1 # Rules.make for uClibc
3 # Copyright (C) 2000 by Lineo, inc.
4 # Copyright (C) 2000-2002 Erik Andersen <andersen@uclibc.org>
6 # This program is free software; you can redistribute it and/or modify it under
7 # the terms of the GNU Library General Public License as published by the Free
8 # Software Foundation; either version 2 of the License, or (at your option) any
11 # This program is distributed in the hope that it will be useful, but WITHOUT
12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13 # FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more
16 # You should have received a copy of the GNU Library General Public License
17 # along with this program; if not, write to the Free Software Foundation, Inc.,
18 # 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #--------------------------------------------------------
22 # This file contains rules which are shared between multiple Makefiles.
23 # All normal configuration options live in the file named ".config".
24 # Don't mess with this file unless you know what you are doing.
27 #--------------------------------------------------------
28 # If you are running a cross compiler, you will want to set 'CROSS'
29 # to something more interesting... Target architecture is determined
30 # by asking the CC compiler what arch it compiles things for, so unless
31 # your compiler is broken, you should not need to specify TARGET_ARCH
33 # Most people will set this stuff on the command line, i.e.
34 # make CROSS=mipsel-linux-
35 # will build uClibc for 'mipsel'.
42 STRIPTOOL= $(CROSS)strip
44 # Select the compiler needed to build binaries for your development system
46 NATIVE_CFLAGS=-O2 -Wall
49 #--------------------------------------------------------
50 # Nothing beyond this point should ever be touched by mere mortals.
51 # Unless you hang out with the gods, you should probably leave all
56 VERSION:=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
57 # Ensure consistent filename sort order
59 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_COLLATE
61 SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
62 SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
63 UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
65 LIBC:=$(TOPDIR)libc/$(LIBNAME)
67 # Pull in the user's uClibc configuration
68 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
70 -include $(TOPDIR).config
73 # A nifty macro to make testing gcc features easier
74 check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
75 then echo "$(1)"; else echo "$(2)"; fi)
77 # check if we have nawk, otherwise user awk
78 AWK:=$(shell if [ -x /usr/bin/nawk ]; then echo "/usr/bin/nawk"; \
79 else echo "/usr/bin/awk"; fi)
81 NATIVE_ARCH:= $(shell uname -m | sed \
83 -e 's/sparc.*/sparc/' \
86 -e 's/ppc/powerpc/g' \
87 -e 's/v850.*/v850/g' \
88 -e 's/sh[234].*/sh/' \
91 ifeq ($(strip $(TARGET_ARCH)),)
92 TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
94 -e 's/sparc.*/sparc/' \
97 -e 's/ppc/powerpc/g' \
98 -e 's/v850.*/v850/g' \
100 -e 's/mips-.*/mips/' \
101 -e 's/mipsel-.*/mipsel/' \
102 -e 's/cris.*/cris/' \
109 # use '-Os' optimization if available, else use -O2, allow Config to override
111 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
113 # Some nice CPU specific optimizations
114 ifeq ($(strip $(TARGET_ARCH)),i386)
115 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
116 OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
117 CPU_CFLAGS-$(CONFIG_386):="-march=i386"
118 CPU_CFLAGS-$(CONFIG_486):="-march=i486"
119 CPU_CFLAGS-$(CONFIG_586):="-march=i586"
120 CPU_CFLAGS-$(CONFIG_586MMX):="$(call check_gcc,-march=pentium-mmx,-march=i586)"
121 CPU_CFLAGS-$(CONFIG_686):="-march=i686"
122 CPU_CFLAGS-$(CONFIG_PENTIUMIII):="$(call check_gcc,-march=pentium3,-march=i686)"
123 CPU_CFLAGS-$(CONFIG_PENTIUM4):="$(call check_gcc,-march=pentium4,-march=i686)"
124 CPU_CFLAGS-$(CONFIG_K6):="$(call check_gcc,-march=k6,-march=i586)"
125 CPU_CFLAGS-$(CONFIG_K7):="$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)"
126 CPU_CFLAGS-$(CONFIG_CRUSOE):="-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0"
127 CPU_CFLAGS-$(CONFIG_WINCHIPC6):="$(call check_gcc,-march=winchip-c6,-march=i586)"
128 CPU_CFLAGS-$(CONFIG_WINCHIP2):="$(call check_gcc,-march=winchip2,-march=i586)"
129 CPU_CFLAGS-$(CONFIG_CYRIXIII):="$(call check_gcc,-march=c3,-march=i586)"
132 ifeq ($(strip $(TARGET_ARCH)),arm)
133 OPTIMIZATION+=-fstrict-aliasing
134 CPU_CFLAGS-$(CONFIG_GENERIC_ARM):=
135 CPU_CFLAGS-$(CONFIG_ARM7TDMI):="-mcpu=arm7tdmi"
136 CPU_CFLAGS-$(CONFIG_STRONGARM):="-mcpu=strongarm"
137 CPU_CFLAGS-$(CONFIG_XSCALE):="$(call check_gcc,-mcpu=xscale,-mcpu=strongarm)"
140 ifeq ($(strip $(TARGET_ARCH)),sh)
141 OPTIMIZATION+=-fstrict-aliasing
142 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
143 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):="-EL"
144 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):="-EB"
145 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):="-ml"
146 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):="-mb"
147 CPU_CFLAGS-$(CONFIG_SH2)+="-m2"
148 CPU_CFLAGS-$(CONFIG_SH3)+="-m3"
149 CPU_CFLAGS-$(CONFIG_SH4)+="-m4"
150 CPU_CFLAGS-$(CONFIG_SH5)+="-m5"
153 # Add a bunch of extra pedantic annoyingly strict checks
154 WARNINGS+=-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
156 # Some nice CFLAGS to work with
157 CFLAGS:=$(WARNINGS) $(OPTIMIZATION) -fno-builtin -nostdinc $(CPUFLAGS) \
158 -D_LIBC $(CPU_CFLAGS-y) $(ARCH_CFLAGS) -I$(TOPDIR)include -I.
160 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
161 #CFLAGS+=-iwithprefix include
162 CFLAGS+=$(shell $(CC) -print-search-dirs | sed -ne "s/install: *\(.*\)/-I\1include/gp")
165 ifeq ($(strip $(DODEBUG)),y)
167 LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
168 STRIPTOOL:= true -Since_we_are_debugging
170 LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
172 ifneq ($(strip $(DOASSERTS)),y)
176 ifeq ($(strip $(HAVE_SHARED)),y)
177 LIBRARY_CACHE:=#-DUSE_CACHE
178 ifeq ($(strip $(BUILD_UCLIBC_LDSO)),y)
179 LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
180 DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PATH)/$(UCLIBC_LDSO)
181 BUILD_DYNAMIC_LINKER:=$(shell cd $(TOPDIR) && pwd)/lib/$(UCLIBC_LDSO)
184 DYNAMIC_LINKER:=/lib/$(notdir $(SYSTEM_LDSO))
185 BUILD_DYNAMIC_LINKER:=/lib/$(notdir $(SYSTEM_LDSO))
188 ifeq ($(strip $(DOPIC)),y)
191 ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
192 CFLAGS += $(call check_gcc,-msoft-float,)
195 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
196 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
197 LIBGCC_DIR:=$(dir $(LIBGCC))
199 # TARGET_PREFIX is the directory under which which the uClibc runtime
200 # environment will be installed and used on the target system. The
201 # result will look something like the following:
203 # lib/ <contains all runtime and static libs>
204 # usr/lib/ <this directory is searched for runtime libs>
205 # etc/ <weher the shared library cache and configuration
206 # information go if you enabled LIBRARY_CACHE above>
207 # Very few people will need to change this value from the default...