1 # Rules.make for uClibc
3 # Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
5 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
8 # check for proper make version
9 ifneq ($(findstring 3.7,$(MAKE_VERSION)),)
10 $(error Your make is too old $(MAKE_VERSION). Go get at least 3.80)
13 #-----------------------------------------------------------
14 # This file contains rules which are shared between multiple
15 # Makefiles. All normal configuration options live in the
16 # file named ".config". Don't mess with this file unless
17 # you know what you are doing.
20 #-----------------------------------------------------------
21 # If you are running a cross compiler, you will want to set
22 # 'CROSS' to something more interesting ... Target
23 # architecture is determined by asking the CC compiler what
24 # arch it compiles things for, so unless your compiler is
25 # broken, you should not need to specify TARGET_ARCH.
27 # Most people will set this stuff on the command line, i.e.
28 # make CROSS=arm-linux-
29 # will build uClibc for 'arm'.
38 STRIPTOOL = $(CROSS)strip
45 STRIP_FLAGS ?= -x -R .note -R .comment
47 UNIFDEF := $(top_builddir)extra/scripts/unifdef -UUCLIBC_INTERNAL
49 # Select the compiler needed to build binaries for your development system
51 BUILD_CFLAGS = -O2 -Wall
52 export ARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
53 -e s/arm.*/arm/ -e s/sa110/arm/ -e s/sh.*/sh/ \
54 -e s/s390x/s390/ -e s/parisc.*/hppa/ \
55 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
56 -e s/xtensa.*/xtensa/ )
59 #---------------------------------------------------------
60 # Nothing beyond this point should ever be touched by mere
61 # mortals. Unless you hang out with the gods, you should
62 # probably leave all this stuff alone.
64 # Pull in the user's uClibc configuration
65 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
66 -include $(top_builddir).config
69 # Make certain these contain a final "/", but no "//"s.
70 TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
71 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
72 TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | sed -e 's/^TARGET_SUBARCH=//' -e 's/"//g')
73 TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
74 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
75 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
76 KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
77 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
80 # Now config hard core
85 VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
86 ifneq ($(EXTRAVERSION),)
87 VERSION := $(VERSION)$(EXTRAVERSION)
89 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
91 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
94 SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
95 ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
96 UCLIBC_LDSO_NAME := ld64-uClibc
98 UCLIBC_LDSO_NAME := ld-uClibc
100 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
101 NONSHARED_LIBNAME := uclibc_nonshared.a
102 libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
103 libc.depend := $(top_builddir)lib/$(SHARED_MAJORNAME:.$(MAJOR_VERSION)=)
104 interp := $(top_builddir)lib/interp.os
105 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
106 headers_dep := $(top_builddir)include/bits/sysnum.h
107 sub_headers := $(headers_dep)
109 #LIBS :=$(interp) -L$(top_builddir)lib -lc
110 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
112 # Make sure DESTDIR and PREFIX can be used to install
113 # PREFIX is a uClibcism while DESTDIR is a common GNUism
118 ifneq ($(HAVE_SHARED),y)
128 CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
131 # A nifty macro to make testing gcc features easier
133 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
134 then echo "$(1)"; else echo "$(2)"; fi)
136 if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
137 then echo "-Wa,$(1)"; fi)
139 if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
140 then echo "$(1)"; fi)
144 # Flags in OPTIMIZATION are used only for non-debug builds
146 # Use '-Os' optimization if available, else use -O2, allow Config to override
147 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
148 # Use the gcc 3.4 -funit-at-a-time optimization when available
149 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
151 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
152 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
154 ifeq ($(GCC_MAJOR_VER),4)
155 # shrinks code, results are from 4.0.2
157 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
159 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
161 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
164 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
165 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
168 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
169 PICFLAG := $(PICFLAG-y)
172 # Some nice CPU specific optimizations
173 ifeq ($(TARGET_ARCH),i386)
174 OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
176 # NB: this may make SSE insns segfault!
177 # -O1 -march=pentium3, -Os -msse etc are known to be affected.
178 # TODO: conditionally bump to 4
179 # (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685)
180 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
182 # Choice of alignment (please document why!)
183 # -falign-labels: in-line labels
184 # (reachable by normal code flow, aligning will insert nops
185 # which will be executed - may even make things slower)
186 # -falign-jumps: reachable only by a jump
187 # Generic: no alignment at all (smallest code)
188 GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
189 ifeq ($(CONFIG_K7),y)
190 # Align functions to four bytes, use default for jumps and loops (why?)
191 GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
193 ifeq ($(CONFIG_CRUSOE),y)
194 # Use compiler's default for functions, jumps and loops (why?)
195 GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
197 ifeq ($(CONFIG_CYRIXIII),y)
198 # Use compiler's default for functions, jumps and loops (why?)
199 GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
201 OPTIMIZATION+=$(GCC_FALIGN)
203 # Putting each function and data object into its own section
204 # allows for kbytes of less text if users link against static uclibc
205 # using ld --gc-sections.
206 # ld 2.18 can't do that (yet?) for shared libraries, so we itself
207 # do not use --gc-sections at shared lib link time.
208 # However, in combination with sections being sorted by alignment
209 # it does result in much reduced padding:
210 # text data bss dec hex
211 # 235319 1472 5992 242783 3b45f old.so
212 # 234104 1472 5980 241556 3af94 new.so
213 # Without -ffunction-sections, all functions will get aligned
214 # to 4 byte boundary by as/ld. This is arguably a bug in as.
215 # It specifies 4 byte align for .text even if not told to do so:
216 # Idx Name Size VMA LMA File off Algn
217 # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
218 CPU_CFLAGS-y += $(call check_gcc,-ffunction-sections -fdata-sections,)
219 ifneq ($(call check_ld,--sort-common,),)
220 CPU_LDFLAGS-y += -Wl,--sort-common
222 ifneq ($(call check_ld,--sort-section alignment),)
223 CPU_LDFLAGS-y += -Wl,--sort-section,alignment
228 CPU_CFLAGS-$(CONFIG_386)+=-march=i386
229 CPU_CFLAGS-$(CONFIG_486)+=-march=i486
230 CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
231 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
232 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
233 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
234 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
235 CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
236 CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
237 CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
238 CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
239 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
240 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
241 CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
242 CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
243 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
246 ifeq ($(TARGET_ARCH),sparc)
247 CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
248 CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
249 CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
250 CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
253 ifeq ($(TARGET_ARCH),arm)
254 OPTIMIZATION+=-fstrict-aliasing
255 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
256 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
257 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
258 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
259 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
260 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
261 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
262 CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
263 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
264 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
265 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
266 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
267 CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
268 CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
269 CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
270 CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
271 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
272 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
273 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
274 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
275 CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
276 CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
277 CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
280 ifeq ($(TARGET_ARCH),mips)
281 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
282 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
283 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
284 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
285 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
286 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
287 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
288 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
289 ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
290 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
291 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
293 ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
294 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
295 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
297 CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
298 CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
299 CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
302 ifeq ($(TARGET_ARCH),nios)
303 CPU_LDFLAGS-y+=-Wl,-m32
304 CPU_CFLAGS-y+=-Wl,-m32
307 ifeq ($(TARGET_ARCH),sh)
308 OPTIMIZATION+=-fstrict-aliasing
309 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
310 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
311 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
312 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
313 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
314 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
315 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
316 ifeq ($(UCLIBC_HAS_FLOATS),y)
317 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
318 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
320 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
321 CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
325 ifeq ($(TARGET_ARCH),sh64)
326 OPTIMIZATION+=-fstrict-aliasing
327 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-Wl,-EL
328 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-Wl,-EB
329 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
330 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
331 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
334 ifeq ($(TARGET_ARCH),h8300)
336 CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
337 CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
338 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
339 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
342 ifeq ($(TARGET_ARCH),cris)
343 CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
344 CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
345 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
350 ifeq ($(TARGET_ARCH),m68k)
351 # -fPIC is only supported for 68020 and above. It is not supported
352 # for 68000, 68010, or Coldfire.
357 ifeq ($(TARGET_ARCH),powerpc)
358 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
359 # enough. Therefore use -fpic which will reduce code size and generates
363 PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
364 CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
365 CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES -D__NO_LONG_DOUBLE_MATH"
369 ifeq ($(TARGET_ARCH),bfin)
371 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
372 CPU_CFLAGS-y:=-mfdpic
373 CPU_LDFLAGS-y += -Wl,-melf32bfinfd
377 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
378 PICFLAG := -mleaf-id-shared-library
382 ifeq ($(TARGET_ARCH),frv)
383 CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
384 # Using -pie causes the program to have an interpreter, which is
385 # forbidden, so we must make do with -shared. Unfortunately,
386 # -shared by itself would get us global function descriptors
387 # and calls through PLTs, dynamic resolution of symbols, etc,
388 # which would break as well, but -Bsymbolic comes to the rescue.
389 export LDPIEFLAG:=-Wl,-shared -Wl,-Bsymbolic
393 ifeq ($(strip $(TARGET_ARCH)),avr32)
394 CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
395 CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
396 CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
399 ifeq ($(TARGET_ARCH),i960)
403 ifeq ($(TARGET_ARCH),microblaze)
407 ifeq ($(TARGET_ARCH),v850)
411 # Keep the check_gcc from being needlessly executed
413 ifneq ($(UCLIBC_BUILD_PIE),y)
416 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
419 # We need to keep track of both the CC PIE flag (above) as
420 # well as the LD PIE flag (below) because we can't rely on
421 # gcc passing -pie if we used -fPIE
423 ifneq ($(UCLIBC_BUILD_PIE),y)
426 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
430 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
432 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
435 # Add a bunch of extra pedantic annoyingly strict checks
436 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
437 ifeq ($(EXTRA_WARNINGS),y)
438 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
439 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
440 XWARNINGS+=-Wnonnull -Wundef
441 # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
442 #XWARNINGS+=-Wdeclaration-after-statement
444 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
445 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
447 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
448 ifeq ($(UCLIBC_BUILD_SSP),y)
449 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
450 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
451 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
453 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
456 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
457 # Some nice CFLAGS to work with
458 CFLAGS := -include $(top_builddir)include/libc-symbols.h \
459 $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
460 -fno-builtin -nostdinc -I$(top_builddir)include -I. \
461 -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
463 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
464 CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
468 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
469 # If -msoft-float isn't supported, we want an error anyway.
470 # Hmm... might need to revisit this for arm since it has 2 different
471 # soft float encodings.
472 ifneq ($(TARGET_ARCH),nios)
473 ifneq ($(TARGET_ARCH),nios2)
474 CFLAGS += -msoft-float
477 ifeq ($(TARGET_ARCH),arm)
478 # No longer needed with current toolchains, but leave it here for now.
479 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
480 # LDADD_LIBFLOAT=-lfloat
484 # Please let us see private headers' parts
485 CFLAGS += -DUCLIBC_INTERNAL
487 # We need this to be checked within libc-symbols.h
488 ifneq ($(HAVE_SHARED),y)
492 CFLAGS += $(call check_gcc,-std=gnu99,)
494 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -Wl,-shared \
495 -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc
496 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
497 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
499 ifeq ($(UCLIBC_BUILD_RELRO),y)
500 LDFLAGS_NOSTRIP+=-Wl,-z,relro
503 ifeq ($(UCLIBC_BUILD_NOW),y)
504 LDFLAGS_NOSTRIP+=-Wl,-z,now
507 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
508 # Be sure that binutils support it
509 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
510 ifeq ($(LDFLAGS_GNUHASH),)
511 $(error Your binutils don't support --hash-style option, while you want to use it)
513 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
517 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
522 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
527 STRIPTOOL := true -Stripping_disabled
531 # we try to compile all sources at once into an object (IMA), but
532 # gcc-3.3.x does not support it
533 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
534 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
535 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
536 ifeq ($(GCC_MAJOR_VER),3)
539 CFLAGS+=$(call check_gcc,--combine,)
545 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
546 LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
549 ifeq ($(UCLIBC_HAS_THREADS),y)
550 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
553 ifeq ($(LINUXTHREADS_OLD),y)
554 PTNAME := linuxthreads.old
556 PTNAME := linuxthreads
559 PTDIR := $(top_builddir)libpthread/$(PTNAME)
560 # set up system dependencies include dirs (NOTE: order matters!)
561 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
563 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
564 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
565 -I$(PTDIR)/sysdeps/unix/sysv/linux \
566 -I$(PTDIR)/sysdeps/pthread \
567 -I$(PTDIR)/sysdeps/pthread/bits \
568 -I$(PTDIR)/sysdeps/generic \
569 -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
570 -I$(top_srcdir)ldso/include
572 # Test for TLS if NPTL support was selected.
574 GCC_HAS_TLS=$(shell \
575 echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
576 ifneq ($(GCC_HAS_TLS),)
579 @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
580 @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
581 @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
582 @echo "#### about this problem.";
584 @echo "#### Exiting...";
590 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
591 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
592 -I$(PTDIR)/sysdeps/unix/sysv/linux \
593 -I$(PTDIR)/sysdeps/pthread \
595 -I$(top_builddir)libpthread
602 CFLAGS += -I$(KERNEL_HEADERS)
604 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
605 CC_IPREFIX:=$(shell $(CC) --print-file-name=include)
606 CFLAGS += -I$(dir $(CC_IPREFIX))/include-fixed -I$(CC_IPREFIX)
608 ifneq ($(DOASSERTS),y)
612 ifeq ($(SYMBOL_PREFIX),_)
613 CFLAGS+=-D__UCLIBC_UNDERSCORES__
616 # Keep the check_as from being needlessly executed
617 ifndef ASFLAGS_NOEXEC
618 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
619 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
621 export ASFLAGS_NOEXEC :=
624 ASFLAGS = $(ASFLAGS_NOEXEC)
626 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
627 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
628 LIBGCC_DIR:=$(dir $(LIBGCC))
630 # moved from libpthread/linuxthreads
631 ifeq ($(UCLIBC_CTOR_DTOR),y)
632 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
633 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o