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
23 # Makefiles. All normal configuration options live in the
24 # file named ".config". Don't mess with this file unless
25 # you know what you are doing.
28 #-----------------------------------------------------------
29 # If you are running a cross compiler, you will want to set
30 # 'CROSS' to something more interesting ... Target
31 # architecture is determined by asking the CC compiler what
32 # arch it compiles things for, so unless your compiler is
33 # broken, you should not need to specify TARGET_ARCH.
35 # Most people will set this stuff on the command line, i.e.
36 # make CROSS=arm-linux-
37 # will build uClibc for 'arm'.
46 RANLIB = $(CROSS)ranlib
47 STRIPTOOL = $(CROSS)strip
53 # Select the compiler needed to build binaries for your development system
55 HOSTCFLAGS = -O2 -Wall
58 #---------------------------------------------------------
59 # Nothing beyond this point should ever be touched by mere
60 # mortals. Unless you hang out with the gods, you should
61 # probably leave all this stuff alone.
65 VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
66 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
68 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
70 SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
71 SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
72 UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
74 LIBC:=$(TOPDIR)libc/$(LIBNAME)
76 # Make sure DESTDIR and PREFIX can be used to install
77 # PREFIX is a uClibcism while DESTDIR is a common GNUism
82 # Pull in the user's uClibc configuration
83 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
84 -include $(TOPDIR).config
88 CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
91 # A nifty macro to make testing gcc features easier
92 check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
93 then echo "$(1)"; else echo "$(2)"; fi)
95 # Make certain these contain a final "/", but no "//"s.
96 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
97 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
98 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
99 export RUNTIME_PREFIX DEVEL_PREFIX
106 PIEFLAG:=$(call check_gcc,-fPIE,)
107 ifeq ($(strip $(PIEFLAG)),-fPIE)
108 LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
111 # Some nice CPU specific optimizations
112 ifeq ($(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_ELAN)+=-march=i486
118 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
119 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
120 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
121 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-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)+=$(call check_gcc,-march=c3,-march=i486) -malign-functions=0 -malign-jumps=0 -malign-loops=0
130 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
133 ifeq ($(strip $(TARGET_ARCH)),arm)
134 OPTIMIZATION+=-fstrict-aliasing
135 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
136 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
137 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
138 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
139 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
140 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
141 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
142 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
143 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
144 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
145 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
146 CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
147 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
148 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
149 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
150 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
153 ifeq ($(strip $(TARGET_ARCH)),mips)
154 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
155 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
156 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
157 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
158 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
159 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
162 ifeq ($(strip $(TARGET_ARCH)),sh)
163 OPTIMIZATION+=-fstrict-aliasing
164 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
165 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
166 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
167 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
168 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
169 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
170 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
171 ifeq ($(strip $(UCLIBC_HAS_FLOATS)),y)
172 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
173 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
175 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
176 CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
180 ifeq ($(strip $(TARGET_ARCH)),sh64)
181 OPTIMIZATION+=-fstrict-aliasing
182 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
183 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
184 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
185 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
186 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
189 ifeq ($(strip $(TARGET_ARCH)),h8300)
190 CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
191 CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
192 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
193 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
196 ifeq ($(strip $(TARGET_ARCH)),cris)
197 CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
198 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
200 PIEFLAG:=$(call check_gcc,-fpie,)
203 ifeq ($(strip $(TARGET_ARCH)),powerpc)
204 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
205 # enough. Therefore use -fpic which will reduce code size and generates
208 PIEFLAG:=$(call check_gcc,-fpie,)
211 ifeq ($(strip $(TARGET_ARCH)),frv)
212 CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
213 CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
215 # Using -pie causes the program to have an interpreter, which is
216 # forbidden, so we must make do with -shared. Unfortunately,
217 # -shared by itself would get us global function descriptors
218 # and calls through PLTs, dynamic resolution of symbols, etc,
219 # which would break as well, but -Bsymbolic comes to the rescue.
220 LDPIEFLAG=-shared -Bsymbolic
224 # Use '-Os' optimization if available, else use -O2, allow Config to override
225 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
226 # Use the gcc 3.4 -funit-at-a-time optimization when available
227 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
230 # Add a bunch of extra pedantic annoyingly strict checks
231 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
232 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
233 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
236 ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
237 # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
238 # If -msoft-float isn't supported, we want an error anyway.
239 # Hmm... might need to revisit this for arm since it has 2 different
240 # soft float encodings.
241 CPU_CFLAGS += -msoft-float
242 ifeq ($(strip $(TARGET_ARCH)),arm)
243 # No longer needed with current toolchains, but leave it here for now.
244 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
245 # LDADD_LIBFLOAT=-lfloat
249 ifneq ($(UCLIBC_BUILD_PIE),y)
254 SSP_DISABLE_FLAGS=$(call check_gcc,-fno-stack-protector,)
255 ifeq ($(UCLIBC_BUILD_SSP),y)
256 SSP_CFLAGS=$(call check_gcc,-fno-stack-protector-all,)
257 SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
258 SSP_ALL_CFLAGS=$(call check_gcc,-fstack-protector-all,)
260 SSP_CFLAGS=$(SSP_DISABLE_FLAGS)
263 # Some nice CFLAGS to work with
264 CFLAGS=$(XWARNINGS) $(OPTIMIZATION) $(XARCH_CFLAGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
265 -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
269 CFLAGS = $(XWARNINGS) -O0 -g3 $(CPU_CFLAGS) $(SSP_CFLAGS) \
270 -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
271 LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
272 STRIPTOOL:= true -Since_we_are_debugging
274 LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
277 ifeq ($(UCLIBC_BUILD_RELRO),y)
281 ifeq ($(UCLIBC_BUILD_NOW),y)
285 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
286 #CFLAGS+=-iwithprefix include
287 CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
289 ifneq ($(DOASSERTS),y)
293 ifeq ($(HAVE_SHARED),y)
294 ifeq ($(BUILD_UCLIBC_LDSO),y)
295 LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
296 DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)
299 DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
303 CFLAGS_NOPIC:=$(CFLAGS)
309 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
310 check_as_noexecstack=$(shell if $(LD) --help | grep -q "z noexecstack"; then echo "-Wa,--noexecstack"; fi)
311 ASFLAGS += $(check_as_noexecstack)
314 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
315 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
316 LIBGCC_DIR:=$(dir $(LIBGCC))
318 ########################################
320 # uClinux shared lib support
323 ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
324 # For the shared version of this, we specify no stack and its library ID
327 export LIBID FLTFLAGS
328 SHARED_TARGET = lib/libc
331 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))