[kbuild-all] [arm:for-next 9/11] awk: line 2: function strtonum never defined

[Fengguang Wu]

On Tue, Oct 03, 2017 at 11:57:17AM +0100, Russell King - ARM Linux wrote:
>On Tue, Oct 03, 2017 at 06:05:40PM +0800, Fengguang Wu wrote:
>> Hi Russell King,
>>
>> On Tue, Oct 03, 2017 at 10:06:42AM +0100, Russell King - ARM Linux wrote:
>> >Shall I repeat my question from the last time this was reported?
>>
>> Sorry I cannot find your reply in email archive.
>
>Odd, because I sent a reply to your report on 29th September, and it
>made it to the linux-arm-kernel mailing list, and its archives:
>
>  http://archive.armlinux.org.uk/lurker/message/20170929.190625.9f5a9438.en.html

Ah yes, I find that now. So I'm using mawk, which does not support
gawk's strtonum..

>> Looking at this
>> error, the root cause should be strtonum requires gawk while what we
>> installed is
>>
>>        mawk 1.3.3 Nov 1996, Copyright (C) Michael D. Brennan
>>
>> We can trivially install gawk and make it the default, however is gawk
>> a requirement for kernel compilation? Or can we make it work with mawk,
>> too?
>
>Well, awk isn't mentioned in Documentation/Changes as a build requirement,
>but then neither is grep.  However, kbuild itself makes use of both:
>
>Makefile:AWK                = awk
>Makefile:   $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
>Makefile:   $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
>scripts/Makefile.build:     if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then                \

Right. Here gawk/mawk happen to behave different on int(), which makes
awk not usable here in a portable way. As you said in the other email,
perl looks a viable alternative.

Thanks,
Fengguang