How to use “configure” and “make” commands for Ruby

This is for developers of Ruby. If you are a user of Ruby, please see

In-place build

$ ./
$ ./configure --prefix=$PWD/local
$ make
$ make install
$ ./local/bin/ruby -e 'puts "Hello"'

Out-of-place build

$ ./
$ mkdir ../ruby-build
$ cd ../ruby-build
$ ../ruby-src/configure --prefix=$PWD/local
$ make
$ make install
$ ./local/bin/ruby -e 'puts "Hello"'

How to run the whole test suite

$ make check

It runs (about) three test suites:

How to run the test suite with log

$ make test OPTS=-v

$ make test-all TESTS=-v

$ make test-spec MSPECOPT=-Vfs

How to run a part of the test suite

Runs a directory

$ make test-all TESTS=test/rubygems
$ make test-all TESTS=rubygems

Runs a file

$ make test-all TESTS=test/ruby/test_foo.rb
$ make test-all TESTS=ruby/foo

Runs a test whose name includes test_bar

$ make test-all TESTS="test/ruby/test_foo.rb -n /test_bar/"

Runs a file or directory with GNU make

$ make test/ruby/test_foo.rb
$ make test/ruby/test_foo.rb TESTOPTS="-n /test_bar/"

Runs a ruby-spec directory

$ make test-spec MSPECOPT=spec/ruby/core/foo

Runs a ruby-spec file

$ make test-spec MSPECOPT=spec/ruby/core/foo/bar_spec.rb

Runs a ruby-spec file or directory with GNU make

$ make spec/ruby/core/foo/bar_spec.rb

Runs a bundler spec file

$ make test-bundler BUNDLER_SPECS=commands/exec_spec.rb:58

How to measure coverage of C and Ruby code

You need to be able to use gcc (gcov) and lcov visualizer.

$ ./
$ ./configure --enable-gcov
$ make
$ make update-coverage
$ rm -f test-coverage.dat
$ make test-all COVERAGE=true
$ make lcov
$ open lcov-out/index.html

If you need only C code coverage, you can remove COVERAGE=true from the above process. You can also use gcov command directly to get per-file coverage.

If you need only Ruby code coverage, you can remove --enable-gcov. Note that test-coverage.dat accumulates all runs of make test-all. Make sure that you remove the file if you want to measure one test run.

You can see the coverage result of CI:

How to benchmark