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From:	John Williams <jwilliams AT itee DOT uq DOT edu DOT au>
Subject:	Bug in Cygwin bash?
Date:	Thu, 03 Apr 2003 12:06:07 +1000
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Hi folks,

I've found a bizarro error that may in fact relate to Cygwin/bash.  I'm 
using the latest version (ran setup and refreshed just yesterday).

In the linux kernel configuration process, there is a rule in 
/linux-2.4.x/makefile that looks like this:

dep-files:
	scripts/mkdep -- `find .....` > .hdepend

The find command returns a huge list of header files, from which 
dependencies are derived.

After some digging I've found that it fails when the length of the 
string returned by `find...` exceeds about 32K characters.  It doesn't 
seem to matter how many file names are returned, just the total length 
of the string that contains them all.

This may be a bug in the mkdep utility, but I suspect more that it might 
be a limitation in Cygwin or bash.  Is there some fundamental limitation 
to the length of the argv[] array when launching programs under Cygwin/bash?

I created a workaround by doing

dep-files:
	rm -f .hdepend
	find .... | xargs scripts/mkdep -- >> .hdepend

But this means I need to patch over the standard linux build 
distribution before doing anything under Cygwin.

Can anyone confirm or deny?! :)

Cheers,

John



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