busybox: update to version 1.25.0

[openwrt/staging/rmilecki.git] / package / utils / busybox / config / libbb / Config.in

diff --git a/package/utils/busybox/config/libbb/Config.in b/package/utils/busybox/config/libbb/Config.in
index e66a15b6922ff65aacc2941645d7fb9db1daa87d..0695f9ba39eddd1f1df6f78b643a6c10d275178c 100644 (file)
--- a/package/utils/busybox/config/libbb/Config.in
+++ b/package/utils/busybox/config/libbb/Config.in
@@ -6,14 +6,38 @@
 
 menu "Busybox Library Tuning"
 
-config BUSYBOX_CONFIG_FEATURE_SYSTEMD
-       bool "Enable systemd support"
-       default BUSYBOX_DEFAULT_FEATURE_SYSTEMD
-       help
-         If you plan to use busybox daemons on a system where daemons
-         are controlled by systemd, enable this option.
-         If you don't use systemd, it is still safe to enable it,
-         but the downside is increased code size.
+config BUSYBOX_CONFIG_FEATURE_USE_BSS_TAIL
+       bool "Use the end of BSS page"
+       default BUSYBOX_DEFAULT_FEATURE_USE_BSS_TAIL
+       help
+         Attempt to reclaim a small unused part of BSS.
+
+         Executables have the following parts:
+         = read-only executable code and constants, also known as "text"
+         = read-write data
+         = non-initialized (zeroed on demand) data, also known as "bss"
+
+         At link time, "text" is padded to a full page. At runtime, all "text"
+         pages are mapped RO and executable.
+         "Data" starts on the next page boundary, but is not padded
+         to a full page at the end. "Bss" starts wherever "data" ends.
+         At runtime, "data" pages are mapped RW and they are file-backed
+         (this includes a small portion of "bss" which may live in the last
+         partial page of "data").
+         Pages which are fully in "bss" are mapped to anonymous memory.
+
+         "Bss" end is usually not page-aligned. There is an unused space
+         in the last page. Linker marks its start with the "_end" symbol.
+
+         This option will attempt to use that space for bb_common_bufsiz1[]
+         array. If it fits after _end, it will be used, and COMMON_BUFSIZE
+         will be enlarged from its guaranteed minimum size of 1 kbyte.
+         This may require recompilation a second time, since value of _end
+         is known only after final link.
+
+         If you are getting a build error like this:
+               appletlib.c:(.text.main+0xd): undefined reference to '_end'
+         disable this option.
 config BUSYBOX_CONFIG_FEATURE_RTMINMAX
        bool "Support RTMIN[+n] and RTMAX[-n] signal names"
        default BUSYBOX_DEFAULT_FEATURE_RTMINMAX
@@ -30,7 +54,7 @@ config BUSYBOX_CONFIG_PASSWORD_MINLEN
 
 config BUSYBOX_CONFIG_MD5_SMALL
        int "MD5: Trade bytes for speed (0:fast, 3:slow)"
-       default BUSYBOX_DEFAULT_MD5_SMALL
+       default BUSYBOX_DEFAULT_MD5_SMALL  # all "fast or small" options default to small
        range 0 3
        help
          Trade binary size versus speed for the md5sum algorithm.
@@ -44,7 +68,7 @@ config BUSYBOX_CONFIG_MD5_SMALL
 
 config BUSYBOX_CONFIG_SHA3_SMALL
        int "SHA3: Trade bytes for speed (0:fast, 1:slow)"
-       default BUSYBOX_DEFAULT_SHA3_SMALL
+       default BUSYBOX_DEFAULT_SHA3_SMALL  # all "fast or small" options default to small
        range 0 1
        help
          Trade binary size versus speed for the sha3sum algorithm.
@@ -54,7 +78,7 @@ config BUSYBOX_CONFIG_SHA3_SMALL
 
 config BUSYBOX_CONFIG_FEATURE_FAST_TOP
        bool "Faster /proc scanning code (+100 bytes)"
-       default BUSYBOX_DEFAULT_FEATURE_FAST_TOP
+       default BUSYBOX_DEFAULT_FEATURE_FAST_TOP  # all "fast or small" options default to small
        help
          This option makes top (and ps) ~20% faster (or 20% less CPU hungry),
          but code size is slightly bigger.
@@ -128,7 +152,7 @@ config BUSYBOX_CONFIG_FEATURE_EDITING_SAVE_ON_EXIT
 config BUSYBOX_CONFIG_FEATURE_REVERSE_SEARCH
        bool "Reverse history search"
        default BUSYBOX_DEFAULT_FEATURE_REVERSE_SEARCH
-       depends on BUSYBOX_CONFIG_FEATURE_EDITING_SAVEHISTORY
+       depends on BUSYBOX_CONFIG_FEATURE_EDITING
        help
          Enable readline-like Ctrl-R combination for reverse history search.
          Increases code by about 0.5k.