Test whether internal-dep include order is preserved

https://github.com/mesonbuild/meson/issues/1495

test cases/common/138 include order/meson.build

@@ -19,4 +19,12 @@ subdir('sub3')
 # The directory where the target resides
 subdir('sub4')
 
+# Test that the order in which internal dependencies are specified is
+# preserved. This is needed especially when subprojects get involved and
+# multiple build-root config.h files exist, and we must be sure that the
+# correct one is found: https://github.com/mesonbuild/meson/issues/1495
+f = executable('somefxe', 'sub4/main.c',
+               dependencies : [correctinc, dep, wronginc])
+
 test('eh', e)
+test('oh', f)

test cases/common/138 include order/sub2/meson.build

@@ -1 +1,2 @@
 j = include_directories('.')
+wronginc = declare_dependency(include_directories : j)

test cases/common/138 include order/sub4/meson.build

@@ -2,3 +2,5 @@ e = executable('someexe', 'main.c',
                c_args : ['-I' + sub3],
                include_directories : j,
                dependencies : dep)
+
+correctinc = declare_dependency(include_directories : include_directories('.'))