Merge pull request #3139 from cremno/fix-vs2010-build

deprecate and fix VS2010/2012 build

include/mruby/value.h

@@ -22,7 +22,19 @@ struct mrb_state;
 # error "You can't define MRB_INT16 and MRB_INT64 at the same time."
 #endif
 
-#include <inttypes.h>
+#if defined _MSC_VER && _MSC_VER < 1800
+# define PRIo64 "llo"
+# define PRId64 "lld"
+# define PRIx64 "llx"
+# define PRIo16 "ho"
+# define PRId16 "hd"
+# define PRIx16 "hx"
+# define PRIo32 "o"
+# define PRId32 "d"
+# define PRIx32 "x"
+#else
+# include <inttypes.h>
+#endif
 
 #if defined(MRB_INT64)
   typedef int64_t mrb_int;

tasks/toolchains/visualcpp.rake

@@ -1,5 +1,5 @@
 MRuby::Toolchain.new(:visualcpp) do |conf, _params|
-  [conf.cc].each do |cc|
+  conf.cc do |cc|
     cc.command = ENV['CC'] || 'cl.exe'
     # C4013: implicit function declaration
     cc.flags = [ENV['CFLAGS'] || %w(/c /nologo /W3 /we4013 /Zi /MD /O2 /D_CRT_SECURE_NO_WARNINGS)]
@@ -9,7 +9,7 @@ MRuby::Toolchain.new(:visualcpp) do |conf, _params|
     cc.compile_options = "%{flags} /Fo%{outfile} %{infile}"
   end
 
-  [conf.cxx].each do |cxx|
+  conf.cxx do |cxx|
     cxx.command = ENV['CXX'] || 'cl.exe'
     cxx.flags = [ENV['CXXFLAGS'] || ENV['CFLAGS'] || %w(/c /nologo /W3 /Zi /MD /O2 /EHs /D_CRT_SECURE_NO_WARNINGS)]
     cxx.defines = %w(DISABLE_GEMS MRB_STACK_EXTEND_DOUBLING)
@@ -50,4 +50,15 @@ MRuby::Toolchain.new(:visualcpp) do |conf, _params|
   end
 
   conf.file_separator = '\\'
+
+  if require 'open3'
+    Open3.popen3 conf.cc.command do |_, _, e, _|
+      if /Version (?<v>\d{2}\.\d{2}\.\d{5})/ =~ e.gets && v.to_i <= 17
+        m = "# VS2010/2012 support will be dropped after the next release! #"
+        h = "#" * m.length
+        puts h, m, h
+      end
+    end
+  end
+
 end