1 # Rules.make for uClibc
3 # This file contains rules which are shared between multiple Makefiles. All
4 # normal configuration options live in the file named "Config". You probably
5 # should not mess with this file unless you know what you are doing...
6 # -Erik Andersen <andersen@lineo.com> < andersee@debian.org>
8 # Copyright (C) 2000, 2001 by Lineo, inc.
10 # This program is free software; you can redistribute it and/or modify it under
11 # the terms of the GNU Library General Public License as published by the Free
12 # Software Foundation; either version 2 of the License, or (at your option) any
15 # This program is distributed in the hope that it will be useful, but WITHOUT
16 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 # FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more
20 # You should have received a copy of the GNU Library General Public License
21 # along with this program; if not, write to the Free Software Foundation, Inc.,
22 # 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 include $(TOPDIR)Config
31 SHARED_FULLNAME=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).so
32 SHARED_MAJORNAME=libc.so.$(MAJOR_VERSION)
33 UCLIBC_LDSO=ld-uclibc.so.$(MAJOR_VERSION)
34 LIBC=$(TOPDIR)libc/libc.a
36 BUILDTIME = $(shell TZ=UTC date --utc "+%Y.%m.%d-%H:%M%z")
38 GCCINCDIR = $(shell $(CC) -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
40 # use '-Os' optimization if available, else use -O2, allow Config to override
42 OPTIMIZATION = $(shell if $(CC) -Os -S -o /dev/null -xc /dev/null >/dev/null 2>&1; \
43 then echo "-Os"; else echo "-O2" ; fi)
48 CCFLAGS=$(WARNINGS) $(OPTIMIZATION) -fno-builtin -nostdinc $(CPUFLAGS) -I$(TOPDIR)include -I$(GCCINCDIR) -I. -D_LIBC
50 CFLAGS=$(ARCH_CFLAGS) $(CCFLAGS) $(DEFS) $(ARCH_CFLAGS2)
52 ifeq ($(strip $(DODEBUG)),true)
54 LDFLAGS = -nostdlib -Wl,-warn-common
55 STRIPTOOL = /bin/true -Since_we_are_debugging
57 CFLAGS += -DNDEBUG #-fomit-frame-pointer
58 LDFLAGS = -s -nostdlib -Wl,-warn-common
62 PREFIX = `pwd`/_install
65 NATIVE_ARCH = $(shell uname -m | sed -e 's/i.86/i386/' -e 's/sparc.*/sparc/' -e 's/arm.*/arm/g' -e 's/m68k.*/m68k/' -e 's/ppc/powerpc/g')
67 ifeq ($(strip $(HAS_MMU)),true)
71 LDSO_PRESENT=$(strip $(shell cd $(TOPDIR)/ldso/d-link; ls -d $(TARGET_ARCH) 2>/dev/null))
73 # NOTE: This may need to be modified for your system
74 ifeq ($(NATIVE_ARCH), $(TARGET_ARCH))
75 SYSTEM_LDSO=$(strip $(shell ldd `which $(CC)` | sed -ne /ld/p | sed -e s/\ =.*//g))
77 SYSTEM_LDSO=/lib/ld-linux.so.2
80 ifeq ($(LDSO_PRESENT), $(TARGET_ARCH))
81 LDSO=$(TOPDIR)lib/$(UCLIBC_LDSO)
82 DYNAMIC_LINKER=/lib/$(UCLIBC_LDSO)
85 DYNAMIC_LINKER=$(SYSTEM_LDSO)
88 # Disable libm if HAS_FLOATING_POINT isn't true.
89 ifneq ($(HAS_FLOATING_POINT),true)
90 HAS_LIBM_FLOAT = false
91 HAS_LIBM_DOUBLE = false
92 HAS_LIBM_LONG_DOUBLE = false
95 # It turns out the currently, function-sections causes ldelf2flt to segfault.
96 # So till further notice, this is disabled by default....
98 # Use '-ffunction-sections -fdata-sections' and '--gc-sections' if they work
99 # to try and strip out any unused junk automagically....
101 #ifeq ($(shell $(CC) -ffunction-sections -fdata-sections -S \
102 # -o /dev/null -xc /dev/null && $(LD) --gc-sections -v >/dev/null && echo 1),1)
103 # CFLAGS += -ffunction-sections -fdata-sections
104 # LDFLAGS += --gc-sections