.

The only effect of PLATFORM_LINUX is to control compilation of
libbb/match_fstype.c.  This file is only needed by mount and umount.

Remove all references to PLATFORM_LINUX and compile match_fstype.c
if mount or umount is enabled.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/coreutils/date.c b/coreutils/date.c
index b9b7fd2cb..d84e1c31a 100644
--- a/coreutils/date.c
+++ b/coreutils/date.c
@@ -37,7 +37,6 @@
 //config:       bool "Support %[num]N nanosecond format specifier"
 //config:       default n # stat's nanosecond field is a bit non-portable
 //config:       depends on DATE
-//config:       select PLATFORM_LINUX
 //config:       help
 //config:       Support %[num]N format specifier. Adds ~250 bytes of code.
 //config: