Messages in this thread | | | From | Rob Landley <> | Subject | Re: [PATCH] Configure out DMI scanning code v2 (Linux Tiny) | Date | Tue, 1 Apr 2008 15:09:28 -0500 |
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On Tuesday 01 April 2008 14:00:36 Andrew Morton wrote: > text data bss dec hex filename > 1614279 210524 159992 1984795 1e491b vmlinux > > but when I remove the ifdefs around the tables and rely on the compiler > removing the code and data I get > > text data bss dec hex filename > 1614447 210972 159992 1985411 1e4b83 vmlinux > > An additional 616 bytes of useless stuff. > > Ingo, I think there was some trick to making this work right. Do you > recall?
Does bloat-o-meter say what the additional 616 bytes _is_?
scripts/bloat-o-meter vmlinux.old vmlinux.new
P.S. What busybox did:
ifneq ($(strip $(CONFIG_DEBUG)),y) OPTIMIZATION+=$(call check_cc, $(CC),-ffunction-sections -fdata-sections,) CHECKED_LDFLAGS += $(call check_ld,$(LD),--gc-sections,) endif
Tells gcc to put each function and each global into its own ELF section, and then told the linker to garbage collect unused sections...
Rob -- "One of my most productive days was throwing away 1000 lines of code." - Ken Thompson.
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