1# 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
18CFLAGS-libc :=# intentionally left blank
19LDFLAGS-$(UCLIBC_FORMAT_DSBT_ELF)-libc.so := -Wl,--dsbt-index=2
20LDFLAGS-libc.so := $(LDFLAGS) $(VERSION_SCRIPT) -Wl,-init,$(SYMBOL_PREFIX)__uClibc_init
21LIBS-libc.so := $(interp) $(ldso) $(top_builddir)lib/$(NONSHARED_LIBNAME) $(top_builddir)lib/$(NONSHARED_LIBPTHREAD)
22
23# we have SHARED_LIBNAME=libc.so.$(ABI_VERSION) defined in Rules.mak
24libc_FULL_NAME := libuClibc-$(VERSION).so
25
26# this comes first, so duplicate removal works correctly
27include $(libc_DIR)/sysdeps/Makefile.in
28
29include $(libc_DIR)/misc/Makefile.in
30include $(libc_DIR)/pwd_grp/Makefile.in
31include $(libc_DIR)/stdio/Makefile.in
32include $(libc_DIR)/string/Makefile.in
33include $(libc_DIR)/termios/Makefile.in
34include $(libc_DIR)/inet/Makefile.in
35include $(libc_DIR)/signal/Makefile.in
36include $(libc_DIR)/stdlib/Makefile.in
37include $(libc_DIR)/unistd/Makefile.in
38
39ifeq ($(DOPIC),y)
40libc-a-y = $(libc-y:.o=.os) $(libc-static-y:.o=.os)
41else
42libc-a-y = $(libc-y) $(libc-static-y)
43endif
44
45libc-a-$(HAVE_SHARED) += $(libdl-a-y)
46libc-a-$(DO_C99_MATH) += $(libm-a-y)
47libc-a-$(UCLIBC_HAS_LIBUTIL) += $(libutil-a-y)
48libc-a-$(UCLIBC_HAS_CRYPT) += $(libcrypt-a-y)
49libc-a-$(UCLIBC_HAS_ARGP) += $(libuargp-a-y)
50libc-a-$(UCLIBC_HAS_THREADS) += $(libpthread-a-y)
51libc-a-$(UCLIBC_HAS_REALTIME) += $(librt-a-y)
52libc-a-$(UCLIBC_HAS_BACKTRACE) += $(libubacktrace-a-y)
53libc-a-$(UCLIBC_HAS_LIBICONV) += $(libiconv-a-y)
54libc-a-$(UCLIBC_HAS_LIBINTL) += $(libintl-a-y)
55
56libc-so-y = $(libc-y:.o=.os) $(libc-shared-y)
57
58libc-so-y += $(libdl-so-y)
59libc-so-$(DO_C99_MATH) += $(libm-so-y)
60libc-so-$(UCLIBC_HAS_LIBUTIL) += $(libutil-so-y)
61libc-so-$(UCLIBC_HAS_CRYPT) += $(libcrypt-so-y)
62libc-so-$(UCLIBC_HAS_ARGP) += $(libuargp-so-y)
63libc-so-$(UCLIBC_HAS_THREADS) += $(libpthread-so-y)
64libc-so-$(UCLIBC_HAS_REALTIME) += $(librt-so-y)
65libc-so-$(UCLIBC_HAS_BACKTRACE) += $(libubacktrace-so-y)
66libc-so-$(UCLIBC_HAS_LIBICONV) += $(libiconv-so-y)
67libc-so-$(UCLIBC_HAS_LIBINTL) += $(libintl-so-y)
68
69lib-a-y += $(top_builddir)lib/libc.a
70lib-gdb-y += $(top_builddir)lib/libc.gdb
71lib-so-y += $(libc.depend)
72objclean-y += CLEAN_libc
73
74OUTPUT_FORMAT = $(CC) $(CFLAGS) -Wl,--verbose 2>&1 | $(SED) -n '/OUTPUT_FORMAT/,/)/p'
75
76$(libc.depend): $(libc_OUT)/libc_so.a $(LIBS-libc.so)
77	$(call link.so,$(libc_FULL_NAME),$(ABI_VERSION))
78	# link for backward compatibility
79	$(call link.so,$(libc_FULL_NAME),0)
80	$(Q)$(RM) $@
81	$(Q)cat $(top_srcdir)extra/scripts/format.lds > $@.tmp
82	$(Q)$(OUTPUT_FORMAT) >> $@.tmp
83	$(Q)echo "GROUP ( $(SHARED_LIBNAME) $(NONSHARED_LIBNAME) $(NONSHARED_LIBPTHREAD) $(ASNEEDED) )" >> $@.tmp
84	$(Q)mv $@.tmp $@
85
86$(libc_OUT)/libc_so.a: $(libc-so-y) | $(top_builddir)lib/libc.a $(top_builddir)lib/$(NONSHARED_LIBNAME)
87	$(Q)$(RM) $@
88ifeq ($(DOPIC),y)
89	$(Q)$(STRIPTOOL) $(STRIP_FLAGS) $(libc-shared-y)
90else
91	$(do_strip)
92endif
93	$(do_ar)
94
95$(libc_OUT)/libc.oS: $(libc-multi-y) | $(top_builddir)lib/libc.a $(top_builddir)lib/$(NONSHARED_LIBNAME)
96	$(Q)$(RM) $@
97	$(compile-m)
98
99$(top_builddir)lib/libc.a: $(libc-a-y)
100	$(Q)$(RM) $@
101	$(do_ar)
102
103# We use libc_so.a so that we can compile the shared library with special
104# flags - i.e. -mleaf-id-shared-library.  The static libc.a needs to be
105# compiled without it.
106$(top_builddir)lib/libc.gdb: $(libc_OUT)/libc_so.a $(LINK_FLAT_CRTS)
107	$(call link-flat.so,$(@:.gdb=),$(UCLIBC_SHARED_FLAT_ID))
108
109CLEAN_libc:
110	$(do_rm) $(addprefix $(libc_OUT)/*., o os oS a)
111