shared.mak

   1 ### Remove GNU make implicit rules
   2
   3 ## This speeds things up since we don't need to look for and stat() a
   4 ## "foo.c,v" every time a rule referring to "foo.c" is in play. See
   5 ## "make -p -f/dev/null | grep ^%::'".
   6 %:: %,v
   7 %:: RCS/%,v
   8 %:: RCS/%
   9 %:: s.%
  10 %:: SCCS/s.%
  11
  12 ## Likewise delete default $(SUFFIXES). See:
  13 ##
  14 ##     info make --index-search=.SUFFIXES
  15 .SUFFIXES:
  16
  17 ### Flags affecting all rules
  18
  19 # A GNU make extension since gmake 3.72 (released in late 1994) to
  20 # remove the target of rules if commands in those rules fail. The
  21 # default is to only do that if make itself receives a signal. Affects
  22 # all targets, see:
  23 #
  24 #    info make --index-search=.DELETE_ON_ERROR
  25 .DELETE_ON_ERROR:
  26
  27 ### Global variables
  28
  29 ## comma, empty, space: handy variables as these tokens are either
  30 ## special or can be hard to spot among other Makefile syntax.
  31 comma := ,
  32 empty :=
  33 space := $(empty) $(empty)
  34
  35 ### Quieting
  36 ## common
  37 QUIET_SUBDIR0  = +$(MAKE) -C # space to separate -C and subdir
  38 QUIET_SUBDIR1  =
  39
  40 ifneq ($(findstring w,$(MAKEFLAGS)),w)
  41 PRINT_DIR = --no-print-directory
  42 else # "make -w"
  43 NO_SUBDIR = :
  44 endif
  45
  46 ifneq ($(findstring s,$(MAKEFLAGS)),s)
  47 ifndef V
  48 ## common
  49         QUIET_SUBDIR0  = +@subdir=
  50         QUIET_SUBDIR1  = ;$(NO_SUBDIR) echo '   ' SUBDIR $$subdir; \
  51                          $(MAKE) $(PRINT_DIR) -C $$subdir
  52
  53         QUIET          = @
  54         QUIET_GEN      = @echo '   ' GEN $@;
  55
  56         QUIET_MKDIR_P_PARENT  = @echo '   ' MKDIR -p $(@D);
  57
  58 ## Used in "Makefile"
  59         QUIET_CC       = @echo '   ' CC $@;
  60         QUIET_AR       = @echo '   ' AR $@;
  61         QUIET_LINK     = @echo '   ' LINK $@;
  62         QUIET_BUILT_IN = @echo '   ' BUILTIN $@;
  63         QUIET_LNCP     = @echo '   ' LN/CP $@;
  64         QUIET_XGETTEXT = @echo '   ' XGETTEXT $@;
  65         QUIET_MSGFMT   = @echo '   ' MSGFMT $@;
  66         QUIET_GCOV     = @echo '   ' GCOV $@;
  67         QUIET_SP       = @echo '   ' SP $<;
  68         QUIET_HDR      = @echo '   ' HDR $(<:hcc=h);
  69         QUIET_RC       = @echo '   ' RC $@;
  70         QUIET_SPATCH   = @echo '   ' SPATCH $<;
  71
  72 ## Used in "Documentation/Makefile"
  73         QUIET_ASCIIDOC  = @echo '   ' ASCIIDOC $@;
  74         QUIET_XMLTO     = @echo '   ' XMLTO $@;
  75         QUIET_DB2TEXI   = @echo '   ' DB2TEXI $@;
  76         QUIET_MAKEINFO  = @echo '   ' MAKEINFO $@;
  77         QUIET_DBLATEX   = @echo '   ' DBLATEX $@;
  78         QUIET_XSLTPROC  = @echo '   ' XSLTPROC $@;
  79         QUIET_GEN       = @echo '   ' GEN $@;
  80         QUIET_STDERR    = 2> /dev/null
  81
  82         QUIET_LINT_GITLINK      = @echo '   ' LINT GITLINK $<;
  83         QUIET_LINT_MANSEC       = @echo '   ' LINT MAN SEC $<;
  84         QUIET_LINT_MANEND       = @echo '   ' LINT MAN END $<;
  85
  86         export V
  87 endif
  88 endif
  89
  90 ### Templates
  91
  92 ## mkdir_p_parent: lazily "mkdir -p" the path needed for a $@
  93 ## file. Uses $(wildcard) to avoid the "mkdir -p" if it's not
  94 ## needed.
  95 ##
  96 ## Is racy, but in a good way; we might redundantly (and safely)
  97 ## "mkdir -p" when running in parallel, but won't need to exhaustively create
  98 ## individual rules for "a" -> "prefix" -> "dir" -> "file" if given a
  99 ## "a/prefix/dir/file". This can instead be inserted at the start of
 100 ## the "a/prefix/dir/file" rule.
 101 define mkdir_p_parent_template
 102 $(if $(wildcard $(@D)),,$(QUIET_MKDIR_P_PARENT)$(shell mkdir -p $(@D)))
 103 endef