Makefile

   1 # Copyright (C) 1991, 1992, 1993, 1994 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
  16 # not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 # Cambridge, MA 02139, USA.
  18
  19 #
  20 #       Master Makefile for the GNU C library
  21 #
  22 ifneq (,)
  23 This makefile requires GNU Make.
  24 endif
  25
  26
  27 # This is the default target; it makes everything except the tests.
  28 .PHONY: all
  29 all: lib others
  30 \f
  31 configure: configure.in
  32         autoconf $(ACFLAGS)
  33
  34 %/configure: %/configure.in
  35         autoconf $(ACFLAGS) $< > $@.new
  36         mv -f $@.new $@
  37
  38 include Makeconfig
  39
  40 include $(objpfx)sysd-dirs
  41 define \n
  42
  43
  44 endef
  45 sysdep-subdirs := $(subst $(\n), ,$(sysdep-subdirs))
  46
  47 # These are the subdirectories containing the library source.
  48 +ansi_dirs      := assert ctype locale math setjmp \
  49                    signal stdio stdlib malloc string time
  50 +posix_dirs     := dirent grp pwd posix io termios
  51 +other_dirs     := resource socket misc gnulib $(wildcard crypt) manual
  52 subdirs         := $(strip $(+ansi_dirs) $(+posix_dirs) $(+other_dirs) \
  53                            $(sysdep-subdirs))
  54 export subdirs := $(subdirs)    # Benign, useless in GNU make before 3.63.
  55
  56 # The mach and hurd subdirectories have many generated header files which
  57 # the much of rest of the library depends on, so it is best to build them
  58 # first (and mach before hurd, at that).  The before-compile additions in
  59 # sysdeps/{mach,hurd}/Makefile should make it reliably work for these files
  60 # not to exist when making in other directories, but it will be slower that
  61 # way with more somewhat expensive `make' invocations.
  62 subdirs := $(filter mach,$(subdirs)) $(filter hurd,$(subdirs)) \
  63            $(filter-out mach hurd,$(subdirs))
  64
  65 # All initialization source files.
  66 +subdir_inits   := $(wildcard $(foreach dir,$(subdirs),$(dir)/init-$(dir).c))
  67 # All subdirectories containing initialization source files.
  68 +init_subdirs   := $(patsubst %/,%,$(dir $(+subdir_inits)))
  69
  70
  71 # These are the targets that are made by making them in each subdirectory.
  72 +subdir_targets := subdir_lib objects objs others subdir_mostlyclean    \
  73                    subdir_clean subdir_distclean subdir_realclean       \
  74                    tests subdir_lint.out                                \
  75                    subdir_echo-headers subdir_echo-distinfo             \
  76                    subdir_install $(addprefix install-,                 \
  77                                               no-libc.a bin lib         \
  78                                               data headers others)
  79 \f
  80 headers := features.h errno.h sys/errno.h errnos.h limits.h $(stddef.h)
  81
  82 echo-headers: subdir_echo-headers
  83 \f
  84 ifdef +gnu-stabs
  85 # We're using the GNU linker, so we use the set-element init function.
  86 +init := set-init
  87 else
  88 # We're not using the GNU linker, so we use the munch init function.
  89 +init := munch-init
  90
  91 $(objpfx)munch-init.c: munch.awk munch-tmpl.c $(+subdir_inits)
  92         awk -f $< subdirs='$(+init_subdirs)' $(word 2,$^) > $@-t
  93         mv -f $@-t $@
  94 generated := $(generated) munch-init.c
  95 endif
  96
  97 aux     := sysdep $(+init) version start
  98
  99
 100 # What to install.
 101 # SCO 3.2v4 uses crt1.o.  Some other system uses Mcrt1.o.
 102 # They are created below (containing no data or code).
 103 install-lib = crt0.o crt1.o Mcrt1.o     # libc.a is done by Makerules.
 104 install-others = $(includedir)/stubs.h
 105
 106
 107 include Makerules
 108
 109 # Install from subdirectories too.
 110 install: subdir_install
 111
 112 # `crt0' is the traditional name for the startup code,
 113 # so that's what we install start.o as.
 114 $(objpfx)crt0.o: $(objpfx)start.o
 115         -rm -f $@
 116         ln $< $@
 117
 118 $(objpfx)Mcrt1.o $(objpfx)crt1.o:
 119         cp /dev/null $(@:.o=.c)
 120         $(COMPILE.c) $(@:.o=.c) $(OUTPUT_OPTION)
 121         rm -f $(@:.o=.c)
 122
 123 lib-noranlib $(libc.a)(__.SYMDEF): subdir_lib
 124
 125
 126 $(objpfx)sysd-dirs: $(+sysdir_pfx)config.make
 127         (echo define sysdep-subdirs;                                          \
 128          for dir in $(sysdirs); do                                            \
 129            if [ -r $(sysdep_dir)/$$dir/Subdirs ]; then                        \
 130              sed 's/#.*$$//' $(sysdep_dir)/$$dir/Subdirs;                     \
 131            else true;                                                         \
 132            fi;                                                                \
 133          done;                                                                \
 134          echo endef) > $@-tmp
 135          mv -f $@-tmp $@
 136 \f
 137 # Makerules creates a file `stub-$(subdir)' for each subdirectory, which
 138 # contains `#define __stub_FUNCTION' for each function which is a stub.
 139 # Here we paste all of these together into <stubs.h>.
 140
 141 subdir-stubs := $(foreach dir,$(subdirs),$(common-objpfx)stub-$(dir))
 142
 143 # Since stubs.h is never needed when building the library, we simplify the
 144 # hairy installation process by producing it in place only as the last part
 145 # of the top-level `make install'.  It depends on subdir_install, which
 146 # iterates over all the subdirs; subdir_install in each subdir depends on
 147 # the subdir's stubs file.  Having more direct dependencies would result in
 148 # extra iterations over the list for subdirs and many recursive makes.
 149 $(includedir)/stubs.h: subdir_install
 150         @rm -f $(objpfx)stubs.h
 151         (echo '/* This file is automatically generated.';\
 152          echo '   It defines a symbol `__stub_FUNCTION'\'' for each function';\
 153          echo '   in the C library which is a stub, meaning it will fail';\
 154          echo '   every time called, usually setting errno to ENOSYS.  */';\
 155          sort $(subdir-stubs)) > $(objpfx)stubs.h
 156         $(INSTALL_DATA) $(objpfx)stubs.h $@
 157         rm -f $(objpfx)stubs.h
 158 \f
 159 # This makes the Info or DVI file of the documentation from the Texinfo source.
 160 .PHONY: info dvi
 161 info dvi:
 162         $(MAKE) -C manual $@
 163 \f
 164 # This makes all the subdirectory targets.
 165
 166 # For each target, make it depend on DIR/target for each subdirectory DIR.
 167 $(+subdir_targets): %: $(addsuffix /%,$(subdirs))
 168
 169 # Compute a list of all those targets.
 170 all-subdirs-targets := $(foreach dir,$(subdirs),\
 171                                  $(addprefix $(dir)/,$(+subdir_targets)))
 172
 173 # The action for each of those is to cd into the directory and make the
 174 # target there.
 175 $(all-subdirs-targets):
 176         $(MAKE) -C $(@D) $(@F)
 177
 178 .PHONY: $(+subdir_targets) $(all-subdirs-targets)
 179 \f
 180 # Targets to clean things up to various degrees.
 181
 182 .PHONY: clean realclean distclean distclean-1 parent-clean parent-mostlyclean
 183
 184 # Subroutines of all cleaning targets.
 185 parent-mostlyclean: common-mostlyclean # common-mostlyclean is in Makerules.
 186         -rm -f $(libc.a) $(addprefix $(objpfx),$(install-lib))
 187 parent-clean: parent-mostlyclean common-clean
 188         -rm -f $(addprefix $(common-objpfx),$(common-generated))
 189         -rm -f $(addprefix $(+sysdir_pfx),sysd-Makefile sysd-dirs sysdirs)
 190
 191 clean: parent-clean
 192 # This is done this way rather than having `subdir_clean' be a
 193 # dependency of this target so that libc.a will be removed before the
 194 # subdirectories are dealt with and so they won't try to remove object
 195 # files from it when it's going to be removed anyway.
 196         @$(MAKE) subdir_clean no_deps=t
 197 mostlyclean: parent-mostlyclean
 198         @$(MAKE) subdir_mostlyclean no_deps=t
 199
 200 # The realclean target is just like distclean for the parent, but we want
 201 # the subdirs to know the difference in case they care.
 202 realclean distclean: parent-clean
 203 # This is done this way rather than having `subdir_distclean' be a
 204 # dependency of this target so that libc.a will be removed before the
 205 # subdirectories are dealt with and so they won't try to remove object
 206 # files from it when it's going to be removed anyway.
 207         @$(MAKE) distclean-1 no_deps=t distclean-1=$@
 208
 209 # Subroutine of distclean and realclean.
 210 distclean-1: subdir_$(distclean-1)
 211         -rm -f $(config-generated)
 212         -rm -f $(addprefix $(objpfx),config.status config.make)
 213 ifdef objdir
 214         -rm -f $(objpfx)Makefile
 215 endif
 216 \f
 217 .PHONY: echo_subdirs
 218 echo_subdirs:;@echo '$(subdirs)'
 219
 220 .PHONY: echo-distinfo parent_echo-distinfo
 221 echo-distinfo: parent_echo-distinfo subdir_echo-distinfo
 222 parent_echo-distinfo:
 223         @echo $(addprefix +header+,$(headers)) \
 224               $(addprefix +nodist+,$(generated))
 225 \f
 226 # Make the distribution tarfile.
 227
 228 distribute  := README INSTALL NOTES COPYING.LIB COPYING ChangeLog NEWS  \
 229                Makefile Makeconfig Makerules Rules Make-dist MakeTAGS   \
 230                ansidecl.h mkinstalldirs move-if-change install.sh       \
 231                configure configure.in aclocal.m4 config.sub config.guess\
 232                munch-tmpl.c munch.awk gnu-stabs.h sysdep.h set-hooks.h
 233
 234 distribute := $(strip $(distribute))
 235 generated := $(generated) stubs.h
 236
 237 README: README.template version.c ; # Make-dist should update README.
 238
 239 INSTALL: manual/maint.texi
 240         makeinfo --no-validate --no-warn --no-headers $< -o $@