Gem not compiling on Ubuntu 13.10 with CUPS 1.7rc1

[michalorman]

Installing a gem I'm receiving following output:

$ gem install cups
ERROR:  Error installing cups:
    ERROR: Failed to build gem native extension.

    /home/morman/.rubies/ruby-1.9.3-p448/bin/ruby extconf.rb
checking for main() in -lcups... yes
checking for cups-config... yes
cups version:
1.7rc1
creating Makefile

make
compiling cups.c
In file included from ./ruby_cups.h:9:0,
                 from cups.c:1:
/home/morman/.rubies/ruby-1.9.3-p448/include/ruby-1.9.1/ruby/backward/st.h:2:2: warning: #warning use "ruby/st.h" instead of bare "st.h" [-Wcpp]
 #warning use "ruby/st.h" instead of bare "st.h"
  ^
In file included from /home/morman/.rubies/ruby-1.9.3-p448/include/ruby-1.9.1/ruby/ruby.h:1383:0,
                 from /home/morman/.rubies/ruby-1.9.3-p448/include/ruby-1.9.1/ruby.h:32,
                 from ./ruby_cups.h:8,
                 from cups.c:1:
cups.c: In function ‘cups_get_device_uri’:
cups.c:469:31: error: dereferencing pointer to incomplete type
        return rb_str_new2(attr->values[0].string.text);
                               ^
/home/morman/.rubies/ruby-1.9.3-p448/include/ruby-1.9.1/ruby/intern.h:738:27: note: in definition of macro ‘rb_str_new_cstr’
     (__builtin_constant_p(str)) ?  \
                           ^
cups.c:469:15: note: in expansion of macro ‘rb_str_new2’
        return rb_str_new2(attr->values[0].string.text);
               ^
cups.c:469:31: error: dereferencing pointer to incomplete type
        return rb_str_new2(attr->values[0].string.text);
                               ^
/home/morman/.rubies/ruby-1.9.3-p448/include/ruby-1.9.1/ruby/intern.h:739:14: note: in definition of macro ‘rb_str_new_cstr’
  rb_str_new((str), (long)strlen(str)) : \
              ^
cups.c:469:15: note: in expansion of macro ‘rb_str_new2’
        return rb_str_new2(attr->values[0].string.text);
               ^
cups.c:469:31: error: dereferencing pointer to incomplete type
        return rb_str_new2(attr->values[0].string.text);
                               ^
/home/morman/.rubies/ruby-1.9.3-p448/include/ruby-1.9.1/ruby/intern.h:739:33: note: in definition of macro ‘rb_str_new_cstr’
  rb_str_new((str), (long)strlen(str)) : \
                                 ^
cups.c:469:15: note: in expansion of macro ‘rb_str_new2’
        return rb_str_new2(attr->values[0].string.text);
               ^
cups.c:469:31: error: dereferencing pointer to incomplete type
        return rb_str_new2(attr->values[0].string.text);
                               ^
/home/morman/.rubies/ruby-1.9.3-p448/include/ruby-1.9.1/ruby/intern.h:740:18: note: in definition of macro ‘rb_str_new_cstr’
  rb_str_new_cstr(str);   \
                  ^
cups.c:469:15: note: in expansion of macro ‘rb_str_new2’
        return rb_str_new2(attr->values[0].string.text);
               ^
make: *** [cups.o] Error 1


Gem files will remain installed in /home/morman/.gem/ruby/1.9.3/gems/cups-0.1.7 for inspection.
Results logged to /home/morman/.gem/ruby/1.9.3/gems/cups-0.1.7/ext/gem_make.out

Any ideas? Gem is not compatible with CUPS 1.7? Or is it a ruby version 1.9.3-p448 issue?

[nicklinnell]

I'm getting the same compile error in 13.10 too, I'm using ruby 1.9.3-p484

[bigtunacan]

I believe this is related to issue #15

[m0wfo]

@nicklinnell just pushed 0.1.9 to rubygems, want to check give it a go?

[nicklinnell]

@m0wfo 0.1.9 compiles fine on Ubuntu 13.10 and ruby 1.9.3-p429, thanks