[Buildroot] [PATCH v3 01/16] package/pkg-python: fix PKG_PYTHON_FIXUP_SYSCONFIGDATA

[Herve Codina <herve.codina@bootlin.com>]

Find used by PKG_PYTHON_FIXUP_SYSCONFIGDATA can fail if directories
are not present. This failure is silently ignored because find is
on the LHS of a pipe.

This commit fixes the find failure. HOST_DIR is used as the starting
point and the search is filtered on the expected directories.

This commit also adds -print0 and the $(Q) verbosity flag as minor
changes.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---

New patch in this v3 series.

The find failure was highlighted in 836528f03eb89fdc64432f7a7470145ddf553b8c
and reverted in b928074e2d83f5b873bf1ba381b212dfad9bf207.

 package/pkg-python.mk | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/package/pkg-python.mk b/package/pkg-python.mk
index 59a48e5a87..cd48402e02 100644
--- a/package/pkg-python.mk
+++ b/package/pkg-python.mk
@@ -92,11 +92,22 @@ HOST_PKG_PYTHON_SETUPTOOLS_INSTALL_OPTS = \
 	--root=/ \
 	--single-version-externally-managed
 
+# Make sure python _sysconfigdata*.py files only reference the current
+# per-package directory.
+#
+# Can't use $(foreach d, $(HOST_DIR)/lib/python* $(STAGING_DIR)/usr/lib/python*, ...)
+# because those directories may be created in the same recipe this macro will
+# be expanded in.
+# Additionally, either or both may be missing, which would make find whine and
+# fail.
+# So we just use HOST_DIR as a starting point, and filter on the two directories
+# of interest.
 ifeq ($(BR2_PER_PACKAGE_DIRECTORIES),y)
 define PKG_PYTHON_FIXUP_SYSCONFIGDATA
-	find $(HOST_DIR)/lib/python* $(STAGING_DIR)/usr/lib/python* \
-		-name "_sysconfigdata*.py" | xargs --no-run-if-empty \
-		$(SED) "s:$(PER_PACKAGE_DIR)/[^/]\+/:$(PER_PACKAGE_DIR)/$($(PKG)_NAME)/:g"
+	$(Q)find $(HOST_DIR) \
+		\( -path '$(HOST_DIR)/lib/python*' -o -path '$(STAGING_DIR)/usr/lib/python*' \) \
+		-name "_sysconfigdata*.py" -print0 | xargs -0 --no-run-if-empty \
+		$(SED) 's:$(PER_PACKAGE_DIR)/[^/]\+/:$(PER_PACKAGE_DIR)/$($(PKG)_NAME)/:g'
 endef
 endif
 
-- 
2.31.1

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