[U-Boot] [U-Boot, 2/2] imx8mq_evk/README: remove ARCH environment variable

[Baruch Siach]

Hi Stefano,

On Wed, Jan 30, 2019 at 03:33:21PM +0100, Stefano Babic wrote:
> On 30/01/19 10:48, Baruch Siach wrote:
> > On Wed, Jan 30, 2019 at 10:40:19AM +0200, sbabic at denx.de wrote:
> >>> There is no need to set the ARCH variable when building U-Boot. In fact,
> >>> the ARCH name in U-Boot is 'arm'.
> >>> Signed-off-by: Baruch Siach <baruch at tkos.co.il>
> >>
> >> Applied to u-boot-imx, master, thanks !
> > 
> > Thanks.
> > 
> > What about patch #1 in this series? It fixes build failure when /bin/sh is not 
> > bash.
> 
> I suffer from the prejudice that a single "=" is always bad in a
> comparison.....I am surely influenced from bugs in C/C++ due to a
> missing "=" in my experience as developer.
> 
> I searched for such as comparison in other parts of build to justify
> this patch : I have just found it in "test/fs" (ok, this is not really
> part of build) and in ./lib/lzma/import_lzmasdk.sh. I fully agree that
> this could be just a problem of mine, and I confess I was already merged
> your patch and then removed again..
> 
> Apart of this,  it looks like that a single "=" was already avoided in
> U-Boot scripts like the pest. Apart of the single entry I found above,
> it was avoided..
> 
> What about to substitute "=" with an explicit "-eq" ? Like :
> 
> 	[ $f -eq "spl/u-boot-spl-ddr.bin" ]

The '-eq' operator only accept integers:

$ [ f -eq "spl/u-boot-spl-ddr.bin" ]
bash: test: f: integer expression expected

The alternative is to set the script shebang to /bin/bash. I don't like this 
solution. What do you think?

baruch

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