meson: Work around determinism issue

The meson determinism issue is the same frozenset issue we encountered with
python itself. Remove the problematic pyc file until upstream work out the
best way to address the issue (as with core python).

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/meta/recipes-devtools/meson/meson.inc b/meta/recipes-devtools/meson/meson.inc
index 8454d18c28..fc3ca85fae 100644
--- a/meta/recipes-devtools/meson/meson.inc
+++ b/meta/recipes-devtools/meson/meson.inc
@@ -23,6 +23,10 @@ SRC_URI_append_class-native = " \
     file://0002-Support-building-allarch-recipes-again.patch \
 "
 
+# remove at next version upgrade or when output changes
+PR = "r1"
+HASHEQUIV_HASH_VERSION .= ".1"
+
 UPSTREAM_CHECK_URI = "https://github.com/mesonbuild/meson/releases"
 UPSTREAM_CHECK_REGEX = "meson-(?P<pver>\d+(\.\d+)+)\.tar"
 
@@ -31,3 +35,13 @@ inherit setuptools3
 RDEPENDS_${PN} = "ninja python3-modules python3-pkg-resources"
 
 FILES_${PN} += "${datadir}/polkit-1"
+
+do_install_append () {
+	# As per the same issue in the python recipe itself:
+	# Unfortunately the following pyc files are non-deterministc due to 'frozenset'
+	# being written without strict ordering, even with PYTHONHASHSEED = 0
+	# Upstream is discussing ways to solve the issue properly, until then let's
+	# just not install the problematic files.
+	# More info: http://benno.id.au/blog/2013/01/15/python-determinism
+	rm ${D}${libdir}/python*/site-packages/mesonbuild/dependencies/__pycache__/mpi.cpython*
+}