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/miscutils/readahead.c b/miscutils/readahead.c
index cc0ba5ba3..d2bed2092 100644
--- a/miscutils/readahead.c
+++ b/miscutils/readahead.c
@@ -13,7 +13,6 @@
 //config:       bool "readahead (1.5 kb)"
 //config:       default y
 //config:       depends on LFS
-//config:       select PLATFORM_LINUX
 //config:       help
 //config:       Preload the files listed on the command line into RAM cache so that
 //config:       subsequent reads on these files will not block on disk I/O.