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Re: AC_ARG_ENABLE and checking for unrecognized switches

From: Bob Friesenhahn
Subject: Re: AC_ARG_ENABLE and checking for unrecognized switches
Date: Fri, 15 Mar 2019 16:24:45 -0500 (CDT)
User-agent: Alpine 2.20 (GSO 67 2015-01-07)

On Fri, 15 Mar 2019, Kip Warner wrote:

My reading is that there *is* checking by default, but it is turned
off if you have a subdir configure, but then can be turned back on
again by the user.

Good eye, Tom. The only problem here is my doesn't use a
AC_CONFIG_SUBDIRS because there are no child scripts to
run, so by default that checking should have been enabled. It's
possible I could be doing something wrong though.

A project can be made subordinate to another project without the author of the subordinate project being aware of it. This is a very useful capability. This capability is used by projects such as GCC.

The Autotools philosophy is to provide as much freedom as possible to the end user while working in a consistent way. This would include the case where a project is created which builds several other projects.

Bob Friesenhahn
GraphicsMagick Maintainer,
Public Key,

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