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 STRIPTOOL = $(CROSS)strip
52 STRIP_FLAGS ?= -x -R .note -R .comment
54 # Select the compiler needed to build binaries for your development system
56 HOSTCFLAGS = -O2 -Wall
59 #---------------------------------------------------------
60 # Nothing beyond this point should ever be touched by mere
61 # mortals. Unless you hang out with the gods, you should
62 # probably leave all this stuff alone.
66 VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
67 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
69 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
71 SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
72 UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
73 NONSHARED_LIBNAME:=uclibc_nonshared.a
75 # Make sure DESTDIR and PREFIX can be used to install
76 # PREFIX is a uClibcism while DESTDIR is a common GNUism
81 # Pull in the user's uClibc configuration
82 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
83 -include $(TOPDIR).config
87 CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
90 # A nifty macro to make testing gcc features easier
92 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
93 then echo "$(1)"; else echo "$(2)"; fi)
95 if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
96 then echo "-Wa,$(1)"; fi)
98 # Setup some shortcuts so that silent mode is silent like it should be
99 ifeq ($(findstring s,$(MAKEFLAGS)),)
100 export MAKE_IS_SILENT=n
104 export MAKE_IS_SILENT=y
109 # Make certain these contain a final "/", but no "//"s.
110 TARGET_ARCH:=$(shell grep -s ^TARGET_ARCH $(TOPDIR)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
111 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
112 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
113 KERNEL_SOURCE:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_SOURCE))))))
114 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_SOURCE
122 # Some nice CPU specific optimizations
123 ifeq ($(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,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
137 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
138 CPU_CFLAGS-$(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) $(call check_gcc,-falign-functions=0,-malign-functions=0)
141 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
144 ifeq ($(strip $(TARGET_ARCH)),sparc)
145 CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
146 CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
147 CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
148 CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
151 ifeq ($(strip $(TARGET_ARCH)),arm)
152 OPTIMIZATION+=-fstrict-aliasing
153 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
154 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
155 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
156 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
157 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
158 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
159 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
160 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
161 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
162 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
163 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5
164 CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
165 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
166 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
167 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
168 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
171 ifeq ($(strip $(TARGET_ARCH)),mips)
172 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
173 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
174 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
175 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
176 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
177 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
180 ifeq ($(strip $(TARGET_ARCH)),sh)
181 OPTIMIZATION+=-fstrict-aliasing
182 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
183 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
184 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
185 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
186 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
187 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
188 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
189 ifeq ($(UCLIBC_HAS_FLOATS),y)
190 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
191 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
193 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
194 CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
198 ifeq ($(strip $(TARGET_ARCH)),sh64)
199 OPTIMIZATION+=-fstrict-aliasing
200 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
201 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
202 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
203 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
204 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
207 ifeq ($(strip $(TARGET_ARCH)),h8300)
208 CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
209 CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
210 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
211 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
214 ifeq ($(strip $(TARGET_ARCH)),cris)
215 CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
216 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
221 ifeq ($(strip $(TARGET_ARCH)),powerpc)
222 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
223 # enough. Therefore use -fpic which will reduce code size and generates
229 ifeq ($(strip $(TARGET_ARCH)),frv)
230 CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
231 CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
232 # Using -pie causes the program to have an interpreter, which is
233 # forbidden, so we must make do with -shared. Unfortunately,
234 # -shared by itself would get us global function descriptors
235 # and calls through PLTs, dynamic resolution of symbols, etc,
236 # which would break as well, but -Bsymbolic comes to the rescue.
237 export LDPIEFLAG:=-shared -Bsymbolic
241 # Keep the check_gcc from being needlessly executed
243 ifneq ($(UCLIBC_BUILD_PIE),y)
246 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
249 # We need to keep track of both the CC PIE flag (above) as
250 # well as the LD PIE flag (below) because we can't rely on
251 # gcc passing -pie if we used -fPIE
253 ifneq ($(UCLIBC_BUILD_PIE),y)
256 export LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
260 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
262 ifneq ($(UCLIBC_HAS_SSP),y)
265 export ASNEEDED:=$(shell (LD_TMP=$(mktemp LD_XXXXXX) ; echo "GROUP ( AS_NEEDED ( /usr/lib/libc.so ) )" > $LD_TMP && if $(LD) -T $LD_TMP -o /dev/null > /dev/null 2>&1; then echo "AS_NEEDED ( $(UCLIBC_LDSO) )"; else echo "$(UCLIBC_LDSO)"; fi; rm -f $LD_TMP ) )
269 # Use '-Os' optimization if available, else use -O2, allow Config to override
270 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
271 # Use the gcc 3.4 -funit-at-a-time optimization when available
272 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
274 # Add a bunch of extra pedantic annoyingly strict checks
275 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
276 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
277 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
280 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
281 # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
282 # If -msoft-float isn't supported, we want an error anyway.
283 # Hmm... might need to revisit this for arm since it has 2 different
284 # soft float encodings.
285 CPU_CFLAGS += -msoft-float
286 ifeq ($(strip $(TARGET_ARCH)),arm)
287 # No longer needed with current toolchains, but leave it here for now.
288 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
289 # LDADD_LIBFLOAT=-lfloat
293 SSP_DISABLE_FLAGS?=$(call check_gcc,-fno-stack-protector,)
294 ifeq ($(UCLIBC_BUILD_SSP),y)
295 SSP_CFLAGS:=$(call check_gcc,-fno-stack-protector-all,)
296 SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
297 SSP_ALL_CFLAGS?=$(call check_gcc,-fstack-protector-all,)
299 SSP_CFLAGS:=$(SSP_DISABLE_FLAGS)
302 # Some nice CFLAGS to work with
303 CFLAGS:=$(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
304 -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
305 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc -z defs
310 LDFLAGS := $(LDFLAGS_NOSTRIP)
311 STRIPTOOL:= true -Since_we_are_debugging
313 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
314 LDFLAGS := $(LDFLAGS_NOSTRIP) -s
318 # we try to compile all sources at once into an object (IMA), but
319 # gcc-3.3.x does not support it
320 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
321 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
322 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
323 GCC_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
327 CFLAGS+=$(call check_gcc,--combine,)
333 ifeq ($(UCLIBC_HAS_THREADS),y)
334 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
337 PTNAME := linuxthreads
339 PTDIR := $(TOPDIR)libpthread/$(PTNAME)
340 # set up system dependencies include dirs (NOTE: order matters!)
341 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
342 PTINC:= -I$(PTDIR)/compat \
343 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
344 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
345 -I$(PTDIR)/sysdeps/unix/sysv/linux \
346 -I$(PTDIR)/sysdeps/pthread \
347 -I$(PTDIR)/sysdeps/pthread/bits \
348 -I$(PTDIR)/sysdeps/generic \
349 -include $(PTDIR)/compat/libc-symbols.h
351 # Test for TLS if NPTL support was selected.
353 GCC_HAS_TLS=$(shell \
354 echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
355 ifneq ($(GCC_HAS_TLS),)
358 @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
359 @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
360 @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
361 @echo "#### about this problem.";
363 @echo "#### Exiting...";
368 PTINC:= -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
369 -I$(PTDIR)/sysdeps/pthread
374 ifeq ($(UCLIBC_BUILD_RELRO),y)
378 ifeq ($(UCLIBC_BUILD_NOW),y)
382 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
383 #CFLAGS+=-iwithprefix include
384 CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
386 ifneq ($(DOASSERTS),y)
390 # Keep the check_as from being needlessly executed
391 ifndef ASFLAGS_NOEXEC
392 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
393 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
395 export ASFLAGS_NOEXEC :=
398 ASFLAGS = $(ASFLAGS_NOEXEC)
400 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
401 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
402 LIBGCC_DIR:=$(dir $(LIBGCC))
404 ########################################
406 # uClinux shared lib support
409 ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
410 # For the shared version of this, we specify no stack and its library ID
413 export LIBID FLTFLAGS
414 SHARED_TARGET = lib/libc
417 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))