share/mk/: Use a variable to prefix recursive make(1) output

Piping the output to sed(1) didn't behave well with -Orecurse.  Using a
variable behaves well, keeping output synchronized.  The length of the
variable name is specific, so that `$(INFO_)` uses exactly 8 characters,
a tab.

Signed-off-by: Alejandro Colomar <alx@kernel.org>

1 files changed, 157 insertions, 154 deletions

diff --git a/GNUmakefile b/GNUmakefile
index 21550ae7d..830a30fc1 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -35,90 +35,93 @@ DATAROOTDIR := $(srcdir)/share
 MAKEFILEDIR := $(DATAROOTDIR)/mk
 
 
+INFO_ :=
+
+
 .PHONY: all
 all: build;
 
 .PHONY: help
 help:
-	$(info	all			Alias for "build")
-	$(info	)
-	$(info	clean			Remove $$(builddir))
-	$(info	)
-	$(info	build			Wrapper for build-* targets)
-	$(info	)
-	$(info	build-book		Build the Linux Man Book (PDF))
-	$(info	)
-	$(info	build-pre		Preprocess man pages; alias for "build-pre-tbl")
-	$(info	build-pre-preconv	Preprocess man pages with preconv(1))
-	$(info	build-pre-tbl		Preprocess man pages with tbl(1))
-	$(info	)
-	$(info	build-catman		Build cat pages; alias for "build-catman-grotty")
-	$(info	build-catman-eqn	eqn(1) step of "build-catman")
-	$(info	build-catman-troff	Wrapper for build-catman-troff-* targets)
-	$(info	build-catman-troff-man	troff(1) step of "build-catman" for man(7) pages)
-	$(info	build-catman-troff-mdoc	troff(1) step of "build-catman" for mdoc(7) pages)
-	$(info	build-catman-grotty	grotty(1) step of "build-catman")
-	$(info	)
-	$(info	build-html		Build HTML manual pages)
-	$(info	html			Alias for "build-html")
-	$(info	)
-	$(info	build-pdf		Build PDF manual pages; alias for "build-pdf-grops")
-	$(info	build-pdf-eqn		eqn(1) step of "build-pdf")
-	$(info	build-pdf-troff		Wrapper for build-pdf-troff-* targets)
-	$(info	build-pdf-troff-man	troff(1) step of "build-pdf" for man(7) pages)
-	$(info	build-pdf-troff-mdoc	troff(1) step of "build-pdf" for mdoc(7) pages)
-	$(info	build-pdf-gropdf	gropdf(1) step of "build-pdf")
-	$(info	)
-	$(info	build-ps		Build PostScript manual pages; alias for "build-ps-grops")
-	$(info	build-ps-eqn		eqn(1) step of "build-ps")
-	$(info	build-ps-troff		Wrapper for build-ps-troff-* targets)
-	$(info	build-ps-troff-man	troff(1) step of "build-ps" for man(7) pages)
-	$(info	build-ps-troff-mdoc	troff(1) step of "build-ps" for mdoc(7) pages)
-	$(info	build-ps-grops		grops(1) step of "build-ps")
-	$(info	)
-	$(info	build-src		Alias for "build-src-ld")
-	$(info	build-src-c		Extract C programs from EXAMPLES)
-	$(info	build-src-cc		Compile C programs from EXAMPLES)
-	$(info	build-src-ld		Link C programs from EXAMPLES)
-	$(info	)
-	$(info	lint			Wrapper for "lint-c lint-man lint-mdoc")
-	$(info	lint-c			Wrapper for lint-c-* targets)
-	$(info	lint-c-checkpatch	Lint C programs from EXAMPLES with checkpatch(1))
-	$(info	lint-c-clang-tidy	Lint C programs from EXAMPLES with clang-tidy(1))
-	$(info	lint-c-cppcheck		Lint C programs from EXAMPLES with cppcheck(1))
-	$(info	lint-c-cpplint		Lint C programs from EXAMPLES with cpplint(1))
-	$(info	lint-c-iwyu		Lint C programs from EXAMPLES with iwyu(1))
-	$(info	lint-man		Wrapper for lint-man-* targets)
-	$(info	lint-man-mandoc		Lint man(7) pages with mandoc(1))
-	$(info	lint-man-tbl		Lint man(7) pages about '\" t' comment for tbl(1))
-	$(info	lint-mdoc		Wrapper for lint-mdoc-* targets)
-	$(info	lint-mdoc-mandoc	Lint mdoc(7) pages with mandoc(1))
-	$(info	)
-	$(info	check			Alias for "check-catman")
-	$(info	check-catman		Check cat pages; alias for "check-catman-grep")
-	$(info	check-catman-col	Filter cat pages with col(1))
-	$(info	check-catman-grep	Check cat pages with grep(1))
-	$(info	)
-	$(info	[un]install		Alias for "[un]install-man")
-	$(info	[un]install-man		Wrapper for [un]install-man* targets)
-	$(info	[un]install-manintro	[Un]install intro(*) man pages)
-	$(info	[un]install-man{1,...}	[Un]install man pages in the corresponding section)
-	$(info	)
-	$(info	[un]install-html	[Un]install HTML manual pages)
-	$(info	)
-	$(info	dist			Wrapper for dist-* targets)
-	$(info	dist-tar		Create a tarball of the repository)
-	$(info	dist-z			Wrapper for dist-z-* targets)
-	$(info	dist-z-bz2		Create a compressed tarball (.tar.bz2))
-	$(info	dist-z-gz		Create a compressed tarball (.tar.gz))
-	$(info	dist-z-lz		Create a compressed tarball (.tar.lz))
-	$(info	dist-z-xz		Create a compressed tarball (.tar.xz))
-	$(info	distcheck		Check the distribution tarball)
-	$(info	)
-	$(info	help			Print this help)
-	$(info	help-variables		Print all variables available, and their default values)
-	$(info	)
-	$(info	nothing			Make nothing.  It's useful for debug purposes)
+	$(info	$(INFO_)all			Alias for "build")
+	$(info	)
+	$(info	$(INFO_)clean			Remove $$(builddir))
+	$(info	)
+	$(info	$(INFO_)build			Wrapper for build-* targets)
+	$(info	)
+	$(info	$(INFO_)build-book		Build the Linux Man Book (PDF))
+	$(info	)
+	$(info	$(INFO_)build-pre		Preprocess man pages; alias for "build-pre-tbl")
+	$(info	$(INFO_)build-pre-preconv	Preprocess man pages with preconv(1))
+	$(info	$(INFO_)build-pre-tbl		Preprocess man pages with tbl(1))
+	$(info	)
+	$(info	$(INFO_)build-catman		Build cat pages; alias for "build-catman-grotty")
+	$(info	$(INFO_)build-catman-eqn	eqn(1) step of "build-catman")
+	$(info	$(INFO_)build-catman-troff	Wrapper for build-catman-troff-* targets)
+	$(info	$(INFO_)build-catman-troff-man	troff(1) step of "build-catman" for man(7) pages)
+	$(info	$(INFO_)build-catman-troff-mdoc	troff(1) step of "build-catman" for mdoc(7) pages)
+	$(info	$(INFO_)build-catman-grotty	grotty(1) step of "build-catman")
+	$(info	)
+	$(info	$(INFO_)build-html		Build HTML manual pages)
+	$(info	$(INFO_)html			Alias for "build-html")
+	$(info	)
+	$(info	$(INFO_)build-pdf		Build PDF manual pages; alias for "build-pdf-grops")
+	$(info	$(INFO_)build-pdf-eqn		eqn(1) step of "build-pdf")
+	$(info	$(INFO_)build-pdf-troff		Wrapper for build-pdf-troff-* targets)
+	$(info	$(INFO_)build-pdf-troff-man	troff(1) step of "build-pdf" for man(7) pages)
+	$(info	$(INFO_)build-pdf-troff-mdoc	troff(1) step of "build-pdf" for mdoc(7) pages)
+	$(info	$(INFO_)build-pdf-gropdf	gropdf(1) step of "build-pdf")
+	$(info	)
+	$(info	$(INFO_)build-ps		Build PostScript manual pages; alias for "build-ps-grops")
+	$(info	$(INFO_)build-ps-eqn		eqn(1) step of "build-ps")
+	$(info	$(INFO_)build-ps-troff		Wrapper for build-ps-troff-* targets)
+	$(info	$(INFO_)build-ps-troff-man	troff(1) step of "build-ps" for man(7) pages)
+	$(info	$(INFO_)build-ps-troff-mdoc	troff(1) step of "build-ps" for mdoc(7) pages)
+	$(info	$(INFO_)build-ps-grops		grops(1) step of "build-ps")
+	$(info	)
+	$(info	$(INFO_)build-src		Alias for "build-src-ld")
+	$(info	$(INFO_)build-src-c		Extract C programs from EXAMPLES)
+	$(info	$(INFO_)build-src-cc		Compile C programs from EXAMPLES)
+	$(info	$(INFO_)build-src-ld		Link C programs from EXAMPLES)
+	$(info	)
+	$(info	$(INFO_)lint			Wrapper for "lint-c lint-man lint-mdoc")
+	$(info	$(INFO_)lint-c			Wrapper for lint-c-* targets)
+	$(info	$(INFO_)lint-c-checkpatch	Lint C programs from EXAMPLES with checkpatch(1))
+	$(info	$(INFO_)lint-c-clang-tidy	Lint C programs from EXAMPLES with clang-tidy(1))
+	$(info	$(INFO_)lint-c-cppcheck		Lint C programs from EXAMPLES with cppcheck(1))
+	$(info	$(INFO_)lint-c-cpplint		Lint C programs from EXAMPLES with cpplint(1))
+	$(info	$(INFO_)lint-c-iwyu		Lint C programs from EXAMPLES with iwyu(1))
+	$(info	$(INFO_)lint-man		Wrapper for lint-man-* targets)
+	$(info	$(INFO_)lint-man-mandoc		Lint man(7) pages with mandoc(1))
+	$(info	$(INFO_)lint-man-tbl		Lint man(7) pages about '\" t' comment for tbl(1))
+	$(info	$(INFO_)lint-mdoc		Wrapper for lint-mdoc-* targets)
+	$(info	$(INFO_)lint-mdoc-mandoc	Lint mdoc(7) pages with mandoc(1))
+	$(info	)
+	$(info	$(INFO_)check			Alias for "check-catman")
+	$(info	$(INFO_)check-catman		Check cat pages; alias for "check-catman-grep")
+	$(info	$(INFO_)check-catman-col	Filter cat pages with col(1))
+	$(info	$(INFO_)check-catman-grep	Check cat pages with grep(1))
+	$(info	)
+	$(info	$(INFO_)[un]install		Alias for "[un]install-man")
+	$(info	$(INFO_)[un]install-man		Wrapper for [un]install-man* targets)
+	$(info	$(INFO_)[un]install-manintro	[Un]install intro(*) man pages)
+	$(info	$(INFO_)[un]install-man{1,...}	[Un]install man pages in the corresponding section)
+	$(info	)
+	$(info	$(INFO_)[un]install-html	[Un]install HTML manual pages)
+	$(info	)
+	$(info	$(INFO_)dist			Wrapper for dist-* targets)
+	$(info	$(INFO_)dist-tar		Create a tarball of the repository)
+	$(info	$(INFO_)dist-z			Wrapper for dist-z-* targets)
+	$(info	$(INFO_)dist-z-bz2		Create a compressed tarball (.tar.bz2))
+	$(info	$(INFO_)dist-z-gz		Create a compressed tarball (.tar.gz))
+	$(info	$(INFO_)dist-z-lz		Create a compressed tarball (.tar.lz))
+	$(info	$(INFO_)dist-z-xz		Create a compressed tarball (.tar.xz))
+	$(info	$(INFO_)distcheck		Check the distribution tarball)
+	$(info	)
+	$(info	$(INFO_)help			Print this help)
+	$(info	$(INFO_)help-variables		Print all variables available, and their default values)
+	$(info	)
+	$(info	$(INFO_)nothing			Make nothing.  It's useful for debug purposes)
 	$(info	)
 
 
@@ -133,81 +136,81 @@ $(MK):: ;
 
 .PHONY: help-variables
 help-variables:
-	$(info	LINK_PAGES	How to install link pages.  [".so", "symlink"])
-	$(info	Z		Install pages compressed.  ["", ".bz2", ".gz", ".lz", ".xz"])
-	$(info	)
-	$(info	DISTNAME	$$(git describe))
-	$(info	DISTVERSION	/$$DISTNAME/s/man-pages-//)
-	$(info	)
-	$(info	HIDE_ERR	Define to empty string to debug some errors)
-	$(info	)
-	$(info	# Directory variables:)
-	$(info	)
-	$(info	builddir	.tmp)
-	$(info	DESTDIR		)
-	$(info	prefix		/usr/local)
-	$(info	mandir		$$(datarootdir)/man)
-	$(info	docdir		$$(datarootdir)/doc)
-	$(info	)
-	$(info	man{1,...}dir	$$(mandir)/man{1,...})
-	$(info	man{1,...}ext	.{1,...})
-	$(info	)
-	$(info	htmldir		$$(docdir))
-	$(info	htmlext		.html)
-	$(info	)
-	$(info	# Command variables (and flags):)
-	$(info	)
-	$(info	-		MANWIDTH)
-	$(info	-		NROFF_OUT_DEVICE)
-	$(info	PRECONV		{EXTRA_,}PRECONVFLAGS)
-	$(info	TBL)
-	$(info	EQN		{EXTRA_,}EQNFLAGS)
-	$(info	TROFF		{EXTRA_,}TROFFFLAGS{,_MAN,_MDOC}	{EXTRA_,}NROFFFLAGS)
-	$(info	GROPDF		{EXTRA_,}GROPDFFLAGS)
-	$(info	GROPS		{EXTRA_,}GROPSFLAGS)
-	$(info	GROTTY		{EXTRA_,}GROTTYFLAGS)
-	$(info	COL		{EXTRA_,}COLFLAGS)
-	$(info	)
-	$(info	MANDOC		{EXTRA_,}MANDOCFLAGS)
-	$(info	MAN2HTML	{EXTRA_,}MAN2HTMLFLAGS)
-	$(info	)
-	$(info	BZIP2		{EXTRA_,}BZIP2FLAGS)
-	$(info	CP)
-	$(info	ECHO)
-	$(info	EXPR)
-	$(info	FIND)
-	$(info	GIT)
-	$(info	GZIP		{EXTRA_,}GZIPFLAGS)
-	$(info	HEAD)
-	$(info	LN)
-	$(info	LOCALE)
-	$(info	LZIP		{EXTRA_,}LZIPFLAGS)
-	$(info	PKGCONF)
-	$(info	SED)
-	$(info	SORTMAN)
-	$(info	SPONGE)
-	$(info	TAC)
-	$(info	TAIL)
-	$(info	TAR)
-	$(info	TEST)
-	$(info	XARGS)
-	$(info	XZ		{EXTRA_,}XZFLAGS)
-	$(info	)
-	$(info	INSTALL)
-	$(info	INSTALL_DATA)
-	$(info	MKDIR)
-	$(info	RM)
-	$(info	)
-	$(info	-		{EXTRA_,}CPPFLAGS)
-	$(info	CC		{EXTRA_,}CFLAGS)
-	$(info	LD		{EXTRA_,}LDFLAGS	{EXTRA_,}LDLIBS)
-	$(info	)
-	$(info	-		{EXTRA_,}CLANGFLAGS)
-	$(info	CHECKPATCH	{EXTRA_,}CHECKPATCHFLAGS)
-	$(info	CLANG-TIDY	{EXTRA_,}CLANG-TIDYFLAGS)
-	$(info	CPPCHECK	{EXTRA_,}CPPCHECKFLAGS)
-	$(info	CPPLINT		{EXTRA_,}CPPLINTFLAGS)
-	$(info	IWYU		{EXTRA_,}IWYUFLAGS)
+	$(info	$(INFO_)LINK_PAGES	How to install link pages.  [".so", "symlink"])
+	$(info	$(INFO_)Z		Install pages compressed.  ["", ".bz2", ".gz", ".lz", ".xz"])
+	$(info	)
+	$(info	$(INFO_)DISTNAME	$$(git describe))
+	$(info	$(INFO_)DISTVERSION	/$$DISTNAME/s/man-pages-//)
+	$(info	)
+	$(info	$(INFO_)HIDE_ERR	Define to empty string to debug some errors)
+	$(info	)
+	$(info	$(INFO_)# Directory variables:)
+	$(info	)
+	$(info	$(INFO_)builddir	.tmp)
+	$(info	$(INFO_)DESTDIR		)
+	$(info	$(INFO_)prefix		/usr/local)
+	$(info	$(INFO_)mandir		$$(datarootdir)/man)
+	$(info	$(INFO_)docdir		$$(datarootdir)/doc)
+	$(info	)
+	$(info	$(INFO_)man{1,...}dir	$$(mandir)/man{1,...})
+	$(info	$(INFO_)man{1,...}ext	.{1,...})
+	$(info	)
+	$(info	$(INFO_)htmldir		$$(docdir))
+	$(info	$(INFO_)htmlext		.html)
+	$(info	)
+	$(info	$(INFO_)# Command variables (and flags):)
+	$(info	)
+	$(info	$(INFO_)-		MANWIDTH)
+	$(info	$(INFO_)-		NROFF_OUT_DEVICE)
+	$(info	$(INFO_)PRECONV		{EXTRA_,}PRECONVFLAGS)
+	$(info	$(INFO_)TBL)
+	$(info	$(INFO_)EQN		{EXTRA_,}EQNFLAGS)
+	$(info	$(INFO_)TROFF		{EXTRA_,}TROFFFLAGS{,_MAN,_MDOC}	{EXTRA_,}NROFFFLAGS)
+	$(info	$(INFO_)GROPDF		{EXTRA_,}GROPDFFLAGS)
+	$(info	$(INFO_)GROPS		{EXTRA_,}GROPSFLAGS)
+	$(info	$(INFO_)GROTTY		{EXTRA_,}GROTTYFLAGS)
+	$(info	$(INFO_)COL		{EXTRA_,}COLFLAGS)
+	$(info	)
+	$(info	$(INFO_)MANDOC		{EXTRA_,}MANDOCFLAGS)
+	$(info	$(INFO_)MAN2HTML	{EXTRA_,}MAN2HTMLFLAGS)
+	$(info	)
+	$(info	$(INFO_)BZIP2		{EXTRA_,}BZIP2FLAGS)
+	$(info	$(INFO_)CP)
+	$(info	$(INFO_)ECHO)
+	$(info	$(INFO_)EXPR)
+	$(info	$(INFO_)FIND)
+	$(info	$(INFO_)GIT)
+	$(info	$(INFO_)GZIP		{EXTRA_,}GZIPFLAGS)
+	$(info	$(INFO_)HEAD)
+	$(info	$(INFO_)LN)
+	$(info	$(INFO_)LOCALE)
+	$(info	$(INFO_)LZIP		{EXTRA_,}LZIPFLAGS)
+	$(info	$(INFO_)PKGCONF)
+	$(info	$(INFO_)SED)
+	$(info	$(INFO_)SORTMAN)
+	$(info	$(INFO_)SPONGE)
+	$(info	$(INFO_)TAC)
+	$(info	$(INFO_)TAIL)
+	$(info	$(INFO_)TAR)
+	$(info	$(INFO_)TEST)
+	$(info	$(INFO_)XARGS)
+	$(info	$(INFO_)XZ		{EXTRA_,}XZFLAGS)
+	$(info	)
+	$(info	$(INFO_)INSTALL)
+	$(info	$(INFO_)INSTALL_DATA)
+	$(info	$(INFO_)MKDIR)
+	$(info	$(INFO_)RM)
+	$(info	)
+	$(info	$(INFO_)-		{EXTRA_,}CPPFLAGS)
+	$(info	$(INFO_)CC		{EXTRA_,}CFLAGS)
+	$(info	$(INFO_)LD		{EXTRA_,}LDFLAGS	{EXTRA_,}LDLIBS)
+	$(info	)
+	$(info	$(INFO_)-		{EXTRA_,}CLANGFLAGS)
+	$(info	$(INFO_)CHECKPATCH	{EXTRA_,}CHECKPATCHFLAGS)
+	$(info	$(INFO_)CLANG-TIDY	{EXTRA_,}CLANG-TIDYFLAGS)
+	$(info	$(INFO_)CPPCHECK	{EXTRA_,}CPPCHECKFLAGS)
+	$(info	$(INFO_)CPPLINT		{EXTRA_,}CPPLINTFLAGS)
+	$(info	$(INFO_)IWYU		{EXTRA_,}IWYUFLAGS)
 	$(info	)