Rules

   1 # Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
   2 # This file is part of the GNU C Library.
   3
   4 # The GNU C Library is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU Library General Public License as
   6 # published by the Free Software Foundation; either version 2 of the
   7 # License, or (at your option) any later version.
   8
   9 # The GNU C Library is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # Library General Public License for more details.
  13
  14 # You should have received a copy of the GNU Library General Public
  15 # License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16 # write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 # Boston, MA 02111-1307, USA.
  18
  19 #
  20 #       Rules for making a subdirectory in the GNU C library.
  21 #       Each subdirectory Makefile defines some variables and includes this.
  22 #
  23 ifneq (,)
  24 This makefile requires GNU Make.
  25 endif
  26
  27 all: # Don't let the default goal come from Makeconfig.
  28
  29 include ../Makeconfig
  30
  31 ifndef  subdir
  32 Each subdirectory makefile must define the `subdir' variable.
  33 endif
  34 # This is benign and useless in GNU make before 3.63.
  35 export subdir := $(subdir)
  36 \f
  37 # This is the default target; it makes the library and auxiliary programs.
  38 .PHONY: all
  39 all: objs lib others
  40
  41 ifeq ($(build-programs),yes)
  42 others: $(addprefix $(objpfx),$(extra-objs) \
  43                               $(install-lib) $(install-bin) \
  44                               $(install-rootsbin) $(install-sbin))
  45 else
  46 others: $(addprefix $(objpfx),$(extra-objs) \
  47                               $(install-lib))
  48 endif
  49
  50 ifneq   "$(findstring env,$(origin headers))" ""
  51 headers :=
  52 endif
  53
  54 ifneq   "$(findstring env,$(origin generated))" ""
  55 generated :=
  56 endif
  57
  58 ifneq   "$(findstring env,$(origin common-generated))" ""
  59 common-generated :=
  60 endif
  61
  62 include ../Makerules
  63
  64 .PHONY: subdir_lib
  65 subdir_lib: lib-noranlib
  66
  67 # Some subdirs need to install a dummy library.
  68 # They can use "$(objpfx)libfnord.a: $(dep-dummy-lib); $(make-dummy-lib)".
  69 dep-dummy-lib = $(common-objpfx)dummy.o
  70 define make-dummy-lib
  71 $(AR) cr$(verbose) $@ $<
  72 endef
  73 $(common-objpfx)dummy.c:
  74         rm -f $@
  75         echo 'void __dummy__ (void) { }' > $@
  76 $(common-objpfx)empty.c:
  77         cp -f /dev/null $@
  78 common-generated += dummy.o dummy.c empty.c \
  79                     $(addprefix empty,$(object-suffixes))
  80 \f
  81 # This makes all the auxiliary and test programs.
  82
  83 .PHONY: others tests
  84 ifeq ($(build-programs),yes)
  85 others: $(addprefix $(objpfx),$(others) $(extra-objs))
  86 else
  87 others: $(addprefix $(objpfx),$(extra-objs))
  88 endif
  89 ifeq ($(cross-compiling),yes)
  90 tests: $(addprefix $(objpfx),$(tests) $(test-srcs))
  91 else
  92 tests: $(tests:%=$(objpfx)%.out)
  93 endif
  94
  95 ifeq ($(build-programs),yes)
  96 ifneq "$(strip $(others) $(tests) $(test-srcs))" ""
  97 $(addprefix $(objpfx),$(others) $(tests) $(test-srcs)): %: %.o \
  98   $(sort $(filter $(common-objpfx)libc%,$(link-libc))) \
  99   $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
 100         $(+link)
 101 endif
 102 else
 103 ifneq "$(strip $(tests) $(test-srcs))" ""
 104 $(addprefix $(objpfx),$(tests) $(test-srcs)): %: %.o \
 105   $(sort $(filter $(common-objpfx)libc%,$(link-libc))) \
 106   $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
 107         $(+link)
 108 endif
 109 endif
 110
 111 ifneq "$(strip $(tests) $(test-srcs))" ""
 112 # These are the implicit rules for making test outputs
 113 # from the test programs and whatever input files are present.
 114 $(objpfx)%.out: %.args $(objpfx)% %.input
 115         $($*-ENV) $(built-program-cmd) `cat $(word 1,$^)` < $(word 3,$^) > $@
 116 $(objpfx)%.out: %.args $(objpfx)%
 117         $($*-ENV) $(built-program-cmd) `cat $(word 1,$^)` > $@
 118 $(objpfx)%.out: %.input $(objpfx)%
 119         $($*-ENV) $(built-program-cmd) < $(word 1,$^) > $@
 120 $(objpfx)%.out: /dev/null $(objpfx)%    # Make it 2nd arg for canned sequence.
 121         $($*-ENV) $(built-program-cmd) > $@
 122 endif   # tests
 123 \f
 124 .PHONY: distclean realclean subdir_distclean subdir_realclean \
 125         subdir_clean subdir_mostlyclean
 126 subdir_mostlyclean: mostlyclean
 127 subdir_clean: clean
 128 subdir_distclean: distclean
 129 subdir_realclean: realclean
 130 realclean: distclean
 131 distclean: clean
 132
 133 .PHONY: subdir_echo-headers
 134 subdir_echo-headers: echo-headers
 135
 136 .PHONY: subdir_echo-distinfo
 137 subdir_echo-distinfo:
 138         @echo $(addprefix +header+,$(headers) $(filter %.h,$(distribute))) \
 139               $(addprefix +nodist+,$(generated) $(common-generated) $(dont_distribute))
 140
 141 # We want to install everything except the library itself, but update all
 142 # our portions of the library because the parent make will install it later
 143 # (likewise the stubs file).
 144 .PHONY: subdir_install
 145 subdir_install: install-no-libc.a lib-noranlib stubs
 146
 147 .PHONY: subdir_TAGS subdir_dist
 148 subdir_TAGS: TAGS
 149 subdir_dist: dist
 150
 151 # Convenient target to update all the generated source files.
 152 .PHONY: generated
 153 generated: $(addprefix $(common-objpfx),$(common-generated)) \
 154         $(addprefix $(objpfx),$(generated))
 155
 156 define o-iterator-doit
 157 $(common-objpfx)empty$o: $(common-objpfx)empty.c $(before-compile);
 158         $$(compile-command.c)
 159 endef
 160 object-suffixes-left := $(object-suffixes)
 161 include $(o-iterator)
 162
 163 ifndef libc.so-version
 164 # Undefine this because it can't work when we libc.so is unversioned.
 165 static-only-routines =
 166 endif
 167
 168 ifdef static-only-routines
 169 # These routines are to be omitted from the shared library object,
 170 # so we replace the PIC objects for them with the empty object file.
 171 $(static-only-routines:%=$(objpfx)%.os): %.os: $(common-objpfx)empty.os
 172         rm -f $@
 173         ln $< $@
 174 endif
 175
 176 ifdef shared-only-routines
 177 # If we have versioned code we don't need the old versions in any of the
 178 # static libraries.
 179 define o-iterator-doit
 180 $(shared-only-routines:%=$(objpfx)%$o): %$o: $(common-objpfx)empty$o;
 181         rm -f $$@
 182         ln $$< $$@
 183 endef
 184 object-suffixes-left := $(filter-out .os,$(object-suffixes))
 185 include $(o-iterator)
 186 endif