Rules.mak

   1 # Rules.make for uClibc
   2 #
   3 # Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
   4 #
   5 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   6 #
   7
   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)
  11 endif
  12
  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.
  18
  19
  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.
  26 #
  27 # Most people will set this stuff on the command line, i.e.
  28 #        make CROSS=arm-linux-
  29 # will build uClibc for 'arm'.
  30
  31 ifndef CROSS
  32 CROSS=
  33 endif
  34 CC         = $(CROSS)gcc
  35 AR         = $(CROSS)ar
  36 LD         = $(CROSS)ld
  37 NM         = $(CROSS)nm
  38 STRIPTOOL  = $(CROSS)strip
  39
  40 INSTALL    = install
  41 LN         = ln
  42 RM         = rm -f
  43 TAR        = tar
  44
  45 STRIP_FLAGS ?= -x -R .note -R .comment
  46
  47 # Select the compiler needed to build binaries for your development system
  48 HOSTCC     = gcc
  49 BUILD_CFLAGS = -O2 -Wall
  50 export ARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
  51                                   -e s/arm.*/arm/ -e s/sa110/arm/ -e s/sh.*/sh/ \
  52                                   -e s/s390x/s390/ -e s/parisc.*/hppa/ \
  53                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  54                                   -e s/xtensa.*/xtensa/ )
  55
  56
  57 #---------------------------------------------------------
  58 # Nothing beyond this point should ever be touched by mere
  59 # mortals.  Unless you hang out with the gods, you should
  60 # probably leave all this stuff alone.
  61
  62 # Pull in the user's uClibc configuration
  63 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  64 -include $(top_builddir).config
  65 endif
  66
  67 # Make certain these contain a final "/", but no "//"s.
  68 TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
  69 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
  70 TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | sed -e 's/^TARGET_SUBARCH=//' -e 's/"//g')
  71 TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
  72 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  73 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  74 KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
  75 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
  76
  77
  78 # Now config hard core
  79 MAJOR_VERSION := 0
  80 MINOR_VERSION := 9
  81 SUBLEVEL      := 29
  82 EXTRAVERSION  :=
  83 VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  84 ifneq ($(EXTRAVERSION),)
  85 VERSION       := $(VERSION)$(EXTRAVERSION)
  86 endif
  87 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  88 LC_ALL := C
  89 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  90
  91 LIBC := libc
  92 SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
  93 ifneq ($(findstring  $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
  94 UCLIBC_LDSO_NAME := ld64-uClibc
  95 else
  96 UCLIBC_LDSO_NAME := ld-uClibc
  97 endif
  98 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
  99 NONSHARED_LIBNAME := uclibc_nonshared.a
 100 libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
 101 interp := $(top_builddir)lib/interp.os
 102 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
 103 headers_dep := $(top_builddir)include/bits/sysnum.h
 104 sub_headers := $(headers_dep)
 105
 106 #LIBS :=$(interp) -L$(top_builddir)lib -lc
 107 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
 108
 109 # Make sure DESTDIR and PREFIX can be used to install
 110 # PREFIX is a uClibcism while DESTDIR is a common GNUism
 111 ifndef PREFIX
 112 PREFIX = $(DESTDIR)
 113 endif
 114
 115 ifneq ($(HAVE_SHARED),y)
 116 libc :=
 117 interp :=
 118 ldso :=
 119 endif
 120
 121 comma:=,
 122 space:= #
 123
 124 ifndef CROSS
 125 CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
 126 endif
 127
 128 # A nifty macro to make testing gcc features easier
 129 check_gcc=$(shell \
 130         if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
 131         then echo "$(1)"; else echo "$(2)"; fi)
 132 check_as=$(shell \
 133         if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
 134         then echo "-Wa,$(1)"; fi)
 135 check_ld=$(shell \
 136         if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
 137         then echo "$(1)"; fi)
 138
 139 ARFLAGS:=cr
 140
 141 OPTIMIZATION:=
 142 # Use '-Os' optimization if available, else use -O2, allow Config to override
 143 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 144 # Use the gcc 3.4 -funit-at-a-time optimization when available
 145 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
 146
 147 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
 148 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
 149
 150 ifeq ($(GCC_MAJOR_VER),4)
 151 # shrinks code, results are from 4.0.2
 152 # 0.36%
 153 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
 154 # 0.34%
 155 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
 156 # 0.1%
 157 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
 158 endif
 159
 160 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
 161 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
 162
 163 PICFLAG-y := -fPIC
 164 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
 165 PICFLAG := $(PICFLAG-y)
 166 PIEFLAG_NAME:=-fPIE
 167
 168 # Some nice CPU specific optimizations
 169 ifeq ($(TARGET_ARCH),i386)
 170         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
 171         OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
 172         CPU_LDFLAGS-y+=-m32
 173         CPU_CFLAGS-y+=-m32
 174         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
 175         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
 176         CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
 177         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
 178         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
 179         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
 180         CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
 181         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
 182         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
 183         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
 184         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
 185         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
 186         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
 187         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
 188         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
 189         CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
 190 endif
 191
 192 ifeq ($(TARGET_ARCH),sparc)
 193         CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
 194         CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
 195         CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
 196         CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
 197 endif
 198
 199 ifeq ($(TARGET_ARCH),arm)
 200         OPTIMIZATION+=-fstrict-aliasing
 201         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 202         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 203         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 204         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 205         CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
 206         CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
 207         CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
 208         CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
 209         CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
 210         CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
 211         CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
 212         CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
 213         CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
 214         CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
 215         CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
 216         CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
 217         CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
 218         CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
 219         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
 220         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
 221         CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
 222 endif
 223
 224 ifeq ($(TARGET_ARCH),mips)
 225         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 226         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 227         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
 228         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
 229         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
 230         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
 231         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
 232         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
 233         ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
 234                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
 235                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
 236         endif
 237         ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
 238                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
 239                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
 240         endif
 241         CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
 242         CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
 243         CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
 244 endif
 245
 246 ifeq ($(TARGET_ARCH),nios)
 247         CPU_LDFLAGS-y+=-Wl,-m32
 248         CPU_CFLAGS-y+=-Wl,-m32
 249 endif
 250
 251 ifeq ($(TARGET_ARCH),sh)
 252         OPTIMIZATION+=-fstrict-aliasing
 253         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 254         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 255         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 256         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
 257         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 258         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 259         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
 260 ifeq ($(UCLIBC_HAS_FLOATS),y)
 261         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
 262         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 263 else
 264         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
 265         CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
 266 endif
 267 endif
 268
 269 ifeq ($(TARGET_ARCH),sh64)
 270         OPTIMIZATION+=-fstrict-aliasing
 271         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-Wl,-EL
 272         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-Wl,-EB
 273         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 274         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 275         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 276 endif
 277
 278 ifeq ($(TARGET_ARCH),h8300)
 279         SYMBOL_PREFIX=_
 280         CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
 281         CPU_LDFLAGS-$(CONFIG_H8S)   += -Wl,-ms8300s
 282         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
 283         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32
 284 endif
 285
 286 ifeq ($(TARGET_ARCH),cris)
 287         CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
 288         CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
 289         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 290         PICFLAG:=-fpic
 291         PIEFLAG_NAME:=-fpie
 292 endif
 293
 294 ifeq ($(TARGET_ARCH),m68k)
 295         # -fPIC is only supported for 68020 and above.  It is not supported
 296         # for 68000, 68010, or Coldfire.
 297         PICFLAG:=-fpic
 298         PIEFLAG_NAME:=-fpie
 299 endif
 300
 301 ifeq ($(TARGET_ARCH),powerpc)
 302 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
 303 # enough. Therefore use -fpic which will reduce code size and generates
 304 # faster code.
 305         PICFLAG:=-fpic
 306         PIEFLAG_NAME:=-fpie
 307         PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null -  2> /dev/null && echo -n y || echo -n n)
 308         CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
 309         CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES -D__NO_LONG_DOUBLE_MATH"
 310
 311 endif
 312
 313 ifeq ($(TARGET_ARCH),bfin)
 314         SYMBOL_PREFIX=_
 315 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
 316         CPU_CFLAGS-y:=-mfdpic
 317         CPU_LDFLAGS-y += -Wl,-melf32bfinfd
 318         PICFLAG:=-fpic
 319         PIEFLAG_NAME:=-fpie
 320 endif
 321 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
 322         PICFLAG := -mleaf-id-shared-library
 323 endif
 324 endif
 325
 326 ifeq ($(TARGET_ARCH),frv)
 327         CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
 328         # Using -pie causes the program to have an interpreter, which is
 329         # forbidden, so we must make do with -shared.  Unfortunately,
 330         # -shared by itself would get us global function descriptors
 331         # and calls through PLTs, dynamic resolution of symbols, etc,
 332         # which would break as well, but -Bsymbolic comes to the rescue.
 333         export LDPIEFLAG:=-Wl,-shared -Wl,-Bsymbolic
 334         UCLIBC_LDSO=ld.so.1
 335 endif
 336
 337 ifeq ($(strip $(TARGET_ARCH)),avr32)
 338        CPU_CFLAGS-$(CONFIG_AVR32_AP7)  += -march=ap
 339        CPU_CFLAGS-$(CONFIG_LINKRELAX)  += -mrelax
 340        CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
 341 endif
 342
 343 ifeq ($(TARGET_ARCH),i960)
 344       SYMBOL_PREFIX=_
 345 endif
 346
 347 ifeq ($(TARGET_ARCH),microblaze)
 348       SYMBOL_PREFIX=_
 349 endif
 350
 351 ifeq ($(TARGET_ARCH),v850)
 352       SYMBOL_PREFIX=_
 353 endif
 354
 355 # Keep the check_gcc from being needlessly executed
 356 ifndef PIEFLAG
 357 ifneq ($(UCLIBC_BUILD_PIE),y)
 358 export PIEFLAG:=
 359 else
 360 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
 361 endif
 362 endif
 363 # We need to keep track of both the CC PIE flag (above) as
 364 # well as the LD PIE flag (below) because we can't rely on
 365 # gcc passing -pie if we used -fPIE
 366 ifndef LDPIEFLAG
 367 ifneq ($(UCLIBC_BUILD_PIE),y)
 368 export LDPIEFLAG:=
 369 else
 370 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
 371 endif
 372 endif
 373
 374 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
 375 ifndef ASNEEDED
 376 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
 377 endif
 378
 379 # Add a bunch of extra pedantic annoyingly strict checks
 380 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
 381 ifeq ($(EXTRA_WARNINGS),y)
 382 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
 383 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
 384 XWARNINGS+=-Wnonnull -Wundef
 385 # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
 386 #XWARNINGS+=-Wdeclaration-after-statement
 387 endif
 388 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
 389 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
 390
 391 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
 392 ifeq ($(UCLIBC_BUILD_SSP),y)
 393 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
 394 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
 395 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
 396 else
 397 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
 398 endif
 399
 400 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
 401 # Some nice CFLAGS to work with
 402 CFLAGS := -include $(top_builddir)include/libc-symbols.h \
 403         $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
 404         -fno-builtin -nostdinc -I$(top_builddir)include -I.
 405
 406 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
 407 CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
 408 endif
 409
 410 LDADD_LIBFLOAT=
 411 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 412 # If -msoft-float isn't supported, we want an error anyway.
 413 # Hmm... might need to revisit this for arm since it has 2 different
 414 # soft float encodings.
 415 ifneq ($(TARGET_ARCH),nios)
 416 ifneq ($(TARGET_ARCH),nios2)
 417 CFLAGS += -msoft-float
 418 endif
 419 endif
 420 ifeq ($(TARGET_ARCH),arm)
 421 # No longer needed with current toolchains, but leave it here for now.
 422 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
 423 #    LDADD_LIBFLOAT=-lfloat
 424 endif
 425 endif
 426
 427 # We need this to be checked within libc-symbols.h
 428 ifneq ($(HAVE_SHARED),y)
 429 CFLAGS += -DSTATIC
 430 endif
 431
 432 CFLAGS += $(call check_gcc,-std=gnu99,)
 433
 434 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -Wl,-shared \
 435         -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc
 436 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
 437 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
 438
 439 ifeq ($(UCLIBC_BUILD_RELRO),y)
 440 LDFLAGS_NOSTRIP+=-Wl,-z,relro
 441 endif
 442
 443 ifeq ($(UCLIBC_BUILD_NOW),y)
 444 LDFLAGS_NOSTRIP+=-Wl,-z,now
 445 endif
 446
 447 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
 448 # Be sure that binutils support it
 449 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
 450 ifeq ($(LDFLAGS_GNUHASH),)
 451 $(error Your binutils don't support --hash-style option, while you want to use it)
 452 else
 453 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
 454 endif
 455 endif
 456
 457 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
 458 ifeq ($(DODEBUG),y)
 459 #CFLAGS += -g3
 460 CFLAGS += -O0 -g3
 461 else
 462 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
 463 endif
 464 ifeq ($(DOSTRIP),y)
 465 LDFLAGS += -Wl,-s
 466 else
 467 STRIPTOOL := true -Stripping_disabled
 468 endif
 469
 470 ifeq ($(DOMULTI),y)
 471 # we try to compile all sources at once into an object (IMA), but
 472 # gcc-3.3.x does not support it
 473 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
 474 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
 475 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
 476 ifeq ($(GCC_MAJOR_VER),3)
 477 DOMULTI:=n
 478 else
 479 CFLAGS+=$(call check_gcc,--combine,)
 480 endif
 481 else
 482 DOMULTI:=n
 483 endif
 484
 485 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
 486 LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
 487 endif
 488
 489 ifeq ($(UCLIBC_HAS_THREADS),y)
 490 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 491         PTNAME := nptl
 492 else
 493 ifeq ($(LINUXTHREADS_OLD),y)
 494         PTNAME := linuxthreads.old
 495 else
 496         PTNAME := linuxthreads
 497 endif
 498 endif
 499 PTDIR := $(top_builddir)libpthread/$(PTNAME)
 500 # set up system dependencies include dirs (NOTE: order matters!)
 501 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 502 PTINC:= -I$(PTDIR)                                              \
 503         -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)       \
 504         -I$(PTDIR)/sysdeps/$(TARGET_ARCH)                       \
 505         -I$(PTDIR)/sysdeps/unix/sysv/linux                      \
 506         -I$(PTDIR)/sysdeps/pthread                              \
 507         -I$(PTDIR)/sysdeps/pthread/bits                         \
 508         -I$(PTDIR)/sysdeps/generic                              \
 509         -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH)                 \
 510         -I$(top_srcdir)ldso/include
 511 #
 512 # Test for TLS if NPTL support was selected.
 513 #
 514 GCC_HAS_TLS=$(shell \
 515         echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
 516 ifneq ($(GCC_HAS_TLS),)
 517 gcc_tls_test_fail:
 518         @echo "####";
 519         @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
 520         @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
 521         @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
 522         @echo "#### about this problem.";
 523         @echo "####";
 524         @echo "#### Exiting...";
 525         @echo "####";
 526         @exit 1;
 527 endif
 528 else
 529 PTINC := \
 530         -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
 531         -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
 532         -I$(PTDIR)/sysdeps/unix/sysv/linux \
 533         -I$(PTDIR)/sysdeps/pthread \
 534         -I$(PTDIR) \
 535         -I$(top_builddir)libpthread
 536 endif
 537 CFLAGS+=$(PTINC)
 538 else
 539         PTNAME :=
 540         PTINC  :=
 541 endif
 542 CFLAGS += -I$(KERNEL_HEADERS)
 543
 544 CFLAGS += -iwithprefix include-fixed -iwithprefix include
 545
 546 ifneq ($(DOASSERTS),y)
 547 CFLAGS+=-DNDEBUG
 548 endif
 549
 550 ifeq ($(SYMBOL_PREFIX),_)
 551 CFLAGS+=-D__UCLIBC_UNDERSCORES__
 552 endif
 553
 554 # Keep the check_as from being needlessly executed
 555 ifndef ASFLAGS_NOEXEC
 556 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
 557 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
 558 else
 559 export ASFLAGS_NOEXEC :=
 560 endif
 561 endif
 562 ASFLAGS = $(ASFLAGS_NOEXEC)
 563
 564 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 565 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 566 LIBGCC_DIR:=$(dir $(LIBGCC))
 567
 568 # moved from libpthread/linuxthreads
 569 ifeq ($(UCLIBC_CTOR_DTOR),y)
 570 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
 571 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
 572 endif