build system: FEATURE_LIBBUSYBOX_STATIC - try to pull libc/libm into libbusybox

It variously fails with different toolchains I tried...

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 20 insertions, 23 deletions

diff --git a/Config.in b/Config.in
index cfb3aa0ee..82baed50a 100644
--- a/Config.in
+++ b/Config.in
@@ -386,29 +386,26 @@ config BUILD_LIBBUSYBOX
           Build a shared library libbusybox.so.N.N.N which contains all
           busybox code.
 
-          This feature allows every applet to be built as a tiny
-          separate executable. Enabling it for "one big busybox binary"
-          approach serves no purpose and increases code size.
-          You should almost certainly say "no" to this.
-
-### config FEATURE_FULL_LIBBUSYBOX
-###     bool "Feature-complete libbusybox"
-###     default n if !FEATURE_SHARED_BUSYBOX
-###     depends on BUILD_LIBBUSYBOX
-###     help
-###       Build a libbusybox with the complete feature-set, disregarding
-###       the actually selected config.
-###
-###       Normally, libbusybox will only contain the features which are
-###       used by busybox itself. If you plan to write a separate
-###       standalone application which uses libbusybox say 'Y'.
-###
-###       Note: libbusybox is GPL, not LGPL, and exports no stable API that
-###       might act as a copyright barrier. We can and will modify the
-###       exported function set between releases (even minor version number
-###       changes), and happily break out-of-tree features.
-###
-###       Say 'N' if in doubt.
+          This feature allows every applet to be built as a really tiny
+          separate executable linked against the library:
+
+          $ size 0_lib/l*
+            text  data   bss     dec    hex filename
+             939   212    28    1179    49b 0_lib/last
+             939   212    28    1179    49b 0_lib/less
+          919138  8328  1556  929022  e2cfe 0_lib/libbusybox.so.1.N.M
+
+          This is useful on NOMMU systems which are not capable
+          of sharing executables, but are capable of sharing code
+          in dynamic libraries.
+
+config FEATURE_LIBBUSYBOX_STATIC
+        bool "Pull in all external references into libbusybox"
+        default n
+        depends on BUILD_LIBBUSYBOX
+        help
+          Make libbusybox library independent, not using or requiring
+          any other shared libraries.
 
 config FEATURE_INDIVIDUAL
         bool "Produce a binary for each applet, linked against libbusybox"