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...
7 # Copyright (C) 2000 by Lineo, inc.
8 # Copyright (C) 2000,2001 Erik Andersen <andersee@debian.org>
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 $(TOPDIR)Config
29 VERSION=$(MAJOR_VERSION).$(MINOR_VERSION)
32 SHARED_FULLNAME=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).so
33 SHARED_MAJORNAME=libc.so.$(MAJOR_VERSION)
34 UCLIBC_LDSO=ld-uClibc.so.$(MAJOR_VERSION)
35 LIBC=$(TOPDIR)libc/libc.a
37 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"}
39 NATIVE_ARCH = ${shell uname -m | sed \
41 -e 's/sparc.*/sparc/' \
44 -e 's/ppc/powerpc/g' \
45 -e 's/v850.*/v850/g' \
48 ifeq ($(strip $(TARGET_ARCH)),)
49 TARGET_ARCH=${shell $(CC) -dumpmachine | sed -e s'/-.*//' \
51 -e 's/sparc.*/sparc/' \
54 -e 's/ppc/powerpc/g' \
55 -e 's/v850.*/v850/g' \
60 # Some nice architecture specific optimizations
62 # use '-Os' optimization if available, else use -O2, allow Config to override
63 OPTIMIZATION += ${shell if $(CC) -Os -S -o /dev/null -xc /dev/null >/dev/null 2>&1; \
64 then echo "-Os"; else echo "-O2" ; fi}
65 OPTIMIZATION += ${shell if $(CC) -falign-functions=1 -S -o /dev/null -xc \
66 /dev/null >/dev/null 2>&1; then echo "-falign-functions=1"; fi}
67 ifeq ($(strip $(TARGET_ARCH)),arm)
68 OPTIMIZATION+=-fstrict-aliasing
70 ifeq ($(strip $(TARGET_ARCH)),i386)
71 OPTIMIZATION+=-march=i386
72 OPTIMIZATION += ${shell if $(CC) -mpreferred-stack-boundary=2 -S -o /dev/null -xc \
73 /dev/null >/dev/null 2>&1; then echo "-mpreferred-stack-boundary=2"; fi}
74 OPTIMIZATION += ${shell if $(CC) -malign-functions=0 -malign-jumps=0 -malign-loops=0 \
75 -S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo \
76 "-malign-functions=0 -malign-jumps=0 -malign-loops=0"; fi}
85 CFLAGS=$(WARNINGS) $(OPTIMIZATION) -fno-builtin -nostdinc $(CPUFLAGS) \
86 -nostdinc -I$(TOPDIR)include -I$(GCCINCDIR) -I. -D_LIBC $(ARCH_CFLAGS)
87 NATIVE_CFLAGS=-O2 -Wall
89 ifeq ($(strip $(DODEBUG)),true)
91 LDFLAGS = -shared -nostdlib --warn-common --warn-once -z combreloc
92 STRIPTOOL = /bin/true -Since_we_are_debugging
94 CFLAGS += -DNDEBUG #-fomit-frame-pointer
95 LDFLAGS = -s -shared -nostdlib --warn-common --warn-once -z combreloc
98 ifeq ($(strip $(HAVE_SHARED)),true)
99 LIBRARY_CACHE=#-DUSE_CACHE
100 ifeq ($(strip $(BUILD_UCLIBC_LDSO)),true)
101 LDSO=$(TOPDIR)lib/$(UCLIBC_LDSO)
102 DYNAMIC_LINKER=$(SHARED_LIB_LOADER_PATH)/$(UCLIBC_LDSO)
103 BUILD_DYNAMIC_LINKER=${shell cd $(TOPDIR)lib && pwd}/$(UCLIBC_LDSO)
106 DYNAMIC_LINKER=/lib/$(notdir $(SYSTEM_LDSO))
107 BUILD_DYNAMIC_LINKER=/lib/$(notdir $(SYSTEM_LDSO))
110 ifeq ($(strip $(DOPIC)),true)
111 CFLAGS += -fPIC -D__PIC__
114 # TARGET_PREFIX is the directory under which which the uClibc runtime
115 # environment will be installed and used on the target system. The
116 # result will look something like the following:
118 # lib/ <contains all runtime and static libs>
119 # usr/lib/ <this directory is searched for runtime libs>
120 # etc/ <weher the shared library cache and configuration
121 # information go if you enabled LIBRARY_CACHE above>
122 # Very few people will need to change this value from the default...