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
|
# Subroutine makefile for compiling libc modules linked into dynamic linker.
# Copyright (C) 2002-2018 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/>.
# This makefile is never used by itself, but only from the rtld-libc.a
# rule in Makefile, which does make -f librtld.mk -f rtld-Rules.
# librtld.mk is the generated file containing variable definitions for
# `rtld-subdirs', a subset of the top-level $(subdirs) list; and for each
# SUBDIR in $(rtld-subdirs), `rtld-SUBDIR' listing `module.os' file names.
.PHONY: rtld-all
rtld-all:
# When run from the elf/Makefile to build rtld-libc.a, $(subdir) is elf.
ifneq ($(subdir),elf)
ifndef rtld-modules
$(error rtld-modules not set)
endif
endif
ifndef rtld-modules
# Running to build rtld-libc.a, driving runs of $(rtld-subdir-make), below.
ifndef rtld-subdirs
$(error This makefile is a subroutine of elf/Makefile not to be used directly)
endif
include ../Makeconfig
rtld-all: $(objpfx)rtld-libc.a
$(objpfx)rtld-libc.a: $(foreach dir,$(rtld-subdirs),\
$(addprefix $(common-objpfx)$(dir)/rtld-,\
$(rtld-$(dir))))
@-rm -f $@T
$(AR) cq$(verbose) $@T $^
mv -f $@T $@
# Use the verbose option of ar and tar when not running silently.
ifeq "$(findstring s,$(MAKEFLAGS))" "" # if not -s
verbose := v
else # -s
verbose :=
endif # not -s
# For each subdirectory, define a pattern rule that makes all of that
# subdirectory's modules at once with one recursive make command.
object-suffixes-left := $(rtld-subdirs)
define o-iterator-doit
$(foreach obj,$(rtld-$o),$(common-objpfx)%/rtld-$(obj)): FORCE ; \
+$$(rtld-subdir-make)
endef
include $(patsubst %,../o-iterator.mk,$(object-suffixes-left))
# This is how we descend into each subdirectory. See below.
define rtld-subdir-make
$(MAKE) $(subdir-args) objdir=$(objdir) \
-f Makefile -f ../elf/rtld-Rules rtld-all \
rtld-modules='$(addprefix rtld-,$(rtld-$*))'
endef
# See subdir-target-args in ../Makefile for the model.
subdir-args = subdir=$*$(if $($*-srcdir),\
-C $($*-srcdir) ..=`pwd`/,\
-C $(..)$* ..=../)
FORCE:
else
# In this case we are being run by $(rtld-subdir-make), above.
# Some other subdir's Makefile has provided all its normal rules,
# and we just provide some additional definitions.
rtld-compile-command.S = $(compile-command.S) $(rtld-CPPFLAGS)
rtld-compile-command.s = $(compile-command.s) $(rtld-CPPFLAGS)
rtld-compile-command.c = $(compile-command.c) $(rtld-CPPFLAGS) $(rtld-CFLAGS)
# These are the basic compilation rules corresponding to the Makerules ones.
# The sysd-rules generated makefile already defines pattern rules for rtld-%
# targets built from sysdeps source files.
$(objpfx)rtld-%.os: rtld-%.S $(before-compile)
$(rtld-compile-command.S)
$(objpfx)rtld-%.os: rtld-%.s $(before-compile)
$(rtld-compile-command.s)
$(objpfx)rtld-%.os: rtld-%.c $(before-compile)
$(rtld-compile-command.c)
$(objpfx)rtld-%.os: %.S $(before-compile)
$(rtld-compile-command.S)
$(objpfx)rtld-%.os: %.s $(before-compile)
$(rtld-compile-command.s)
$(objpfx)rtld-%.os: %.c $(before-compile)
$(rtld-compile-command.c)
# The rules for generated source files.
$(objpfx)rtld-%.os: $(objpfx)rtld-%.S $(before-compile)
$(rtld-compile-command.S)
$(objpfx)rtld-%.os: $(objpfx)rtld-%.s $(before-compile)
$(rtld-compile-command.s)
$(objpfx)rtld-%.os: $(objpfx)rtld-%.c $(before-compile)
$(rtld-compile-command.c)
$(objpfx)rtld-%.os: $(objpfx)%.S $(before-compile)
$(rtld-compile-command.S)
$(objpfx)rtld-%.os: $(objpfx)%.s $(before-compile)
$(rtld-compile-command.s)
$(objpfx)rtld-%.os: $(objpfx)%.c $(before-compile)
$(rtld-compile-command.c)
# The command line setting of rtld-modules (see above) tells us
# what we need to build, and that tells us what dependency files we need.
rtld-all: $(addprefix $(objpfx),$(rtld-modules))
# Figure out the dependency files we need. After respecting the $(omit-deps)
# list as applied to the names without the `rtld-', there may be none left.
rtld-depfiles := $(patsubst %,$(objpfx)rtld-%.os.d,\
$(filter-out $(omit-deps),\
$(rtld-modules:rtld-%.os=%)))
rtld-depfiles := $(strip $(wildcard $(rtld-depfiles)) \
$(patsubst %.dt,%.d,\
$(wildcard $(rtld-depfiles:.d=.dt))))
ifdef rtld-depfiles
-include $(rtld-depfiles)
endif
# This here is the whole point of all the shenanigans.
# Set libof-* for each routine.
cpp-srcs-left := $(rtld-modules:%.os=%)
lib := rtld
include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left))
rtld-CFLAGS += $(no-stack-protector)
endif
|
