[U-Boot] [PATCH] Makefile: always preserve output for images that can contain HAB Blocks

[Rasmus Villemoes]

The current makefile logic disables creation of the
SPL.log/u-boot-ivt.img.log etc. files when V=1 is given on the command
line, the rationale presumably being that the user wants and gets the
information on the console.

However, from general principles, I don't think a higher V= level
should affect which build artifacts get generated (and certainly
shouldn't produce fewer). Concretely, it's also a problem that when
doing a V=1 build in a terminal, the relevant HAB blocks lines easily
drown in all the other V=1 output. And build systems such as Yocto by
default pass V=1, so in that case the information gets hidden away in
the do_compile log file, making it nigh impossible to create a recipe
for creating signed U-boot images.

So change the logic so that for V=0, the mkimage output is redirected
to MKIMAGEOUTPUT (which is also the current behaviour), while for any
other value of V, we _additionally_ write the information to make's
stdout, whatever that might be.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes at prevas.dk>
---
My first attempt did

	$(if $(KBUILD_VERBOSE:0=), | tee , >) $(MKIMAGEOUTPUT)

but we can't use a pipeline, since tee is always succesful, so we
would not propagate errors from mkimage.

 Makefile             | 4 ++--
 scripts/Makefile.lib | 2 +-
 scripts/Makefile.spl | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index 50abc979ad..2eb1b1a22f 100644
--- a/Makefile
+++ b/Makefile
@@ -840,11 +840,11 @@ MKIMAGEOUTPUT ?= /dev/null
 
 quiet_cmd_mkimage = MKIMAGE $@
 cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
-	$(if $(KBUILD_VERBOSE:1=), >$(MKIMAGEOUTPUT))
+	>$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))
 
 quiet_cmd_mkfitimage = MKIMAGE $@
 cmd_mkfitimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -f $(U_BOOT_ITS) -E $@ \
-	$(if $(KBUILD_VERBOSE:1=), >$(MKIMAGEOUTPUT))
+	>$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))
 
 quiet_cmd_cat = CAT     $@
 cmd_cat = cat $(filter-out $(PHONY), $^) > $@
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 8f21653136..c6b3f69064 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -521,7 +521,7 @@ cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
 MKIMAGEOUTPUT ?= /dev/null
 quiet_cmd_mkimage = MKIMAGE $@
 cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
-	$(if $(KBUILD_VERBOSE:1=), >$(MKIMAGEOUTPUT))
+	>$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))
 
 # fdtgrep
 # ---------------------------------------------------------------------------
diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl
index 2993ade41e..7f2908d799 100644
--- a/scripts/Makefile.spl
+++ b/scripts/Makefile.spl
@@ -144,7 +144,7 @@ MKIMAGEOUTPUT ?= /dev/null
 
 quiet_cmd_mkimage = MKIMAGE $@
 cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
-	$(if $(KBUILD_VERBOSE:1=), >$(MKIMAGEOUTPUT))
+	>$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))
 
 MKIMAGEFLAGS_MLO = -T omapimage -a $(CONFIG_SPL_TEXT_BASE)
 
-- 
2.15.1