git

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### Remove GNU make implicit rules
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## This speeds things up since we don't need to look for and stat() a
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## "foo.c,v" every time a rule referring to "foo.c" is in play. See
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## "make -p -f/dev/null | grep ^%::'".
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%:: %,v
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%:: RCS/%,v
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%:: RCS/%
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%:: s.%
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%:: SCCS/s.%
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## Likewise delete default $(SUFFIXES). See:
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##
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##     info make --index-search=.SUFFIXES
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.SUFFIXES:
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### Flags affecting all rules
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# A GNU make extension since gmake 3.72 (released in late 1994) to
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# remove the target of rules if commands in those rules fail. The
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# default is to only do that if make itself receives a signal. Affects
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# all targets, see:
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#
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#    info make --index-search=.DELETE_ON_ERROR
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.DELETE_ON_ERROR:
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### Global variables
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## comma, empty, space: handy variables as these tokens are either
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## special or can be hard to spot among other Makefile syntax.
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comma := ,
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empty :=
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space := $(empty) $(empty)
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### Quieting
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## common
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QUIET_SUBDIR0  = +$(MAKE) -C # space to separate -C and subdir
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QUIET_SUBDIR1  =
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ifneq ($(findstring w,$(firstword -$(MAKEFLAGS))),w)
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PRINT_DIR = --no-print-directory
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else # "make -w"
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NO_SUBDIR = :
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endif
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ifneq ($(findstring s,$(firstword -$(MAKEFLAGS))),s)
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ifndef V
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## common
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	QUIET_SUBDIR0  = +@subdir=
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	QUIET_SUBDIR1  = ;$(NO_SUBDIR) echo '   ' SUBDIR $$subdir; \
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			 $(MAKE) $(PRINT_DIR) -C $$subdir
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	QUIET          = @
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	QUIET_GEN      = @echo '   ' GEN $@;
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	QUIET_MKDIR_P_PARENT  = @echo '   ' MKDIR -p $(@D);
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## Used in "Makefile"
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	QUIET_CC       = @echo '   ' CC $@;
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	QUIET_AR       = @echo '   ' AR $@;
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	QUIET_LINK     = @echo '   ' LINK $@;
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	QUIET_BUILT_IN = @echo '   ' BUILTIN $@;
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	QUIET_CP       = @echo '   ' CP $< $@;
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	QUIET_LNCP     = @echo '   ' LN/CP $@;
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	QUIET_XGETTEXT = @echo '   ' XGETTEXT $@;
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	QUIET_MSGINIT  = @echo '   ' MSGINIT $@;
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	QUIET_MSGFMT   = @echo '   ' MSGFMT $@;
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	QUIET_MSGMERGE = @echo '   ' MSGMERGE $@;
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	QUIET_GCOV     = @echo '   ' GCOV $@;
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	QUIET_SP       = @echo '   ' SP $<;
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	QUIET_HDR      = @echo '   ' HDR $(<:hcc=h);
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	QUIET_RC       = @echo '   ' RC $@;
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## Used in "Makefile": SPATCH
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	QUIET_SPATCH			= @echo '   ' SPATCH $< \>$@;
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	QUIET_SPATCH_TEST		= @echo '   ' SPATCH TEST $(@:.build/%=%);
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	QUIET_SPATCH_CAT		= @echo '   ' SPATCH CAT $(@:%.patch=%.d/)\*\*.patch \>$@;
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## Used in "Documentation/Makefile"
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	QUIET_ASCIIDOC	= @echo '   ' ASCIIDOC $@;
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	QUIET_XMLTO	= @echo '   ' XMLTO $@;
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	QUIET_DB2TEXI	= @echo '   ' DB2TEXI $@;
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	QUIET_MAKEINFO	= @echo '   ' MAKEINFO $@;
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	QUIET_DBLATEX	= @echo '   ' DBLATEX $@;
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	QUIET_XSLTPROC	= @echo '   ' XSLTPROC $@;
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	QUIET_GEN	= @echo '   ' GEN $@;
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	QUIET_STDERR	= 2> /dev/null
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	QUIET_LINT_GITLINK	= @echo '   ' LINT GITLINK $<;
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	QUIET_LINT_MANSEC	= @echo '   ' LINT MAN SEC $<;
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	QUIET_LINT_MANEND	= @echo '   ' LINT MAN END $<;
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	export V
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endif
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endif
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### Templates
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## mkdir_p_parent: lazily "mkdir -p" the path needed for a $@
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## file. Uses $(wildcard) to avoid the "mkdir -p" if it's not
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## needed.
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##
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## Is racy, but in a good way; we might redundantly (and safely)
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## "mkdir -p" when running in parallel, but won't need to exhaustively create
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## individual rules for "a" -> "prefix" -> "dir" -> "file" if given a
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## "a/prefix/dir/file". This can instead be inserted at the start of
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## the "a/prefix/dir/file" rule.
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define mkdir_p_parent_template
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$(if $(wildcard $(@D)),,$(QUIET_MKDIR_P_PARENT)$(shell mkdir -p $(@D)))
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endef
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## Getting sick of writing -L$(SOMELIBDIR) $(CC_LD_DYNPATH)$(SOMELIBDIR)?
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## Write $(call libpath_template,$(SOMELIBDIR)) instead, perhaps?
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## With CC_LD_DYNPATH set to either an empty string or to "-L", the
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## the directory is not shown the second time.
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define libpath_template
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-L$(1) $(if $(filter-out -L,$(CC_LD_DYNPATH)),$(CC_LD_DYNPATH)$(1))
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endef
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