1 # Copyright (C) 1993-2016 Free Software Foundation, Inc.
2 # This file is part of the GNU C Library.
4 # The GNU C Library is free software; you can redistribute it and/or
5 # modify it under the terms of the GNU Lesser General Public
6 # License as published by the Free Software Foundation; either
7 # version 2.1 of the License, or (at your option) any later version.
9 # The GNU C Library is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 # Lesser General Public License for more details.
14 # You should have received a copy of the GNU Lesser General Public
15 # License along with the GNU C Library; if not, see
16 # <http://www.gnu.org/licenses/>.
20 # Look for header files in hurd/ under the top-level library source directory.
21 # Look for generated header files where they get created.
22 includes
+= -I
$(..
)hurd
-I
$(common-objpfx
)hurd
/
24 # We use the style `if (err = call(...))' a lot in the Hurd code,
25 # where we have a lot of functions that return zero or an errno code.
26 +cflags += -Wno-parentheses
28 # Do not use any assembly code from sysdeps/unix (and subdirectories).
29 # This bypasses all the system call stubs and uses any existing posix or
30 # generic C files instead.
31 inhibit-sysdep-asm
+= unix.
*
32 inhibit-unix-syscalls
= yes
34 # Don't try to generate anything from the installed Unix system and its
35 # libraries. That is only of use when building for a Unix system, so as to
36 # be compatible with some existing binaries for that system.
39 ifeq (,$(filter mach hurd
,$(subdir
)))
40 # Subdirectories other than hurd/ might use the generated Hurd headers.
41 # So make sure we get a chance to run in hurd/ to make them before all else.
42 # (But we don't want to do this in mach/, because hurd/ needs some things
43 # there, and we know mach/ doesn't need anything from hurd/.)
45 hurd-objpfx
= $(common-objpfx
)hurd
/
47 # These are all the generated headers that <hurd.h> includes.
48 before-compile
+= $(patsubst %,$(hurd-objpfx
)hurd
/%.h
,auth io fs process
)
49 $(patsubst %,$(hurd-objpfx
)hurd
/%.h
,auth io fs process
): hurd-before-compile
50 .PHONY
: hurd-before-compile
51 hurd-before-compile
: $(common-objpfx
)mach
/mach-shortcuts.h
52 $(MAKE
) -C
$(..
)hurd subdir
=hurd before-compile no_deps
=t
55 # Hurd profil.c includes this file, so give a rule to make it.
57 $(common-objpfx
)hurd
/..
/mach
/RPC_task_get_sampled_pcs.c
:
58 $(MAKE
) -C
$(..
)mach subdir
=mach before-compile no_deps
=t
62 # Generate bits/errno.h from the section of the manual that lists all the errno
65 errno.texinfo
= $(..
)manual
/errno.texi
67 hurd
= $(..
)sysdeps
/mach
/hurd
70 ($(foreach h
,mach
/message.h \
73 device
/device_types.h
,\
74 echo
'#include <$h>';\
78 # We use the compiler to generate a list of absolute file names for
79 # the headers we want to search for Mach error codes, listed above (and
80 # incidentally, all other headers those include).
81 -include $(common-objpfx
)errnos.d
82 $(common-objpfx
)errnos.d
: $(mach-errnos-deps
)
85 $(subst -include $(common-objpfx
)libc-modules.h
,,$(CPPFLAGS
)) \
87 sed
$(sed-remove-objpfx
) -e
's,- *:,mach-errnos-deps :=,' \
88 -e
's, \.\./, $(..),g' > $@t
91 $(hurd
)/bits
/errno.h
: $(common-objpfx
)stamp-errnos
;
92 $(common-objpfx
)stamp-errnos
: $(hurd
)/errnos.awk
$(errno.texinfo
) \
93 $(mach-errnos-deps
) $(common-objpfx
)errnos.d
94 $(AWK
) -f
$^
> $(hurd
)/bits
/errno.h-tmp
95 # Make it unwritable so noone will edit it by mistake.
96 -chmod a-w
$(hurd
)/bits
/errno.h-tmp
97 $(move-if-change
) $(hurd
)/bits
/errno.h-tmp
$(hurd
)/bits
/errno.h
100 common-generated
+= errnos.d stamp-errnos
102 # We install the real libc.a as libcrt.a and as libc.a we install a linker
103 # script which does -( -lcrt -lmachuser -lhurduser -).
108 install-others
+= $(inst_libdir
)/libc.a
109 $(inst_libdir
)/libc.a
: $(hurd
)/libc-ldscript
$(+force); $(do-install
)
110 ifeq (yes
,$(build-profile
))
111 install-others
+= $(inst_libdir
)/libc_p.a
112 $(inst_libdir
)/libc_p.a
: $(hurd
)/libc_p-ldscript
$(+force); $(do-install
)
116 # Make sure these are used to build the libc.so shared object too. There
117 # is a circular dependency between each of these shared objects and libc
118 # (many high-level libc functions call stubs, stubs call low-level libc
119 # functions like memcpy and mach_msg). This works out fine at run time
120 # (all the objects are loaded before resolving their symbols, so these
121 # interdependencies are fine). But to create the shared objects we must
122 # link them one at a time; since each needs one or both of the others to
123 # produce its DT_NEEDED entries and to assign its undefined symbols the
124 # right symbol versions, we can't do any of them before the others! To
125 # get around this, we link each lib*user.so shared object twice. First,
126 # we link an object without reference to libc.so (since we haven't linked
127 # libc.so yet), so it lacks a DT_NEEDED record for the libc soname it
128 # depends on, and its undefined symbol references lack the symbol version
129 # assignments they should have. We will use this shared object solely to
130 # link libc.so against it; that gives libc.so the proper DT_NEEDED record,
131 # and symbol versions assignments (if the lib*user.so object is using them).
132 # Finally we link a second version of the same lib*user.so shared object,
133 # this time linked normally against libc so it gets a proper DT_NEEDED
134 # record and symbol version set; this one can be installed for run-time use.
135 rpcuserlibs
:= $(common-objpfx
)mach
/libmachuser.so \
136 $(common-objpfx
)hurd
/libhurduser.so
137 link-rpcuserlibs
:= $(rpcuserlibs
:%user.so
=%user-link.so
)
138 $(common-objpfx
)libc.so
: $(link-rpcuserlibs
)
139 $(common-objpfx
)linkobj
/libc.so
: $(link-rpcuserlibs
)
140 rpath-dirs
+= mach hurd
142 # Make sure the `lib' pass builds the dummy shared objects so
143 # we can link libc against them.
144 ifeq (mach
,$(subdir
))
145 lib-noranlib
: $(common-objpfx
)mach
/libmachuser-link.so
147 ifeq (hurd
,$(subdir
))
148 lib-noranlib
: $(common-objpfx
)hurd
/libhurduser-link.so
151 $(link-rpcuserlibs
): %-link.so
: %_pic.a
152 # These shared objects are just for the purpose of linking libc,
153 # so they don't need abi-note.o linked into them.
154 $(build-shlib-helper
) \
156 -Wl
,-soname
=$(*F
).so
$($(*F
).so-version
) \
157 $(build-shlib-objlist
)
158 libmachuser-link.so-no-z-defs
= yes
159 libhurduser-link.so-no-z-defs
= yes
161 # And get them into the libc.so ldscript.
162 $(inst_libdir
)/libc.so
: $(rpcuserlibs
)
164 # The RPC stubs from these libraries are needed in building the dynamic
165 # linker, too. It must be self-contained, so we link the needed PIC
166 # objects directly into the shared object.
168 $(objpfx
)librtld.map
: $(rpcuserlibs
:.so
=_pic.a
)
170 CFLAGS-dl-load.c
= -DEXTERNAL_MAP_FROM_FD
173 # Override the generic Makeconfig values so we link against the RPC libs.
174 link-libc-static
:= -Wl
,--start-group \
175 $(patsubst %,$(common-objpfx
)%.a
,\
176 libc mach
/libmachuser hurd
/libhurduser
) \
177 $(static-gnulib
) -Wl
,--end-group
178 link-libc-static-tests
:= -Wl
,--start-group \
179 $(patsubst %,$(common-objpfx
)%.a
,\
180 libc mach
/libmachuser hurd
/libhurduser
) \
181 $(static-gnulib-tests
) -Wl
,--end-group
185 extra-objs
+= static-start.o
187 # We need special startup code for statically linked binaries.
188 $(objpfx
)crt0.o
: $(objpfx
)static-start.o
$(objpfx
)abi-note.o
$(objpfx
)init.o
193 ifeq (hurd
, $(subdir
))
194 sysdep_routines
+= cthreads
197 ifeq ($(subdir
),sunrpc
)
198 sysdep_headers
+= nfs
/nfs.h
201 ifeq ($(subdir
),socket
)
202 sysdep_headers
+= net
/ethernet.h net
/if_arp.h net
/if_ether.h net
/if_ppp.h \