[PATCH v4 8/9] Makefile: use $(wspfx) for $(QUIET...) in shared.mak

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Change the mostly move-only change in the preceding commit to use the
$(wspfx) variable for defining the QUIET padding. This refactoring
will make it easier to emit that exact amount of padding in functions
that we might add to shared.mak in the future.

Such a function is not part of this patch series, but a
"TRACK_template" that I'd like to add as a follow-up to it makes use
of this. Let's make this change now while modifying these QUIET rules
is fresh in our minds.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 shared.mak | 54 ++++++++++++++++++++++++++++++------------------------
 1 file changed, 30 insertions(+), 24 deletions(-)

diff --git a/shared.mak b/shared.mak
index c45b2812eb6..bb910273538 100644
--- a/shared.mak
+++ b/shared.mak
@@ -32,6 +32,12 @@ comma := ,
 empty :=
 space := $(empty) $(empty)
 
+## wspfx: the whitespace prefix padding for $(QUIET...) and similarly
+## aligned output.
+wspfx = $(space)$(space)$(space)
+wspfx_SQ = '$(subst ','\'',$(wspfx))'
+# ' closing quote to appease Emacs make-mode.elxo
+
 ### Quieting
 ## common
 QUIET_SUBDIR0  = +$(MAKE) -C # space to separate -C and subdir
@@ -47,39 +53,39 @@ ifneq ($(findstring s,$(MAKEFLAGS)),s)
 ifndef V
 ## common
 	QUIET_SUBDIR0  = +@subdir=
-	QUIET_SUBDIR1  = ;$(NO_SUBDIR) echo '   ' SUBDIR $$subdir; \
+	QUIET_SUBDIR1  = ;$(NO_SUBDIR) echo $(wspfx_SQ) SUBDIR $$subdir; \
 			 $(MAKE) $(PRINT_DIR) -C $$subdir
 
 	QUIET          = @
-	QUIET_GEN      = @echo '   ' GEN $@;
+	QUIET_GEN      = @echo $(wspfx_SQ) GEN $@;
 
 ## Used in "Makefile"
-	QUIET_CC       = @echo '   ' CC $@;
-	QUIET_AR       = @echo '   ' AR $@;
-	QUIET_LINK     = @echo '   ' LINK $@;
-	QUIET_BUILT_IN = @echo '   ' BUILTIN $@;
-	QUIET_LNCP     = @echo '   ' LN/CP $@;
-	QUIET_XGETTEXT = @echo '   ' XGETTEXT $@;
-	QUIET_MSGFMT   = @echo '   ' MSGFMT $@;
-	QUIET_GCOV     = @echo '   ' GCOV $@;
-	QUIET_SP       = @echo '   ' SP $<;
-	QUIET_HDR      = @echo '   ' HDR $(<:hcc=h);
-	QUIET_RC       = @echo '   ' RC $@;
-	QUIET_SPATCH   = @echo '   ' SPATCH $<;
+	QUIET_CC       = @echo $(wspfx_SQ) CC $@;
+	QUIET_AR       = @echo $(wspfx_SQ) AR $@;
+	QUIET_LINK     = @echo $(wspfx_SQ) LINK $@;
+	QUIET_BUILT_IN = @echo $(wspfx_SQ) BUILTIN $@;
+	QUIET_LNCP     = @echo $(wspfx_SQ) LN/CP $@;
+	QUIET_XGETTEXT = @echo $(wspfx_SQ) XGETTEXT $@;
+	QUIET_MSGFMT   = @echo $(wspfx_SQ) MSGFMT $@;
+	QUIET_GCOV     = @echo $(wspfx_SQ) GCOV $@;
+	QUIET_SP       = @echo $(wspfx_SQ) SP $<;
+	QUIET_HDR      = @echo $(wspfx_SQ) HDR $(<:hcc=h);
+	QUIET_RC       = @echo $(wspfx_SQ) RC $@;
+	QUIET_SPATCH   = @echo $(wspfx_SQ) SPATCH $<;
 
 ## Used in "Documentation/Makefile"
-	QUIET_ASCIIDOC	= @echo '   ' ASCIIDOC $@;
-	QUIET_XMLTO	= @echo '   ' XMLTO $@;
-	QUIET_DB2TEXI	= @echo '   ' DB2TEXI $@;
-	QUIET_MAKEINFO	= @echo '   ' MAKEINFO $@;
-	QUIET_DBLATEX	= @echo '   ' DBLATEX $@;
-	QUIET_XSLTPROC	= @echo '   ' XSLTPROC $@;
-	QUIET_GEN	= @echo '   ' GEN $@;
+	QUIET_ASCIIDOC	= @echo $(wspfx_SQ) ASCIIDOC $@;
+	QUIET_XMLTO	= @echo $(wspfx_SQ) XMLTO $@;
+	QUIET_DB2TEXI	= @echo $(wspfx_SQ) DB2TEXI $@;
+	QUIET_MAKEINFO	= @echo $(wspfx_SQ) MAKEINFO $@;
+	QUIET_DBLATEX	= @echo $(wspfx_SQ) DBLATEX $@;
+	QUIET_XSLTPROC	= @echo $(wspfx_SQ) XSLTPROC $@;
+	QUIET_GEN	= @echo $(wspfx_SQ) GEN $@;
 	QUIET_STDERR	= 2> /dev/null
 
-	QUIET_LINT_GITLINK	= @echo '   ' LINT GITLINK $<;
-	QUIET_LINT_MANSEC	= @echo '   ' LINT MAN SEC $<;
-	QUIET_LINT_MANEND	= @echo '   ' LINT MAN END $<;
+	QUIET_LINT_GITLINK	= @echo $(wspfx_SQ) LINT GITLINK $<;
+	QUIET_LINT_MANSEC	= @echo $(wspfx_SQ) LINT MAN SEC $<;
+	QUIET_LINT_MANEND	= @echo $(wspfx_SQ) LINT MAN END $<;
 
 	export V
 endif
-- 
2.35.1.1228.g56895c6ee86