1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
# Rules for MiG interfaces that want to go into the C library.
# Copyright (C) 1991-2018 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <http://www.gnu.org/licenses/>.
# Makefiles may define these variable before including this file:
# user-interfaces Names of interfaces to put user stubs in for.
# server-interfaces Names of interfaces to put server stubs in for.
# interface-library Name of interface library to build and install.
# This file sets:
# interface-headers Names of generated interface header files.
# interface-routines Names of generated interface routines.
# All user stubs are put in individual files, prefixed with RPC_; header
# for both __ and non-__ names is put in foo.h. Server interfaces are
# written to foo_server.c and foo_server.h; the server functions are called
# _S_rpcname.
# Includers can also add to or modify `migdefines' to set MiG flags.
all:
# Make sure no value comes from the environment, since we append to it.
# This is done also in ../Rules, but we append to the value before
# including Rules, which changes the origin.
ifneq "$(findstring env,$(origin generated))" ""
generated :=
endif
include ../Makeconfig
# This makefile contains a lot of implicit rules that get optimized
# away if the target directory does not exist.
ifndef no_deps
-include $(objpfx)dummy.mk
endif
$(objpfx)dummy.mk:
$(make-target-directory)
echo '# Empty' > $@
MIGFLAGS = -DMACH_IPC_COMPAT=0 -DSTANDALONE -DTypeCheck=0 \
$(+includes) $(migdefines) -subrprefix __
# Putting CC in the enivronment makes the mig wrapper script
# use the same compiler setup we are using to run cpp.
MIG := CC='${CC}' CPP='${CPP} -x c' $(MIG)
.SUFFIXES: .defs # Just to set specified_rule_matched.
define nl # This is needed by *.ir.
endef
ifdef user-interfaces
*.ir := $(addprefix $(objpfx),$(foreach if,$(user-interfaces),$(if).ir))
ifndef no_deps
ifndef inhibit_interface_rules
-include $(*.ir)
endif
endif
ifneq "$(*.ir)" "$(wildcard $(*.ir))"
# If any .ir file is missing, we will be unable to make all the deps.
no_deps=t
endif
generated += $(*.ir:$(objpfx)%=%)
endif
# %.ir defines a variable `%-calls', which lists the RPCs defined by
# %.defs, and a rule to build $(%-calls:%=RPC_$(%-userprefix)%.c) from
# %.defs, where $(%-userprefix) is the user prefix given in %.defs. We use
# the kludgificacious method of defining a pattern rule to build files
# matching patterns we are pretty damn sure will only match the particular
# files we have in mind. To be so damn sure, we use the silly names
# RPC_*.c and the pattern R%C_*.c because using __*.c and _%*.c (or any
# other useful pattern) causes the rule for `host_info' to also match
# `xxx_host_info', and analogous lossage.
#
# Depend on %.h just so they will be built from %.uh in the
# makefile-rebuilding run which builds %.ir; otherwise, %.uh is built as an
# intermediate in order to make %.ir and then removed before re-exec, when
# %.uh is built all over again to build %.h.
$(objpfx)%.ir: $(objpfx)%.uh $(objpfx)%.h
($(AWK) "NF == 4 && (\$$2 == \"Routine\" || \$$2 == \"SimpleRoutine\")\
{ printf \"$*-calls += %s\\n\", \$$3 }" $< ;\
echo '$$($*-calls:%=$$(objpfx)R\%C_%.c): $$(objpfx)$*.ustamp ;';\
) > $@-new
mv -f $@-new $@
vpath Machrules ../mach # Find ourselves.
ifndef transform-user-stub-output
transform-user-stub-output = tmp
define transform-user-stub
echo "weak_alias (__$$call, $$call)" >> $(objpfx)tmp_$${call}.c;
endef
endif
# Generate `#include <NAME.defs>', taking $* for NAME.
# If $(NAME.defs) is defined use its value in place of `NAME.defs'.
define include-%.defs
echo '#include <$(firstword $($*.defs) $*.defs)>'
endef
ifndef no_deps
# Not an implicit rule so the stamps are never removed as intermediates!
$(patsubst %,$(objpfx)%.ustamp,$(user-interfaces)): $(objpfx)%.ustamp:
rm -f $@
$(include-%.defs) | \
$(MIG) - /dev/null -prefix __ \
$(MIGFLAGS) $(user-MIGFLAGS) $(MIGFLAGS-$*) \
-i $(objpfx)tmp_ \
-server /dev/null -user /dev/null -header /dev/null
for call in $($*-calls); do \
$(transform-user-stub) \
$(move-if-change) $(objpfx)$(transform-user-stub-output)_$${call}.c \
$(objpfx)RPC_$${call}.c; \
done
touch $@
-include $(patsubst %,$(objpfx)%.udeps,$(user-interfaces))
$(patsubst %,$(objpfx)%.udeps,$(user-interfaces)):
$(objpfx)%.udeps: $(..)mach/Machrules
$(make-target-directory)
# We must use $(CFLAGS) to get -O flags that affect #if's in header files.
$(include-%.defs) | \
$(CC) $(CFLAGS) $(CPPFLAGS) -M -x c - | \
sed -e 's,- *:,$(.udeps-targets):,' \
$(sed-remove-objpfx) > $@.new
mv -f $@.new $@
.udeps-targets = $@ $(@:.udeps=.ustamp) $(@:.udeps=.uh) $(@:.udeps=.__h) \
$(@:.udeps=_server.c) $(@:.udeps=_server.h)
endif
# Look for the server stub files where they will be written.
vpath %_server.c $(addprefix $(objpfx),$(sort $(dir $(server-interfaces))))
# Build the server stubs in $(objdir).
$(objpfx)%_server.c $(objpfx)%_server.h:
$(make-target-directory)
$(include-%.defs) | \
$(MIG) - /dev/null -prefix _S_ \
$(MIGFLAGS) $(server-MIGFLAGS) $(MIGFLAGS-$*) \
-user /dev/null -header /dev/null \
-server $(@:.h=.c) -sheader $(@:.c=.h)
# To get header files that declare both the straight and __ functions,
# we generate two files and paste them together.
$(patsubst %,$(objpfx)%.uh,$(user-interfaces)): $(objpfx)%.uh:; $(mig.uh)
define mig.uh
$(make-target-directory)
$(include-%.defs) | \
$(MIG) - /dev/null $(MIGFLAGS) $(MIGFLAGS-$*) \
-header $@ -server /dev/null -user /dev/null
endef
$(patsubst %,$(objpfx)%.__h,$(user-interfaces)): $(objpfx)%.__h:; $(mig.__h)
define mig.__h
$(make-target-directory)
$(include-%.defs) | \
$(MIG) - /dev/null $(MIGFLAGS) $(MIGFLAGS-$*) -prefix __ \
-header $@ -server /dev/null -user /dev/null
endef
$(patsubst %,$(objpfx)%.h,$(user-interfaces)): $(objpfx)%.h: $(objpfx)%.__h \
$(objpfx)%.uh
# The last line of foo.__h is "#endif _foo_user_".
# The first two lines of foo.uh are "#ifndef _foo_user_"/"#define _foo_user_".
(sed -e '$$d' $<; sed -e '1,2d' $(word 2,$^)) > $@-new
mv -f $@-new $@
interface-routines := $(foreach if,$(user-interfaces), \
$(addprefix RPC_,$($(if)-calls))) \
$(server-interfaces:%=%_server)
interface-headers := $(user-interfaces:%=%.h) \
$(server-interfaces:%=%_server.h)
# Remove the generated user stub source and header files,
# and don't distribute them.
mach-generated = $(interface-routines:%=%.c) $(interface-headers) \
$(foreach h,$(user-interfaces),$h.uh $h.__h)
generated += $(mach-generated)
# These are needed to generate the dependencies.
before-compile += $(interface-headers:%=$(objpfx)%)
# Don't let these be intermediate files and get removed.
$(foreach h,$(interface-headers:%.h=$(objpfx)%),$h.h $h.__h $h.uh) :
$(interface-routines:%=$(objpfx)%.c) :
# Convenient target to generate all the headers.
.PHONY: interface-headers
interface-headers: $(interface-headers)
# Don't automatically generate dependencies for the sources we generate.
# There are likely to be a whole lot of them, and we know their
# dependencies ahead of time anyway because they're boilerplate.
omit-deps += $(interface-routines)
# Choose any single module generated by MiG. We will compute this module's
# dependencies and then assume all other MiG-generated modules depend on the
# same headers.
some-if-rtn := $(firstword $(interface-routines))
ifdef some-if-rtn
$(foreach o,$(object-suffixes),$(interfaces-routines:%=%$o)): $(some-if-rtn).d
generated += $(some-if-rtn).d
endif
# If defined, $(interface-library) is `libNAME'. It is to be a library
# containing all the MiG-generated functions for the specified interfaces.
ifdef interface-library
$(interface-library)-routines = $(interface-routines) stack_chk_fail_local
extra-libs += $(interface-library)
extra-libs-others += $(interface-library)
ifeq (yes,$(build-shared))
interface.so = $(interface-library:=.so)
# Depend on libc.so so a DT_NEEDED is generated in the shared objects.
$(objpfx)$(interface.so): $(common-objpfx)libc.so
endif
endif
|
