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| author | Rob Landley <rob@landley.net> | 2005-08-13 01:10:27 +0000 |
|---|---|---|
| committer | Rob Landley <rob@landley.net> | 2005-08-13 01:10:27 +0000 |
| commit | be3dae145f71b583f2c975d8dcdc10d9dad2268a (patch) | |
| tree | 4bcd50be61a1945e41eabd59d645d398fc038522 /busybox/docs | |
| parent | 6022fc8723c4bfaf055011db33f69565fa0c82b1 (diff) | |
| download | busybox-w32-be3dae145f71b583f2c975d8dcdc10d9dad2268a.tar.gz busybox-w32-be3dae145f71b583f2c975d8dcdc10d9dad2268a.tar.bz2 busybox-w32-be3dae145f71b583f2c975d8dcdc10d9dad2268a.zip | |
Makefile related backports:
10945, 10946 Make compile much, much faster.
10923 big makefile change. Nervous.
10946, 10991, 10998, 11003 small makefile fixes.
Diffstat (limited to 'busybox/docs')
| -rw-r--r-- | busybox/docs/busybox.net/FAQ.html | 87 |
1 files changed, 26 insertions, 61 deletions
diff --git a/busybox/docs/busybox.net/FAQ.html b/busybox/docs/busybox.net/FAQ.html index a9324ae26..8de06e632 100644 --- a/busybox/docs/busybox.net/FAQ.html +++ b/busybox/docs/busybox.net/FAQ.html | |||
| @@ -254,68 +254,33 @@ have additions to this FAQ document, we would love to add them, | |||
| 254 | trust PayPal... | 254 | trust PayPal... |
| 255 | 255 | ||
| 256 | <hr /> | 256 | <hr /> |
| 257 | <p> | ||
| 258 | <h2><a name="optimize">I want to make busybox even smaller, how do I go about it?</a></h2> | ||
| 259 | <p> | ||
| 260 | To conserve bytes it's good to know where they're being used, and the | ||
| 261 | size of the final executable isn't always a reliable indicator of | ||
| 262 | the size of the components (since various structures are rounded up, | ||
| 263 | so a small change may not even be visible by itself, but many small | ||
| 264 | savings add up). | ||
| 265 | </p> | ||
| 266 | <p> | ||
| 267 | To examine a busybox binary with an eye to saving bytes, build an | ||
| 268 | optimized debug version and run the "nm" command against it, like so: | ||
| 269 | </p> | ||
| 270 | <p> | ||
| 271 | make clean && make STRIPCMD=/bin/true && nm --size-sort busybox | ||
| 272 | </p> | ||
| 273 | <p> | ||
| 274 | This gives a list of symbols and the amount of space allocated for | ||
| 275 | each one, sorted by size. (Note: do not enable CONFIG_DEBUG for this, | ||
| 276 | as that disables compiler optimization which is great for running gdb | ||
| 277 | but misleading when trying to figure out how much space each component | ||
| 278 | is really using under normal circumstances.) | ||
| 279 | </p> | ||
| 280 | <hr /> | ||
| 281 | |||
| 282 | |||
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