debian/changelog

+samba (2:4.11.0+dfsg-6) unstable; urgency=medium
+
+  * Do not run waf configure in parallel. Fix FTBFS on arm (Closes: #941467)
+
+ -- Mathieu Parent <sathieu@debian.org>  Tue, 01 Oct 2019 22:35:36 +0200
+
 samba (2:4.11.0+dfsg-5) experimental; urgency=medium
 
   * d/gitlabracadabra.yml: only_allow_merge_if_pipeline_succeeds: false

debian/rules

@@ -25,6 +25,7 @@ export PYSHORT=python3
 export PYTHON=$(shell which $(PYSHORT))
 export PYTHON_CONFIG="$(PYTHON)-config"
 WAF = $(PYTHON) ./buildtools/bin/waf -v
+WAF_NO_PARALLEL = $(WAF)
 
 # wrapper around cups-config, to work around #726726
 export PATH:=$(CURDIR)/debian/bin:$(PATH)
@@ -98,7 +99,7 @@ endif
 	dh $* --with python3
 
 override_dh_auto_configure:
-	$(WAF) configure $(conf_args)
+	$(WAF_NO_PARALLEL) configure $(conf_args)
 
 override_dh_auto_build:
 	DESTDIR="$(DESTDIR)" $(WAF)