Rules.mak

   1 # Rules.make for uClibc
   2 #
   3 # Copyright (C) 2000-2008 Erik Andersen <andersen@uclibc.org>
   4 #
   5 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   6 #
   7
   8 # make nano-doc
   9 # FOO = bar  -- recursively expanded variable. Value is remebered verbatim.
  10 #               If it contains references to other variables, these references
  11 #               are expanded whenever this variable is _substituted_.
  12 # FOO := bar -- simply expanded variable. Right hand is expanded when
  13 #               the variable is _defined_. Therefore faster than =.
  14 # FOO ?= bar -- set a value only if it is not already set
  15 #               (behaves as =, not :=).
  16 # FOO += bar -- append; if FOO is not defined, acts like = (not :=).
  17
  18
  19 # check for proper make version
  20 ifneq ($(findstring x3.7,x$(MAKE_VERSION)),)
  21 $(error Your make is too old $(MAKE_VERSION). Go get at least 3.80)
  22 endif
  23
  24 #-----------------------------------------------------------
  25 # This file contains rules which are shared between multiple
  26 # Makefiles.  All normal configuration options live in the
  27 # file named ".config".  Don't mess with this file unless
  28 # you know what you are doing.
  29
  30
  31 #-----------------------------------------------------------
  32 # If you are running a cross compiler, you will want to set
  33 # 'CROSS' to something more interesting ...  Target
  34 # architecture is determined by asking the CC compiler what
  35 # arch it compiles things for, so unless your compiler is
  36 # broken, you should not need to specify TARGET_ARCH.
  37 #
  38 # Most people will set this stuff on the command line, i.e.
  39 #        make CROSS=arm-linux-
  40 # will build uClibc for 'arm'.
  41
  42 ifndef CROSS
  43 CROSS=
  44 endif
  45 CC         = $(CROSS)gcc
  46 AR         = $(CROSS)ar
  47 LD         = $(CROSS)ld
  48 NM         = $(CROSS)nm
  49 OBJDUMP    = $(CROSS)objdump
  50 STRIPTOOL  = $(CROSS)strip
  51
  52 INSTALL    = install
  53 LN         = ln
  54 RM         = rm -f
  55 TAR        = tar
  56 SED        = sed
  57 AWK        = awk
  58
  59 STRIP_FLAGS ?= -x -R .note -R .comment
  60
  61 ## unused? if yes, remove after 0.9.31
  62 ## UNIFDEF := $(top_builddir)extra/scripts/unifdef
  63
  64 # Select the compiler needed to build binaries for your development system
  65 HOSTCC     = gcc
  66 BUILD_CFLAGS = -Os -Wall
  67
  68 #---------------------------------------------------------
  69 # Nothing beyond this point should ever be touched by mere
  70 # mortals.  Unless you hang out with the gods, you should
  71 # probably leave all this stuff alone.
  72
  73 # strip quotes
  74 qstrip = $(strip $(subst ",,$(1)))
  75 #"))
  76
  77 # Pull in the user's uClibc configuration
  78 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  79 -include $(top_builddir).config
  80 endif
  81 TARGET_ARCH:=$(call qstrip,$(TARGET_ARCH))
  82 ifeq ($(TARGET_ARCH),)
  83 ARCH ?= $(shell uname -m | $(SED) -e s/i.86/i386/ \
  84                                   -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
  85                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
  86                                   -e s/sh.*/sh/ \
  87                                   -e s/s390x/s390/ -e s/parisc.*/hppa/ \
  88                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  89                                   -e s/xtensa.*/xtensa/ )
  90 else
  91 ARCH = $(TARGET_ARCH)
  92 endif
  93 export ARCH
  94
  95 # Make certain these contain a final "/", but no "//"s.
  96 TARGET_SUBARCH:=$(call qstrip,$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_SUBARCH=//'))
  97 TARGET_SUBARCH:=$(call qstrip,$(TARGET_SUBARCH))
  98 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(RUNTIME_PREFIX)))))
  99 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(DEVEL_PREFIX)))))
 100 MULTILIB_DIR:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(MULTILIB_DIR)))))
 101 KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(KERNEL_HEADERS)))))
 102 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
 103
 104
 105 # Now config hard core
 106 MAJOR_VERSION := 0
 107 MINOR_VERSION := 9
 108 SUBLEVEL      := 33
 109 EXTRAVERSION  :=-git
 110 VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
 111 ABI_VERSION   := $(MAJOR_VERSION)
 112 ifneq ($(EXTRAVERSION),)
 113 VERSION       := $(VERSION)$(EXTRAVERSION)
 114 endif
 115 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
 116 LC_ALL := C
 117 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL
 118
 119 LIBC := libc
 120 SHARED_LIBNAME := $(LIBC).so.$(ABI_VERSION)
 121 UBACKTRACE_DSO := libubacktrace.so.$(MAJOR_VERSION)
 122 ifneq ($(findstring  $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
 123 UCLIBC_LDSO_NAME := ld64-uClibc
 124 ARCH_NATIVE_BIT := 64
 125 else
 126 UCLIBC_LDSO_NAME := ld-uClibc
 127 ARCH_NATIVE_BIT := 32
 128 endif
 129 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION)
 130 NONSHARED_LIBNAME := uclibc_nonshared.a
 131 libc := $(top_builddir)lib/$(SHARED_LIBNAME)
 132 libc.depend := $(top_builddir)lib/$(SHARED_LIBNAME:.$(ABI_VERSION)=)
 133 ifneq ($(ARCH_HAS_NO_SHARED),y)
 134 libdl.depend := $(top_builddir)lib/libdl.so
 135 endif
 136 ifneq ($(HAS_NO_THREADS),y)
 137 libpthread.depend := $(top_builddir)lib/libpthread.so
 138 endif
 139 interp := $(top_builddir)lib/interp.os
 140 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
 141 headers_dep := $(top_builddir)include/bits/sysnum.h
 142 sub_headers := $(headers_dep)
 143
 144 #LIBS :=$(interp) -L$(top_builddir)lib -lc
 145 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(ABI_VERSION)=)
 146
 147 # Make sure DESTDIR and PREFIX can be used to install
 148 # PREFIX is a uClibcism while DESTDIR is a common GNUism
 149 ifndef PREFIX
 150 PREFIX = $(DESTDIR)
 151 endif
 152
 153 ifneq ($(HAVE_SHARED),y)
 154 libc :=
 155 interp :=
 156 ldso :=
 157 endif
 158
 159 comma:=,
 160 space:= #
 161
 162 ifndef CROSS
 163 CROSS=$(call qstrip,$(CROSS_COMPILER_PREFIX))
 164 endif
 165
 166 # A nifty macro to make testing gcc features easier
 167 check_gcc=$(shell \
 168         if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
 169         then echo "$(1)"; else echo "$(2)"; fi)
 170 check_as=$(shell \
 171         if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
 172         then echo "-Wa,$(1)"; fi)
 173 check_ld=$(shell \
 174         if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
 175         then echo "$(1)"; fi)
 176
 177 ARFLAGS:=cr
 178
 179
 180 # Flags in OPTIMIZATION are used only for non-debug builds
 181
 182 OPTIMIZATION:=
 183 # Use '-Os' optimization if available, else use -O2, allow Config to override
 184 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 185 # Use the gcc 3.4 -funit-at-a-time optimization when available
 186 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
 187 # shrinks code by about 0.1%
 188 OPTIMIZATION+=$(call check_gcc,-fmerge-all-constants)
 189 OPTIMIZATION+=$(call check_gcc,-fstrict-aliasing)
 190
 191 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
 192 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
 193
 194 ifeq ($(GCC_MAJOR_VER),4)
 195 # shrinks code, results are from 4.0.2
 196 # 0.36%
 197 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
 198 # 0.34%
 199 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
 200 # 0.1%
 201 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
 202 endif
 203
 204
 205 # CPU_CFLAGS-y contain options which are not warnings,
 206 # not include or library paths, and not optimizations.
 207
 208 # Why -funsigned-char: I hunted a bug related to incorrect
 209 # sign extension of 'char' type for 10 hours straight. Not fun.
 210 CPU_CFLAGS-y := -funsigned-char -fno-builtin
 211
 212 CPU_CFLAGS-y += $(call check_gcc,-fno-asm,)
 213
 214 LDADD_LIBFLOAT=
 215 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 216 # If -msoft-float isn't supported, we want an error anyway.
 217 # Hmm... might need to revisit this for arm since it has 2 different
 218 # soft float encodings.
 219 ifneq ($(TARGET_ARCH),nios)
 220 ifneq ($(TARGET_ARCH),nios2)
 221 ifneq ($(TARGET_ARCH),sh)
 222 ifneq ($(TARGET_ARCH),c6x)
 223 CPU_CFLAGS-y += -msoft-float
 224 endif
 225 endif
 226 endif
 227 endif
 228 ifeq ($(TARGET_ARCH),arm)
 229 # No longer needed with current toolchains, but leave it here for now.
 230 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
 231 #    LDADD_LIBFLOAT=-lfloat
 232 endif
 233 endif
 234
 235 CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,)
 236
 237 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
 238 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
 239
 240 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
 241 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)    += -Wl,-EB
 242
 243 PICFLAG-y := -fPIC
 244 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
 245 PICFLAG-$(UCLIBC_FORMAT_DSBT_ELF)  := -mdsbt -fpic
 246 PICFLAG := $(PICFLAG-y)
 247 PIEFLAG_NAME:=-fPIE
 248
 249 # Some nice CPU specific optimizations
 250 ifeq ($(TARGET_ARCH),i386)
 251         OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
 252
 253 ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
 254         # Non-SSE capable processor.
 255         # NB: this may make SSE insns segfault!
 256         # -O1 -march=pentium3, -Os -msse etc are known to be affected.
 257         # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
 258         # -m32 is needed if host is 64-bit
 259         OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
 260 else
 261         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
 262 endif
 263
 264         # Choice of alignment (please document why!)
 265         #  -falign-labels: in-line labels
 266         #  (reachable by normal code flow, aligning will insert nops
 267         #  which will be executed - may even make things slower)
 268         #  -falign-jumps: reachable only by a jump
 269         # Generic: no alignment at all (smallest code)
 270         GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
 271 ifeq ($(CONFIG_K7),y)
 272         # Align functions to four bytes, use default for jumps and loops (why?)
 273         GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
 274 endif
 275 ifeq ($(CONFIG_CRUSOE),y)
 276         # Use compiler's default for functions, jumps and loops (why?)
 277         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 278 endif
 279 ifeq ($(CONFIG_CYRIXIII),y)
 280         # Use compiler's default for functions, jumps and loops (why?)
 281         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 282 endif
 283         OPTIMIZATION+=$(GCC_FALIGN)
 284
 285         # Putting each function and data object into its own section
 286         # allows for kbytes of less text if users link against static uclibc
 287         # using ld --gc-sections.
 288         # ld 2.18 can't do that (yet?) for shared libraries, so we itself
 289         # do not use --gc-sections at shared lib link time.
 290         # However, in combination with sections being sorted by alignment
 291         # it does result in much reduced padding:
 292         #   text    data     bss     dec     hex
 293         # 235319    1472    5992  242783   3b45f old.so
 294         # 234104    1472    5980  241556   3af94 new.so
 295         # Without -ffunction-sections, all functions will get aligned
 296         # to 4 byte boundary by as/ld. This is arguably a bug in as.
 297         # It specifies 4 byte align for .text even if not told to do so:
 298         # Idx Name          Size      VMA       LMA       File off  Algn
 299         #   0 .text         xxxxxxxx  00000000  00000000  xxxxxxxx  2**2 <===!
 300         CPU_CFLAGS-y  += $(call check_gcc,-ffunction-sections -fdata-sections,)
 301 ifneq ($(call check_ld,--sort-common),)
 302         CPU_LDFLAGS-y += -Wl,--sort-common
 303 endif
 304 ifneq ($(call check_ld,--sort-section alignment),)
 305         CPU_LDFLAGS-y += -Wl,--sort-section,alignment
 306 endif
 307
 308         CPU_LDFLAGS-y+=-m32
 309         CPU_CFLAGS-y+=-m32
 310         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
 311         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
 312         CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
 313         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
 314         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
 315         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
 316         CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
 317         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
 318         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
 319         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
 320         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
 321         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
 322         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
 323         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
 324         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
 325         CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
 326 endif
 327
 328 ifeq ($(TARGET_ARCH),sparc)
 329         CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
 330         CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
 331         CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
 332         CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
 333 endif
 334
 335 ifeq ($(TARGET_ARCH),arm)
 336         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 337         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 338         CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb
 339 endif
 340
 341 ifeq ($(TARGET_ARCH),mips)
 342         OPTIMIZATION+=-mno-split-addresses
 343         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
 344         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
 345         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
 346         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
 347         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
 348         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
 349         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
 350         ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
 351                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
 352                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
 353         endif
 354         ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
 355                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
 356                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
 357         endif
 358         CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
 359         CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
 360         CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
 361 endif
 362
 363 ifeq ($(TARGET_ARCH),nios)
 364         OPTIMIZATION+=-funaligned-struct-hack
 365         CPU_LDFLAGS-y+=-Wl,-m32
 366         CPU_CFLAGS-y+=-Wl,-m32
 367 endif
 368
 369 ifeq ($(TARGET_ARCH),sh)
 370         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 371         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
 372         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 373         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 374         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
 375 ifeq ($(UCLIBC_HAS_FPU),y)
 376         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
 377         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 378 else
 379         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
 380         CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
 381 endif
 382 endif
 383
 384 ifeq ($(TARGET_ARCH),sh64)
 385         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 386         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 387         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 388 endif
 389
 390 ifeq ($(TARGET_ARCH),h8300)
 391         SYMBOL_PREFIX=_
 392         CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
 393         CPU_LDFLAGS-$(CONFIG_H8S)   += -Wl,-ms8300s
 394         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
 395         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32
 396 endif
 397
 398 ifeq ($(TARGET_ARCH),i960)
 399         OPTIMIZATION+=-mh -mint32 #-fsigned-char
 400 endif
 401
 402 ifeq ($(TARGET_ARCH),e1)
 403         OPTIMIZATION+=-mgnu-param
 404 endif
 405
 406 ifeq ($(TARGET_ARCH),cris)
 407         CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
 408         CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
 409         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 410         PICFLAG:=-fpic
 411         PIEFLAG_NAME:=-fpie
 412 endif
 413
 414 ifeq ($(TARGET_ARCH),m68k)
 415         # -fPIC is only supported for 68020 and above.  It is not supported
 416         # for 68000, 68010, or Coldfire.
 417         PICFLAG:=-fpic
 418         PIEFLAG_NAME:=-fpie
 419 endif
 420
 421 ifeq ($(TARGET_ARCH),powerpc)
 422 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
 423 # enough. Therefore use -fpic which will reduce code size and generates
 424 # faster code.
 425         PICFLAG:=-fpic
 426         PIEFLAG_NAME:=-fpie
 427         PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null -  2> /dev/null && echo -n y || echo -n n)
 428         CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
 429         CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
 430
 431 endif
 432
 433 ifeq ($(TARGET_ARCH),bfin)
 434         SYMBOL_PREFIX=_
 435 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
 436         CPU_CFLAGS-y:=-mfdpic
 437         CPU_LDFLAGS-y += -Wl,-melf32bfinfd
 438         PICFLAG:=-fpic
 439         PIEFLAG_NAME:=-fpie
 440 endif
 441 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
 442         PICFLAG := -mleaf-id-shared-library
 443 endif
 444 endif
 445
 446 ifeq ($(TARGET_ARCH),frv)
 447         CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
 448         # Using -pie causes the program to have an interpreter, which is
 449         # forbidden, so we must make do with -shared.  Unfortunately,
 450         # -shared by itself would get us global function descriptors
 451         # and calls through PLTs, dynamic resolution of symbols, etc,
 452         # which would break as well, but -Bsymbolic comes to the rescue.
 453         export LDPIEFLAG:=-shared -Wl,-Bsymbolic
 454         UCLIBC_LDSO=ld.so.1
 455 endif
 456
 457 ifeq ($(strip $(TARGET_ARCH)),avr32)
 458        CPU_CFLAGS-$(CONFIG_AVR32_AP7)  += -march=ap
 459        CPU_CFLAGS-$(CONFIG_LINKRELAX)  += -mrelax
 460        CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
 461 endif
 462
 463 ifeq ($(TARGET_ARCH),i960)
 464       SYMBOL_PREFIX=_
 465 endif
 466
 467 ifeq ($(TARGET_ARCH),v850)
 468       SYMBOL_PREFIX=_
 469 endif
 470
 471 ifeq ($(TARGET_ARCH),c6x)
 472         PIEFLAG:=
 473         CPU_CFLAGS-$(CONFIG_TMS320C64X) += -march=c64x
 474         CPU_CFLAGS-$(CONFIG_TMS320C64XPLUS) += -march=c64x+
 475         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 476         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 477         CPU_LDFLAGS-y += $(CPU_CFLAGS)
 478 endif
 479
 480 # Keep the check_gcc from being needlessly executed
 481 ifndef PIEFLAG
 482 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
 483 endif
 484 # We need to keep track of both the CC PIE flag (above) as
 485 # well as the LD PIE flag (below) because we can't rely on
 486 # gcc passing -pie if we used -fPIE. We need to directly use -pie
 487 # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
 488 ifndef LDPIEFLAG
 489 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")
 490 endif
 491
 492 # Check for --as-needed support in linker
 493 ifndef LD_FLAG_ASNEEDED
 494 _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
 495 ifneq ($(_LD_FLAG_ASNEEDED),)
 496 export LD_FLAG_ASNEEDED:=--as-needed
 497 endif
 498 endif
 499 ifndef LD_FLAG_NO_ASNEEDED
 500 ifdef LD_FLAG_ASNEEDED
 501 export LD_FLAG_NO_ASNEEDED:=--no-as-needed
 502 endif
 503 endif
 504 ifndef CC_FLAG_ASNEEDED
 505 ifdef LD_FLAG_ASNEEDED
 506 export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
 507 endif
 508 endif
 509 ifndef CC_FLAG_NO_ASNEEDED
 510 ifdef LD_FLAG_NO_ASNEEDED
 511 export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
 512 endif
 513 endif
 514 link.asneeded = $(if $(findstring yy,$(CC_FLAG_ASNEEDED)$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
 515
 516 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
 517 ifndef ASNEEDED
 518 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
 519 ifeq ($(UCLIBC_HAS_BACKTRACE),y)
 520 # Only used in installed libc.so linker script
 521 UBACKTRACE_FULL_NAME := $(RUNTIME_PREFIX)lib/$(UBACKTRACE_DSO)
 522 export UBACKTRACE_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UBACKTRACE_FULL_NAME) )" || echo "$(UBACKTRACE_FULL_NAME)")
 523 else
 524 export UBACKTRACE_ASNEEDED:=""
 525 endif
 526 endif
 527
 528 # Add a bunch of extra pedantic annoyingly strict checks
 529 XWARNINGS=$(call qstrip,$(WARNINGS))
 530 XWARNINGS+=$(foreach w,\
 531         -Wstrict-prototypes \
 532         -Wstrict-aliasing \
 533         , $(call check_gcc,$(w),))
 534 ifeq ($(EXTRA_WARNINGS),y)
 535 XWARNINGS+=$(foreach w,\
 536         -Wformat=2 \
 537         -Wmissing-noreturn \
 538         -Wmissing-format-attribute \
 539         -Wmissing-prototypes \
 540         -Wmissing-declarations \
 541         -Wnested-externs \
 542         -Wnonnull \
 543         -Wold-style-declaration \
 544         -Wold-style-definition \
 545         -Wshadow \
 546         -Wundef \
 547         , $(call check_gcc,$(w),))
 548 # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
 549 #XWARNINGS+=-Wdeclaration-after-statement
 550 endif
 551 CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
 552
 553 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
 554 ifeq ($(UCLIBC_BUILD_SSP),y)
 555 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
 556 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
 557 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
 558 else
 559 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
 560 endif
 561
 562 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
 563
 564 # Collect all CFLAGS components
 565 CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
 566         $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
 567         -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
 568         -I$(top_srcdir)libc/sysdeps/linux \
 569         -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
 570
 571 # We need this to be checked within libc-symbols.h
 572 ifneq ($(HAVE_SHARED),y)
 573 CFLAGS += -DSTATIC
 574 endif
 575
 576 LDFLAG_WARN_ONCE:=$(if $(call check_ld,--warn-once),-Wl$(comma)--warn-once)
 577 LDFLAG_SORT_COMMON:=$(if $(call check_ld,--sort-common),-Wl$(comma)--sort-common)
 578 LDFLAG_DISCARD_ALL:=$(if $(call check_ld,--discard-all),-Wl$(comma)--discard-all)
 579 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
 580         -Wl,--warn-common $(LDFLAG_WARN_ONCE) -Wl,-z,combreloc
 581 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
 582 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
 583
 584 ifeq ($(UCLIBC_BUILD_RELRO),y)
 585 LDFLAGS_NOSTRIP+=-Wl,-z,relro
 586 endif
 587
 588 ifeq ($(UCLIBC_BUILD_NOW),y)
 589 LDFLAGS_NOSTRIP+=-Wl,-z,now
 590 endif
 591
 592 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
 593 # Be sure that binutils support it
 594 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
 595 ifeq ($(LDFLAGS_GNUHASH),)
 596 ifneq ($(filter-out $(clean_targets) install_headers headers-y,$(MAKECMDGOALS)),)
 597 $(error Your binutils do not support --hash-style option, while you want to use it)
 598 endif
 599 else
 600 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
 601 endif
 602 endif
 603
 604 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
 605 ifeq ($(DODEBUG),y)
 606 CFLAGS += -O0 -g3 -DDEBUG
 607 else
 608 CFLAGS += $(OPTIMIZATION)
 609 endif
 610 ifeq ($(DOSTRIP),y)
 611 LDFLAGS += -Wl,-s
 612 else
 613 STRIPTOOL := true -Stripping_disabled
 614 endif
 615 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
 616 CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
 617 endif
 618
 619 ifeq ($(DOMULTI),y)
 620 # we try to compile all sources at once into an object (IMA), but
 621 # gcc-3.3.x does not support it
 622 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
 623 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
 624 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
 625 ifeq ($(GCC_MAJOR_VER),3)
 626 DOMULTI:=n
 627 else
 628 CFLAGS+=$(call check_gcc,--combine,)
 629 endif
 630 else
 631 DOMULTI:=n
 632 endif
 633
 634 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
 635 LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
 636 endif
 637
 638 ifeq ($(UCLIBC_HAS_THREADS),y)
 639 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 640         PTNAME := nptl
 641         CFLAGS += -DHAVE_FORCED_UNWIND
 642 else
 643 ifeq ($(LINUXTHREADS_OLD),y)
 644         PTNAME := linuxthreads.old
 645 else
 646         PTNAME := linuxthreads
 647 endif
 648 endif
 649 PTDIR := libpthread/$(PTNAME)
 650 # set up system dependencies include dirs (NOTE: order matters!)
 651 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 652 PTINC:= -I$(top_builddir)$(PTDIR)                                       \
 653         -I$(top_srcdir)$(PTDIR)                                         \
 654         $(if $(TARGET_ARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
 655         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)  \
 656         -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                \
 657         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                  \
 658         -I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux               \
 659         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux                 \
 660         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread                         \
 661         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits                    \
 662         -I$(top_srcdir)$(PTDIR)/sysdeps/generic                         \
 663         -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH)                         \
 664         -I$(top_srcdir)ldso/include
 665 #
 666 # Test for TLS if NPTL support was selected.
 667 #
 668 GCC_HAS_TLS=$(shell \
 669         echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
 670 ifneq ($(GCC_HAS_TLS),)
 671 gcc_tls_test_fail:
 672         @echo "####";
 673         @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
 674         @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
 675         @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
 676         @echo "#### about this problem.";
 677         @echo "####";
 678         @echo "#### Exiting...";
 679         @echo "####";
 680         @exit 1;
 681 endif
 682 else
 683 PTINC := \
 684         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
 685         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
 686         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
 687         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
 688         -I$(top_srcdir)$(PTDIR) \
 689         -I$(top_srcdir)libpthread
 690 endif
 691 CFLAGS+=$(PTINC)
 692 else
 693         PTNAME :=
 694         PTINC  :=
 695 endif
 696 CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
 697 CFLAGS += -I$(KERNEL_HEADERS)
 698
 699 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
 700 CC_IPREFIX := $(shell $(CC) --print-file-name=include)
 701 CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
 702 CFLAGS += $(CC_INC)
 703
 704 ifneq ($(DOASSERTS),y)
 705 CFLAGS+=-DNDEBUG
 706 endif
 707
 708 ifeq ($(SYMBOL_PREFIX),_)
 709 CFLAGS+=-D__UCLIBC_UNDERSCORES__
 710 endif
 711
 712 # Keep the check_as from being needlessly executed
 713 ifndef ASFLAGS_NOEXEC
 714 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
 715 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
 716 else
 717 export ASFLAGS_NOEXEC :=
 718 endif
 719 endif
 720 ASFLAGS = $(ASFLAGS_NOEXEC)
 721
 722 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 723 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 724 LIBGCC_DIR:=$(dir $(LIBGCC))
 725
 726 # moved from libpthread/linuxthreads
 727 ifeq ($(UCLIBC_CTOR_DTOR),y)
 728 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
 729 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
 730 endif
 731
 732 LOCAL_INSTALL_PATH := install_dir