the gem a noop on Rubies older than
2.6"
This reverts commit 75fcb74c32.
The version that does nothing with pre-ruby 2.6 has already been
released, so there is no longer need to consider older rubies in newer
versions.
930d2f0d07
Ref: https://github.com/mikel/mail/pull/1439
Some gems depend on io-wait, but still support older rubies,
so they have to chose between droping support or not listing io-wait.
But io-wait could act a a noop on older rubies.
75fcb74c32
* ext/extmk.rb (extmake): set library name as source file name in
Init_ext(). [ruby-dev:21137]
* lib/mkmf.rb (Logging::postpone): postpone logging messages after
heading message as the result of the block.
* lib/mkmf.rb (macro_defined?): append newline to src unless ended
with it.
* lib/mkmf.rb (have_library): allow nil function name to just
append a library. (ruby-bugs:PR#1083)
* lib/mkmf.rb (pkg_config): should append additional libraries to
$libs but not $LIBS. [ruby-dev:21137]
* ext/io/wait/extconf.rb: check DOSISH macro instead of platform.
* ext/digest/sha1/extconf.rb: have_library already appends library
name.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4337 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
