r181397 of src/usr.bin/make/job.c breaks cross-compiles

[Andrey Chernov]

On Sun, Sep 28, 2008 at 11:14:52PM +0100, Bruce M Simpson wrote:
> When cross-building a make as part of a NanoBSD arm job (amd64 
> 7.1-PRERELEASE hosting an arm -CURRENT build), this change appears to 
> break buildworld. If I back out this change and go back to rev 176808, 
> the buildworld is fine.

Please explain, how it may cause problem? In 'make world' or 'make 
buildworld;make installworld' headers and libraries was builded first with 
old make, _then_ the new make is builded. 'make' is not a bootstrap tool 
builded first (at -current, I don't check -stable branch)

If you uprade by hand you shound manually install headers, rebuild libs, 
then make.

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