+swig (#801)

Closes #517

projects/swig.org/fixture.c

@@ -0,0 +1,4 @@
+int add(int x, int y)
+{
+  return x + y;
+}

projects/swig.org/fixture.i

@@ -0,0 +1,4 @@
+%module test
+%inline %{
+extern int add(int x, int y);
+%}

projects/swig.org/package.yml

@@ -0,0 +1,34 @@
+distributable:
+  url: https://downloads.sourceforge.net/project/swig/swig/swig-{{version}}/swig-{{version}}.tar.gz
+  strip-components: 1
+
+versions:
+  github: swig/swig/tags
+
+dependencies:
+  pcre.org/v2: '*'
+
+runtime:
+  env:
+    SWIG_LIB: ${{prefix}}/lib
+
+build:
+  dependencies:
+    tea.xyz/gx/cc: c99
+    tea.xyz/gx/make: '*'
+  script: |
+    ./configure --prefix="{{prefix}}" --with-swiglibdir={{prefix}}/lib
+    make --jobs {{ hw.concurrency }}
+    make install
+
+provides:
+  - bin/swig
+  - bin/ccache-swig
+
+test:
+  dependencies:
+    tea.xyz/gx/cc: c99
+    ruby-lang.org: ^3
+  script: |
+    swig -ruby fixture.i
+    cc -c -fPIC -fdeclspec fixture.c fixture_wrap.c