1 # Rules.make for uClibc
3 # Copyright (C) 2000-2008 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 ($(findstring x3.7,x$(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
47 STRIP_FLAGS ?= -x -R .note -R .comment
49 ## unused? if yes, remove after 0.9.31
50 ## UNIFDEF := $(top_builddir)extra/scripts/unifdef -UUCLIBC_INTERNAL
52 # Select the compiler needed to build binaries for your development system
54 BUILD_CFLAGS = -O2 -Wall
55 export ARCH := $(shell uname -m | $(SED) -e s/i.86/i386/ \
56 -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
57 -e s/arm.*/arm/ -e s/sa110/arm/ \
59 -e s/s390x/s390/ -e s/parisc.*/hppa/ \
60 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
61 -e s/xtensa.*/xtensa/ )
64 #---------------------------------------------------------
65 # Nothing beyond this point should ever be touched by mere
66 # mortals. Unless you hang out with the gods, you should
67 # probably leave all this stuff alone.
69 # Pull in the user's uClibc configuration
70 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
71 -include $(top_builddir).config
74 # Make certain these contain a final "/", but no "//"s.
75 TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_ARCH=//' -e 's/"//g')
76 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
77 TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_SUBARCH=//' -e 's/"//g')
78 TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
79 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
80 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
81 KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
82 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
85 # Now config hard core
90 VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
91 ifneq ($(EXTRAVERSION),)
92 VERSION := $(VERSION)$(EXTRAVERSION)
94 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
96 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
99 SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
100 ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
101 UCLIBC_LDSO_NAME := ld64-uClibc
102 ARCH_NATIVE_BIT := 64
104 UCLIBC_LDSO_NAME := ld-uClibc
105 ARCH_NATIVE_BIT := 32
107 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
108 NONSHARED_LIBNAME := uclibc_nonshared.a
109 libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
110 libc.depend := $(top_builddir)lib/$(SHARED_MAJORNAME:.$(MAJOR_VERSION)=)
111 interp := $(top_builddir)lib/interp.os
112 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
113 headers_dep := $(top_builddir)include/bits/sysnum.h
114 sub_headers := $(headers_dep)
116 #LIBS :=$(interp) -L$(top_builddir)lib -lc
117 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
119 # Make sure DESTDIR and PREFIX can be used to install
120 # PREFIX is a uClibcism while DESTDIR is a common GNUism
125 ifneq ($(HAVE_SHARED),y)
135 CROSS=$(strip $(subst ",, $(CROSS_COMPILER_PREFIX)))
138 # A nifty macro to make testing gcc features easier
140 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
141 then echo "$(1)"; else echo "$(2)"; fi)
143 if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
144 then echo "-Wa,$(1)"; fi)
146 if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
147 then echo "$(1)"; fi)
151 # Flags in OPTIMIZATION are used only for non-debug builds
153 # Use '-Os' optimization if available, else use -O2, allow Config to override
154 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
155 # Use the gcc 3.4 -funit-at-a-time optimization when available
156 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
158 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
159 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
161 ifeq ($(GCC_MAJOR_VER),4)
162 # shrinks code, results are from 4.0.2
164 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
166 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
168 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
171 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
172 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
175 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
176 PICFLAG := $(PICFLAG-y)
179 # Some nice CPU specific optimizations
180 ifeq ($(TARGET_ARCH),i386)
181 OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
183 ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
184 # Non-SSE capable processor.
185 # NB: this may make SSE insns segfault!
186 # -O1 -march=pentium3, -Os -msse etc are known to be affected.
187 # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
188 # -m32 is needed if host is 64-bit
189 OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
191 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
194 # Choice of alignment (please document why!)
195 # -falign-labels: in-line labels
196 # (reachable by normal code flow, aligning will insert nops
197 # which will be executed - may even make things slower)
198 # -falign-jumps: reachable only by a jump
199 # Generic: no alignment at all (smallest code)
200 GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
201 ifeq ($(CONFIG_K7),y)
202 # Align functions to four bytes, use default for jumps and loops (why?)
203 GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
205 ifeq ($(CONFIG_CRUSOE),y)
206 # Use compiler's default for functions, jumps and loops (why?)
207 GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
209 ifeq ($(CONFIG_CYRIXIII),y)
210 # Use compiler's default for functions, jumps and loops (why?)
211 GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
213 OPTIMIZATION+=$(GCC_FALIGN)
215 # Putting each function and data object into its own section
216 # allows for kbytes of less text if users link against static uclibc
217 # using ld --gc-sections.
218 # ld 2.18 can't do that (yet?) for shared libraries, so we itself
219 # do not use --gc-sections at shared lib link time.
220 # However, in combination with sections being sorted by alignment
221 # it does result in much reduced padding:
222 # text data bss dec hex
223 # 235319 1472 5992 242783 3b45f old.so
224 # 234104 1472 5980 241556 3af94 new.so
225 # Without -ffunction-sections, all functions will get aligned
226 # to 4 byte boundary by as/ld. This is arguably a bug in as.
227 # It specifies 4 byte align for .text even if not told to do so:
228 # Idx Name Size VMA LMA File off Algn
229 # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
230 CPU_CFLAGS-y += $(call check_gcc,-ffunction-sections -fdata-sections,)
231 ifneq ($(call check_ld,--sort-common,),)
232 CPU_LDFLAGS-y += -Wl,--sort-common
234 ifneq ($(call check_ld,--sort-section alignment),)
235 CPU_LDFLAGS-y += -Wl,--sort-section,alignment
240 CPU_CFLAGS-$(CONFIG_386)+=-march=i386
241 CPU_CFLAGS-$(CONFIG_486)+=-march=i486
242 CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
243 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
244 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
245 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
246 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
247 CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
248 CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
249 CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
250 CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
251 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
252 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
253 CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
254 CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
255 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
258 ifeq ($(TARGET_ARCH),sparc)
259 CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
260 CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
261 CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
262 CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
265 ifeq ($(TARGET_ARCH),arm)
266 OPTIMIZATION+=-fstrict-aliasing
267 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
268 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
269 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
270 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
271 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
272 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
273 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
274 CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
275 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
276 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
277 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
278 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
279 CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
280 CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
281 CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
282 CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
283 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
284 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
285 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
286 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
287 CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
288 CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
289 CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
292 ifeq ($(TARGET_ARCH),mips)
293 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
294 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
295 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
296 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
297 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
298 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
299 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
300 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
301 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
302 ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
303 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
304 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
306 ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
307 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
308 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
310 CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
311 CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
312 CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
315 ifeq ($(TARGET_ARCH),nios)
316 CPU_LDFLAGS-y+=-Wl,-m32
317 CPU_CFLAGS-y+=-Wl,-m32
320 ifeq ($(TARGET_ARCH),sh)
321 OPTIMIZATION+=-fstrict-aliasing
322 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
323 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
324 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
325 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
326 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
327 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
328 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
329 ifeq ($(UCLIBC_HAS_FLOATS),y)
330 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
331 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
333 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
334 CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
338 ifeq ($(TARGET_ARCH),sh64)
339 OPTIMIZATION+=-fstrict-aliasing
340 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-Wl,-EL
341 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-Wl,-EB
342 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
343 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
344 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
347 ifeq ($(TARGET_ARCH),h8300)
349 CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
350 CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
351 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
352 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
355 ifeq ($(TARGET_ARCH),cris)
356 CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
357 CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
358 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
363 ifeq ($(TARGET_ARCH),m68k)
364 # -fPIC is only supported for 68020 and above. It is not supported
365 # for 68000, 68010, or Coldfire.
370 ifeq ($(TARGET_ARCH),powerpc)
371 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
372 # enough. Therefore use -fpic which will reduce code size and generates
376 PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
377 CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
378 CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
382 ifeq ($(TARGET_ARCH),bfin)
384 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
385 CPU_CFLAGS-y:=-mfdpic
386 CPU_LDFLAGS-y += -Wl,-melf32bfinfd
390 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
391 PICFLAG := -mleaf-id-shared-library
395 ifeq ($(TARGET_ARCH),frv)
396 CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
397 # Using -pie causes the program to have an interpreter, which is
398 # forbidden, so we must make do with -shared. Unfortunately,
399 # -shared by itself would get us global function descriptors
400 # and calls through PLTs, dynamic resolution of symbols, etc,
401 # which would break as well, but -Bsymbolic comes to the rescue.
402 export LDPIEFLAG:=-Wl,-shared -Wl,-Bsymbolic
406 ifeq ($(strip $(TARGET_ARCH)),avr32)
407 CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
408 CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
409 CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
412 ifeq ($(TARGET_ARCH),i960)
416 ifeq ($(TARGET_ARCH),microblaze)
420 ifeq ($(TARGET_ARCH),v850)
424 # Keep the check_gcc from being needlessly executed
426 ifneq ($(UCLIBC_BUILD_PIE),y)
429 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
432 # We need to keep track of both the CC PIE flag (above) as
433 # well as the LD PIE flag (below) because we can't rely on
434 # gcc passing -pie if we used -fPIE
436 ifneq ($(UCLIBC_BUILD_PIE),y)
439 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
443 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
445 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
448 # Add a bunch of extra pedantic annoyingly strict checks
449 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
450 ifeq ($(EXTRA_WARNINGS),y)
451 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
452 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
453 XWARNINGS+=-Wnonnull -Wundef
454 # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
455 #XWARNINGS+=-Wdeclaration-after-statement
457 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
458 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
460 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
461 ifeq ($(UCLIBC_BUILD_SSP),y)
462 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
463 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
464 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
466 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
469 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
470 # Some nice CFLAGS to work with
471 # Why -funsigned-char: I hunted a bug related to incorrect
472 # sign extension of 'char' type for 10 hours straight. Not fun.
473 CFLAGS := -include $(top_builddir)include/libc-symbols.h \
474 $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
475 -funsigned-char -fno-builtin -nostdinc -I$(top_builddir)include -I. \
476 -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
478 # Make sure that we can be built with non-C99 compilers, too.
479 # Use __\1__ instead.
480 CFLAGS += $(call check_gcc,-fno-asm,)
481 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
482 CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
486 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
487 # If -msoft-float isn't supported, we want an error anyway.
488 # Hmm... might need to revisit this for arm since it has 2 different
489 # soft float encodings.
490 ifneq ($(TARGET_ARCH),nios)
491 ifneq ($(TARGET_ARCH),nios2)
492 ifneq ($(TARGET_ARCH),sh)
493 CFLAGS += -msoft-float
497 ifeq ($(TARGET_ARCH),arm)
498 # No longer needed with current toolchains, but leave it here for now.
499 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
500 # LDADD_LIBFLOAT=-lfloat
504 # Please let us see private headers' parts
505 CFLAGS += -DUCLIBC_INTERNAL
507 # We need this to be checked within libc-symbols.h
508 ifneq ($(HAVE_SHARED),y)
512 CFLAGS += $(call check_gcc,-std=gnu99,)
514 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -Wl,-shared \
515 -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc
516 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
517 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
519 ifeq ($(UCLIBC_BUILD_RELRO),y)
520 LDFLAGS_NOSTRIP+=-Wl,-z,relro
523 ifeq ($(UCLIBC_BUILD_NOW),y)
524 LDFLAGS_NOSTRIP+=-Wl,-z,now
527 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
528 # Be sure that binutils support it
529 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
530 ifeq ($(LDFLAGS_GNUHASH),)
531 $(error Your binutils don't support --hash-style option, while you want to use it)
533 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
537 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
541 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
546 STRIPTOOL := true -Stripping_disabled
550 # we try to compile all sources at once into an object (IMA), but
551 # gcc-3.3.x does not support it
552 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
553 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
554 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
555 ifeq ($(GCC_MAJOR_VER),3)
558 CFLAGS+=$(call check_gcc,--combine,)
564 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
565 LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
568 ifeq ($(UCLIBC_HAS_THREADS),y)
569 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
572 ifeq ($(LINUXTHREADS_OLD),y)
573 PTNAME := linuxthreads.old
575 PTNAME := linuxthreads
578 PTDIR := $(top_builddir)libpthread/$(PTNAME)
579 # set up system dependencies include dirs (NOTE: order matters!)
580 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
582 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
583 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
584 -I$(PTDIR)/sysdeps/unix/sysv/linux \
585 -I$(PTDIR)/sysdeps/pthread \
586 -I$(PTDIR)/sysdeps/pthread/bits \
587 -I$(PTDIR)/sysdeps/generic \
588 -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
589 -I$(top_srcdir)ldso/include
591 # Test for TLS if NPTL support was selected.
593 GCC_HAS_TLS=$(shell \
594 echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
595 ifneq ($(GCC_HAS_TLS),)
598 @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
599 @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
600 @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
601 @echo "#### about this problem.";
603 @echo "#### Exiting...";
609 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
610 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
611 -I$(PTDIR)/sysdeps/unix/sysv/linux \
612 -I$(PTDIR)/sysdeps/pthread \
614 -I$(top_builddir)libpthread
621 CFLAGS += -I$(KERNEL_HEADERS)
623 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
624 CC_IPREFIX:=$(shell $(CC) --print-file-name=include)
625 CFLAGS += -I$(dir $(CC_IPREFIX))/include-fixed -I$(CC_IPREFIX)
627 ifneq ($(DOASSERTS),y)
631 ifeq ($(SYMBOL_PREFIX),_)
632 CFLAGS+=-D__UCLIBC_UNDERSCORES__
635 # Keep the check_as from being needlessly executed
636 ifndef ASFLAGS_NOEXEC
637 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
638 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
640 export ASFLAGS_NOEXEC :=
643 ASFLAGS = $(ASFLAGS_NOEXEC)
645 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
646 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
647 LIBGCC_DIR:=$(dir $(LIBGCC))
649 # moved from libpthread/linuxthreads
650 ifeq ($(UCLIBC_CTOR_DTOR),y)
651 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
652 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
655 LOCAL_INSTALL_PATH := install_dir