+rbenv.org/ruby-build (#5211)

* new file:   projects/rbenv.org/ruby-build/package.yml

* +curl

* --verbose

* +make

* make & gcc for linux

* add rpath for darwin

* add $LDFLAGS

* ldflags like string

* companions

* all of runtime deps are companions

* deps

projects/rbenv.org/ruby-build/package.yml

@@ -0,0 +1,39 @@
+distributable:
+  url: git+https://github.com/rbenv/ruby-build.git
+  ref: ${{version.tag}}
+
+versions:
+  github: rbenv/ruby-build
+
+companions:
+  linux:
+    gnu.org/make: '*'
+    gnu.org/gcc: '*'
+
+dependencies:
+  openssl.org: '>=1.1'
+  curl.se: '*'
+  gnu.org/autoconf: ^2.72
+  freedesktop.org/pkg-config: '*'
+  gnu.org/readline: ^8.2
+  pyyaml.org/libyaml: ^0.2
+
+runtime:
+  env:
+    darwin:
+      LDFLAGS: -Wl,-rpath,{{pkgx.prefix}} $LDFLAGS
+
+build:
+  - make install PREFIX={{prefix}}
+
+provides:
+  - bin/ruby-build
+
+test:
+  script:
+    - ruby-build --version | grep {{version.raw}}
+    - ruby-build 2.7.8 $PWD/ruby-2.7.8 --verbose
+    - ruby --version | grep '2.7.8'
+    - ruby-build --help
+  env:
+    PATH: $PWD/ruby-2.7.8/bin:$PATH