Bug #48332 for Devel-CheckLib: Wishlist: Check for existence of a specific function

Thu Jul 30 15:17:17 2009 jettero [...] cpan.org - Ticket created

Subject:

wishlist item:

These should really be user definable... I'm just going to edit the files in inc/ -- but it'd be handier (in terms of upgrades) if I could just set it from the Makefile. print $ch qq{#include <$header>\nint main(void) { return 0; }\n}; print $ch "int main(void) { return 0; }\n"; I need to do something besides return 0 to check for the right library version. -- If riding in an airplane is flying, then riding in a boat is swimming. 110 jumps, 45.0 minutes of freefall, 86.2 freefall miles.

Thu Jul 30 16:39:49 2009 dagolden [...] cpan.org - Correspondence added

The subject appears to be truncated -- what is it that you think needs to be customizable?

Thu Jul 30 16:39:49 2009 The RT System itself - Status changed from 'new' to 'open'

Thu Jul 30 17:10:46 2009 jettero [...] cpan.org - Correspondence added

Subject:	Re: [rt.cpan.org #48332] wishlist item:
Date:	Thu, 30 Jul 2009 17:10:20 -0400
To:	David Golden via RT <bug-Devel-CheckLib [...] rt.cpan.org>
From:	Paul Miller <jettero [...] cpan.org>

On Thu, Jul 30, 2009 at 04:39:50PM -0400, David Golden via RT wrote: Show quoted text

> The subject appears to be truncated -- what is it that you think needs > to be customizable?

Yeah, the subject isn't what I intended, but the body was... I need to check for the existence of a certain function. I did this in my inc/ by commenting out your $cfile (tempfile) and using my own... I'd prefer a config setting I could use from Makefile.PL or support for checking for functions or something. -- If riding in an airplane is flying, then riding in a boat is swimming. 110 jumps, 45.0 minutes of freefall, 86.2 freefall miles.

Thu Jul 30 21:25:21 2009 dagolden [...] cpan.org - Subject changed from 'wishlist item: ' to 'Wishlist: Check for existence of a specific function'

Fri Jul 31 10:13:11 2009 dcantrell [...] cpan.org - Correspondence added

Show quoted text

> I need to check for the existence of a certain function. > I did this in my inc/ by commenting out your $cfile (tempfile) > and using my own... > > I'd prefer a config setting I could use from Makefile.PL or > support for checking for functions or something.

Would it be sufficient to be able to provide your own body for main()? Then you could pass it something like ... if(function1() && function2() && library_version() > 1.23) { return 0; } else { return 1; } to check that function 1 and function2 exist, and that library_version is high enough. It would be specified something like ... check_lib_or_exit( lib => 'jpeg', header => 'jpeglib.h', checkfunction => 'C code goes here' ); Then finally, we need to run the generated executable and make sure it returns the right value.

Fri Jul 31 13:54:57 2009 jettero [...] cpan.org - Correspondence added

Subject:	Re: [rt.cpan.org #48332] Wishlist: Check for existence of a specific function
Date:	Fri, 31 Jul 2009 13:54:32 -0400
To:	David Cantrell via RT <bug-Devel-CheckLib [...] rt.cpan.org>
From:	Paul Miller <jettero [...] cpan.org>

On Fri, Jul 31, 2009 at 10:13:12AM -0400, David Cantrell via RT wrote: Show quoted text

> Would it be sufficient to be able to provide your own body for main()? > Then you could pass it something like ... > > if(function1() && function2() && library_version() > 1.23) { return 0; } > else { return 1; }

This is almost fine for my purposes. I just want to see if the function is *there*. Others may need more, so to fix it in the general sense, it does make sense to check the return values and things. I also need to specify an #include though. Perhaps that carries over from the header setting? -Paul -- If riding in an airplane is flying, then riding in a boat is swimming. 110 jumps, 45.0 minutes of freefall, 86.2 freefall miles.

Fri Jul 31 18:30:44 2009 dcantrell [...] cpan.org - Correspondence added

Show quoted text

> This is almost fine for my purposes. I just want to see if the > function is *there*. Others may need more, so to fix it in the > general sense, it does make sense to check the return values and > things.

If the function ain't there, then it should fail at link-time. Show quoted text

> I also need to specify an #include though. Perhaps that carries > over from the header setting?

Yes.

Sat Aug 01 11:33:34 2009 dcantrell [...] cpan.org - Correspondence added

Feature added (I think!) in 0.699_001, will bump to 0.7 once CPAN-testers results are in.

Sat Aug 01 11:33:36 2009 dcantrell [...] cpan.org - Status changed from 'open' to 'resolved'