Please update intree copy of libev

[darix]

the version that you have right now fails for some distros.

https://build.opensuse.org/package/live_build_log/home:darix:apps/rubygem-nio4r/openSUSE_Tumbleweed/x86_64

while our newer libev copy just works

https://build.opensuse.org/package/live_build_log/openSUSE:Factory/libev/standard/x86_64

[tarcieri]

@ioquatix can you take care of this? I can provide some instructions (which I should probably write down somewhere better than this issue but):

1. Download the latest libev
2. Copy the files that are in-tree over the existing ones. You shouldn't need any of the files that aren't currently in-tree
3. Look for the labeled patches to ev.c and apply them (sorry I don't have a proper patch file or way of generating one automatically at the moment): https://github.com/socketry/nio4r/search?q=patchery&unscoped_q=patchery
4. Apply any other previous changes: 785ab43

Not the greatest process. Perhaps we can look at writing a rake task that automates this or something.

[ioquatix]

Sure - I did this recently - but is there a newer update? I'll check.

[darix]

your patching introduces a bug:

ev_backend_poll

../libev/ev.c:3643:1: error: no return statement in function returning non-void [-Werror=return-type]

and it also complains about:

 In file included from /usr/include/ruby-2.6.0/ruby/ruby.h:29,                                                                                                                                 
                  from /usr/include/ruby-2.6.0/ruby.h:33,                                                                                                                                      
                  from nio4r.h:9,                                                                                                                                                              
                  from nio4r_ext.c:6:                                                                                                                                                          
 nio4r_ext.c: In function ‘Init_nio4r_ext’:                                                                                                                                                    
 /usr/include/ruby-2.6.0/ruby/defines.h:211:18: warning: passing argument 1 of ‘ev_set_allocator’ from incompatible pointer type [-Wincompatible-pointer-types]                                
   211 | #define xrealloc ruby_xrealloc                                                                                                                                                        
       |                  ^~~~~~~~~~~~~                                                                                                                                                        
       |                  |                                                                                                                                                                    
       |                  void * (*)(void *, size_t) {aka void * (*)(void *, long unsigned int)}                                                                                               
 nio4r_ext.c:15:22: note: in expansion of macro ‘xrealloc’                                                                                                                                     
    15 |     ev_set_allocator(xrealloc);                                                                                                                                                       
       |                      ^~~~~~~~                                                                                                                                                         
 In file included from nio4r_ext.c:7:                                                                                                                                                          
 ../libev/ev.c:1776:27: note: expected ‘void * (*)(void *, long int)’ but argument is of type ‘void * (*)(void *, size_t)’ {aka ‘void * (*)(void *, long unsigned int)’}                       
  1776 | ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT                                                                                                          
       |                   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~                                                                                                                                   

[darix]

just adding return 0 at the end would make it build but i am almost sure that is not what you want there :)

[darix]

tested with 2.5.1. still broken ev_backend_poll: ``` error: no return statement in function returning non-void [-Werror=return-type] ```

[ioquatix]

Hmmm it looks like issues with libev, if you have a few minutes you can rewrite long size to size_t and I don’t know about the other issue will need to review code.

[ioquatix]

return Qnil should be sufficient for the second issue. I’m on mobile phone and have meetings for the rest of the day, but can review later.

[darix]

Yes those other issues are in upstream libev as well. but the important thing is the code patched in by you for the extension. the upstream issues are annoying warnings (and libev has a lot of them) but can be ignored for now.

[ioquatix]

Yes agreed