Fix kselftest depend

docs/targets.md

@@ -120,9 +120,13 @@ which is copied into the output directory as `headers.tar.xz`.
 
 ## kselftest
 
-Build the kernsel selftests. The resulting, installed tests are compressed in a
+Build the kernel selftests. The resulting, installed tests are compressed in a
 tarball which is copied into the output directory as `kselftest.tar.xz`.
 
+This target depends on the `headers` target. The selftests build against the
+UAPI headers in the build directory, so they must be installed first. This is
+the same order the kernel uses for its own `make kselftest` target.
+
 TuxMake doesn't do anything special with regards to which tests are built, so
 by default it will build everything that kselftest builds by default. If you
 want to build a subset of the tests, you can use the same mechanism that you

test/test_build.py

@@ -1124,10 +1124,10 @@ def test_vmlinux(self, linux):
 
 
 class TestKselftest:
-    def test_kselftest_depends_on_config(self, linux):
+    def test_kselftest_depends_on_config_and_headers(self, linux):
         build = Build(tree=linux, targets=["kselftest"])
         names = [t.name for t in build.targets]
-        assert names == ["config", "kselftest"]
+        assert names == ["config", "headers", "kselftest"]
 
     def test_nonfatal_continues_on_failure(self, linux, mocker):
         b = Build(tree=linux, targets=["config"])

tuxmake/target/kselftest.ini

@@ -1,6 +1,6 @@
 [target]
 description = "Kernel selftest (kselftest)"
-dependencies = config
+dependencies = config headers
 nonfatal = true
 commands = {make} -C tools/testing/selftests all
     && {make} -i -C tools/testing/selftests install