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'.
44 STRIPTOOL= $(CROSS)strip
46 # Select the compiler needed to build binaries for your development system
51 #--------------------------------------------------------
52 # Nothing beyond this point should ever be touched by mere mortals.
53 # Unless you hang out with the gods, you should probably leave all
58 VERSION:=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
59 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
61 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
63 SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
64 SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
65 UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
67 LIBC:=$(TOPDIR)libc/$(LIBNAME)
69 # Pull in the user's uClibc configuration
70 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
71 -include $(TOPDIR).config
74 # A nifty macro to make testing gcc features easier
75 check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
76 then echo "$(1)"; else echo "$(2)"; fi)
78 # check if we have nawk, otherwise user awk
79 AWK:=$(shell if [ -x /usr/bin/nawk ]; then echo "/usr/bin/nawk"; \
80 else echo "/usr/bin/awk"; fi)
82 HOST_ARCH:= $(shell uname -m | sed \
84 -e 's/sparc.*/sparc/' \
87 -e 's/ppc/powerpc/g' \
88 -e 's/v850.*/v850/g' \
89 -e 's/sh[234].*/sh/' \
92 ifeq ($(strip $(TARGET_ARCH)),)
93 TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
95 -e 's/sparc.*/sparc/' \
98 -e 's/ppc/powerpc/g' \
99 -e 's/v850.*/v850/g' \
101 -e 's/mips-.*/mips/' \
102 -e 's/mipsel-.*/mipsel/' \
103 -e 's/cris.*/cris/' \
111 # Some nice CPU specific optimizations
112 ifeq ($(strip $(TARGET_ARCH)),i386)
113 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
114 OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
115 CPU_CFLAGS-$(CONFIG_386):="-march=i386"
116 CPU_CFLAGS-$(CONFIG_486):="-march=i486"
117 CPU_CFLAGS-$(CONFIG_586):="-march=i586"
118 CPU_CFLAGS-$(CONFIG_586MMX):="$(call check_gcc,-march=pentium-mmx,-march=i586)"
119 CPU_CFLAGS-$(CONFIG_686):="-march=i686"
120 CPU_CFLAGS-$(CONFIG_PENTIUMIII):="$(call check_gcc,-march=pentium3,-march=i686)"
121 CPU_CFLAGS-$(CONFIG_PENTIUM4):="$(call check_gcc,-march=pentium4,-march=i686)"
122 CPU_CFLAGS-$(CONFIG_K6):="$(call check_gcc,-march=k6,-march=i586)"
123 CPU_CFLAGS-$(CONFIG_K7):="$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)"
124 CPU_CFLAGS-$(CONFIG_CRUSOE):="-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0"
125 CPU_CFLAGS-$(CONFIG_WINCHIPC6):="$(call check_gcc,-march=winchip-c6,-march=i586)"
126 CPU_CFLAGS-$(CONFIG_WINCHIP2):="$(call check_gcc,-march=winchip2,-march=i586)"
127 CPU_CFLAGS-$(CONFIG_CYRIXIII):="$(call check_gcc,-march=c3,-march=i586)"
130 ifeq ($(strip $(TARGET_ARCH)),arm)
131 OPTIMIZATION+=-fstrict-aliasing
132 CPU_CFLAGS-$(CONFIG_GENERIC_ARM):=
133 CPU_CFLAGS-$(CONFIG_ARM7TDMI):="-march=arm7tdmi"
134 CPU_CFLAGS-$(CONFIG_STRONGARM):="-march=strongarm"
135 CPU_CFLAGS-$(CONFIG_XSCALE):="-march=xscale"
138 ifeq ($(strip $(TARGET_ARCH)),sh)
139 OPTIMIZATION+=-fstrict-aliasing
140 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
141 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):="-EL"
142 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):="-EB"
143 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):="-ml"
144 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):="-mb"
145 CPU_CFLAGS-$(CONFIG_SH2)+="-m2"
146 CPU_CFLAGS-$(CONFIG_SH3)+="-m3"
147 CPU_CFLAGS-$(CONFIG_SH4)+="-m4"
148 CPU_CFLAGS-$(CONFIG_SH5)+="-m5"
151 ifeq ($(strip $(TARGET_ARCH)),h8300)
152 CPU_LDFLAGS-y:=-mh8300h
153 CPU_CFLAGS-y+=-mh -mint32 -fsigned-char
156 ifeq ($(strip $(TARGET_ARCH)),cris)
157 CPU_LDFLAGS-$(CONFIG_CRIS):="-mcrislinux"
158 CPU_CFLAGS-$(CONFIG_CRIS):="-mlinux"
161 # use '-Os' optimization if available, else use -O2, allow Config to override
162 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
165 # Add a bunch of extra pedantic annoyingly strict checks
166 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
167 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
168 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
169 # Some nice CFLAGS to work with
170 CFLAGS:=$(XWARNINGS) $(OPTIMIZATION) $(XARCH_CFLAGS) $(CPU_CFLAGS) \
171 -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
175 LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
176 STRIPTOOL:= true -Since_we_are_debugging
178 LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
181 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
182 #CFLAGS+=-iwithprefix include
183 CFLAGS+=$(shell $(CC) -print-search-dirs | sed -ne "s/install: *\(.*\)/-I\1include/gp")
185 ifneq ($(DOASSERTS),y)
189 ifeq ($(HAVE_SHARED),y)
190 LIBRARY_CACHE:=#-DUSE_CACHE
191 ifeq ($(BUILD_UCLIBC_LDSO),y)
192 LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
193 DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PATH)/$(UCLIBC_LDSO)
194 BUILD_DYNAMIC_LINKER:=$(shell cd $(TOPDIR) && pwd)/lib/$(UCLIBC_LDSO)
197 DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
198 BUILD_DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
201 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
202 CFLAGS += $(call check_gcc,-msoft-float,)
205 CFLAGS_NOPIC:=$(CFLAGS)
207 ifeq ($(strip $(TARGET_ARCH)),cris)
208 CFLAGS += -fpic -mlinux
214 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
215 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
216 LIBGCC_DIR:=$(dir $(LIBGCC))
218 # TARGET_PREFIX is the directory under which which the uClibc runtime
219 # environment will be installed and used on the target system. The
220 # result will look something like the following:
222 # lib/ <contains all runtime and static libs>
223 # usr/lib/ <this directory is searched for runtime libs>
224 # etc/ <weher the shared library cache and configuration
225 # information go if you enabled LIBRARY_CACHE above>
226 # Very few people will need to change this value from the default...
229 ########################################
231 # uClinux shared lib support
234 ifdef CONFIG_BINFMT_SHARED_FLAT
235 # For the shared version of this, we specify no stack and its library ID
238 export LIBID FLTFLAGS
239 SHARED_TARGET = lib/libc