[U-Boot] Build system: Don't check for CONFIG_SYS_TEXT_BASE being set

[Alexey Brodkin <Alexey.Brodkin@synopsys.com>]

On Mon, 2018-02-12 at 09:23 -0500, Tom Rini wrote:
> On Mon, Feb 12, 2018 at 01:27:30PM +0000, Alexey Brodkin wrote:
> > Hi Tom, Simon,
> > 
> > On Sun, 2018-02-11 at 15:47 -0500, Tom Rini wrote:
> > > On Tue, Jan 30, 2018 at 06:23:13PM +0300, Alexey Brodkin wrote:
> > > 
> > > > CONFIG_SYS_TEXT_BASE must be set anyways and then it is used in many
> > > > places in the same Makefile without any checks so there's no point in
> > > > keeping this check araound just in one place.
> > > > 
> > > > Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
> > > > Cc: Tom Rini <trini@konsulko.com>
> > > > Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
> > > > ---
> > > >  Makefile | 2 --
> > > >  1 file changed, 2 deletions(-)
> > > > 
> > > > diff --git a/Makefile b/Makefile
> > > > index ab3453dcebdc..6f15612b4d07 100644
> > > > --- a/Makefile
> > > > +++ b/Makefile
> > > > @@ -820,9 +820,7 @@ LDFLAGS_u-boot += $(LDFLAGS_FINAL)
> > > >  # Avoid 'Not enough room for program headers' error on binutils 2.28 onwards.
> > > >  LDFLAGS_u-boot += $(call ld-option, --no-dynamic-linker)
> > > >  
> > > > -ifneq ($(CONFIG_SYS_TEXT_BASE),)
> > > >  LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
> > > > -endif
> > > 
> > > This then causes xtensa to fail to build as it does not set
> > > CONFIG_SYS_TEXT_BASE.
> > 
> > And that also obviously breaks "efi-x86" target as well because CONFIG_SYS_TEXT_BASE
> > seems to not be defined for EFI and then LD gets a string like "-Ttext  -o u-boot"
> > where CONFIG_SYS_TEXT_BASE is supposed to be used as some value.

[snip]

> > So if "-Ttext CONFIG_SYS_TEXT_BASE" is not used for each and every board I may use
> > CONFIG_SYS_TEXT_BASE directly in linker just as we have it now, see
> > https://urldefense.proofpoint.com/v2/url?u=http-3A__git.denx.de_-3Fp-3Du-2Dboot.git-3Ba-3Dblob-3Bf-3Darch_arc_cpu_u-2Dboot.lds-23l14&d=DwIBAg&c=DP
> > L6_X_6JkXFx7AXWqB0tg&r=lqdeeSSEes0GFDDl656eViXO7breS55ytWkhpk5R81I&m=3oKsgMcKriZJ81auV4XDwr4ovIElxycDMpRlTqS7nhc&s=Yq0YW-
> > MQvofxwQ961IRHzIS5xWYtHHzxMp_Fwn91h5s&e=
> > and then there might be any section like .ivt, .text, .myfunkysection etc.
> > 
> > In fact in the Linux kernel "-Ttext XXX" is not used for everybody - some
> > arches like MIPS and PPC indeed set it but others do other things.
> > 
> > The simplest thing might be is to add another #ifdef for ARC and X86 which both
> > use CONFIG_SYS_TEXT_BASE directly in their linker scripts like that:
> > ------------------->8-----------------
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -820,9 +820,11 @@ LDFLAGS_u-boot += $(LDFLAGS_FINAL)
> >  # Avoid 'Not enough room for program headers' error on binutils 2.28 onwards.
> >  LDFLAGS_u-boot += $(call ld-option, --no-dynamic-linker)
> >  
> > +ifeq($(CONFIG_ARC)$(CONFIG_X86),)
> >  LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
> > +endif
> >  
> >  # Normally we fill empty space with 0xff
> >  quiet_cmd_objcopy = OBJCOPY $@
> > ------------------->8-----------------
> > 
> > Any thoughts?
> 
> I'm largely ok with the above, but:
> - You need to exclude CONFIG_NIOS2 in the above as well, or convert the
>   usage of CONFIG_SYS_MONITOR_BASE to CONFIG_SYS_TEXT_BASE (Thomas?)

Looks like NIOS2 builds are not yet supported in TravisCI which is
quite unfortunate... are there any instructions on how to build for Nios2
so that I may test my changes before posting them?

-Alexey