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
|
# Copyright (C) 1993-2021 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
# <https://www.gnu.org/licenses/>.
ifdef in-Makerules
# Look for header files in hurd/ under the top-level library source directory.
# Look for generated header files where they get created.
includes += -I$(..)hurd -I$(common-objpfx)hurd/
# We use the style `if (err = call(...))' a lot in the Hurd code,
# where we have a lot of functions that return zero or an errno code.
+cflags += -Wno-parentheses
# Do not use any assembly code from sysdeps/unix (and subdirectories).
# This bypasses all the system call stubs and uses any existing posix or
# generic C files instead.
inhibit-sysdep-asm += unix.*
inhibit-unix-syscalls = yes
# Don't try to generate anything from the installed Unix system and its
# libraries. That is only of use when building for a Unix system, so as to
# be compatible with some existing binaries for that system.
inhibit-glue = yes
ifeq (,$(filter mach hurd,$(subdir)))
# Subdirectories other than hurd/ might use the generated Hurd headers.
# So make sure we get a chance to run in hurd/ to make them before all else.
# (But we don't want to do this in mach/, because hurd/ needs some things
# there, and we know mach/ doesn't need anything from hurd/.)
hurd-objpfx = $(common-objpfx)hurd/
# These are all the generated headers that <hurd.h> includes.
before-compile += $(patsubst %,$(hurd-objpfx)hurd/%.h,auth io fs process)
$(patsubst %,$(hurd-objpfx)hurd/%.h,auth io fs process): hurd-before-compile
.PHONY: hurd-before-compile
hurd-before-compile: $(common-objpfx)mach/mach-shortcuts.h
$(MAKE) -C $(..)hurd subdir=hurd before-compile no_deps=t
endif
# Hurd profil.c includes this file, so give a rule to make it.
ifeq ($(subdir),gmon)
$(common-objpfx)hurd/../mach/RPC_task_get_sampled_pcs.c:
$(MAKE) -C $(..)mach subdir=mach before-compile no_deps=t
endif
# Generate bits/errno.h from the section of the manual that lists all the errno
# codes.
errno.texinfo = $(..)manual/errno.texi
hurd = $(..)sysdeps/mach/hurd
define mach-errno-h
($(foreach h,mach/message.h \
mach/kern_return.h \
mach/mig_errors.h \
device/device_types.h,\
echo '#include <$h>';\
))
endef
# We use the compiler to generate a list of absolute file names for
# the headers we want to search for Mach error codes, listed above (and
# incidentally, all other headers those include).
-include $(common-objpfx)errnos.d
$(common-objpfx)errnos.d: $(mach-errnos-deps)
$(mach-errno-h) | \
$(CC) $(CFLAGS) \
$(subst -include $(common-objpfx)libc-modules.h,,$(CPPFLAGS)) \
-M -x c - | \
sed $(sed-remove-objpfx) -e 's,- *:,mach-errnos-deps :=,' \
-e 's, \.\./, $(..),g' > $@t
mv -f $@t $@
$(hurd)/bits/errno.h: $(common-objpfx)stamp-errnos ;
$(common-objpfx)stamp-errnos: $(hurd)/errnos.awk $(errno.texinfo) \
$(mach-errnos-deps) $(common-objpfx)errnos.d
mkdir -p $(hurd-objpfx)bits
$(AWK) -f $^ > $(hurd-objpfx)bits/errno.h-tmp
# Make it unwritable so noone will edit it by mistake.
-chmod a-w $(hurd-objpfx)bits/errno.h-tmp
$(move-if-change) $(hurd-objpfx)bits/errno.h-tmp $(hurd)/bits/errno.h
touch $@
common-generated += errnos.d stamp-errnos
# We install the real libc.a as libcrt.a and as libc.a we install a linker
# script which does -( -lcrt -lmachuser -lhurduser -).
libc-name = crt
ifeq (,$(subdir))
install-others += $(inst_libdir)/libc.a
$(inst_libdir)/libc.a: $(hurd)/libc-ldscript $(+force); $(do-install)
ifeq (yes,$(build-profile))
install-others += $(inst_libdir)/libc_p.a
$(inst_libdir)/libc_p.a: $(hurd)/libc_p-ldscript $(+force); $(do-install)
endif
endif
# Make sure these are used to build the libc.so shared object too. There
# is a circular dependency between each of these shared objects and libc
# (many high-level libc functions call stubs, stubs call low-level libc
# functions like memcpy and mach_msg). This works out fine at run time
# (all the objects are loaded before resolving their symbols, so these
# interdependencies are fine). But to create the shared objects we must
# link them one at a time; since each needs one or both of the others to
# produce its DT_NEEDED entries and to assign its undefined symbols the
# right symbol versions, we can't do any of them before the others! To
# get around this, we link each lib*user.so shared object twice. First,
# we link an object without reference to libc.so (since we haven't linked
# libc.so yet), so it lacks a DT_NEEDED record for the libc soname it
# depends on, and its undefined symbol references lack the symbol version
# assignments they should have. We will use this shared object solely to
# link libc.so against it; that gives libc.so the proper DT_NEEDED record,
# and symbol versions assignments (if the lib*user.so object is using them).
# Finally we link a second version of the same lib*user.so shared object,
# this time linked normally against libc so it gets a proper DT_NEEDED
# record and symbol version set; this one can be installed for run-time use.
rpcuserlibs := $(common-objpfx)mach/libmachuser.so \
$(common-objpfx)hurd/libhurduser.so
link-rpcuserlibs := $(rpcuserlibs:%user.so=%user-link.so)
$(common-objpfx)libc.so: $(link-rpcuserlibs)
$(common-objpfx)linkobj/libc.so: $(link-rpcuserlibs)
rpath-dirs += mach hurd
# Make sure the `lib' pass builds the dummy shared objects so
# we can link libc against them.
ifeq (mach,$(subdir))
lib-noranlib: $(common-objpfx)mach/libmachuser-link.so
endif
ifeq (hurd,$(subdir))
lib-noranlib: $(common-objpfx)hurd/libhurduser-link.so
endif
$(link-rpcuserlibs): %-link.so: %_pic.a
# These shared objects are just for the purpose of linking libc,
# so they don't need abi-note.o linked into them.
$(build-shlib-helper) \
-nostdlib -o $@ \
-Wl,-soname=$(*F).so$($(*F).so-version) \
$(build-shlib-objlist)
libmachuser-link.so-no-z-defs = yes
libhurduser-link.so-no-z-defs = yes
# And get them into the libc.so ldscript.
$(inst_libdir)/libc.so: $(rpcuserlibs)
# The RPC stubs from these libraries are needed in building the dynamic
# linker, too. It must be self-contained, so we link the needed PIC
# objects directly into the shared object.
ifeq (elf,$(subdir))
$(objpfx)librtld.map: $(rpcuserlibs:.so=_pic.a)
CFLAGS-dl-load.c = -DEXTERNAL_MAP_FROM_FD
endif
# Override the generic Makeconfig values so we link against the RPC libs.
link-libc-static := -Wl,--start-group \
$(patsubst %,$(common-objpfx)%.a,\
libc mach/libmachuser hurd/libhurduser) \
$(static-gnulib) -Wl,--end-group
link-libc-static-tests := -Wl,--start-group \
$(patsubst %,$(common-objpfx)%.a,\
libc mach/libmachuser hurd/libhurduser) \
$(static-gnulib-tests) -Wl,--end-group
ifeq ($(subdir),csu)
extra-objs += static-start.o
# We need special startup code for statically linked binaries.
$(objpfx)crt0.o: $(objpfx)static-start.o $(objpfx)abi-note.o $(objpfx)init.o
$(link-relocatable)
endif
ifeq (hurd, $(subdir))
sysdep_routines += cthreads
endif
ifeq (io, $(subdir))
sysdep_routines += f_setlk close_nocancel close_nocancel_nostatus \
fcntl_nocancel open_nocancel openat_nocancel read_nocancel \
pread64_nocancel write_nocancel pwrite64_nocancel \
wait4_nocancel \
xstat fxstat lxstat xstat64 fxstat64 lxstat64 \
xmknod xmknodat \
fxstatat fxstatat64
endif
ifeq (misc, $(subdir))
sysdep_routines += writev_nocancel writev_nocancel_nostatus mremap
endif
ifeq ($(subdir),sunrpc)
sysdep_headers += nfs/nfs.h
endif
ifeq ($(subdir),socket)
sysdep_headers += net/ethernet.h net/if_arp.h net/if_ether.h net/route.h
endif
ifeq ($(subdir),nis)
CFLAGS-ypclnt.c += -DUSE_BINDINGDIR=1
endif
LDLIBS-pthread.so += $(objdir)/hurd/libhurduser.so
LDLIBS-c_malloc_debug.so += $(link-rpcuserlibs)
endif # in-Makerules
|
