1 files changed, 4 insertions, 2 deletions

diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include
index 2964b96aa55f..f03e681f8891 100644
--- a/tools/scripts/Makefile.include
+++ b/tools/scripts/Makefile.include
@@ -1,3 +1,4 @@
+ifneq ($(O),)
 ifeq ($(origin O), command line)
         dummy := $(if $(shell test -d $(O) || echo $(O)),$(error O=$(O) does not exist),)
         ABSOLUTE_O := $(shell cd $(O) ; pwd)
@@ -7,9 +8,10 @@ ifeq ($(objtree),)
         objtree := $(O)
 endif
 endif
+endif
 
-ifneq ($(OUTPUT),)
 # check that the output directory actually exists
+ifneq ($(OUTPUT),)
 OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
 $(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
 endif
@@ -70,7 +72,7 @@ ifndef V
         QUIET_BISON    = @echo '   ' BISON $@;
 
         descend = \
-                @echo '   ' DESCEND $(1); \
+                +@echo '   ' DESCEND $(1); \
                 mkdir -p $(OUTPUT)$(1) && \
                 $(MAKE) $(COMMAND_O) subdir=$(if $(subdir),$(subdir)/$(1),$(1)) $(PRINT_DIR) -C $(1) $(2)
 endif