1 # Rules for MiG interfaces that want to go into the C library.
2 # Copyright (C) 1991-2014 Free Software Foundation, Inc.
3 # This file is part of the GNU C Library.
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.
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.
15 # You should have received a copy of the GNU Lesser General Public
16 # License along with the GNU C Library; if not, see
17 # <http://www.gnu.org/licenses/>.
19 # Makefiles may define these variable before including this file:
20 # user-interfaces Names of interfaces to put user stubs in for.
21 # server-interfaces Names of interfaces to put server stubs in for.
22 # interface-library Name of interface library to build and install.
24 # interface-headers Names of generated interface header files.
25 # interface-routines Names of generated interface routines.
26 # All user stubs are put in individual files, prefixed with RPC_; header
27 # for both __ and non-__ names is put in foo.h. Server interfaces are
28 # written to foo_server.c and foo_server.h; the server functions are called
31 # Includers can also add to or modify `migdefines' to set MiG flags.
35 # Make sure no value comes from the environment, since we append to it.
36 # This is done also in ../Rules, but we append to the value before
37 # including Rules, which changes the origin.
38 ifneq "$(findstring env,$(origin generated))" ""
45 # This makefile contains a lot of implicit rules that get optimized
46 # away if the target directory does not exist.
48 -include $(objpfx)dummy.mk
51 $(make-target-directory)
54 MIGFLAGS = -DMACH_IPC_COMPAT=0 -DSTANDALONE -DTypeCheck=0 \
55 $(+includes) $(migdefines) -subrprefix __
56 # Putting CC in the enivronment makes the mig wrapper script
57 # use the same compiler setup we are using to run cpp.
58 MIG := CC='${CC}' CPP='${CPP} -x c' $(MIG)
60 .SUFFIXES: .defs # Just to set specified_rule_matched.
62 define nl # This is needed by *.ir.
67 *.ir := $(addprefix $(objpfx),$(foreach if,$(user-interfaces),$(if).ir))
69 ifndef inhibit_interface_rules
73 ifneq "$(*.ir)" "$(wildcard $(*.ir))"
74 # If any .ir file is missing, we will be unable to make all the deps.
77 generated += $(*.ir:$(objpfx)%=%)
81 # %.ir defines a variable `%-calls', which lists the RPCs defined by
82 # %.defs, and a rule to build $(%-calls:%=RPC_$(%-userprefix)%.c) from
83 # %.defs, where $(%-userprefix) is the user prefix given in %.defs. We use
84 # the kludgificacious method of defining a pattern rule to build files
85 # matching patterns we are pretty damn sure will only match the particular
86 # files we have in mind. To be so damn sure, we use the silly names
87 # RPC_*.c and the pattern R%C_*.c because using __*.c and _%*.c (or any
88 # other useful pattern) causes the rule for `host_info' to also match
89 # `xxx_host_info', and analogous lossage.
91 # Depend on %.h just so they will be built from %.uh in the
92 # makefile-rebuilding run which builds %.ir; otherwise, %.uh is built as an
93 # intermediate in order to make %.ir and then removed before re-exec, when
94 # %.uh is built all over again to build %.h.
95 $(objpfx)%.ir: $(objpfx)%.uh $(objpfx)%.h
96 ($(AWK) "NF == 4 && (\$$2 == \"Routine\" || \$$2 == \"SimpleRoutine\")\
97 { printf \"$*-calls += %s\\n\", \$$3 }" $< ;\
98 echo '$$($*-calls:%=$$(objpfx)R\%C_%.c): $$(objpfx)$*.ustamp ;';\
101 vpath Machrules ../mach # Find ourselves.
103 ifndef transform-user-stub-output
104 transform-user-stub-output = tmp
105 define transform-user-stub
106 echo "weak_alias (__$$call, $$call)" >> $(objpfx)tmp_$${call}.c;
111 # Generate `#include <NAME.defs>', taking $* for NAME.
112 # If $(NAME.defs) is defined use its value in place of `NAME.defs'.
113 define include-%.defs
114 echo '#include <$(firstword $($*.defs) $*.defs)>'
118 # Not an implicit rule so the stamps are never removed as intermediates!
119 $(patsubst %,$(objpfx)%.ustamp,$(user-interfaces)): $(objpfx)%.ustamp:
121 $(include-%.defs) | \
122 $(MIG) - /dev/null -prefix __ \
123 $(MIGFLAGS) $(user-MIGFLAGS) $(MIGFLAGS-$*) \
125 -server /dev/null -user /dev/null -header /dev/null
126 for call in $($*-calls); do \
127 $(transform-user-stub) \
128 $(move-if-change) $(objpfx)$(transform-user-stub-output)_$${call}.c \
129 $(objpfx)RPC_$${call}.c; \
132 -include $(patsubst %,$(objpfx)%.udeps,$(user-interfaces))
133 $(patsubst %,$(objpfx)%.udeps,$(user-interfaces)):
134 $(objpfx)%.udeps: $(..)mach/Machrules
135 $(make-target-directory)
136 # We must use $(CFLAGS) to get -O flags that affect #if's in header files.
137 $(include-%.defs) | \
138 $(CC) $(CFLAGS) $(CPPFLAGS) -M -x c - | \
139 sed -e 's,- *:,$(.udeps-targets):,' \
140 $(sed-remove-objpfx) > $@.new
142 .udeps-targets = $@ $(@:.udeps=.ustamp) $(@:.udeps=.uh) $(@:.udeps=.__h) \
143 $(@:.udeps=_server.c) $(@:.udeps=_server.h)
146 # Look for the server stub files where they will be written.
147 vpath %_server.c $(addprefix $(objpfx),$(sort $(dir $(server-interfaces))))
149 # Build the server stubs in $(objdir).
150 $(objpfx)%_server.c $(objpfx)%_server.h:
151 $(make-target-directory)
152 $(include-%.defs) | \
153 $(MIG) - /dev/null -prefix _S_ \
154 $(MIGFLAGS) $(server-MIGFLAGS) $(MIGFLAGS-$*) \
155 -user /dev/null -header /dev/null \
156 -server $(@:.h=.c) -sheader $(@:.c=.h)
158 # To get header files that declare both the straight and __ functions,
159 # we generate two files and paste them together.
160 $(patsubst %,$(objpfx)%.uh,$(user-interfaces)): $(objpfx)%.uh:; $(mig.uh)
162 $(make-target-directory)
163 $(include-%.defs) | \
164 $(MIG) - /dev/null $(MIGFLAGS) $(MIGFLAGS-$*) \
165 -header $@ -server /dev/null -user /dev/null
167 $(patsubst %,$(objpfx)%.__h,$(user-interfaces)): $(objpfx)%.__h:; $(mig.__h)
169 $(make-target-directory)
170 $(include-%.defs) | \
171 $(MIG) - /dev/null $(MIGFLAGS) $(MIGFLAGS-$*) -prefix __ \
172 -header $@ -server /dev/null -user /dev/null
175 $(patsubst %,$(objpfx)%.h,$(user-interfaces)): $(objpfx)%.h: $(objpfx)%.__h \
177 # The last line of foo.__h is "#endif _foo_user_".
178 # The first two lines of foo.uh are "#ifndef _foo_user_"/"#define _foo_user_".
179 (sed -e '$$d' $<; sed -e '1,2d' $(word 2,$^)) > $@-new
182 interface-routines := $(foreach if,$(user-interfaces), \
183 $(addprefix RPC_,$($(if)-calls))) \
184 $(server-interfaces:%=%_server)
185 interface-headers := $(user-interfaces:%=%.h) \
186 $(server-interfaces:%=%_server.h)
188 # Remove the generated user stub source and header files,
189 # and don't distribute them.
190 mach-generated = $(interface-routines:%=%.c) $(interface-headers) \
191 $(foreach h,$(user-interfaces),$h.uh $h.__h)
192 generated += $(mach-generated)
194 # These are needed to generate the dependencies.
195 before-compile += $(interface-headers:%=$(objpfx)%)
197 # Don't let these be intermediate files and get removed.
198 $(foreach h,$(interface-headers:%.h=$(objpfx)%),$h.h $h.__h $h.uh) :
199 $(interface-routines:%=$(objpfx)%.c) :
201 # Convenient target to generate all the headers.
202 .PHONY: interface-headers
203 interface-headers: $(interface-headers)
205 # Don't automatically generate dependencies for the sources we generate.
206 # There are likely to be a whole lot of them, and we know their
207 # dependencies ahead of time anyway because they're boilerplate.
208 omit-deps += $(interface-routines)
210 # Choose any single module generated by MiG. We will compute this module's
211 # dependencies and then assume all other MiG-generated modules depend on the
213 some-if-rtn := $(firstword $(interface-routines))
215 $(foreach o,$(object-suffixes),$(interfaces-routines:%=%$o)): $(some-if-rtn).d
216 generated += $(some-if-rtn).d
219 # If defined, $(interface-library) is `libNAME'. It is to be a library
220 # containing all the MiG-generated functions for the specified interfaces.
222 ifdef interface-library
224 $(interface-library)-routines = $(interface-routines)
225 extra-libs += $(interface-library)
226 extra-libs-others += $(interface-library)
228 ifeq (yes,$(build-shared))
229 interface.so = $(interface-library:=.so)
231 # Depend on libc.so so a DT_NEEDED is generated in the shared objects.
232 $(objpfx)$(interface.so): $(common-objpfx)libc.so