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lh9ed821d2023-04-07 01:36:19 -07001# Makefile for uClibc
2#
3# Copyright (C) 2000-2008 Erik Andersen <andersen@uclibc.org>
4#
5# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
6#
7
8libc_DIR := $(top_srcdir)libc
9libc_OUT := $(top_builddir)libc
10
11# Check if the target architecture has a version script for
12# libc, and if so, include it when linking.
13VERSION_SCRIPT := $(wildcard $(libc_DIR)/sysdeps/linux/$(TARGET_ARCH)/libc.map)
14ifneq ($(VERSION_SCRIPT),)
15VERSION_SCRIPT := -Wl,--version-script,$(VERSION_SCRIPT)
16endif
17
18LDFLAGS-$(UCLIBC_FORMAT_DSBT_ELF)-libc.so := -Wl,--dsbt-index=2
19LDFLAGS-libc.so := $(LDFLAGS) $(VERSION_SCRIPT) -Wl,-init,$(SYMBOL_PREFIX)__uClibc_init
20ifeq ($(UCLIBC_HAS_STDIO_FUTEXES),y)
21CFLAGS += -D__USE_STDIO_FUTEXES__
22endif
23LIBS-libc.so := $(interp) $(ldso) $(top_builddir)lib/$(NONSHARED_LIBNAME)
24
25# we have SHARED_LIBNAME=libc.so.$(ABI_VERSION) defined in Rules.mak
26libc_FULL_NAME := libuClibc-$(VERSION).so
27
28# this comes first, so duplicate removal works correctly
29include $(libc_DIR)/sysdeps/Makefile.in
30
31include $(libc_DIR)/misc/Makefile.in
32include $(libc_DIR)/pwd_grp/Makefile.in
33include $(libc_DIR)/stdio/Makefile.in
34include $(libc_DIR)/string/Makefile.in
35include $(libc_DIR)/termios/Makefile.in
36include $(libc_DIR)/inet/Makefile.in
37include $(libc_DIR)/signal/Makefile.in
38include $(libc_DIR)/stdlib/Makefile.in
39include $(libc_DIR)/unistd/Makefile.in
40
41ifeq ($(DOPIC),y)
42libc-a-y = $(libc-y:.o=.os) $(libc-static-y:.o=.os)
43else
44libc-a-y = $(libc-y) $(libc-static-y)
45endif
46
47ifeq ($(DOMULTI),n)
48libc-so-y = $(libc-y:.o=.os) $(libc-shared-y)
49else
50all_sources = $(libc-y:.o=.c)
51all_sources += $(libc-shared-y:.oS=.c)
52libc-multi-y = $(filter-out $(libc-nomulti-y:.o=.c),$(all_sources))
53endif
54
55lib-a-y += $(top_builddir)lib/libc.a
56lib-gdb-y += $(top_builddir)lib/libc.gdb
57lib-so-y += $(libc.depend)
58objclean-y += CLEAN_libc
59
60OUTPUT_FORMAT = $(CC) $(CFLAGS) -Wl,--verbose 2>&1 | $(SED) -n '/OUTPUT_FORMAT/,/)/p'
61
62ifeq ($(DOMULTI),n)
63$(libc.depend): $(libc_OUT)/libc_so.a $(LIBS-libc.so)
64 $(call link.so,$(libc_FULL_NAME),$(ABI_VERSION))
65else
66$(libc.depend): $(libc_OUT)/libc.oS $(libc-nomulti-y:.o=.oS) | $(LIBS-libc.so)
67 $(call linkm.so,$(libc_FULL_NAME),$(ABI_VERSION))
68endif
69 $(Q)$(RM) $@
70 $(Q)cat $(top_srcdir)extra/scripts/format.lds > $@.tmp
71 $(Q)$(OUTPUT_FORMAT) >> $@.tmp
72ifeq ($(COMPAT_ATEXIT),y)
73 $(Q)echo "GROUP ( $(NONSHARED_LIBNAME) $(SHARED_LIBNAME) $(ASNEEDED) )" >> $@.tmp
74else
75 $(Q)echo "GROUP ( $(SHARED_LIBNAME) $(NONSHARED_LIBNAME) $(ASNEEDED) )" >> $@.tmp
76endif
77 $(Q)mv $@.tmp $@
78
79$(libc_OUT)/libc_so.a: $(libc-so-y) | $(top_builddir)lib/libc.a $(top_builddir)lib/$(NONSHARED_LIBNAME)
80 $(Q)$(RM) $@
81ifeq ($(DOPIC),y)
82 $(Q)$(STRIPTOOL) $(STRIP_FLAGS) $(libc-shared-y)
83else
84 $(do_strip)
85endif
86 $(do_ar)
87
88$(libc_OUT)/libc.oS: $(libc-multi-y) | $(top_builddir)lib/libc.a $(top_builddir)lib/$(NONSHARED_LIBNAME)
89 $(Q)$(RM) $@
90 $(compile-m)
91
92$(top_builddir)lib/libc.a: $(libc-a-y) | $(crt-y)
93 $(Q)$(INSTALL) -d $(dir $@)
94 $(Q)$(RM) $@
95 $(do_ar)
96
97# We use libc_so.a so that we can compile the shared library with special
98# flags - i.e. -mleaf-id-shared-library. The static libc.a needs to be
99# compiled without it.
100$(top_builddir)lib/libc.gdb: $(libc_OUT)/libc_so.a $(LINK_FLAT_CRTS)
101 $(call link-flat.so,$(@:.gdb=),$(UCLIBC_SHARED_FLAT_ID))
102
103CLEAN_libc:
104 $(do_rm) $(addprefix $(libc_OUT)/*., o os oS a)