mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
2178817c4a
U-Boot is a bit special piese of software because it is being
only executed once on power-on as compared to operating system
for example. That's why we don't care much about performance
optimizations instead we're more concerned about size. And up-to-date
compilers might produce much smaller code compared to
performance-optimized routines copy-pasted from the Linux kernel.
Here's an example:
------------------------------->8--------------------------
--- size_asm_strings.txt
+++ size_c_strings.txt
@@ -1,2 +1,2 @@
text data bss dec hex filename
- 121260 3784 3308 128352 1f560 u-boot
+ 120448 3784 3308 127540 1f234 u-boot
------------------------------->8--------------------------
See we were able to shave off ~800 bytes of .text section.
Also usage of string routines implemented in C gives us an ability
to support more HW flavors for free: generated instructions will match
our target as long as correct compiler option is used.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
20 lines
377 B
Makefile
20 lines
377 B
Makefile
#
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# Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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extra-y = start.o
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head-y := start.o
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obj-y += cache.o
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obj-y += cpu.o
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obj-y += interrupts.o
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obj-y += relocate.o
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obj-y += reset.o
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obj-y += ints_low.o
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obj-y += init_helpers.o
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obj-$(CONFIG_CMD_BOOTM) += bootm.o
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lib-$(CONFIG_USE_PRIVATE_LIBGCC) += _millicodethunk.o libgcc2.o
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