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'.
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 $(DEVEL_PREFIX))))))
86 export RUNTIME_PREFIX DEVEL_PREFIX
93 PIEFLAG:=$(call check_gcc,-fPIE,)
94 ifeq ($(strip $(PIEFLAG)),-fPIE)
95 LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
98 # Some nice CPU specific optimizations
99 ifeq ($(strip $(TARGET_ARCH)),i386)
100 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
101 OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
102 CPU_CFLAGS-$(CONFIG_386)+=-march=i386
103 CPU_CFLAGS-$(CONFIG_486)+=-march=i486
104 CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
105 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
106 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
107 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
108 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
109 CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
110 CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
111 CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
112 CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)
113 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0
114 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
115 CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
116 CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) -malign-functions=0 -malign-jumps=0 -malign-loops=0
117 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
120 ifeq ($(strip $(TARGET_ARCH)),arm)
121 OPTIMIZATION+=-fstrict-aliasing
122 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
123 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
124 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
125 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
126 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
127 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
128 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
129 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
130 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
131 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
132 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
133 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
134 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
135 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
136 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
139 ifeq ($(strip $(TARGET_ARCH)),mips)
140 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
141 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
142 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
143 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
144 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
145 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
148 ifeq ($(strip $(TARGET_ARCH)),sh)
149 OPTIMIZATION+=-fstrict-aliasing
150 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
151 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
152 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
153 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
154 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
155 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
156 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
157 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
160 ifeq ($(strip $(TARGET_ARCH)),sh64)
161 OPTIMIZATION+=-fstrict-aliasing
162 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
163 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
164 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
165 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
166 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
169 ifeq ($(strip $(TARGET_ARCH)),h8300)
170 CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
171 CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
172 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
173 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
176 ifeq ($(strip $(TARGET_ARCH)),cris)
177 CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
178 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
180 PIEFLAG:=$(call check_gcc,-fpie,)
183 ifeq ($(strip $(TARGET_ARCH)),powerpc)
184 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
185 # enough. Therefore use -fpic which will reduce code size and generates
188 PIEFLAG:=$(call check_gcc,-fpie,)
191 ifeq ($(strip $(TARGET_ARCH)),frv)
192 CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
193 CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
195 # Using -pie causes the program to have an interpreter, which is
196 # forbidden, so we must make do with -shared. Unfortunately,
197 # -shared by itself would get us global function descriptors
198 # and calls through PLTs, dynamic resolution of symbols, etc,
199 # which would break as well, but -Bsymbolic comes to the rescue.
200 LDPIEFLAG=-shared -Bsymbolic
204 # Use '-Os' optimization if available, else use -O2, allow Config to override
205 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
206 # Use the gcc 3.4 -funit-at-a-time optimization when available
207 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
210 # Add a bunch of extra pedantic annoyingly strict checks
211 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
212 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
213 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
216 ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
217 # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
218 # If -msoft-float isn't supported, we want an error anyway.
219 # Hmm... might need to revisit this for arm since it has 2 different
220 # soft float encodings.
221 CPU_CFLAGS += -msoft-float
222 ifeq ($(strip $(TARGET_ARCH)),arm)
223 # No longer needed with current toolchains, but leave it here for now.
224 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
225 # LDADD_LIBFLOAT=-lfloat
229 ifneq ($(UCLIBC_BUILD_PIE),y)
234 SSP_DISABLE_FLAGS=$(call check_gcc,-fno-stack-protector,)
235 ifeq ($(UCLIBC_BUILD_SSP),y)
236 SSP_CFLAGS=$(call check_gcc,-fno-stack-protector-all,)
237 SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
238 SSP_ALL_CFLAGS=$(call check_gcc,-fstack-protector-all,)
240 SSP_CFLAGS=$(SSP_DISABLE_FLAGS)
243 # Some nice CFLAGS to work with
244 CFLAGS=$(XWARNINGS) $(OPTIMIZATION) $(XARCH_CFLAGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
245 -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
249 CFLAGS = $(XWARNINGS) -O0 -g3 $(CPU_CFLAGS) $(SSP_CFLAGS) \
250 -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
251 LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
252 STRIPTOOL:= true -Since_we_are_debugging
254 LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
257 ifeq ($(UCLIBC_BUILD_RELRO),y)
261 ifeq ($(UCLIBC_BUILD_NOW),y)
265 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
266 #CFLAGS+=-iwithprefix include
267 CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
269 ifneq ($(DOASSERTS),y)
273 ifeq ($(HAVE_SHARED),y)
274 ifeq ($(BUILD_UCLIBC_LDSO),y)
275 LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
276 DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)
279 DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
283 CFLAGS_NOPIC:=$(CFLAGS)
289 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
290 check_as_noexecstack=$(shell if $(LD) --help | grep -q "z noexecstack"; then echo "-Wa,--noexecstack"; fi)
291 ASFLAGS += $(check_as_noexecstack)
294 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
295 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
296 LIBGCC_DIR:=$(dir $(LIBGCC))
298 ########################################
300 # uClinux shared lib support
303 ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
304 # For the shared version of this, we specify no stack and its library ID
307 export LIBID FLTFLAGS
308 SHARED_TARGET = lib/libc
311 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))