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b168057a 1# Copyright (C) 1993-2015 Free Software Foundation, Inc.
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2# This file is part of the GNU C Library.
3
4# The GNU C Library is free software; you can redistribute it and/or
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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.
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8
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
41bdb6e2 12# Lesser General Public License for more details.
28f540f4 13
41bdb6e2 14# You should have received a copy of the GNU Lesser General Public
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15# License along with the GNU C Library; if not, see
16# <http://www.gnu.org/licenses/>.
28f540f4 17
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18ifdef in-Makerules
19
28f540f4 20# Look for header files in hurd/ under the top-level library source directory.
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21# Look for generated header files where they get created.
22includes += -I$(..)hurd -I$(common-objpfx)hurd/
28f540f4 23
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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
27
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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.
346d65b3 31inhibit-sysdep-asm += unix.*
4ca84cff 32inhibit-unix-syscalls = yes
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33
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.
37inhibit-glue = yes
38
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39ifeq (,$(filter mach hurd,$(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/.)
44
6e953631 45hurd-objpfx = $(common-objpfx)hurd/
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46
47# These are all the generated headers that <hurd.h> includes.
924840c5 48before-compile += $(patsubst %,$(hurd-objpfx)hurd/%.h,auth io fs process)
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49$(patsubst %,$(hurd-objpfx)hurd/%.%,auth io fs process): \
50 $(common-objpfx)mach/mach-shortcuts.h
bd78530f 51 $(MAKE) -C $(..)hurd before-compile no_deps=t
28f540f4 52endif
924840c5 53
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54# Hurd profil.c includes this file, so give a rule to make it.
55ifeq ($(subdir),gmon)
56$(common-objpfx)hurd/../mach/RPC_task_get_sampled_pcs.c:
bd78530f 57 $(MAKE) -C $(..)mach before-compile no_deps=t
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58endif
59
28f540f4 60\f
75d0cab2 61# Generate bits/errno.h from the section of the manual that lists all the errno
b25ae9c6 62# codes.
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63
64errno.texinfo = $(..)manual/errno.texi
65
66hurd = $(..)sysdeps/mach/hurd
67
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68define mach-errno-h
69($(foreach h,mach/message.h \
70 mach/kern_return.h \
71 mach/mig_errors.h \
72 device/device_types.h,\
73 echo '#include <$h>';\
74 ))
75endef
76
77# We use the compiler to generate a list of absolute file names for
78# the headers we want to search for Mach error codes, listed above (and
79# incidentally, all other headers those include).
80-include $(common-objpfx)errnos.d
81$(common-objpfx)errnos.d: $(mach-errnos-deps)
82 $(mach-errno-h) | \
0dc87bc6 83 $(CC) $(CFLAGS) $(CPPFLAGS) -M -x c - | \
d7bca0d3 84 sed $(sed-remove-objpfx) -e 's,- *:,mach-errnos-deps :=,' \
224a12bc 85 -e 's, \.\./, $(..),g' > $@t
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86 mv -f $@t $@
87
75d0cab2 88$(hurd)/bits/errno.h: $(common-objpfx)stamp-errnos ;
aa1075ea 89$(common-objpfx)stamp-errnos: $(hurd)/errnos.awk $(errno.texinfo) \
46db1cb0 90 $(mach-errnos-deps) $(common-objpfx)errnos.d
75d0cab2 91 $(AWK) -f $^ > $(hurd)/bits/errno.h-tmp
28f540f4 92# Make it unwritable so noone will edit it by mistake.
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93 -chmod a-w $(hurd)/bits/errno.h-tmp
94 $(move-if-change) $(hurd)/bits/errno.h-tmp $(hurd)/bits/errno.h
28f540f4 95 touch $@
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96
97common-generated += errnos.d stamp-errnos
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98\f
99# We install the real libc.a as libcrt.a and as libc.a we install a linker
100# script which does -( -lcrt -lmachuser -lhurduser -).
101
102libc-name = crt
103
104ifeq (,$(subdir))
3635e76a 105install-others += $(inst_libdir)/libc.a
73237de3 106$(inst_libdir)/libc.a: $(hurd)/libc-ldscript $(+force); $(do-install)
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107ifeq (yes,$(build-profile))
108install-others += $(inst_libdir)/libc_p.a
73237de3 109$(inst_libdir)/libc_p.a: $(hurd)/libc_p-ldscript $(+force); $(do-install)
28f540f4 110endif
3635e76a 111endif
11872325 112
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113# Make sure these are used to build the libc.so shared object too. There
114# is a circular dependency between each of these shared objects and libc
115# (many high-level libc functions call stubs, stubs call low-level libc
116# functions like memcpy and mach_msg). This works out fine at run time
117# (all the objects are loaded before resolving their symbols, so these
118# interdependencies are fine). But to create the shared objects we must
119# link them one at a time; since each needs one or both of the others to
120# produce its DT_NEEDED entries and to assign its undefined symbols the
121# right symbol versions, we can't do any of them before the others! To
122# get around this, we link each lib*user.so shared object twice. First,
123# we link an object without reference to libc.so (since we haven't linked
124# libc.so yet), so it lacks a DT_NEEDED record for the libc soname it
125# depends on, and its undefined symbol references lack the symbol version
126# assignments they should have. We will use this shared object solely to
127# link libc.so against it; that gives libc.so the proper DT_NEEDED record,
128# and symbol versions assignments (if the lib*user.so object is using them).
129# Finally we link a second version of the same lib*user.so shared object,
130# this time linked normally against libc so it gets a proper DT_NEEDED
131# record and symbol version set; this one can be installed for run-time use.
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132rpcuserlibs := $(common-objpfx)mach/libmachuser.so \
133 $(common-objpfx)hurd/libhurduser.so
0702b5f4 134link-rpcuserlibs := $(rpcuserlibs:%user.so=%user-link.so)
5407f442 135$(common-objpfx)libc.so: $(link-rpcuserlibs)
510bbf14 136$(common-objpfx)linkobj/libc.so: $(link-rpcuserlibs)
6598ac30 137rpath-dirs += mach hurd
c7fd2f47 138
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139# Make sure the `lib' pass builds the dummy shared objects so
140# we can link libc against them.
141ifeq (mach,$(subdir))
142lib-noranlib: $(common-objpfx)mach/libmachuser-link.so
143endif
144ifeq (hurd,$(subdir))
145lib-noranlib: $(common-objpfx)hurd/libhurduser-link.so
146endif
147
0702b5f4 148$(link-rpcuserlibs): %-link.so: %_pic.a
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149# These shared objects are just for the purpose of linking libc,
150# so they don't need abi-note.o linked into them.
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151 $(build-shlib-helper) \
152 -nostdlib -o $@ \
e17f3859 153 -Wl,-soname=$(*F).so$($(*F).so-version) \
c7414a8e 154 $(build-shlib-objlist)
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155libmachuser-link.so-no-z-defs = yes
156libhurduser-link.so-no-z-defs = yes
0702b5f4 157
8a523922 158# And get them into the libc.so ldscript.
8d57beea 159$(inst_libdir)/libc.so: $(rpcuserlibs)
8a523922 160
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161# The RPC stubs from these libraries are needed in building the dynamic
162# linker, too. It must be self-contained, so we link the needed PIC
163# objects directly into the shared object.
164ifeq (elf,$(subdir))
f1c5213d 165$(objpfx)librtld.map: $(rpcuserlibs:.so=_pic.a)
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166
167CFLAGS-dl-load.c = -DEXTERNAL_MAP_FROM_FD
c7fd2f47 168endif
c82e6116 169
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170# Override the generic Makeconfig values so we link against the RPC libs.
171link-libc-static := -Wl,--start-group \
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172 $(patsubst %,$(common-objpfx)%.a,\
173 libc mach/libmachuser hurd/libhurduser) \
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174 $(static-gnulib) -Wl,--end-group
175link-libc-static-tests := -Wl,--start-group \
176 $(patsubst %,$(common-objpfx)%.a,\
177 libc mach/libmachuser hurd/libhurduser) \
178 $(static-gnulib-tests) -Wl,--end-group
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179\f
180ifeq ($(subdir),csu)
181
182extra-objs += static-start.o
183
184# We need special startup code for statically linked binaries.
185$(objpfx)crt0.o: $(objpfx)static-start.o $(objpfx)abi-note.o $(objpfx)init.o
186 $(link-relocatable)
187
c82e6116 188endif
28f540f4 189\f
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190ifeq (hurd, $(subdir))
191sysdep_routines += cthreads
192endif
28f540f4 193
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194ifeq ($(subdir),sunrpc)
195sysdep_headers += nfs/nfs.h
196endif
197
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198ifeq ($(subdir),socket)
199sysdep_headers += net/ethernet.h net/if_arp.h net/if_ether.h net/if_ppp.h \
200 net/route.h
201endif
202
28f540f4 203endif # in-Makerules