sysdeps/unix/Makefile

   1 # Copyright (C) 1991,1992,1993,1994,1995,1996,1997,1998,1999,2003, 2006, 2008
   2 #       Free Software Foundation, Inc.
   3 # This file is part of the GNU C Library.
   4
   5 # The GNU C Library is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU Lesser General Public
   7 # License as published by the Free Software Foundation; either
   8 # version 2.1 of the License, or (at your option) any later version.
   9
  10 # The GNU C Library is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # Lesser General Public License for more details.
  14
  15 # You should have received a copy of the GNU Lesser General Public
  16 # License along with the GNU C Library; if not, write to the Free
  17 # Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18 # 02111-1307 USA.
  19
  20 # The unix-specific configure fragment writes `unix-generated' in config.make.
  21 config-generated := $(config-generated) $(unix-generated)
  22 \f
  23 ifeq (,$(filter-out $(sysdep_dir)/generic/ $(common-objpfx),\
  24         $(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/bits/local_lim.h))))))
  25
  26 ifneq (,$(wildcard $(sysincludedir)/sys/param.h))
  27 mk-local_lim-CFLAGS += -DHAVE_SYS_PARAM_H
  28 endif
  29 ifneq (,$(wildcard $(sysincludedir)/sys/limits.h))
  30 mk-local_lim-CFLAGS += -DHAVE_SYS_LIMITS_H
  31 endif
  32 ifneq (,$(wildcard $(sysincludedir)/limits.h))
  33 mk-local_lim-CFLAGS += -DHAVE_LIMITS_H
  34 endif
  35
  36 $(common-objpfx)bits/local_lim.h: $(common-objpfx)mk-local_lim
  37         $(dir $<)$(notdir $<) > $@-t
  38         mv -f $@-t $@
  39 $(common-objpfx)mk-local_lim: $(sysdep_dir)/unix/mk-local_lim.c
  40         $(common-objdir-compile)
  41
  42 before-compile += $(common-objpfx)bits/local_lim.h
  43 common-generated += bits/local_lim.h mk-local_lim
  44
  45 endif
  46 \f
  47 ifeq (,$(filter-out $(sysdep_dir)/generic/ $(common-objpfx),\
  48         $(patsubst %/sys/param.h,%/,\
  49                    $(firstword $(wildcard $(+sysdep_dirs:%=%/sys/param.h))))))
  50
  51 before-compile := $(before-compile) $(common-objpfx)sys/param.h
  52
  53 $(common-objpfx)sys/param.h: $(sysincludedir)/sys/param.h
  54         $(make-target-directory)
  55         (echo '#ifndef _SYS_PARAM_H';   \
  56          echo '#define _SYS_PARAM_H 1'; \
  57          echo '#include <endian.h>';            \
  58          $(AWK) < $<                    \
  59            '/^#define[  ]*NULL/ { print "#ifndef NULL"; \
  60                                   print $$0;            \
  61                                   print "#endif";       \
  62                                   was_null = 1 }        \
  63             { if (!was_null) print $$0;                 \
  64               was_null = 0 }';          \
  65          echo '#ifndef MAXHOSTNAMELEN'; \
  66          echo '#define MAXHOSTNAMELEN 64 /* XXX */'; \
  67          echo '#endif /* No MAXHOSTNAMELEN.  */'; \
  68          echo '#endif   /* sys/param.h */') > $@-tmp
  69         mv $@-tmp $@
  70
  71 $(common-objpfx)param.h.c: $(sysincludedir)/sys/param.h
  72         rm -f $@
  73         cp $< $@
  74 $(common-objpfx)param.h.dep: $(common-objpfx)param.h.c \
  75                              $(sysdep_dir)/unix/Makefile
  76         $(+mkdep) -I$(sysincludedir) $<                 \
  77         | sed > $@-t                                    \
  78               -e 's@$(sysincludedir)/sys/param.h@@'     \
  79               -e 's@^.*:@@'                             \
  80               -e 's@$<@@g'                              \
  81               -e 's@$(sysincludedir)/*@@g'              \
  82               -e 's@\\$$@@'                             \
  83               -e 's@^@sys/param.h-includes := $$(sys/param.h-includes) @'
  84         mv $@-t $@
  85
  86 # Get the generated definition of sys/param.h-includes.
  87 ifndef no_deps
  88 -include $(common-objpfx)param.h.dep
  89 endif
  90
  91 # Don't preempt our own headers.
  92 sys/param.h-includes := \
  93   $(filter-out $(patsubst $(..)%,%,\
  94                           $(wildcard $(addprefix $(..),\
  95                                      $(sys/param.h-includes)))),\
  96                $(sys/param.h-includes))
  97
  98
  99 .PHONY: sys/param.h-includes
 100 sys/param.h-includes: $(addprefix $(common-objpfx),$(sys/param.h-includes))
 101
 102 ifdef sys/param.h-includes
 103 # Copy the system files to $(common-objdir).
 104 $(addprefix $(common-objpfx),$(sys/param.h-includes)): $(common-objpfx)%: \
 105                                                        $(sysincludedir)/%
 106         $(make-target-directory)
 107 # Some of these files sometimes contain conflicting declarations for htons,
 108 # ntohs, etc.  They also often contain definitions of *_ENDIAN and
 109 # BYTE_ORDER, which we define ourselves in <endian.h>.
 110         sed -e '/[      ]*[hn]to[nh][sl][        (]*/d' \
 111             -e '/^#define[      ]*[A-Z]*_ENDIAN/d' \
 112             -e '/^#define[      ]*BYTE_ORDER/d' \
 113             $< > $@-t
 114         mv $@-t $@
 115 endif
 116
 117 common-generated := $(common-generated) \
 118                     sys/param.h $(sys/param.h-includes) param.h.c param.h.dep
 119
 120
 121 ifeq ($(subdir),misc)
 122
 123 # Install system headers the system sys/param.h uses.
 124
 125 sysdep_headers := $(sysdep_headers) $(sys/param.h-includes)
 126
 127 endif # misc
 128
 129 endif # No sysdep sys/param.h.
 130 \f
 131 ifeq (,$(filter-out $(sysdep_dir)/generic/ $(common-objpfx),\
 132         $(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/bits/errno.h))))))
 133
 134 # These need to exist before any compiling is done,
 135 # so cpp doesn't instead find the generic versions.
 136 before-compile := $(before-compile) $(common-objpfx)bits/errno.h
 137
 138 $(common-objpfx)bits/errno.h: $(common-objpfx)make-errnos
 139         $(dir $<)$(notdir $<) > $@-tmp
 140         mv $@-tmp $@
 141
 142 $(common-objpfx)make-errnos: $(common-objpfx)make-errnos.c
 143         $(common-objdir-compile)
 144
 145 $(common-objpfx)make-errnos.c: $(sysdep_dir)/unix/errnos-tmpl.c \
 146                         $(sysdep_dir)/unix/errnos.awk $(common-objpfx)errnos
 147         $(AWK) -f $(word 2,$^) errnos="`tr '\012' ' ' < $(word 3,$^)`" $< > $@T
 148         mv $@T $@
 149
 150 $(common-objpfx)errnos: $(wildcard $(sysincludedir)/errno.h     \
 151                                    $(sysincludedir)/sys/errno.h)
 152         sed -n 's/^#define[     ]*\(E[A-Z0-9][A-Z0-9]*\)[       ].*$$/\1/p' \
 153             $^ > $@-tmp
 154         mv $@-tmp $@
 155
 156 common-generated := $(common-generated) \
 157                     errnos.h errnos make-errnos make-errnos.c
 158 endif
 159 \f
 160 ifeq (,$(filter-out $(sysdep_dir)/generic/ $(common-objpfx),\
 161         $(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/bits/ioctls.h))))))
 162
 163 before-compile := $(before-compile) $(common-objpfx)bits/ioctls.h
 164
 165 $(common-objpfx)bits/ioctls.h: $(common-objpfx)make-ioctls
 166         $(dir $<)$(notdir $<) > $@-tmp
 167         mv $@-tmp $@
 168
 169 ioctl-includes := sys/termios.h net/nit.h
 170 ioctl-includes := $(wildcard $(addprefix $(sysincludedir)/,$(ioctl-includes)))
 171 make-ioctls-CFLAGS := $(subst /,_,$(subst .,_,\
 172                         $(patsubst $(sysincludedir)/%,-DHAVE_%,\
 173                                    $(ioctl-includes))))
 174
 175 $(common-objpfx)make-ioctls: $(common-objpfx)make-ioctls.c
 176         $(common-objdir-compile)
 177
 178 $(common-objpfx)make-ioctls.c: $(sysdep_dir)/unix/ioctls-tmpl.c \
 179                                $(sysdep_dir)/unix/ioctls.awk \
 180                                $(common-objpfx)ioctls
 181         $(AWK) -f $(word 2,$^) requests="`cat $(word 3,$^)`" $< > $@T
 182         mv $@T $@
 183
 184
 185 bits_termios.h := $(firstword $(wildcard $(+sysdep_dirs:%=%/bits/termios.h)))
 186 ifeq ($(bits_termios.h),$(sysdep_dir)/generic/bits/termios.h)
 187 bits_termios.h := # Ignore the generic version.
 188 endif
 189
 190 # If there is a system-specific <bits/termios.h> file, we want to omit
 191 # all the symbols it defines from ioctls.  Otherwise, both
 192 # <bits/ioctls.h> and <bits/termios.h> would define them.  The
 193 # system-specific <bits/termios.h> file presumably defines them with
 194 # the same values as we find from the system's headers.  We also want
 195 # to omit from ioctls the symbols defined in our own
 196 # <sys/ttydefaults.h>, to avoid multiple definition conflicts.  We use
 197 # snarf-ioctls on these files to find what symbols we want to omit.
 198 # fgrep -xv gives all lines which do not match in their entirety;
 199 # without -x, CSTOP's presence elided TIOCSTOP.
 200
 201 $(common-objpfx)ioctls: $(sysdep_dir)/unix/snarf-ioctls \
 202                         $(sysincludedir)/sys/ioctl.h $(ioctl-includes)
 203         $(dir $<)$(notdir $<) $(filter-out $<,$^) \
 204         | fgrep -xv "`($(dir $<)$(notdir $<) $(bits_termios.h) \
 205                                              $(..)sysdeps/generic/sys/ttydefaults.h; \
 206                       echo NULL) \
 207                      | sort | uniq`" \
 208         | sort | uniq | tr '\012' ' ' > $@-tmp
 209         mv $@-tmp $@
 210
 211 common-generated := $(common-generated) \
 212                     bits/ioctls.h ioctls make-ioctls make-ioctls.c
 213 endif
 214 \f
 215 ifeq (,$(filter-out $(sysdep_dir)/generic/ $(common-objpfx),\
 216         $(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/sys/syscall.h))))))
 217
 218 # The syscall code assumes a file <sys/syscall.h> that defines macros
 219 # `SYS_call' for syscall `call'.  Variations on this I have seen include:
 220 # it's in <sys/syscall.h>;
 221 # it's in <sys.s>;
 222 # it defines `CALL' instead of `SYS_call'.
 223 # Irix has a <syscall.h> which is not what we want, so check for <sys.s> first.
 224
 225 # Find a file that might have these.  NOTE: This list of possibilities is
 226 # repeated in sysdeps/unix/configure and the two should be kept in sync.
 227 syscall.h := $(firstword $(wildcard $(addprefix $(sysincludedir)/, \
 228                                                 sys.s sys/sys.s \
 229                                                 sys.S sys/sys.S \
 230                                                 syscall.h sys/syscall.h \
 231                                                 )))
 232 ifdef syscall.h
 233
 234 # Transmogrify any of several formats of the file into the one we want.
 235 $(common-objpfx)sys/syscall.h: $(syscall.h)
 236         $(make-target-directory)
 237         tr '[A-Z]' '[a-z]' < $< | \
 238         sed -e 's/[     ]sys_/ /' \
 239             -e 's/^#define[     ]*\([a-z0-9_]*\)[       ]*/#define SYS_\1 /' \
 240             -e 's/[     ]sys_/ SYS_/' \
 241             -e 's/SYS_syscall_basenum/syscall_basenum/g' \
 242             -e 's/SYS_kerncall_basenum/kerncall_basenum/g' \
 243             -e 's/SYS_sysvoffset/sysvoffset/g' \
 244             -e '/^#/!d' \
 245             -e '/^#ident/d' \
 246             -e 's-\(/\*[^*]*\)$$-\1\*/-' \
 247         > $@-tmp
 248         mv $@-tmp $@
 249
 250 before-compile += $(common-objpfx)sys/syscall.h
 251 common-generated += sys/syscall.h
 252
 253 endif
 254
 255 endif
 256 \f
 257 ifndef inhibit-unix-syscalls
 258
 259 # Sysdep dirs unix/... can contain a file syscalls.list,
 260 # which specifies objects to be compiled as simple Unix system calls.
 261
 262 -include $(common-objpfx)sysd-syscalls
 263 omit-deps += $(foreach t,$(sysd-rules-targets),$(unix-syscalls:%=$t))
 264
 265 ifeq (misc,$(subdir))
 266 sysdep_routines += $(unix-extra-syscalls)
 267
 268 ifdef unix-stub-syscalls
 269 # The system call entry points in this list are supposed to be additional
 270 # functions not overriding any other sysdeps/.../call.c implementation, but
 271 # their system call numbers are unavailable in the kernel headers we're
 272 # using.  Instead of a system call stub, these get a function that fails
 273 # with ENOSYS.  We just generate a single module defining one function and
 274 # making all these entry point names aliases for it.
 275 sysdep_routines += stub-syscalls
 276 $(objpfx)stub-syscalls.c: $(common-objpfx)sysd-syscalls \
 277                           $(..)sysdeps/unix/Makefile
 278         $(make-target-directory)
 279         (for call in $(unix-stub-syscalls); do \
 280            echo "#define $$call RENAMED_$$call"; \
 281          done; \
 282          echo '#include <errno.h>'; \
 283          for call in $(unix-stub-syscalls); do \
 284            echo "#undef $$call"; \
 285          done; \
 286          echo 'long int _no_syscall (void)'; \
 287          echo '{ __set_errno (ENOSYS); return -1L; }'; \
 288          for call in $(unix-stub-syscalls); do \
 289            case $$call in \
 290            *@@*) ver=$${call##*@}; call=$${call%%*@}; \
 291                  echo "strong_alias (_no_syscall, $${call}_$${ver})"; \
 292                  echo "default_symbol_version \
 293                          ($${call}_$${ver}, $$call, $$ver);" ;; \
 294            *@@*) ver=$${call##*@}; call=$${call%%*@}; \
 295                  echo "strong_alias (_no_syscall, $${call}_$${ver})"; \
 296                  echo "symbol_version ($${call}_$${ver}, $$call, $$ver);" ;; \
 297            *) echo "weak_alias (_no_syscall, $$call)"; \
 298               echo "stub_warning ($$call)"; \
 299               echo "weak_alias (_no_syscall, __GI_$$call)" ;; \
 300            esac; \
 301          echo '#include <stub-tag.h>'; \
 302          done) > $@T
 303         mv -f $@T $@
 304 generated += stub-syscalls.c
 305 endif
 306 endif
 307
 308 # This is the end of the pipeline for compiling the syscall stubs.
 309 # The stdin in assembler with cpp using sysdep.h macros.
 310 # Be sure to disable debugging info since it would all just say "<stdin>".
 311 compile-syscall = $(filter-out -g%,$(COMPILE.S)) -x assembler-with-cpp -o $@ -
 312
 313 ifndef avoid-generated
 314 $(common-objpfx)sysd-syscalls: $(..)sysdeps/unix/make-syscalls.sh \
 315                                $(wildcard $(+sysdep_dirs:%=%/syscalls.list))
 316         for dir in $(+sysdep_dirs); do \
 317           test -f $$dir/syscalls.list && \
 318           { sysdirs='$(sysdirs)' \
 319             asm_CPP='$(COMPILE.S) -E -x assembler-with-cpp' \
 320             $(SHELL) $(dir $<)$(notdir $<) $$dir || exit 1; }; \
 321           test $$dir = $(..)sysdeps/unix && break; \
 322         done > $@T
 323         mv -f $@T $@
 324 endif
 325
 326 # The syscall objects depend on s-proto.d or s-proto-cancel.d, which
 327 # are generated to specify dependencies generated syscalls have on
 328 # headers.
 329 # These deps use file names relative to a subdir, so don't
 330 # include them in the parent directory.
 331 ifneq (,$(filter $(unix-syscalls),$(routines) $(sysdep_routines) $(aux)))
 332 ifndef no_deps
 333 -include $(common-objpfx)s-proto.d
 334 -include $(common-objpfx)s-proto-bp.d
 335 -include $(common-objpfx)s-proto-cancel.d
 336 endif
 337 endif
 338
 339 $(common-objpfx)s-%.d: $(..)sysdeps/unix/s-%.S \
 340                        $(wildcard $(+sysdep_dirs:%=%/syscalls.list))
 341         $(+make-deps)
 342
 343 common-generated += s-proto.d s-proto-bp.d s-proto-cancel.d
 344 postclean-generated += sysd-syscalls
 345
 346 endif