On Wed, Dec 16, 2020 at 2:46 PM Masahiro Yamada <masahiroy@xxxxxxxxxx> wrote:
>
> Does it depend on the awk version?
>
> I tried this in FreeBSD 12.
>
> masahiro@:~ $ cat test.awk
> BEGIN { print N }
> masahiro@:~ $ awk --version
> awk version 20121220 (FreeBSD)
> masahiro@:~ $ awk -ftest.awk -vN=1
> 1
>
> It worked for me.
>
Yes, it appears to be version dependent. Apologies for the confusion
-- I didn't realize there were multiple dialects of BSD awk.
On FreeBSD and OpenBSD awk works with the existing command. On NetBSD
and macOS awk fails with the following error:
$ touch unroll.awk input.c
$ awk -f./unroll.awk -vN=0 < input.c
awk: can't open file -vN=0
source line number 1 source file -vN=0
context is
>>> <<<
$
My patch lets the $(UNROLL) command support the NetBSD/macOS variant
-- this is needed to support building the Linux kernel on a macOS host
machine.
