1 # Rules.make for uClibc
3 # Copyright (C) 2000 by Lineo, inc.
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 # Select the compiler needed to build binaries for your development system
54 HOSTCFLAGS = -O2 -Wall
57 #---------------------------------------------------------
58 # Nothing beyond this point should ever be touched by mere
59 # mortals. Unless you hang out with the gods, you should
60 # probably leave all this stuff alone.
64 VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
65 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
67 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
69 SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
70 UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
71 NONSHARED_LIBNAME:=uclibc_nonshared.a
73 # Make sure DESTDIR and PREFIX can be used to install
74 # PREFIX is a uClibcism while DESTDIR is a common GNUism
79 # Pull in the user's uClibc configuration
80 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
81 -include $(TOPDIR).config
85 CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
88 # A nifty macro to make testing gcc features easier
90 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
91 then echo "$(1)"; else echo "$(2)"; fi)
93 if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
94 then echo "-Wa,$(1)"; fi)
96 # Setup some shortcuts so that silent mode is silent like it should be
97 ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS))
98 export MAKE_IS_SILENT=n
102 export MAKE_IS_SILENT=y
107 # Make certain these contain a final "/", but no "//"s.
108 TARGET_ARCH:=$(shell grep -s ^TARGET_ARCH $(TOPDIR)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
109 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
110 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
111 KERNEL_SOURCE:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_SOURCE))))))
112 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_SOURCE
120 # Some nice CPU specific optimizations
121 ifeq ($(strip $(TARGET_ARCH)),i386)
122 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
123 OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
124 CPU_CFLAGS-$(CONFIG_386)+=-march=i386
125 CPU_CFLAGS-$(CONFIG_486)+=-march=i486
126 CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
127 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
128 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
129 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
130 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
131 CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
132 CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
133 CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
134 CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
135 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
136 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
137 CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
138 CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
139 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
142 ifeq ($(strip $(TARGET_ARCH)),sparc)
143 CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
144 CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
145 CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
146 CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
149 ifeq ($(strip $(TARGET_ARCH)),arm)
150 OPTIMIZATION+=-fstrict-aliasing
151 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
152 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
153 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
154 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
155 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
156 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
157 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
158 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
159 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
160 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
161 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5
162 CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
163 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
164 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
165 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
166 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
169 ifeq ($(strip $(TARGET_ARCH)),mips)
170 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
171 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
172 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
173 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
174 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
175 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
178 ifeq ($(strip $(TARGET_ARCH)),sh)
179 OPTIMIZATION+=-fstrict-aliasing
180 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
181 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
182 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
183 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
184 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
185 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
186 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
187 ifeq ($(strip $(UCLIBC_HAS_FLOATS)),y)
188 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
189 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
191 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
192 CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
196 ifeq ($(strip $(TARGET_ARCH)),sh64)
197 OPTIMIZATION+=-fstrict-aliasing
198 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
199 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
200 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
201 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
202 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
205 ifeq ($(strip $(TARGET_ARCH)),h8300)
206 CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
207 CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
208 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
209 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
212 ifeq ($(strip $(TARGET_ARCH)),cris)
213 CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
214 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
219 ifeq ($(strip $(TARGET_ARCH)),powerpc)
220 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
221 # enough. Therefore use -fpic which will reduce code size and generates
227 ifeq ($(strip $(TARGET_ARCH)),frv)
228 CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
229 CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
230 # Using -pie causes the program to have an interpreter, which is
231 # forbidden, so we must make do with -shared. Unfortunately,
232 # -shared by itself would get us global function descriptors
233 # and calls through PLTs, dynamic resolution of symbols, etc,
234 # which would break as well, but -Bsymbolic comes to the rescue.
235 export LDPIEFLAG:=-shared -Bsymbolic
239 # Keep the check_gcc from being needlessly executed
241 ifneq ($(UCLIBC_BUILD_PIE),y)
244 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
247 # We need to keep track of both the CC PIE flag (above) as
248 # well as the LD PIE flag (below) because we can't rely on
249 # gcc passing -pie if we used -fPIE
251 ifneq ($(UCLIBC_BUILD_PIE),y)
254 export LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
258 # Use '-Os' optimization if available, else use -O2, allow Config to override
259 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
260 # Use the gcc 3.4 -funit-at-a-time optimization when available
261 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
263 # Add a bunch of extra pedantic annoyingly strict checks
264 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
265 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
266 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
269 ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
270 # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
271 # If -msoft-float isn't supported, we want an error anyway.
272 # Hmm... might need to revisit this for arm since it has 2 different
273 # soft float encodings.
274 CPU_CFLAGS += -msoft-float
275 ifeq ($(strip $(TARGET_ARCH)),arm)
276 # No longer needed with current toolchains, but leave it here for now.
277 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
278 # LDADD_LIBFLOAT=-lfloat
282 SSP_DISABLE_FLAGS:=$(call check_gcc,-fno-stack-protector,)
283 ifeq ($(UCLIBC_BUILD_SSP),y)
284 SSP_CFLAGS:=$(call check_gcc,-fno-stack-protector-all,)
285 SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
286 SSP_ALL_CFLAGS:=$(call check_gcc,-fstack-protector-all,)
288 SSP_CFLAGS:=$(SSP_DISABLE_FLAGS)
291 # Some nice CFLAGS to work with
292 CFLAGS:=$(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
293 -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
294 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc -z defs
299 LDFLAGS := $(LDFLAGS_NOSTRIP)
300 STRIPTOOL:= true -Since_we_are_debugging
302 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
303 LDFLAGS := $(LDFLAGS_NOSTRIP) -s
306 ifeq ($(UCLIBC_HAS_THREADS),y)
307 ifeq ($(strip $(UCLIBC_HAS_THREADS_NATIVE)),y)
310 PTNAME := linuxthreads
312 PTDIR := $(TOPDIR)libpthread/$(PTNAME)
313 # set up system dependencies include dirs (NOTE: order matters!)
314 ifeq ($(strip $(UCLIBC_HAS_THREADS_NATIVE)),y)
315 PTINC := -I$(PTDIR)/compat \
316 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
317 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
318 -I$(PTDIR)/sysdeps/unix/sysv/linux \
319 -I$(PTDIR)/sysdeps/pthread \
320 -I$(PTDIR)/sysdeps/pthread/bits \
321 -I$(PTDIR)/sysdeps/generic \
322 -include $(PTDIR)/compat/libc-symbols.h
324 # Test for TLS if NPTL support was selected.
326 GCC_HAS_TLS=$(shell \
327 echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
328 ifneq ($(GCC_HAS_TLS),)
331 @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
332 @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
333 @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
334 @echo "#### about this problem.";
336 @echo "#### Exiting...";
341 # psm: the next 2 are probably incorrect, the generic header will
342 # win over the arch specific one
343 PTINC := -I$(PTDIR)/sysdeps/pthread \
344 -I$(PTDIR)/sysdeps/$(TARGET_ARCH)
348 ifeq ($(UCLIBC_BUILD_RELRO),y)
352 ifeq ($(UCLIBC_BUILD_NOW),y)
356 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
357 #CFLAGS+=-iwithprefix include
358 CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
360 ifneq ($(DOASSERTS),y)
364 CFLAGS_NOPIC:=$(CFLAGS)
369 # Keep the check_as from being needlessly executed
371 ifndef ASFLAGS_NOEXEC
372 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
373 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
375 export ASFLAGS_NOEXEC :=
378 ASFLAGS += $(ASFLAGS_NOEXEC)
380 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
381 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
382 LIBGCC_DIR:=$(dir $(LIBGCC))
384 ########################################
386 # uClinux shared lib support
389 ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
390 # For the shared version of this, we specify no stack and its library ID
393 export LIBID FLTFLAGS
394 SHARED_TARGET = lib/libc
397 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))