Can use external libs as dependencies of dependencies. Closes #321.

interpreter.py

@@ -1123,7 +1123,7 @@ class Interpreter():
                 d = d.held_object
             except Exception:
                 pass
-            if not isinstance(d, (dependencies.Dependency, dependencies.ExternalLibrary)):
+            if not isinstance(d, (dependencies.Dependency, dependencies.ExternalLibrary, dependencies.InternalDependency)):
                 raise InterpreterException('Dependencies must be external deps')
             final_deps.append(d)
         dep = dependencies.InternalDependency(incs, libs, sources, final_deps)

test cases/linuxlike/1 pkg-config/meson.build

@@ -7,6 +7,11 @@ exe = executable('zlibprog', 'prog.c', dependencies : dep)
 
 test('zlibtest', exe)
 
+# Test that dependencies of dependencies work.
+dep2 = declare_dependency(dependencies : dep)
+exe2 = executable('zlibprog2', 'prog.c', dependencies : dep2)
+test('zlibtest2', exe2)
+
 # Try to find a nonexistant library to ensure requires:false works.
 
 dep = dependency('nvakuhrabnsdfasdf', required : false)

test cases/linuxlike/2 external library/meson.build

@@ -27,3 +27,8 @@ test('libtest', e)
 intdep = declare_dependency(dependencies : zlib)
 exe2 = executable('zprog2', 'prog.c', dependencies : intdep)
 test('libtest2', exe2)
+
+# Test that deps that use find_library deps work.
+depdep = declare_dependency(dependencies : intdep)
+exe3 = executable('zprog3', 'prog.c', dependencies : depdep)
+test('libtest3', exe3)