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.
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 = ${shell uname -m | sed \
41 -e 's/sparc.*/sparc/' \
44 -e 's/ppc/powerpc/g' \
45 -e 's/v850.*/v850/g' \
46 -e 's/sh[234].*/sh/' \
49 ifeq ($(strip $(TARGET_ARCH)),)
50 TARGET_ARCH=${shell $(CC) -dumpmachine | sed -e s'/-.*//' \
52 -e 's/sparc.*/sparc/' \
55 -e 's/ppc/powerpc/g' \
56 -e 's/v850.*/v850/g' \
62 # Some nice architecture specific optimizations
66 # use '-Os' optimization if available, else use -O2, allow Config to override
67 OPTIMIZATION += ${shell if $(CC) -Os -S -o /dev/null -xc /dev/null >/dev/null 2>&1; \
68 then echo "-Os"; else echo "-O2" ; fi}
69 OPTIMIZATION += ${shell if $(CC) -falign-functions=1 -S -o /dev/null -xc \
70 /dev/null >/dev/null 2>&1; then echo "-falign-functions=1"; fi}
71 ifeq ($(strip $(TARGET_ARCH)),arm)
72 OPTIMIZATION+=-fstrict-aliasing
74 ifeq ($(strip $(TARGET_ARCH)),i386)
75 OPTIMIZATION+=-march=i386
76 OPTIMIZATION += ${shell if $(CC) -mpreferred-stack-boundary=2 -S -o /dev/null -xc \
77 /dev/null >/dev/null 2>&1; then echo "-mpreferred-stack-boundary=2"; fi}
78 OPTIMIZATION += ${shell if $(CC) -malign-functions=0 -malign-jumps=0 -malign-loops=0 \
79 -S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo \
80 "-malign-functions=0 -malign-jumps=0 -malign-loops=0"; fi}
89 CFLAGS=$(WARNINGS) $(OPTIMIZATION) -fno-builtin -nostdinc $(CPUFLAGS) \
90 -nostdinc -I$(TOPDIR)include -I$(GCCINCDIR) -I. -D_LIBC $(ARCH_CFLAGS)
91 NATIVE_CFLAGS=-O2 -Wall
93 ifeq ($(strip $(DODEBUG)),true)
95 LDFLAGS = -shared --warn-common --warn-once -z combreloc
96 STRIPTOOL = /bin/true -Since_we_are_debugging
98 CFLAGS += -DNDEBUG #-fomit-frame-pointer
99 LDFLAGS = -s -shared --warn-common --warn-once -z combreloc
102 ifeq ($(strip $(HAVE_SHARED)),true)
104 LIBRARY_CACHE=#-DUSE_CACHE
105 ifeq ($(strip $(BUILD_UCLIBC_LDSO)),true)
106 LDSO=$(TOPDIR)lib/$(UCLIBC_LDSO)
107 DYNAMIC_LINKER=$(SHARED_LIB_LOADER_PATH)/$(UCLIBC_LDSO)
108 BUILD_DYNAMIC_LINKER=${shell cd $(TOPDIR)lib && pwd}/$(UCLIBC_LDSO)
111 BUILD_UCLIBC_LDSO=false
112 DYNAMIC_LINKER=/lib/$(notdir $(SYSTEM_LDSO))
113 BUILD_DYNAMIC_LINKER=/lib/$(notdir $(SYSTEM_LDSO))
116 ifeq ($(strip $(DOPIC)),true)
120 # TARGET_PREFIX is the directory under which which the uClibc runtime
121 # environment will be installed and used on the target system. The
122 # result will look something like the following:
124 # lib/ <contains all runtime and static libs>
125 # usr/lib/ <this directory is searched for runtime libs>
126 # etc/ <weher the shared library cache and configuration
127 # information go if you enabled LIBRARY_CACHE above>
128 # Very few people will need to change this value from the default...