[Buildroot] [PATCH v7 17/18] core: add check-leaks-in-{target, host, staging} targets

[Samuel Martin]

This new targets allow identifying what need to be fixed to fulfill the
ultimate goal of removing any trace of the host in the target filesystem
or the SDK.

Signed-off-by: Samuel Martin <s.martin49 at gmail.com>

---
changes v6->v7:
- none

changes v5->v6:
- new patch
---
 Makefile             | 15 +++++++++++++++
 package/pkg-utils.mk |  5 +++++
 2 files changed, 20 insertions(+)

diff --git a/Makefile b/Makefile
index e4e9c65..45e8d41 100644
--- a/Makefile
+++ b/Makefile
@@ -616,6 +616,21 @@ endef
 TARGET_FINALIZE_HOOKS += PURGE_LOCALES
 endif
 
+# Checks for build machine leaks into target filesystem, SDK
+check-leaks-in-target:
+	@$(call MESSAGE,Checking leaks in the target)
+	$(Q)$(call check-for-build-machine-leaks-in,$(TARGET_DIR))
+
+check-leaks-in-host:
+	@$(call MESSAGE,Checking leaks in the host)
+	$(Q)$(call check-for-build-machine-leaks-in,$(HOST_DIR))
+
+check-leaks-in-staging:
+	@$(call MESSAGE,Checking leaks in the staging)
+	$(Q)$(call check-for-build-machine-leaks-in,$(STAGING_DIR))
+
+check-leaks:	check-leaks-in-target check-leaks-in-host check-leaks-in-staging
+
 # RPATH fixing
 # - The host hook sets RPATH in host ELF binaries, using relative paths to the
 #   library locations.
diff --git a/package/pkg-utils.mk b/package/pkg-utils.mk
index f88313a..6a2cbb6 100644
--- a/package/pkg-utils.mk
+++ b/package/pkg-utils.mk
@@ -150,3 +150,8 @@ define legal-license-file # pkg, filename, file-fullpath, {HOST|TARGET}
 	mkdir -p $(LICENSE_FILES_DIR_$(4))/$(1)/$(dir $(2)) && \
 	cp $(3) $(LICENSE_FILES_DIR_$(4))/$(1)/$(2)
 endef
+
+define check-for-build-machine-leaks-in
+	$(TOPDIR)/support/scripts/check-host-leaks $(1) \
+		$(TOPDIR) $(BASE_DIR) $(HOST_DIR) $(STAGING_DIR)
+endef
-- 
2.7.2