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Re: readline-8.0-alpha: Makefile.in: don't forget to create pkgconfigdir

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  Re: readline-8.0-alpha: Makefile.in: don't forget to create pkgconfigdir Eric Blake <eblake@redhat.com> - 2018-05-24 13:35 -0500

#14138 — Re: readline-8.0-alpha: Makefile.in: don't forget to create pkgconfigdir

On 05/24/2018 01:29 PM, Eric Blake wrote:
> On 05/24/2018 01:18 PM, Chet Ramey wrote:
>> On 5/24/18 11:40 AM, gabriele balducci wrote:
>>> hi
>>>
>>> just tried to build/install readline-8.0-alpha and found the following
>>> glitch:
>>
>> Thanks for the report. I think a better fix is to not to attempt to
>> install readline.pc if $(pkgconfigdir) is missing.
> 
> Why not? If you are doing an install into DESTDIR for the purpose of 
> bundling a pre-built binary for a distro, then $(pkgconfigdir) will be 
> missing, because the ONLY things living in DESTDIR are what the package 
> itself installs.  When DESTDIR is empty, you're right that either 
> $(pkgconfigdir) is likely to already exist, or that the user is not 
> using pkg-config; but even that's a risky assumption (when bootstrapping 
> a system, readline might be installed prior to pkg-config, and we 
> shouldn't require the user to run 'make install' a second time just to 
> install the pieces that weren't installed the first time).

Or, if you DO want to make it configurable as to whether to install the 
.pc file, then make it a './configure --enable-pkg-config' or some such 
flag at configure time, so the user can explicitly decide up front (with 
a sane default if they don't mention anything) whether 'make install' 
should attempt to install the .pc file, rather than making a magic 
decision based on whether a $(pkgconfigdir) directory already exists.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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