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
93 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
94 then echo "$(1)"; else echo "$(2)"; fi)
96 if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
97 then echo "-Wa,$(1)"; fi)
99 # Setup some shortcuts so that silent mode is silent like it should be
100 ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS))
101 export MAKE_IS_SILENT=n
105 export MAKE_IS_SILENT=y
110 # Make certain these contain a final "/", but no "//"s.
111 TARGET_ARCH:=$(shell grep -s ^TARGET_ARCH $(TOPDIR)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
112 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
113 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
114 export RUNTIME_PREFIX DEVEL_PREFIX
122 # Some nice CPU specific optimizations
123 ifeq ($(strip $(TARGET_ARCH)),i386)
124 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
125 OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
126 CPU_CFLAGS-$(CONFIG_386)+=-march=i386
127 CPU_CFLAGS-$(CONFIG_486)+=-march=i486
128 CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
129 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
130 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
131 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
132 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
133 CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
134 CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
135 CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
136 CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)
137 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0
138 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
139 CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
140 CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) -malign-functions=0 -malign-jumps=0 -malign-loops=0
141 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
144 ifeq ($(strip $(TARGET_ARCH)),arm)
145 OPTIMIZATION+=-fstrict-aliasing
146 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
147 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
148 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
149 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
150 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
151 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
152 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
153 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
154 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
155 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
156 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
157 CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
158 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
159 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
160 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
161 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
164 ifeq ($(strip $(TARGET_ARCH)),mips)
165 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
166 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
167 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
168 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
169 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
170 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
173 ifeq ($(strip $(TARGET_ARCH)),sh)
174 OPTIMIZATION+=-fstrict-aliasing
175 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
176 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
177 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
178 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
179 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
180 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
181 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
182 ifeq ($(strip $(UCLIBC_HAS_FLOATS)),y)
183 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
184 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
186 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
187 CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
191 ifeq ($(strip $(TARGET_ARCH)),sh64)
192 OPTIMIZATION+=-fstrict-aliasing
193 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
194 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
195 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
196 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
197 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
200 ifeq ($(strip $(TARGET_ARCH)),h8300)
201 CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
202 CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
203 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
204 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
207 ifeq ($(strip $(TARGET_ARCH)),cris)
208 CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
209 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
214 ifeq ($(strip $(TARGET_ARCH)),powerpc)
215 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
216 # enough. Therefore use -fpic which will reduce code size and generates
222 ifeq ($(strip $(TARGET_ARCH)),frv)
223 CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
224 CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
228 # Keep the check_gcc from being needlessly executed
230 ifneq ($(UCLIBC_BUILD_PIE),y)
233 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),)
237 # Use '-Os' optimization if available, else use -O2, allow Config to override
238 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
239 # Use the gcc 3.4 -funit-at-a-time optimization when available
240 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
242 # Add a bunch of extra pedantic annoyingly strict checks
243 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
244 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
245 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
248 ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
249 # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
250 # If -msoft-float isn't supported, we want an error anyway.
251 # Hmm... might need to revisit this for arm since it has 2 different
252 # soft float encodings.
253 CPU_CFLAGS += -msoft-float
254 ifeq ($(strip $(TARGET_ARCH)),arm)
255 # No longer needed with current toolchains, but leave it here for now.
256 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
257 # LDADD_LIBFLOAT=-lfloat
261 SSP_DISABLE_FLAGS:=$(call check_gcc,-fno-stack-protector,)
262 ifeq ($(UCLIBC_BUILD_SSP),y)
263 SSP_CFLAGS:=$(call check_gcc,-fno-stack-protector-all,)
264 SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
265 SSP_ALL_CFLAGS:=$(call check_gcc,-fstack-protector-all,)
267 SSP_CFLAGS:=$(SSP_DISABLE_FLAGS)
270 # Some nice CFLAGS to work with
271 CFLAGS:=$(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
272 -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
273 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc -z defs
278 LDFLAGS := $(LDFLAGS_NOSTRIP)
279 STRIPTOOL:= true -Since_we_are_debugging
281 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
282 LDFLAGS := $(LDFLAGS_NOSTRIP) -s
285 ifeq ($(UCLIBC_BUILD_RELRO),y)
289 ifeq ($(UCLIBC_BUILD_NOW),y)
293 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
294 #CFLAGS+=-iwithprefix include
295 CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
297 ifneq ($(DOASSERTS),y)
301 ifeq ($(HAVE_SHARED),y)
302 ifeq ($(BUILD_UCLIBC_LDSO),y)
303 LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
304 DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)
307 DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
311 CFLAGS_NOPIC:=$(CFLAGS)
316 ifeq ($(DL_FINI_CRT_COMPAT),y)
317 CFLAGS += -D_DL_FINI_CRT_COMPAT
320 # Keep the check_as from being needlessly executed
322 ifndef ASFLAGS_NOEXEC
323 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
324 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
326 export ASFLAGS_NOEXEC :=
329 ASFLAGS += $(ASFLAGS_NOEXEC)
331 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
332 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
333 LIBGCC_DIR:=$(dir $(LIBGCC))
335 ########################################
337 # uClinux shared lib support
340 ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
341 # For the shared version of this, we specify no stack and its library ID
344 export LIBID FLTFLAGS
345 SHARED_TARGET = lib/libc
348 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))