--- /dev/null
+--- zfs-zfs-0.8.1/config/zfs-build.m4.orig 2019-06-14 18:43:18.000000000 +0200
++++ zfs-zfs-0.8.1/config/zfs-build.m4 2019-07-17 16:03:44.885415916 +0200
+@@ -110,7 +110,7 @@
+ [enable_debug_kmem=no])
+
+ AS_IF([test "x$enable_debug_kmem" = xyes], [
+- KERNEL_DEBUG_CPPFLAGS+=" -DDEBUG_KMEM"
++ KERNEL_DEBUG_CPPFLAGS="$KERNEL_DEBUG_CPPFLAGS -DDEBUG_KMEM"
+ DEBUG_KMEM_ZFS="_with_debug_kmem"
+ ], [
+ DEBUG_KMEM_ZFS="_without_debug_kmem"
+@@ -140,7 +140,7 @@
+ [enable_debug_kmem_tracking=no])
+
+ AS_IF([test "x$enable_debug_kmem_tracking" = xyes], [
+- KERNEL_DEBUG_CPPFLAGS+=" -DDEBUG_KMEM_TRACKING"
++ KERNEL_DEBUG_CPPFLAGS="$KERNEL_DEBUG_CPPFLAGS -DDEBUG_KMEM_TRACKING"
+ DEBUG_KMEM_TRACKING_ZFS="_with_debug_kmem_tracking"
+ ], [
+ DEBUG_KMEM_TRACKING_ZFS="_without_debug_kmem_tracking"
+@@ -242,10 +242,10 @@
+ ])
+
+ RPM_DEFINE_COMMON='--define "$(DEBUG_ZFS) 1"'
+- RPM_DEFINE_COMMON+=' --define "$(DEBUG_KMEM_ZFS) 1"'
+- RPM_DEFINE_COMMON+=' --define "$(DEBUG_KMEM_TRACKING_ZFS) 1"'
+- RPM_DEFINE_COMMON+=' --define "$(DEBUGINFO_ZFS) 1"'
+- RPM_DEFINE_COMMON+=' --define "$(ASAN_ZFS) 1"'
++ RPM_DEFINE_COMMON="$RPM_DEFINE_COMMON"' --define "$(DEBUG_KMEM_ZFS) 1"'
++ RPM_DEFINE_COMMON="$RPM_DEFINE_COMMON"' --define "$(DEBUG_KMEM_TRACKING_ZFS) 1"'
++ RPM_DEFINE_COMMON="$RPM_DEFINE_COMMON"' --define "$(DEBUGINFO_ZFS) 1"'
++ RPM_DEFINE_COMMON="$RPM_DEFINE_COMMON"' --define "$(ASAN_ZFS) 1"'
+
+ RPM_DEFINE_UTIL=' --define "_initconfdir $(DEFAULT_INITCONF_DIR)"'
+
+@@ -258,16 +258,16 @@
+ RPM_DEFINE_UTIL='--define "_dracutdir $(dracutdir)"'
+ ])
+ AS_IF([test -n "$udevdir" ], [
+- RPM_DEFINE_UTIL+=' --define "_udevdir $(udevdir)"'
++ RPM_DEFINE_UTIL="$RPM_DEFINE_UTIL"' --define "_udevdir $(udevdir)"'
+ ])
+ AS_IF([test -n "$udevruledir" ], [
+- RPM_DEFINE_UTIL+=' --define "_udevdir $(udevruledir)"'
++ RPM_DEFINE_UTIL="$RPM_DEFINE_UTIL"' --define "_udevdir $(udevruledir)"'
+ ])
+- RPM_DEFINE_UTIL+=' $(DEFINE_INITRAMFS)'
+- RPM_DEFINE_UTIL+=' $(DEFINE_SYSTEMD)'
+- RPM_DEFINE_UTIL+=' $(DEFINE_PYZFS)'
+- RPM_DEFINE_UTIL+=' $(DEFINE_PYTHON_VERSION)'
+- RPM_DEFINE_UTIL+=' $(DEFINE_PYTHON_PKG_VERSION)'
++ RPM_DEFINE_UTIL="$RPM_DEFINE_UTIL"' $(DEFINE_INITRAMFS)'
++ RPM_DEFINE_UTIL="$RPM_DEFINE_UTIL"' $(DEFINE_SYSTEMD)'
++ RPM_DEFINE_UTIL="$RPM_DEFINE_UTIL"' $(DEFINE_PYZFS)'
++ RPM_DEFINE_UTIL="$RPM_DEFINE_UTIL"' $(DEFINE_PYTHON_VERSION)'
++ RPM_DEFINE_UTIL="$RPM_DEFINE_UTIL"' $(DEFINE_PYTHON_PKG_VERSION)'
+
+ dnl # Override default lib directory on Debian/Ubuntu systems. The
+ dnl # provided /usr/lib/rpm/platform/<arch>/macros files do not
+@@ -279,14 +279,14 @@
+ dnl #
+ AS_IF([test "$DEFAULT_PACKAGE" = "deb"], [
+ MULTIARCH_LIBDIR="lib/$(dpkg-architecture -qDEB_HOST_MULTIARCH)"
+- RPM_DEFINE_UTIL+=' --define "_lib $(MULTIARCH_LIBDIR)"'
++ RPM_DEFINE_UTIL="$RPM_DEFINE_UTIL"' --define "_lib $(MULTIARCH_LIBDIR)"'
+ AC_SUBST(MULTIARCH_LIBDIR)
+ ])
+
+ RPM_DEFINE_KMOD='--define "kernels $(LINUX_VERSION)"'
+- RPM_DEFINE_KMOD+=' --define "ksrc $(LINUX)"'
+- RPM_DEFINE_KMOD+=' --define "kobj $(LINUX_OBJ)"'
+- RPM_DEFINE_KMOD+=' --define "_wrong_version_format_terminate_build 0"'
++ RPM_DEFINE_KMOD="$RPM_DEFINE_KMOD"' --define "ksrc $(LINUX)"'
++ RPM_DEFINE_KMOD="$RPM_DEFINE_KMOD"' --define "kobj $(LINUX_OBJ)"'
++ RPM_DEFINE_KMOD="$RPM_DEFINE_KMOD"' --define "_wrong_version_format_terminate_build 0"'
+
+ RPM_DEFINE_DKMS=''
+