From: okkez000@...
Date: 2018-04-06T03:58:40+00:00
Subject: [ruby-dev:50520] [Ruby trunk Bug#14668] Ruby2.6.0-preview1とtrunkでnmatrixがコンパイルできない

Issue #14668 has been reported by okkez (okkez _).

----------------------------------------
Bug #14668: Ruby2.6.0-preview1とtrunkでnmatrixがコンパイルできない
https://bugs.ruby-lang.org/issues/14668

* Author: okkez (okkez _)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
https://github.com/SciRuby/nmatrix

Ruby2.5.1 まではコンパイルできたのですが、Ruby2.6.0-preview1 および trunk(r63103) でコンパイルできませんでした。

trunk を使ってビルドしたときのログです。

```
$ cd nmatrix
$ bundle exec rake compile:nmatrix
cd tmp/x86_64-linux/nmatrix/2.6.0
/tmp/local/bin/ruby -I. ../../../../ext/nmatrix/extconf.rb
using C++ standard... c++11
g++ reports version... 7.3.0-14)
checking for rb_array_const_ptr() in ruby.h... yes
creating nmatrix_config.h
creating Makefile
cd -
cd tmp/x86_64-linux/nmatrix/2.6.0
/usr/bin/make
compiling ../../../../ext/nmatrix/nmatrix.cpp
cc1plus: warning: command line option ‘-Wimplicit-int’ is valid for C/ObjC but not for C++
In file included from ../../../../ext/nmatrix/nmatrix.cpp:46:0:
../../../../ext/nmatrix/math/math.h: In function ‘I nm::math::smmp_sort::median(I, I, I)’:
../../../../ext/nmatrix/math/math.h:341:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if (a < c) return c; // a c b
       ^~
../../../../ext/nmatrix/math/math.h:342:18: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
                  return a; // c a b
                  ^~~~~~
../../../../ext/nmatrix/math/math.h:346:7: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
       if (b < c) return c; // b c a
       ^~
../../../../ext/nmatrix/math/math.h:347:18: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
                  return b; // c b a
                  ^~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby.h:33:0,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
../../../../ext/nmatrix/ruby_nmatrix.c: In function ‘VALUE nm_init_new_version(int, VALUE*, VALUE)’:
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:26: error: expected primary-expression before ‘)’ token
         RUBY_ALIGNOF(type) * CHAR_BIT)
                          ^
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:1245:25: note: in expansion of macro ‘NM_ALLOCA_N’
     VALUE* slice_argv = NM_ALLOCA_N(VALUE, dim);
                         ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby/ruby.h:24:0,
                 from /tmp/local/include/ruby-2.6.0/ruby.h:33,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: error: ‘_Alignof’ was not declared in this scope
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:1245:25: note: in expansion of macro ‘NM_ALLOCA_N’
     VALUE* slice_argv = NM_ALLOCA_N(VALUE, dim);
                         ^~~~~~~~~~~
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: note: suggested alternative: ‘__lrintf’
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:1245:25: note: in expansion of macro ‘NM_ALLOCA_N’
     VALUE* slice_argv = NM_ALLOCA_N(VALUE, dim);
                         ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby.h:33:0,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:26: error: expected primary-expression before ‘)’ token
         RUBY_ALIGNOF(type) * CHAR_BIT)
                          ^
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:1255:21: note: in expansion of macro ‘NM_ALLOCA_N’
     slice->coords = NM_ALLOCA_N(size_t, dim);
                     ^~~~~~~~~~~
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:26: error: expected primary-expression before ‘)’ token
         RUBY_ALIGNOF(type) * CHAR_BIT)
                          ^
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:1256:22: note: in expansion of macro ‘NM_ALLOCA_N’
     slice->lengths = NM_ALLOCA_N(size_t, dim);
                      ^~~~~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c: In function ‘VALUE nm_cast(VALUE, VALUE, VALUE, VALUE)’:
../../../../ext/nmatrix/ruby_nmatrix.c:1511:32: error: expected primary-expression before ‘char’
   void* init_ptr = NM_ALLOCA_N(char, DTYPE_SIZES[new_dtype]);
                                ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:22: note: in definition of macro ‘ALLOCA_N’
         RUBY_ALIGNOF(type) * CHAR_BIT)
                      ^~~~
../../../../ext/nmatrix/ruby_nmatrix.c:1511:20: note: in expansion of macro ‘NM_ALLOCA_N’
   void* init_ptr = NM_ALLOCA_N(char, DTYPE_SIZES[new_dtype]);
                    ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby/ruby.h:24:0,
                 from /tmp/local/include/ruby-2.6.0/ruby.h:33,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: error: ‘_Alignof’ was not declared in this scope
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:1511:20: note: in expansion of macro ‘NM_ALLOCA_N’
   void* init_ptr = NM_ALLOCA_N(char, DTYPE_SIZES[new_dtype]);
                    ^~~~~~~~~~~
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: note: suggested alternative: ‘__lrintf’
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:1511:20: note: in expansion of macro ‘NM_ALLOCA_N’
   void* init_ptr = NM_ALLOCA_N(char, DTYPE_SIZES[new_dtype]);
                    ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby.h:33:0,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
../../../../ext/nmatrix/ruby_nmatrix.c: In function ‘VALUE nm_mset(int, VALUE*, VALUE)’:
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:26: error: expected primary-expression before ‘)’ token
         RUBY_ALIGNOF(type) * CHAR_BIT)
                          ^
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2014:21: note: in expansion of macro ‘NM_ALLOCA_N’
     slice->coords = NM_ALLOCA_N(size_t, dim);
                     ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby/ruby.h:24:0,
                 from /tmp/local/include/ruby-2.6.0/ruby.h:33,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: error: ‘_Alignof’ was not declared in this scope
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2014:21: note: in expansion of macro ‘NM_ALLOCA_N’
     slice->coords = NM_ALLOCA_N(size_t, dim);
                     ^~~~~~~~~~~
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: note: suggested alternative: ‘__lrintf’
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2014:21: note: in expansion of macro ‘NM_ALLOCA_N’
     slice->coords = NM_ALLOCA_N(size_t, dim);
                     ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby.h:33:0,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:26: error: expected primary-expression before ‘)’ token
         RUBY_ALIGNOF(type) * CHAR_BIT)
                          ^
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2015:22: note: in expansion of macro ‘NM_ALLOCA_N’
     slice->lengths = NM_ALLOCA_N(size_t, dim);
                      ^~~~~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c: In function ‘VALUE nm_shape(VALUE)’:
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:26: error: expected primary-expression before ‘)’ token
         RUBY_ALIGNOF(type) * CHAR_BIT)
                          ^
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2132:18: note: in expansion of macro ‘NM_ALLOCA_N’
   VALUE* shape = NM_ALLOCA_N(VALUE, s->dim);
                  ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby/ruby.h:24:0,
                 from /tmp/local/include/ruby-2.6.0/ruby.h:33,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: error: ‘_Alignof’ was not declared in this scope
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2132:18: note: in expansion of macro ‘NM_ALLOCA_N’
   VALUE* shape = NM_ALLOCA_N(VALUE, s->dim);
                  ^~~~~~~~~~~
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: note: suggested alternative: ‘__lrintf’
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2132:18: note: in expansion of macro ‘NM_ALLOCA_N’
   VALUE* shape = NM_ALLOCA_N(VALUE, s->dim);
                  ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby.h:33:0,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
../../../../ext/nmatrix/ruby_nmatrix.c: In function ‘VALUE nm_offset(VALUE)’:
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:26: error: expected primary-expression before ‘)’ token
         RUBY_ALIGNOF(type) * CHAR_BIT)
                          ^
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2154:19: note: in expansion of macro ‘NM_ALLOCA_N’
   VALUE* offset = NM_ALLOCA_N(VALUE, s->dim);
                   ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby/ruby.h:24:0,
                 from /tmp/local/include/ruby-2.6.0/ruby.h:33,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: error: ‘_Alignof’ was not declared in this scope
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2154:19: note: in expansion of macro ‘NM_ALLOCA_N’
   VALUE* offset = NM_ALLOCA_N(VALUE, s->dim);
                   ^~~~~~~~~~~
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: note: suggested alternative: ‘__lrintf’
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2154:19: note: in expansion of macro ‘NM_ALLOCA_N’
   VALUE* offset = NM_ALLOCA_N(VALUE, s->dim);
                   ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby.h:33:0,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
../../../../ext/nmatrix/ruby_nmatrix.c: In function ‘VALUE nm_supershape(VALUE)’:
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:26: error: expected primary-expression before ‘)’ token
         RUBY_ALIGNOF(type) * CHAR_BIT)
                          ^
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2181:18: note: in expansion of macro ‘NM_ALLOCA_N’
   VALUE* shape = NM_ALLOCA_N(VALUE, s->dim);
                  ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby/ruby.h:24:0,
                 from /tmp/local/include/ruby-2.6.0/ruby.h:33,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: error: ‘_Alignof’ was not declared in this scope
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2181:18: note: in expansion of macro ‘NM_ALLOCA_N’
   VALUE* shape = NM_ALLOCA_N(VALUE, s->dim);
                  ^~~~~~~~~~~
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: note: suggested alternative: ‘__lrintf’
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2181:18: note: in expansion of macro ‘NM_ALLOCA_N’
   VALUE* shape = NM_ALLOCA_N(VALUE, s->dim);
                  ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby.h:33:0,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
../../../../ext/nmatrix/ruby_nmatrix.c: In function ‘VALUE nm_xslice(int, VALUE*, void* (*)(const STORAGE*, SLICE*), void (*)(NMATRIX*), VALUE)’:
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:26: error: expected primary-expression before ‘)’ token
         RUBY_ALIGNOF(type) * CHAR_BIT)
                          ^
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2258:21: note: in expansion of macro ‘NM_ALLOCA_N’
     slice->coords = NM_ALLOCA_N(size_t, dim);
                     ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby/ruby.h:24:0,
                 from /tmp/local/include/ruby-2.6.0/ruby.h:33,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: error: ‘_Alignof’ was not declared in this scope
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2258:21: note: in expansion of macro ‘NM_ALLOCA_N’
     slice->coords = NM_ALLOCA_N(size_t, dim);
                     ^~~~~~~~~~~
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: note: suggested alternative: ‘__lrintf’
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2258:21: note: in expansion of macro ‘NM_ALLOCA_N’
     slice->coords = NM_ALLOCA_N(size_t, dim);
                     ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby.h:33:0,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:26: error: expected primary-expression before ‘)’ token
         RUBY_ALIGNOF(type) * CHAR_BIT)
                          ^
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2259:22: note: in expansion of macro ‘NM_ALLOCA_N’
     slice->lengths = NM_ALLOCA_N(size_t, dim);
                      ^~~~~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c: In function ‘VALUE nm_inverse_exact(VALUE, VALUE, VALUE, VALUE)’:
../../../../ext/nmatrix/ruby_nmatrix.c:2965:30: error: expected primary-expression before ‘char’
   void* result = NM_ALLOCA_N(char, DTYPE_SIZES[dtype]);
                              ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:22: note: in definition of macro ‘ALLOCA_N’
         RUBY_ALIGNOF(type) * CHAR_BIT)
                      ^~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2965:18: note: in expansion of macro ‘NM_ALLOCA_N’
   void* result = NM_ALLOCA_N(char, DTYPE_SIZES[dtype]);
                  ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby/ruby.h:24:0,
                 from /tmp/local/include/ruby-2.6.0/ruby.h:33,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: error: ‘_Alignof’ was not declared in this scope
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2965:18: note: in expansion of macro ‘NM_ALLOCA_N’
   void* result = NM_ALLOCA_N(char, DTYPE_SIZES[dtype]);
                  ^~~~~~~~~~~
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: note: suggested alternative: ‘__lrintf’
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:2965:18: note: in expansion of macro ‘NM_ALLOCA_N’
   void* result = NM_ALLOCA_N(char, DTYPE_SIZES[dtype]);
                  ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby.h:33:0,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
../../../../ext/nmatrix/ruby_nmatrix.c: In function ‘VALUE nm_det_exact(VALUE)’:
../../../../ext/nmatrix/ruby_nmatrix.c:3009:30: error: expected primary-expression before ‘char’
   void* result = NM_ALLOCA_N(char, DTYPE_SIZES[dtype]);
                              ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:22: note: in definition of macro ‘ALLOCA_N’
         RUBY_ALIGNOF(type) * CHAR_BIT)
                      ^~~~
../../../../ext/nmatrix/ruby_nmatrix.c:3009:18: note: in expansion of macro ‘NM_ALLOCA_N’
   void* result = NM_ALLOCA_N(char, DTYPE_SIZES[dtype]);
                  ^~~~~~~~~~~
In file included from /tmp/local/include/ruby-2.6.0/ruby/ruby.h:24:0,
                 from /tmp/local/include/ruby-2.6.0/ruby.h:33,
                 from ../../../../ext/nmatrix/nmatrix.cpp:35:
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: error: ‘_Alignof’ was not declared in this scope
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:3009:18: note: in expansion of macro ‘NM_ALLOCA_N’
   void* result = NM_ALLOCA_N(char, DTYPE_SIZES[dtype]);
                  ^~~~~~~~~~~
/tmp/local/include/ruby-2.6.0/x86_64-linux/ruby/config.h:134:22: note: suggested alternative: ‘__lrintf’
 #define RUBY_ALIGNOF _Alignof
                      ^
/tmp/local/include/ruby-2.6.0/ruby/ruby.h:1613:9: note: in expansion of macro ‘RUBY_ALIGNOF’
         RUBY_ALIGNOF(type) * CHAR_BIT)
         ^~~~~~~~~~~~
../../../../ext/nmatrix/nm_memory.h:44:31: note: in expansion of macro ‘ALLOCA_N’
 #define NM_ALLOCA_N(type, n) (ALLOCA_N(type, n))
                               ^~~~~~~~
../../../../ext/nmatrix/ruby_nmatrix.c:3009:18: note: in expansion of macro ‘NM_ALLOCA_N’
   void* result = NM_ALLOCA_N(char, DTYPE_SIZES[dtype]);
                  ^~~~~~~~~~~
At global scope:
cc1plus: warning: unrecognized command line option ‘-Wno-self-assign’
cc1plus: warning: unrecognized command line option ‘-Wno-constant-logical-operand’
cc1plus: warning: unrecognized command line option ‘-Wno-parentheses-equality’
make: *** [Makefile:250: nmatrix.o] エラー 1
rake aborted!
Command failed with status (2): [/usr/bin/make...]
/tmp/local/bin/bundle:23:in `load'
/tmp/local/bin/bundle:23:in `<main>'
Tasks: TOP => compile:nmatrix => compile:nmatrix:x86_64-linux => copy:nmatrix:x86_64-linux:2.6.0 => tmp/x86_64-linux/nmatrix/2.6.0/nmatrix.so
(See full trace by running task with --trace)
```

これは nmatrix 側で何か対応が必要でしょうか？対応が必要であれば、どのような変更をすればよいのか教えてもらえないでしょうか？




-- 
https://bugs.ruby-lang.org/