version.c: show +JIT when --jit is passed

in version output.
version.h: ditto
ruby.c: propagate option for it
common.mk: updated dependency for version.c

mjit.c: overwrites the RUBY_DESCRIPTION to have +JIT when --jit is passed

test/ruby/test_rubyoptions.rb: add test for them

Only `ruby --jit -v` will have "+JIT", but this is intentional.
This may not be convenient for debugging by ticket with `ruby -v`,
but it's convenient for benchmark tools that pass options (--jit)
when showing it. At least such behavior is planned for benchmark_driver.gem
and this behavior is designed for it. Other benchmark tools are
recommended to follow the behavior too if they show version.
RUBY_DESCRIPTION might be useful for it too.

The position of "+JIT" is changed from original proposal because other
platforms like JRuby and TruffleRuby end it with archtecture.
It's made similar to JRuby, but it's upper-cased because Matz made approval
for "+JIT" in the ticket.

Example:
$ ruby -v
ruby 2.6.0dev (2018-02-22 trunk 62529) [x86_64-linux]
$ ruby --jit -v
ruby 2.6.0dev (2018-02-22 trunk 62529) +JIT [x86_64-linux]

After --jit is made default in the future, this output may be removed.
So do not rely on this output if possible.

[Feature #14462]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62530 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 0 deletions

diff --git a/version.h b/version.h
index c585320aa3..afe58d92e9 100644
--- a/version.h
+++ b/version.h
@@ -66,6 +66,12 @@
     " ("RUBY_RELEASE_DATE	    \
     RUBY_REVISION_STR") "	    \
     "["RUBY_PLATFORM"]"
+# define RUBY_DESCRIPTION_WITH_JIT  \
+    "ruby "RUBY_VERSION             \
+    RUBY_PATCHLEVEL_STR             \
+    " ("RUBY_RELEASE_DATE           \
+    RUBY_REVISION_STR") +JIT "      \
+    "["RUBY_PLATFORM"]"
 # define RUBY_COPYRIGHT		    \
     "ruby - Copyright (C) "	    \
     RUBY_BIRTH_YEAR_STR"-"   \