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=arm-linux-
35 # will build uClibc for 'arm'.
38 CROSS=/mnt/src/jocke/bb5/buildroot/build_powerpc_nofpu/staging_dir/bin/powerpc-linux-uclibc-
44 STRIPTOOL= $(CROSS)strip
50 # Select the compiler needed to build binaries for your development system
55 #--------------------------------------------------------
56 # Nothing beyond this point should ever be touched by mere mortals.
57 # Unless you hang out with the gods, you should probably leave all
62 VERSION:=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
63 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
65 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
67 SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
68 SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
69 UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
71 LIBC:=$(TOPDIR)libc/$(LIBNAME)
73 # Pull in the user's uClibc configuration
74 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
75 -include $(TOPDIR).config
78 # A nifty macro to make testing gcc features easier
79 check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
80 then echo "$(1)"; else echo "$(2)"; fi)
82 # Make certain these contain a final "/", but no "//"s.
83 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
84 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
85 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
86 export RUNTIME_PREFIX DEVEL_PREFIX
93 # Some nice CPU specific optimizations
94 ifeq ($(strip $(TARGET_ARCH)),i386)
95 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
96 OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
97 CPU_CFLAGS-$(CONFIG_386)+=-march=i386
98 CPU_CFLAGS-$(CONFIG_486)+=-march=i486
99 CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
100 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
101 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
102 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
103 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
104 CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
105 CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
106 CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
107 CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)
108 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0
109 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
110 CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
111 CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) -malign-functions=0 -malign-jumps=0 -malign-loops=0
112 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
115 ifeq ($(strip $(TARGET_ARCH)),arm)
116 OPTIMIZATION+=-fstrict-aliasing
117 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
118 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
119 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
120 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
121 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
122 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
123 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
124 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
125 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
126 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
127 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
128 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
129 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
130 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
131 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
134 ifeq ($(strip $(TARGET_ARCH)),mips)
135 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
136 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
137 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
138 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
139 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
140 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
143 ifeq ($(strip $(TARGET_ARCH)),sh)
144 OPTIMIZATION+=-fstrict-aliasing
145 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
146 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
147 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
148 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
149 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
150 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
151 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
152 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
155 ifeq ($(strip $(TARGET_ARCH)),sh64)
156 OPTIMIZATION+=-fstrict-aliasing
157 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
158 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
159 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
160 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
161 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
164 ifeq ($(strip $(TARGET_ARCH)),h8300)
165 CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
166 CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
167 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
168 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
171 ifeq ($(strip $(TARGET_ARCH)),cris)
172 CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
173 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
177 ifeq ($(strip $(TARGET_ARCH)),powerpc)
178 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
179 # enough. Therefore use -fpic which will reduce code size and generates
184 ifeq ($(strip $(TARGET_ARCH)),frv)
185 CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
186 CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
189 # Using -pie causes the program to have an interpreter, which is
190 # forbidden, so we must make do with -shared. Unfortunately,
191 # -shared by itself would get us global function descriptors
192 # and calls through PLTs, dynamic resolution of symbols, etc,
193 # which would break as well, but -Bsymbolic comes to the rescue.
194 LDPIEFLAG=-shared -Bsymbolic
198 # Use '-Os' optimization if available, else use -O2, allow Config to override
199 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
200 # Use the gcc 3.4 -funit-at-a-time optimization when available
201 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
204 # Add a bunch of extra pedantic annoyingly strict checks
205 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
206 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
207 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
210 ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
211 # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
212 # If -msoft-float isn't supported, we want an error anyway.
213 # Hmm... might need to revisit this for arm since it has 2 different
214 # soft float encodings.
215 CPU_CFLAGS += -msoft-float
216 ifeq ($(strip $(TARGET_ARCH)),arm)
217 # No longer needed with current toolchains, but leave it here for now.
218 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
219 # LDADD_LIBFLOAT=-lfloat
223 # Some nice CFLAGS to work with
224 CFLAGS=$(XWARNINGS) $(OPTIMIZATION) $(XARCH_CFLAGS) $(CPU_CFLAGS) \
225 -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
229 CFLAGS = $(XWARNINGS) -O0 -g3 $(CPU_CFLAGS) -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
230 LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
231 STRIPTOOL:= true -Since_we_are_debugging
233 LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
236 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
237 #CFLAGS+=-iwithprefix include
238 CFLAGS+=$(shell $(CC) -print-search-dirs | sed -ne "s/install: *\(.*\)/-I\1include/gp")
240 ifneq ($(DOASSERTS),y)
244 ifeq ($(HAVE_SHARED),y)
245 LIBRARY_CACHE:=#-DUSE_CACHE
246 ifeq ($(BUILD_UCLIBC_LDSO),y)
247 LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
248 DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)
251 DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
255 CFLAGS_NOPIC:=$(CFLAGS)
260 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
261 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
262 LIBGCC_DIR:=$(dir $(LIBGCC))
264 ########################################
266 # uClinux shared lib support
269 ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
270 # For the shared version of this, we specify no stack and its library ID
273 export LIBID FLTFLAGS
274 SHARED_TARGET = lib/libc
277 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))