37signals are dropping AWS, which means goodbye to S3 and CloudFront.
The CloudFront mirror (dqw8nmjcqpjn7.cloudfront.net) was introduced ages
ago to address intermittent unavailability from some upstream sources.
These days, it mainly serves non-MRI packages like OpenSSL and libyaml.
Ruby releases are now served by Fastly (cache.ruby-lang.org) which has
bypassed the ruby-build mirror since 2015. Other sources (GitHub, RubyGems,
Maven) have their own CDNs.
This change removes the default `RUBY_BUILD_MIRROR_URL` and S3 release
mirroring. Custom mirror support remains.
TruffleRuby build definitions used to explicitly rely on `brew --prefix openssl@1.1` on macOS and abort installation if that was not found. However, this check didn't take into account that the user might have set OPENSSL_PREFIX in their environment, or that they have another `openssl@*` version installed via Homebrew. This change removes the `use_homebrew_openssl` check and allows TruffleRuby to perform its own OpenSSL detection.
https://github.com/oracle/truffleruby/blob/vm-23.1.0/lib/truffle/truffle/openssl-prefix.rb#L14-L17
The default settings for LDFLAGS and CPPFLAGS were there since the initial commit to ruby-build:
LDFLAGS="-L${PREFIX_PATH}/lib"
CPPFLAGS="-I${PREFIX_PATH}/include"
However, it's not clear to me what these settings help with. A typical Ruby installation will initialize files in these directories, but it will do so regardless of the environment variables.
So, let's remove them and see what breaks.
MRI's BigInt use GMP under the hood if available, and if not
fallbacks to an homemade implementation with much worse performance.
Without GMP:
```
>> Benchmark.realtime { Integer('1' * (10 ** 7)) }
=> 13.80743500002427
```
With GMP
```
>> Benchmark.realtime { Integer('1' * (10 ** 7)) }
=> 0.4098639999865554
```
macOS not being a common production platform, it's not a huge deal
but it would still preferable to compile with `gmp.h` if present.
I'd also suggest to print a warning if compiling on macOS and gmp
isn't installed, but I don't know if it's desirable.
NB: `--with-gmp-dir` was only added recently, so this will only
apply to MRI >= 3.2, as well as rubies on which this flag was backported.
* Supports using other GraalVM languages such as JavaScript, Python, R and Java.
* Supports running TruffleRuby on JVM and not only Native.
* Add GraalVM 20.1.0.
* The openssl built by ruby-build was not used by TruffleRuby,
and causes https://github.com/oracle/truffleruby/issues/1818
* Improve error message when openssl from Homebrew is not available.
* Change the definition code so it checks the operating system too.
