package/jailhouse: fix build when python helper scripts are enabled

When compiling jailhouse with BR2_PACKAGE_JAILHOUSE_HELPER_SCRIPTS=y,
build is failing with error:

    Traceback (most recent call last):
      File "/buildroot/output/build/jailhouse-e57d1eff6d55aeed5f977fe4e2acfb6ccbdd7560/setup.py", line 18, in <module>
        setup(name="pyjailhouse", version=version,
      File "/buildroot/output/host/lib/python3.12/site-packages/setuptools/__init__.py", line 108, in setup
        return distutils.core.setup(**attrs)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      ...
      File "/buildroot/output/host/lib/python3.12/sysconfig.py", line 549, in _init_posix
        _temp = __import__(name, globals(), locals(), ['build_time_vars'], 0)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ValueError: Empty module name

This is due to a missing dependency on the target python3 package.

Jailhouse Python scripts are using setuptools with host-python3 which
reads its sysconfig data from the target-python3. See:
https://gitlab.com/buildroot.org/buildroot/-/blob/2024.08.1/package/pkg-python.mk?ref_type=tags#L33

If the target python3 is not installed, this get expanded as an empty
string, leading to this "ValueError: Empty module name" error.

Pure Python packages which are using the python-package infrastructure
usually get this dependency automatically from:
https://gitlab.com/buildroot.org/buildroot/-/blob/2024.08.1/package/pkg-python.mk?ref_type=tags#L295

Here, the jailhouse package rather uses the generic-package
infrastructure, then installs the Python scripts (if enabled) with
dedicated macros. This is why the target python3 is needed.

This commit fixes the issue by adding this missing dependency.

Signed-off-by: Julien Olivain <[email protected]>
Signed-off-by: Thomas Petazzoni <[email protected]>

diff --git a/package/jailhouse/jailhouse.mk b/package/jailhouse/jailhouse.mk
index 1354acf600ce02e2292c4c5a9c2027bfc99530d5..a1c86f0e91a4812078b7d3974e13d7fc5b266d6c 100644 (file)
--- a/package/jailhouse/jailhouse.mk
+++ b/package/jailhouse/jailhouse.mk
@@ -21,7 +21,8 @@ JAILHOUSE_MAKE_OPTS = \
 ifeq ($(BR2_PACKAGE_JAILHOUSE_HELPER_SCRIPTS),y)
 JAILHOUSE_DEPENDENCIES += \
        host-python-mako \
-       host-python-setuptools
+       host-python-setuptools \
+       python3
 JAILHOUSE_MAKE_OPTS += \
        HAS_PYTHON_MAKO="yes" \
        PYTHON_PIP_USABLE="yes"