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 "$(2)"; fi)
94 check_as=$(shell if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
95 then echo "-Wa,$(1)"; fi)
97 # Make certain these contain a final "/", but no "//"s.
98 TARGET_ARCH:=$(shell grep -s ^TARGET_ARCH $(TOPDIR)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
99 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
100 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
101 export RUNTIME_PREFIX DEVEL_PREFIX
108 PIEFLAG:=$(call check_gcc,-fPIE,)
109 ifeq ($(strip $(PIEFLAG)),-fPIE)
110 LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
113 # Some nice CPU specific optimizations
114 ifeq ($(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_ELAN)+=-march=i486
120 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
121 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
122 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
123 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
124 CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
125 CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
126 CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
127 CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)
128 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0
129 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
130 CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
131 CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) -malign-functions=0 -malign-jumps=0 -malign-loops=0
132 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
135 ifeq ($(strip $(TARGET_ARCH)),arm)
136 OPTIMIZATION+=-fstrict-aliasing
137 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
138 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
139 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
140 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
141 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
142 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
143 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
144 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
145 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
146 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
147 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
148 CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
149 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
150 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
151 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
152 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
155 ifeq ($(strip $(TARGET_ARCH)),mips)
156 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
157 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
158 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
159 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
160 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
161 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
164 ifeq ($(strip $(TARGET_ARCH)),sh)
165 OPTIMIZATION+=-fstrict-aliasing
166 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
167 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
168 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
169 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
170 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
171 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
172 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
173 ifeq ($(strip $(UCLIBC_HAS_FLOATS)),y)
174 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
175 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
177 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
178 CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
182 ifeq ($(strip $(TARGET_ARCH)),sh64)
183 OPTIMIZATION+=-fstrict-aliasing
184 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
185 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
186 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
187 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
188 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
191 ifeq ($(strip $(TARGET_ARCH)),h8300)
192 CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
193 CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
194 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
195 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
198 ifeq ($(strip $(TARGET_ARCH)),cris)
199 CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
200 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
202 PIEFLAG:=$(call check_gcc,-fpie,)
205 ifeq ($(strip $(TARGET_ARCH)),powerpc)
206 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
207 # enough. Therefore use -fpic which will reduce code size and generates
210 PIEFLAG:=$(call check_gcc,-fpie,)
213 ifeq ($(strip $(TARGET_ARCH)),frv)
214 CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
215 CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
216 # Using -pie causes the program to have an interpreter, which is
217 # forbidden, so we must make do with -shared. Unfortunately,
218 # -shared by itself would get us global function descriptors
219 # and calls through PLTs, dynamic resolution of symbols, etc,
220 # which would break as well, but -Bsymbolic comes to the rescue.
221 LDPIEFLAG=-shared -Bsymbolic
225 # Use '-Os' optimization if available, else use -O2, allow Config to override
226 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
227 # Use the gcc 3.4 -funit-at-a-time optimization when available
228 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
231 # Add a bunch of extra pedantic annoyingly strict checks
232 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
233 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
234 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
237 ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
238 # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
239 # If -msoft-float isn't supported, we want an error anyway.
240 # Hmm... might need to revisit this for arm since it has 2 different
241 # soft float encodings.
242 CPU_CFLAGS += -msoft-float
243 ifeq ($(strip $(TARGET_ARCH)),arm)
244 # No longer needed with current toolchains, but leave it here for now.
245 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
246 # LDADD_LIBFLOAT=-lfloat
250 ifneq ($(UCLIBC_BUILD_PIE),y)
255 SSP_DISABLE_FLAGS:=$(call check_gcc,-fno-stack-protector,)
256 ifeq ($(UCLIBC_BUILD_SSP),y)
257 SSP_CFLAGS:=$(call check_gcc,-fno-stack-protector-all,)
258 SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
259 SSP_ALL_CFLAGS:=$(call check_gcc,-fstack-protector-all,)
261 SSP_CFLAGS:=$(SSP_DISABLE_FLAGS)
264 # Some nice CFLAGS to work with
265 CFLAGS:=$(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
266 -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
267 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc -z defs
272 LDFLAGS := $(LDFLAGS_NOSTRIP)
273 STRIPTOOL:= true -Since_we_are_debugging
275 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
276 LDFLAGS := $(LDFLAGS_NOSTRIP) -s
279 ifeq ($(UCLIBC_BUILD_RELRO),y)
283 ifeq ($(UCLIBC_BUILD_NOW),y)
287 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
288 #CFLAGS+=-iwithprefix include
289 CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
291 ifneq ($(DOASSERTS),y)
295 ifeq ($(HAVE_SHARED),y)
296 ifeq ($(BUILD_UCLIBC_LDSO),y)
297 LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
298 DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)
301 DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
305 CFLAGS_NOPIC:=$(CFLAGS)
310 ifeq ($(DL_FINI_CRT_COMPAT),y)
311 CFLAGS += -D_DL_FINI_CRT_COMPAT
315 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
316 ASFLAGS += $(call check_as,--noexecstack)
319 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
320 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
321 LIBGCC_DIR:=$(dir $(LIBGCC))
323 ########################################
325 # uClinux shared lib support
328 ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
329 # For the shared version of this, we specify no stack and its library ID
332 export LIBID FLTFLAGS
333 SHARED_TARGET = lib/libc
336 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))