gistfile1.txt

on ubuntu 18.04 LTS i do this:


gem install slanger
Building native extensions. This could take a while... 
ERROR:  Error installing slanger:
        ERROR: Failed to build gem native extension.
                                                                                      
    current directory: /var/lib/gems/2.5.0/gems/oj-2.12.14/ext/oj                          
/usr/bin/ruby2.5 -r ./siteconf20180609-3115-hpt4bd.rb extconf.rb
>>>>> Creating Makefile for ruby version 2.5.1 on x86_64-linux-gnu <<<<<
creating Makefile

current directory: /var/lib/gems/2.5.0/gems/oj-2.12.14/ext/oj
make "DESTDIR=" clean

current directory: /var/lib/gems/2.5.0/gems/oj-2.12.14/ext/oj
make "DESTDIR="
compiling cache8.c
compiling circarray.c
compiling compat.c
compiling dump.c
dump.c: In function ‘dump_struct_obj’:
dump.c:1776:2: warning: ‘rb_struct_ptr’ is deprecated [-Wdeprecated-declarations]
  for (i = (int)RSTRUCT_LEN(obj), vp = RSTRUCT_PTR(obj); 0 < i; i--, vp++) {
  ^~~
In file included from /usr/include/ruby-2.5.0/ruby/ruby.h:24:0,
                 from /usr/include/ruby-2.5.0/ruby.h:33,
                 from oj.h:43,
                 from dump.c:43:
/usr/include/ruby-2.5.0/ruby/backward.h:47:37: note: declared here
 DECLARE_DEPRECATED_INTERNAL_FEATURE(rb_struct_ptr);
                                     ^
/usr/include/x86_64-linux-gnu/ruby-2.5.0/ruby/config.h:129:52: note: in definition of macro ‘NORETURN’
 #define NORETURN(x) __attribute__ ((__noreturn__)) x
                                                    ^
/usr/include/ruby-2.5.0/ruby/backward.h:39:14: note: in expansion of macro ‘ERRORFUNC’
     NORETURN(ERRORFUNC(("deprecated internal function"), DEPRECATED(void func(void))))
              ^~~~~~~~~
/usr/include/ruby-2.5.0/ruby/backward.h:39:58: note: in expansion of macro ‘DEPRECATED’
     NORETURN(ERRORFUNC(("deprecated internal function"), DEPRECATED(void func(void))))
                                                          ^~~~~~~~~~
/usr/include/ruby-2.5.0/ruby/backward.h:47:1: note: in expansion of macro ‘DECLARE_DEPRECATED_INTERNAL_FEATURE’
 DECLARE_DEPRECATED_INTERNAL_FEATURE(rb_struct_ptr);
 ^
In file included from /usr/include/ruby-2.5.0/ruby.h:33:0,
                 from oj.h:43,
                 from dump.c:43:
/usr/include/ruby-2.5.0/ruby/ruby.h:1189:33: error: too many arguments to function ‘rb_struct_ptr’
 #define RSTRUCT_PTR(st)         rb_struct_ptr(st)
                                 ^
dump.c:1776:39: note: in expansion of macro ‘RSTRUCT_PTR’
  for (i = (int)RSTRUCT_LEN(obj), vp = RSTRUCT_PTR(obj); 0 < i; i--, vp++) {
                                       ^~~~~~~~~~~
In file included from /usr/include/ruby-2.5.0/ruby/ruby.h:24:0,
                 from /usr/include/ruby-2.5.0/ruby.h:33,
                 from oj.h:43,
                 from dump.c:43:
/usr/include/ruby-2.5.0/ruby/backward.h:47:37: note: declared here
 DECLARE_DEPRECATED_INTERNAL_FEATURE(rb_struct_ptr);
                                     ^
/usr/include/x86_64-linux-gnu/ruby-2.5.0/ruby/config.h:129:52: note: in definition of macro ‘NORETURN’
 #define NORETURN(x) __attribute__ ((__noreturn__)) x
                                                    ^
/usr/include/ruby-2.5.0/ruby/backward.h:39:14: note: in expansion of macro ‘ERRORFUNC’
     NORETURN(ERRORFUNC(("deprecated internal function"), DEPRECATED(void func(void))))
              ^~~~~~~~~
/usr/include/ruby-2.5.0/ruby/backward.h:39:58: note: in expansion of macro ‘DEPRECATED’
     NORETURN(ERRORFUNC(("deprecated internal function"), DEPRECATED(void func(void))))
                                                          ^~~~~~~~~~
/usr/include/ruby-2.5.0/ruby/backward.h:47:1: note: in expansion of macro ‘DECLARE_DEPRECATED_INTERNAL_FEATURE’
 DECLARE_DEPRECATED_INTERNAL_FEATURE(rb_struct_ptr);
 ^
dump.c:1776:37: error: void value not ignored as it ought to be
  for (i = (int)RSTRUCT_LEN(obj), vp = RSTRUCT_PTR(obj); 0 < i; i--, vp++) {
                                     ^
Makefile:242: recipe for target 'dump.o' failed
make: *** [dump.o] Error 1

make failed, exit code 2

Gem files will remain installed in /var/lib/gems/2.5.0/gems/oj-2.12.14 for inspection.
Results logged to /var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/oj-2.12.14/gem_make.out