mach/Machrules

   1 # Rules for MiG interfaces that want to go into the C library.
   2
   3 # Copyright (C) 1991, 92, 93, 94, 95, 96, 98 Free Software Foundation, Inc.
   4 # This file is part of the GNU C Library.
   5
   6 # The GNU C Library is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU Library General Public License
   8 # as published by the Free Software Foundation; either version 2 of
   9 # the License, or (at your option) any later version.
  10
  11 # The GNU C Library is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # Library General Public License for more details.
  15
  16 # You should have received a copy of the GNU Library General Public
  17 # License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18 # write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 # Boston, MA 02111-1307, USA.
  20
  21 # Makefiles may define these variable before including this file:
  22 #       user-interfaces         Names of interfaces to put user stubs in for.
  23 #       server-interfaces       Names of interfaces to put server stubs in for.
  24 #       interface-library       Name of interface library to build and install.
  25 # This file sets:
  26 #       interface-headers       Names of generated interface header files.
  27 #       interface-routines      Names of generated interface routines.
  28 # All user stubs are put in individual files, prefixed with RPC_; header
  29 # for both __ and non-__ names is put in foo.h.  Server interfaces are
  30 # written to foo_server.c and foo_server.h; the server functions are called
  31 # _S_rpcname.
  32
  33 # Includers can also add to or modify `migdefines' to set MiG flags.
  34
  35 all:
  36
  37 # Make sure no value comes from the environment, since we append to it.
  38 # This is done also in ../Rules, but we append to the value before
  39 # including Rules, which changes the origin.
  40 ifneq   "$(findstring env,$(origin generated))" ""
  41 generated :=
  42 endif
  43
  44
  45 include ../Makeconfig
  46
  47 MIGFLAGS = -DMACH_IPC_COMPAT=0 -DSTANDALONE -DTypeCheck=0 \
  48            $(+includes) $(migdefines) -subrprefix __
  49
  50 .SUFFIXES: .defs        # Just to set specified_rule_matched.
  51
  52 define nl       # This is needed by *.ir.
  53
  54
  55 endef
  56 ifdef user-interfaces
  57 *.ir := $(addprefix $(objpfx),$(foreach if,$(user-interfaces),$(if).ir))
  58 ifndef no_deps
  59 ifndef inhibit_interface_rules
  60 -include $(*.ir)
  61 endif
  62 endif
  63 ifneq "$(*.ir)" "$(wildcard $(*.ir))"
  64 # If any .ir file is missing, we will be unable to make all the deps.
  65 no_deps=t
  66 endif
  67 generated += $(*.ir:$(objpfx)%=%)
  68 endif
  69
  70
  71 # %.ir defines a variable `%-calls', which lists the RPCs defined by
  72 # %.defs, and a rule to build $(%-calls:%=RPC_$(%-userprefix)%.c) from
  73 # %.defs, where $(%-userprefix) is the user prefix given in %.defs.  We use
  74 # the kludgificacious method of defining a pattern rule to build files
  75 # matching patterns we are pretty damn sure will only match the particular
  76 # files we have in mind.  To be so damn sure, we use the silly names
  77 # RPC_*.c and the pattern R%C_*.c because using __*.c and _%*.c (or any
  78 # other useful pattern) causes the rule for `host_info' to also match
  79 # `xxx_host_info', and analogous lossage.
  80 #
  81 # Depend on %.h just so they will be built from %.uh in the
  82 # makefile-rebuilding run which builds %.ir; otherwise, %.uh is built as an
  83 # intermediate in order to make %.ir and then removed before re-exec, when
  84 # %.uh is built all over again to build %.h.
  85 $(objpfx)%.ir: $(objpfx)%.uh $(objpfx)%.h
  86         (awk "NF == 4 && (\$$2 == \"Routine\" || \$$2 == \"SimpleRoutine\")\
  87                 { printf \"$*-calls += %s\\n\", \$$3 }" $<      ;\
  88          echo '$$($*-calls:%=$$(objpfx)R\%C_%.c): $$(objpfx)$*.ustamp ;';\
  89         ) > $@-new
  90         mv $@-new $@
  91 vpath Machrules ../mach # Find ourselves.
  92
  93 ifndef transform-user-stub-output
  94 transform-user-stub-output = tmp
  95 define transform-user-stub
  96 echo "weak_alias (__$$call, $$call)" >> $(objpfx)tmp_$${call}.c;
  97 endef
  98 endif
  99
 100
 101 # Generate `#include <NAME.defs>', taking $* for NAME.
 102 # If $(NAME.defs) is defined use its value in place of `NAME.defs'.
 103 define include-%.defs
 104 echo '#include <$(firstword $($*.defs) $*.defs)>'
 105 endef
 106
 107 # Not an implicit rule so the stamps are never removed as intermediates!
 108 $(patsubst %,$(objpfx)%.ustamp,$(user-interfaces)): $(objpfx)%.ustamp:
 109         rm -f $@
 110         $(include-%.defs) | \
 111         $(MIG) - /dev/null -prefix __ \
 112                $(MIGFLAGS) $(user-MIGFLAGS) $(MIGFLAGS-$*) \
 113                -i $(objpfx)tmp_ \
 114                -server /dev/null -user /dev/null -header /dev/null
 115         for call in $($*-calls); do \
 116           $(transform-user-stub) \
 117           ../move-if-change $(objpfx)$(transform-user-stub-output)_$${call}.c \
 118                             $(objpfx)RPC_$${call}.c; \
 119         done
 120         touch $@
 121 -include $(patsubst %,$(objpfx)%.udeps,$(user-interfaces))
 122 $(patsubst %,$(objpfx)%.udeps,$(user-interfaces)):
 123   $(objpfx)%.udeps: $(..)mach/Machrules
 124         $(make-target-directory)
 125         $(include-%.defs) | \
 126         $(CC) $(CPPFLAGS) -M -x c - | \
 127         sed -e 's,- *:,$@ $(@:.udeps=.ustamp) $(@:.udeps=.uh) $(@:.udeps=.__h)\
 128                           $(@:.udeps=_server.c) $(@:.udeps=_server.h):,' \
 129             $(sed-remove-objpfx) > $@.new
 130         mv -f $@.new $@
 131
 132 # Look for the server stub files where they will be written.
 133 vpath %_server.c $(addprefix $(objpfx),$(sort $(dir $(server-interfaces))))
 134
 135 # Build the server stubs in $(objdir).
 136 $(objpfx)%_server.c $(objpfx)%_server.h:
 137         $(include-%.defs) | \
 138         $(MIG) - /dev/null -prefix _S_ \
 139                $(MIGFLAGS) $(server-MIGFLAGS) $(MIGFLAGS-$*) \
 140                -user /dev/null -header /dev/null \
 141                -server $(@:.h=.c) -sheader $(@:.c=.h)
 142
 143 # To get header files that declare both the straight and __ functions,
 144 # we generate two files and paste them together.
 145 $(objpfx)%.uh:; $(mig.uh)
 146 define mig.uh
 147 $(make-target-directory)
 148 $(include-%.defs) | \
 149 $(MIG) - /dev/null $(MIGFLAGS) $(MIGFLAGS-$*) \
 150        -header $@ -server /dev/null -user /dev/null
 151 endef
 152 $(objpfx)%.__h:; $(mig.__h)
 153 define mig.__h
 154 $(make-target-directory)
 155 $(include-%.defs) | \
 156 $(MIG) - /dev/null $(MIGFLAGS) $(MIGFLAGS-$*) -prefix __ \
 157        -header $@ -server /dev/null -user /dev/null
 158 endef
 159
 160 $(objpfx)%.h: $(objpfx)%.__h $(objpfx)%.uh
 161 # The last line of foo.__h is "#endif _foo_user_".
 162 # The first two lines of foo.uh are "#ifndef _foo_user_"/"#define _foo_user_".
 163         (sed -e '$$d' $<; sed -e '1,2d' $(word 2,$^)) > $@-new
 164         mv $@-new $@
 165
 166 interface-routines := $(foreach if,$(user-interfaces),                  \
 167                                 $(addprefix RPC_,$($(if)-calls)))       \
 168                       $(server-interfaces:%=%_server)
 169 interface-headers := $(user-interfaces:%=%.h) \
 170                      $(server-interfaces:%=%_server.h)
 171
 172 # Remove the generated user stub source and header files,
 173 # and don't distribute them.
 174 mach-generated = $(interface-routines:%=%.c) $(interface-headers) \
 175                  $(foreach h,$(user-interfaces),$h.uh $h.__h)
 176 generated += $(mach-generated)
 177
 178 # These are needed to generate the dependencies.
 179 before-compile += $(interface-headers:%=$(objpfx)%)
 180
 181 # Don't let these be intermediate files and get removed.
 182 $(foreach h,$(interface-headers:%.h=$(objpfx)%),$h.h $h.__h $h.uh) :
 183 $(interface-routines:%=$(objpfx)%.c) :
 184
 185 # Convenient target to generate all the headers.
 186 .PHONY: interface-headers
 187 interface-headers: $(interface-headers)
 188
 189 # Don't automatically generate dependencies for the sources we generate.
 190 # There are likely to be a whole lot of them, and we know their
 191 # dependencies ahead of time anyway because they're boilerplate.
 192 omit-deps += $(interface-routines)
 193
 194 # Choose any single module generated by MiG.  We will compute this module's
 195 # dependencies and then assume all other MiG-generated modules depend on the
 196 # same headers.
 197 some-if-rtn := $(firstword $(interface-routines))
 198 ifdef some-if-rtn
 199 $(foreach o,$(object-suffixes),$(interfaces-routines:%=%$o)): $(some-if-rtn).d
 200 generated += $(some-if-rtn).d
 201 endif
 202 \f
 203 # If defined, $(interface-library) is `libNAME'.  It is to be a library
 204 # containing all the MiG-generated functions for the specified interfaces.
 205
 206 ifdef interface-library
 207
 208 $(interface-library)-routines = $(interface-routines)
 209 extra-libs += $(interface-library)
 210
 211 # Avoid -lmachuser requiring -lc, which may not be built yet.  If the
 212 # shared object is absent, ld may choose a static library someplace and
 213 # produce a bogus libmachuser.so.
 214 +preinit =
 215 +postinit =
 216 interface.so = $(interface-library:lib%=%.so)
 217 LDFLAGS-$(interface.so) = -nostdlib -nostartfiles
 218
 219 endif