From: Rob Landley <rob@landley.net>
Date: Sun, 31 Jul 2005 04:25:00 +0000 (-0000)
Subject: Fix "nm --size-sort" on the busybox binary and document how to make it work.
X-Git-Tag: 1_1_0~854
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=c7a3e1be8fe22b271193840a5b6bdde93da147ae;p=oweals%2Fbusybox.git

Fix "nm --size-sort" on the busybox binary and document how to make it work.
---

diff --git a/Rules.mak b/Rules.mak
index 73adf80a0..66edaca9f 100644
--- a/Rules.mak
+++ b/Rules.mak
@@ -169,7 +169,7 @@ ifeq ($(strip $(CONFIG_DEBUG)),y)
     STRIPCMD:=/bin/true -Not_stripping_since_we_are_debugging
 else
     CFLAGS+=$(WARNINGS) $(OPTIMIZATIONS) -D_GNU_SOURCE -DNDEBUG
-    LDFLAGS += -s -Wl,-warn-common
+    LDFLAGS += -Wl,-warn-common
     STRIPCMD:=$(STRIP) --remove-section=.note --remove-section=.comment
 endif
 ifeq ($(strip $(CONFIG_STATIC)),y)
diff --git a/docs/busybox.net/FAQ.html b/docs/busybox.net/FAQ.html
index a2264f9fe..a2d20bf5c 100644
--- a/docs/busybox.net/FAQ.html
+++ b/docs/busybox.net/FAQ.html
@@ -246,68 +246,33 @@ have additions to this FAQ document, we would love to add them,
     trust PayPal...
 
 <hr />
+<p>
+<h2><a name="optimize">I want to make busybox even smaller, how do I go about it?</a></h2>
+<p>
+	To conserve bytes it's good to know where they're being used, and the
+	size of the final executable isn't always a reliable indicator of
+	the size of the components (since various structures are rounded up,
+	so a small change may not even be visible by itself, but many small
+	savings add up).
+</p>
+<p>
+	To examine a busybox binary with an eye to saving bytes, build an
+	optimized debug version and run the "nm" command against it, like so:
+</p>
+<p>
+	make clean && make STRIPCMD=/bin/true && nm --size-sort busybox
+</p>
+<p>
+	This gives a list of symbols and the amount of space allocated for
+	each one, sorted by size.  (Note: do not enable CONFIG_DEBUG for this,
+	as that disables compiler optimization which is great for running gdb
+	but misleading when trying to figure out how much space each component
+	is really using under normal circumstances.)
+</p>
+<hr />
+
+
 
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