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 $(DEVEL_PREFIX))))))
86 export RUNTIME_PREFIX DEVEL_PREFIX
92 PIEFLAG:=$(call check_gcc,-fPIE,)
93 ifeq ($(strip $(PIEFLAG)),-fPIE)
97 # Some nice CPU specific optimizations
98 ifeq ($(strip $(TARGET_ARCH)),i386)
99 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
100 OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
101 CPU_CFLAGS-$(CONFIG_386)+=-march=i386
102 CPU_CFLAGS-$(CONFIG_486)+=-march=i486
103 CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
104 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
105 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
106 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
107 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
108 CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
109 CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
110 CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
111 CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)
112 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0
113 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
114 CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
115 CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) -malign-functions=0 -malign-jumps=0 -malign-loops=0
116 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
119 ifeq ($(strip $(TARGET_ARCH)),arm)
120 OPTIMIZATION+=-fstrict-aliasing
121 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
122 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
123 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
124 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
125 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
126 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
127 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
128 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
129 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
130 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
131 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
132 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
133 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
134 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
135 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
138 ifeq ($(strip $(TARGET_ARCH)),mips)
139 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
140 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
141 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
142 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
143 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
144 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
147 ifeq ($(strip $(TARGET_ARCH)),sh)
148 OPTIMIZATION+=-fstrict-aliasing
149 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
150 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
151 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
152 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
153 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
154 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
155 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
156 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
159 ifeq ($(strip $(TARGET_ARCH)),sh64)
160 OPTIMIZATION+=-fstrict-aliasing
161 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
162 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
163 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
164 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
165 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
168 ifeq ($(strip $(TARGET_ARCH)),h8300)
169 CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
170 CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
171 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
172 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
175 ifeq ($(strip $(TARGET_ARCH)),cris)
176 CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
177 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
179 PIEFLAG:=$(call check_gcc,-fpie,)
182 ifeq ($(strip $(TARGET_ARCH)),powerpc)
183 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
184 # enough. Therefore use -fpic which will reduce code size and generates
187 PIEFLAG=$(call check_gcc,-fpie,)
190 ifeq ($(strip $(TARGET_ARCH)),frv)
191 CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
192 CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
194 PIEFLAG=$(call check_gcc,-fpie,)
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 $(TARGET_ARCH)),arm)
223 # No longer needed with current toolchains, but leave it here for now.
224 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
225 # LDADD_LIBFLOAT=-lfloat
229 ifneq ($(strip $(UCLIBC_PIE_SUPPORT)),y)
234 ifeq ($(SSP_CFLAGS),)
235 SSP_CFLAGS=$(call check_gcc,-fno-stack-protector-all,)
236 SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
239 # Some nice CFLAGS to work with
240 CFLAGS=$(XWARNINGS) $(OPTIMIZATION) $(XARCH_CFLAGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
241 -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
245 CFLAGS = $(XWARNINGS) -O0 -g3 $(CPU_CFLAGS) -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
246 LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
247 STRIPTOOL:= true -Since_we_are_debugging
249 LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
252 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
253 #CFLAGS+=-iwithprefix include
254 CFLAGS+=$(shell $(CC) -print-search-dirs | sed -ne "s/install: *\(.*\)/-I\1include/gp")
256 ifneq ($(DOASSERTS),y)
260 ifeq ($(HAVE_SHARED),y)
261 ifeq ($(BUILD_UCLIBC_LDSO),y)
262 LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
263 DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)
266 DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
270 CFLAGS_NOPIC:=$(CFLAGS)
275 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
276 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
277 LIBGCC_DIR:=$(dir $(LIBGCC))
280 # common part for libs and binaries
282 # normally used start and end files
283 N_START_FILE = $(LIBGCC_DIR)crtbegin.o
284 N_END_FILE = $(LIBGCC_DIR)crtend.o
286 # shared/pie start and end files
287 S_START_FILE = $(LIBGCC_DIR)crtbeginS.o
288 S_END_FILE = $(LIBGCC_DIR)crtendS.o
291 START_FILE = $(S_START_FILE)
292 END_FILE = $(S_END_FILE)
294 START_FILE = $(N_START_FILE)
295 END_FILE = $(N_END_FILE)
298 START_FILES = $(TOPDIR)lib/crti.o $(START_FILE)
299 END_FILES = $(END_FILE) $(TOPDIR)lib/crtn.o
302 # binaries specific part
304 ifeq ($(UCLIBC_CTOR_DTOR),y)
305 CRT_FILE=$(TOPDIR)lib/crt1.o
307 CRT_FILE=$(TOPDIR)lib/crt0.o
311 S_CRT_FILE=$(TOPDIR)lib/Scrt1.o
313 # arm and ia64 do not use crtbeginT.o for static linking
314 # please add condition for ia64 when it becomes supported
315 ifeq ($(TARGET_arm),y)
316 STATIC_BEGIN_FILE=$(LIBGCC_DIR)crtbegin.o
318 STATIC_BEGIN_FILE=$(LIBGCC_DIR)crtbeginT.o
321 ifeq ($(UCLIBC_PIE_SUPPORT),y)
322 BIN_START_FILES = $(S_CRT_FILE) $(TOPDIR)lib/crti.o $(S_START_FILE)
324 BIN_START_FILES = $(CRT_FILE) $(TOPDIR)lib/crti.o $(START_FILE)
327 # static start and end files
328 STATIC_BIN_START_FILES = $(CRT_FILE) $(TOPDIR)lib/crti.o $(STATIC_BEGIN_FILE)
329 STATIC_BIN_END_FILES = $(N_END_FILE) $(TOPDIR)lib/crtn.o
331 ########################################
333 # uClinux shared lib support
336 ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
337 # For the shared version of this, we specify no stack and its library ID
340 export LIBID FLTFLAGS
341 SHARED_TARGET = lib/libc
344 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))