On Sat, Mar 19, 2022 at 06:27:38PM +0100, Michael Nazzareno Trimarchi wrote: > Hi > > On Sat, Mar 19, 2022 at 6:25 PM Tom Rini <tr...@konsulko.com> wrote: > > > > On Sat, Mar 19, 2022 at 06:08:18PM +0100, Michael Nazzareno Trimarchi wrote: > > > Hi Tom > > > > > > On Sat, Mar 19, 2022 at 6:03 PM Tom Rini <tr...@konsulko.com> wrote: > > > > > > > > On Sat, Mar 19, 2022 at 05:48:59PM +0100, Michael Nazzareno Trimarchi > > > > wrote: > > > > > Hi Tom > > > > > > > > > > On Sat, Mar 19, 2022 at 5:05 PM Tom Rini <tr...@konsulko.com> wrote: > > > > > > > > > > > > On Sat, Mar 19, 2022 at 02:51:01PM +0100, Michael Nazzareno > > > > > > Trimarchi wrote: > > > > > > > Hi > > > > > > > > > > > > > > On Sat, Mar 19, 2022 at 2:25 PM Fabio Estevam > > > > > > > <feste...@gmail.com> wrote: > > > > > > > > > > > > > > > > Hi Michael, > > > > > > > > > > > > > > > > On Sat, Mar 19, 2022 at 6:47 AM Michael Nazzareno Trimarchi > > > > > > > > <mich...@amarulasolutions.com> wrote: > > > > > > > > > > > > > > > > > > HI > > > > > > > > > > > > > > > > > > Please send me a link to apply your series > > > > > > > > > > > > > > > > You can get the series from patchwork (just click in the > > > > > > > > 'series' button) > > > > > > > > https://patchwork.ozlabs.org/project/uboot/patch/20220112133127.16880-2-gaurav.j...@nxp.com/ > > > > > > > > > > > > > > Done, well, I have tried remove DM_GPIO in SPL. Seems that I need > > > > > > > to > > > > > > > remove a lot of features. I have tested LTO build but size > > > > > > > of SPL increase. Is that strange? > > > > > > > > > > > > That is very strange. Can you post your patches somewhere? > > > > > > > > > > > > -- > > > > > > Tom > > > > > > > > > > Start from here 9776c4e9d00ac49d6388ffe9e084ff03b37ae479 > > > > > export ARCH=arm > > > > > export CROSS_COMPILE=arm-linux-gnueabihf- > > > > > > > > > > make imx6dl_mamoj_defconfig > > > > > build it > > > > > > > > > > Try then to enable LTO and build it again > > > > > > > > > > spl/u-boot-spl.bin exceeds file size limit: > > > > > limit: 0xefa0 bytes > > > > > actual: 0xf071 bytes > > > > > excess: 0xd1 bytes > > > > > > > > > > So LTO does not help even on beginning on this board. You don't need > > > > > to apply any patch for this test > > > > > > > > I think that's some artifact of mixing LTO/non-LTO and the world not > > > > getting rebuilt? Just enabling LTO after the defconfig works fine and > > > > is smaller than before. > > > > > > In order to save space I did not change what we have. Every build starts > > > from > > > a mrproper and new configuration. I can not mix LTO/non-LTO in this case. > > > I'm > > > using upstream defconfig and upstream defconfig + LTO enabled and the > > > result is > > > that spl increase in size for LTO building. I'm working to keep out > > > part that are not really needed but > > > I was hoping that LTO give me some help here > > > > Yes, LTO saves about 5KiB on the SPL binary. You just need to enable it > > in the config before you start building, not after you've built > > everything once. > > Offcourse ;) but this not the case. I don't drink enough to think that > change a config, decrease the build size ;)
LTO is an entirely different way of the compiler / linker optimizing the binary. So yes, in this case enabling a single option decreases the size. -- Tom
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