1 # Rules.make for uClibc
3 # Copyright (C) 2000 by Lineo, inc.
4 # Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
6 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
9 #-----------------------------------------------------------
10 # This file contains rules which are shared between multiple
11 # Makefiles. All normal configuration options live in the
12 # file named ".config". Don't mess with this file unless
13 # you know what you are doing.
16 #-----------------------------------------------------------
17 # If you are running a cross compiler, you will want to set
18 # 'CROSS' to something more interesting ... Target
19 # architecture is determined by asking the CC compiler what
20 # arch it compiles things for, so unless your compiler is
21 # broken, you should not need to specify TARGET_ARCH.
23 # Most people will set this stuff on the command line, i.e.
24 # make CROSS=arm-linux-
25 # will build uClibc for 'arm'.
34 STRIPTOOL = $(CROSS)strip
41 STRIP_FLAGS ?= -x -R .note -R .comment
43 # Select the compiler needed to build binaries for your development system
45 BUILD_CFLAGS = -O2 -Wall
48 #---------------------------------------------------------
49 # Nothing beyond this point should ever be touched by mere
50 # mortals. Unless you hang out with the gods, you should
51 # probably leave all this stuff alone.
53 # Pull in the user's uClibc configuration
54 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
55 -include $(top_builddir).config
58 # Make certain these contain a final "/", but no "//"s.
59 TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
60 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
61 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
62 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
63 KERNEL_SOURCE:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_SOURCE))))))
64 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_SOURCE
67 # Now config hard core
71 VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
72 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
74 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
77 SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
78 UCLIBC_LDSO_NAME := ld-uClibc
79 ifeq ($(TARGET_ARCH),x86_64)
80 UCLIBC_LDSO_NAME := ld64-uClibc
82 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
83 NONSHARED_LIBNAME := uclibc_nonshared.a
84 libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
85 interp := $(top_builddir)lib/interp.os
86 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
87 headers_dep := $(top_builddir)include/bits/sysnum.h
88 sub_headers := $(headers_dep)
90 #LIBS :=$(interp) -L$(top_builddir)lib -lc
91 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
93 # Make sure DESTDIR and PREFIX can be used to install
94 # PREFIX is a uClibcism while DESTDIR is a common GNUism
99 ifneq ($(HAVE_SHARED),y)
106 CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
109 # A nifty macro to make testing gcc features easier
111 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
112 then echo "$(1)"; else echo "$(2)"; fi)
114 if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
115 then echo "-Wa,$(1)"; fi)
123 # Some nice CPU specific optimizations
124 ifeq ($(TARGET_ARCH),i386)
125 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
126 OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
127 CPU_CFLAGS-$(CONFIG_386)+=-march=i386
128 CPU_CFLAGS-$(CONFIG_486)+=-march=i486
129 CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
130 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
131 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
132 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
133 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
134 CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
135 CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
136 CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
137 CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
138 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
139 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
140 CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
141 CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
142 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
145 ifeq ($(TARGET_ARCH),sparc)
146 CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
147 CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
148 CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
149 CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
152 ifeq ($(TARGET_ARCH),arm)
153 OPTIMIZATION+=-fstrict-aliasing
154 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
155 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
156 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
157 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
158 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
159 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
160 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
161 CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4
162 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
163 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
164 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
165 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5
166 CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
167 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
168 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
169 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
170 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
173 ifeq ($(TARGET_ARCH),mips)
174 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
175 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
176 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
177 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
178 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
179 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
180 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
181 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
184 ifeq ($(TARGET_ARCH),nios)
189 ifeq ($(TARGET_ARCH),sh)
190 OPTIMIZATION+=-fstrict-aliasing
191 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
192 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
193 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
194 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
195 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
196 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
197 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
198 ifeq ($(UCLIBC_HAS_FLOATS),y)
199 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
200 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
202 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
203 CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
207 ifeq ($(TARGET_ARCH),sh64)
208 OPTIMIZATION+=-fstrict-aliasing
209 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
210 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
211 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
212 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
213 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
216 ifeq ($(TARGET_ARCH),h8300)
217 CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
218 CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
219 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
220 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
223 ifeq ($(TARGET_ARCH),cris)
224 CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
225 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
230 ifeq ($(TARGET_ARCH),powerpc)
231 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
232 # enough. Therefore use -fpic which will reduce code size and generates
238 ifeq ($(TARGET_ARCH),bfin)
239 # This should also work, but why bother ? ;)
240 #PICFLAG:=-fPIC -mid-shared-library
244 ifeq ($(TARGET_ARCH),frv)
245 CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
246 CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
247 # Using -pie causes the program to have an interpreter, which is
248 # forbidden, so we must make do with -shared. Unfortunately,
249 # -shared by itself would get us global function descriptors
250 # and calls through PLTs, dynamic resolution of symbols, etc,
251 # which would break as well, but -Bsymbolic comes to the rescue.
252 export LDPIEFLAG:=-shared -Bsymbolic
256 # Keep the check_gcc from being needlessly executed
258 ifneq ($(UCLIBC_BUILD_PIE),y)
261 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
264 # We need to keep track of both the CC PIE flag (above) as
265 # well as the LD PIE flag (below) because we can't rely on
266 # gcc passing -pie if we used -fPIE
268 ifneq ($(UCLIBC_BUILD_PIE),y)
271 export LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
275 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
277 ifneq ($(UCLIBC_HAS_SSP),y)
280 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 $LD_TMP ) )
284 # Use '-Os' optimization if available, else use -O2, allow Config to override
285 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
286 # Use the gcc 3.4 -funit-at-a-time optimization when available
287 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
289 # Add a bunch of extra pedantic annoyingly strict checks
290 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
291 ifeq ($(EXTRA_WARNINGS),y)
292 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
293 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
294 # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
295 #XWARNINGS+=-Wdeclaration-after-statement
297 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
298 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
300 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
301 ifeq ($(UCLIBC_BUILD_SSP),y)
302 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
303 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
304 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
306 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
309 # Some nice CFLAGS to work with
310 CFLAGS := -include $(top_builddir)include/libc-symbols.h \
311 $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
312 -fno-builtin -nostdinc -I$(top_builddir)include -I.
315 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
316 # If -msoft-float isn't supported, we want an error anyway.
317 # Hmm... might need to revisit this for arm since it has 2 different
318 # soft float encodings.
319 ifneq ($(TARGET_ARCH),nios)
320 ifneq ($(TARGET_ARCH),nios2)
321 CFLAGS += -msoft-float
324 ifeq ($(TARGET_ARCH),arm)
325 # No longer needed with current toolchains, but leave it here for now.
326 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
327 # LDADD_LIBFLOAT=-lfloat
331 # Make sure "char" behavior is the same everywhere
332 CFLAGS += -fsigned-char
334 # We need this to be checked within libc-symbols.h
335 ifneq ($(HAVE_SHARED),y)
339 # only i386 is known to work if compile.S gets -D__ASSEMBLER__
340 #CFLAGS += $(call check_gcc,-std=c99,)
342 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
344 ifeq ($(UCLIBC_BUILD_RELRO),y)
345 LDFLAGS_NOSTRIP+=-z relro
348 ifeq ($(UCLIBC_BUILD_NOW),y)
349 LDFLAGS_NOSTRIP+=-z now
352 LDFLAGS:=$(LDFLAGS_NOSTRIP) -z defs
356 STRIPTOOL:= true -Since_we_are_debugging
358 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
363 # we try to compile all sources at once into an object (IMA), but
364 # gcc-3.3.x does not support it
365 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
366 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
367 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
368 GCC_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
372 CFLAGS+=$(call check_gcc,--combine,)
378 ifeq ($(UCLIBC_HAS_THREADS),y)
379 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
382 ifeq ($(LINUXTHREADS_OLD),y)
383 PTNAME := linuxthreads.old
385 PTNAME := linuxthreads
388 PTDIR := $(top_builddir)libpthread/$(PTNAME)
389 # set up system dependencies include dirs (NOTE: order matters!)
390 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
393 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
394 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
395 -I$(PTDIR)/sysdeps/unix/sysv/linux \
396 -I$(PTDIR)/sysdeps/pthread \
397 -I$(PTDIR)/sysdeps/pthread/bits \
398 -I$(PTDIR)/sysdeps/generic \
399 -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
400 -I$(top_srcdir)ldso/include \
401 -include $(PTDIR)/compat/libc-symbols.h
403 # Test for TLS if NPTL support was selected.
405 GCC_HAS_TLS=$(shell \
406 echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
407 ifneq ($(GCC_HAS_TLS),)
410 @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
411 @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
412 @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
413 @echo "#### about this problem.";
415 @echo "#### Exiting...";
421 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
422 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
423 -I$(PTDIR)/sysdeps/unix/sysv/linux \
424 -I$(PTDIR)/sysdeps/pthread \
426 -I$(top_builddir)libpthread
434 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
435 #CFLAGS+=-iwithprefix include
436 CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
438 ifneq ($(DOASSERTS),y)
442 # moved from ldso/{ldso,libdl}
443 # BEWARE!!! At least mips* will die if -O0 is used!!!
444 ifeq ($(TARGET_ARCH),mips)
445 CFLAGS:=$(CFLAGS:-O0=-O1)
448 # Keep the check_as from being needlessly executed
449 ifndef ASFLAGS_NOEXEC
450 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
451 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
453 export ASFLAGS_NOEXEC :=
456 ASFLAGS = $(ASFLAGS_NOEXEC)
458 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
459 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
460 LIBGCC_DIR:=$(dir $(LIBGCC))
462 # moved from libpthread/linuxthreads
463 ifeq ($(UCLIBC_CTOR_DTOR),y)
464 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
465 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
468 ########################################
470 # uClinux shared lib support
473 ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
474 # For the shared version of this, we specify no stack and its library ID
477 export LIBID FLTFLAGS
478 SHARED_TARGET = lib/libc