[RFC PATCH u-boot 00/12] U-Boot LTO (Sandbox + ARM Nokia RX-51)

[Pali Rohár]

On Saturday 06 March 2021 21:54:00 Marek Behun wrote:
> On Sat, 6 Mar 2021 21:41:14 +0100
> Pali Rohár <pali at kernel.org> wrote:
> 
> > On Saturday 06 March 2021 15:08:13 Tom Rini wrote:
> > > Perhaps we'll default to yes on some SoCs.  The omap3 thing is a bit
> > > odd, but we'll see what happens on real N900 hardware.  
> > 
> > Hello!
> > 
> > Could you send me a link to git repo / branch and tell me from which
> > commit should I do tests on real N900 hardware? I will test it and let
> > you know results.
> > 
> > Adding maemo ML to the loop as on the maemo list are more people with
> > N900 HW and U-Boot.
> 
> https://github.com/elkablo/u-boot branch lto

Sorry, compilation is failing :-(

$ git clone https://github.com/elkablo/u-boot -b lto --depth=100
Cloning into 'u-boot'...
remote: Enumerating objects: 33644, done.
remote: Counting objects: 100% (33644/33644), done.
remote: Compressing objects: 100% (20116/20116), done.
remote: Total 33644 (delta 15838), reused 19947 (delta 13018), pack-reused 0
Receiving objects: 100% (33644/33644), 26.28 MiB | 10.21 MiB/s, done.
Resolving deltas: 100% (15838/15838), done.

$ cd u-boot

$ make CROSS_COMPILE=arm-linux-gnueabi- nokia_rx51_config
  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/kconfig/conf.o
  YACC    scripts/kconfig/zconf.tab.c
  LEX     scripts/kconfig/zconf.lex.c
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/conf
#
# configuration written to .config
#

$ make CROSS_COMPILE=arm-linux-gnueabi- u-boot.bin
...
  LTO     u-boot
/usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld: /usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld: DWARF error: offset (1258291444) greater than or equal to .debug_str size (676)
/usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld: DWARF error: offset (1459618036) greater than or equal to .debug_str size (676)
/usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld: DWARF error: could not find abbrev number 48028
/tmp/cc8l0QSQ.ltrans3.ltrans.o: in function `omap3_set_aux_cr_secure':
<artificial>:(.text+0x6eb8): undefined reference to `do_omap3_emu_romcode_call'
collect2: error: ld returned 1 exit status
make: *** [Makefile:1808: u-boot] Error 1


I'm using arm-linux-gnueabi-gcc version 8.3.0 which is available in
current Debian stable (Debian 10 Buster).