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 KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(KERNEL_HEADERS)))))
 101 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
 102
 103
 104 # Now config hard core
 105 MAJOR_VERSION := 0
 106 MINOR_VERSION := 9
 107 SUBLEVEL      := 30
 108 EXTRAVERSION  :=-git
 109 VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
 110 ifneq ($(EXTRAVERSION),)
 111 VERSION       := $(VERSION)$(EXTRAVERSION)
 112 endif
 113 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
 114 LC_ALL := C
 115 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
 116
 117 LIBC := libc
 118 SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
 119 ifneq ($(findstring  $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
 120 UCLIBC_LDSO_NAME := ld64-uClibc
 121 ARCH_NATIVE_BIT := 64
 122 else
 123 UCLIBC_LDSO_NAME := ld-uClibc
 124 ARCH_NATIVE_BIT := 32
 125 endif
 126 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
 127 NONSHARED_LIBNAME := uclibc_nonshared.a
 128 libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
 129 libc.depend := $(top_builddir)lib/$(SHARED_MAJORNAME:.$(MAJOR_VERSION)=)
 130 interp := $(top_builddir)lib/interp.os
 131 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
 132 headers_dep := $(top_builddir)include/bits/sysnum.h
 133 sub_headers := $(headers_dep)
 134
 135 #LIBS :=$(interp) -L$(top_builddir)lib -lc
 136 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
 137
 138 # Make sure DESTDIR and PREFIX can be used to install
 139 # PREFIX is a uClibcism while DESTDIR is a common GNUism
 140 ifndef PREFIX
 141 PREFIX = $(DESTDIR)
 142 endif
 143
 144 ifneq ($(HAVE_SHARED),y)
 145 libc :=
 146 interp :=
 147 ldso :=
 148 endif
 149
 150 comma:=,
 151 space:= #
 152
 153 ifndef CROSS
 154 CROSS=$(call qstrip,$(CROSS_COMPILER_PREFIX))
 155 endif
 156
 157 # A nifty macro to make testing gcc features easier
 158 check_gcc=$(shell \
 159         if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
 160         then echo "$(1)"; else echo "$(2)"; fi)
 161 check_as=$(shell \
 162         if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
 163         then echo "-Wa,$(1)"; fi)
 164 check_ld=$(shell \
 165         if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
 166         then echo "$(1)"; fi)
 167
 168 ARFLAGS:=cr
 169
 170
 171 # Flags in OPTIMIZATION are used only for non-debug builds
 172
 173 OPTIMIZATION:=
 174 # Use '-Os' optimization if available, else use -O2, allow Config to override
 175 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 176 # Use the gcc 3.4 -funit-at-a-time optimization when available
 177 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
 178 # shrinks code by about 0.1%
 179 OPTIMIZATION+=$(call check_gcc,-fmerge-all-constants)
 180
 181 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
 182 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
 183
 184 ifeq ($(GCC_MAJOR_VER),4)
 185 # shrinks code, results are from 4.0.2
 186 # 0.36%
 187 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
 188 # 0.34%
 189 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
 190 # 0.1%
 191 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
 192 endif
 193
 194
 195 # CPU_CFLAGS-y contain options which are not warnings,
 196 # not include or library paths, and not optimizations.
 197
 198 # Why -funsigned-char: I hunted a bug related to incorrect
 199 # sign extension of 'char' type for 10 hours straight. Not fun.
 200 CPU_CFLAGS-y := -funsigned-char -fno-builtin
 201
 202 CPU_CFLAGS-y += $(call check_gcc,-fno-asm,)
 203
 204 LDADD_LIBFLOAT=
 205 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 206 # If -msoft-float isn't supported, we want an error anyway.
 207 # Hmm... might need to revisit this for arm since it has 2 different
 208 # soft float encodings.
 209 ifneq ($(TARGET_ARCH),nios)
 210 ifneq ($(TARGET_ARCH),nios2)
 211 ifneq ($(TARGET_ARCH),sh)
 212 CPU_CFLAGS-y += -msoft-float
 213 endif
 214 endif
 215 endif
 216 ifeq ($(TARGET_ARCH),arm)
 217 # No longer needed with current toolchains, but leave it here for now.
 218 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
 219 #    LDADD_LIBFLOAT=-lfloat
 220 endif
 221 endif
 222
 223 CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,)
 224
 225 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
 226 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
 227
 228 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
 229 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)    += -Wl,-EB
 230
 231 PICFLAG-y := -fPIC
 232 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
 233 PICFLAG := $(PICFLAG-y)
 234 PIEFLAG_NAME:=-fPIE
 235
 236 # Some nice CPU specific optimizations
 237 ifeq ($(TARGET_ARCH),i386)
 238         OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
 239
 240 ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
 241         # Non-SSE capable processor.
 242         # NB: this may make SSE insns segfault!
 243         # -O1 -march=pentium3, -Os -msse etc are known to be affected.
 244         # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
 245         # -m32 is needed if host is 64-bit
 246         OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
 247 else
 248         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
 249 endif
 250
 251         # Choice of alignment (please document why!)
 252         #  -falign-labels: in-line labels
 253         #  (reachable by normal code flow, aligning will insert nops
 254         #  which will be executed - may even make things slower)
 255         #  -falign-jumps: reachable only by a jump
 256         # Generic: no alignment at all (smallest code)
 257         GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
 258 ifeq ($(CONFIG_K7),y)
 259         # Align functions to four bytes, use default for jumps and loops (why?)
 260         GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
 261 endif
 262 ifeq ($(CONFIG_CRUSOE),y)
 263         # Use compiler's default for functions, jumps and loops (why?)
 264         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 265 endif
 266 ifeq ($(CONFIG_CYRIXIII),y)
 267         # Use compiler's default for functions, jumps and loops (why?)
 268         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 269 endif
 270         OPTIMIZATION+=$(GCC_FALIGN)
 271
 272         # Putting each function and data object into its own section
 273         # allows for kbytes of less text if users link against static uclibc
 274         # using ld --gc-sections.
 275         # ld 2.18 can't do that (yet?) for shared libraries, so we itself
 276         # do not use --gc-sections at shared lib link time.
 277         # However, in combination with sections being sorted by alignment
 278         # it does result in much reduced padding:
 279         #   text    data     bss     dec     hex
 280         # 235319    1472    5992  242783   3b45f old.so
 281         # 234104    1472    5980  241556   3af94 new.so
 282         # Without -ffunction-sections, all functions will get aligned
 283         # to 4 byte boundary by as/ld. This is arguably a bug in as.
 284         # It specifies 4 byte align for .text even if not told to do so:
 285         # Idx Name          Size      VMA       LMA       File off  Algn
 286         #   0 .text         xxxxxxxx  00000000  00000000  xxxxxxxx  2**2 <===!
 287         CPU_CFLAGS-y  += $(call check_gcc,-ffunction-sections -fdata-sections,)
 288 ifneq ($(call check_ld,--sort-common),)
 289         CPU_LDFLAGS-y += -Wl,--sort-common
 290 endif
 291 ifneq ($(call check_ld,--sort-section alignment),)
 292         CPU_LDFLAGS-y += -Wl,--sort-section,alignment
 293 endif
 294
 295         CPU_LDFLAGS-y+=-m32
 296         CPU_CFLAGS-y+=-m32
 297         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
 298         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
 299         CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
 300         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
 301         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
 302         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
 303         CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
 304         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
 305         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
 306         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
 307         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
 308         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
 309         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
 310         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
 311         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
 312         CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
 313 endif
 314
 315 ifeq ($(TARGET_ARCH),sparc)
 316         CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
 317         CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
 318         CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
 319         CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
 320 endif
 321
 322 ifeq ($(TARGET_ARCH),arm)
 323         OPTIMIZATION+=-fstrict-aliasing
 324         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 325         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 326         CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
 327         CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
 328         CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
 329         CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
 330         CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
 331         CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
 332         CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
 333         CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
 334         CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
 335         CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
 336         CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
 337         CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
 338         CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
 339         CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
 340         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
 341         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
 342         CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
 343         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
 344         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
 345 endif
 346
 347 ifeq ($(TARGET_ARCH),mips)
 348         OPTIMIZATIONS+=-mno-split-addresses
 349         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
 350         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
 351         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
 352         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
 353         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
 354         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
 355         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
 356         ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
 357                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
 358                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
 359         endif
 360         ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
 361                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
 362                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
 363         endif
 364         CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
 365         CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
 366         CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
 367 endif
 368
 369 ifeq ($(TARGET_ARCH),nios)
 370         OPTIMIZATIONS+=-funaligned-struct-hack
 371         CPU_LDFLAGS-y+=-Wl,-m32
 372         CPU_CFLAGS-y+=-Wl,-m32
 373 endif
 374
 375 ifeq ($(TARGET_ARCH),sh)
 376         OPTIMIZATION+=-fstrict-aliasing
 377         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 378         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
 379         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 380         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 381         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
 382 ifeq ($(UCLIBC_HAS_FPU),y)
 383         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
 384         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 385 else
 386         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
 387         CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
 388 endif
 389 endif
 390
 391 ifeq ($(TARGET_ARCH),sh64)
 392         OPTIMIZATION+=-fstrict-aliasing
 393         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 394         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 395         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 396 endif
 397
 398 ifeq ($(TARGET_ARCH),h8300)
 399         SYMBOL_PREFIX=_
 400         CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
 401         CPU_LDFLAGS-$(CONFIG_H8S)   += -Wl,-ms8300s
 402         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
 403         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32
 404 endif
 405
 406 ifeq ($(TARGET_ARCH),i960)
 407         OPTIMIZATIONS+=-mh -mint32 #-fsigned-char
 408 endif
 409
 410 ifeq ($(TARGET_ARCH),e1)
 411         OPTIMIZATIONS+=-mgnu-param
 412 endif
 413
 414 ifeq ($(TARGET_ARCH),cris)
 415         CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
 416         CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
 417         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 418         PICFLAG:=-fpic
 419         PIEFLAG_NAME:=-fpie
 420 endif
 421
 422 ifeq ($(TARGET_ARCH),m68k)
 423         # -fPIC is only supported for 68020 and above.  It is not supported
 424         # for 68000, 68010, or Coldfire.
 425         PICFLAG:=-fpic
 426         PIEFLAG_NAME:=-fpie
 427 endif
 428
 429 ifeq ($(TARGET_ARCH),powerpc)
 430 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
 431 # enough. Therefore use -fpic which will reduce code size and generates
 432 # faster code.
 433         PICFLAG:=-fpic
 434         PIEFLAG_NAME:=-fpie
 435         PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null -  2> /dev/null && echo -n y || echo -n n)
 436         CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
 437         CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
 438
 439 endif
 440
 441 ifeq ($(TARGET_ARCH),bfin)
 442         SYMBOL_PREFIX=_
 443 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
 444         CPU_CFLAGS-y:=-mfdpic
 445         CPU_LDFLAGS-y += -Wl,-melf32bfinfd
 446         PICFLAG:=-fpic
 447         PIEFLAG_NAME:=-fpie
 448 endif
 449 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
 450         PICFLAG := -mleaf-id-shared-library
 451 endif
 452 endif
 453
 454 ifeq ($(TARGET_ARCH),frv)
 455         CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
 456         # Using -pie causes the program to have an interpreter, which is
 457         # forbidden, so we must make do with -shared.  Unfortunately,
 458         # -shared by itself would get us global function descriptors
 459         # and calls through PLTs, dynamic resolution of symbols, etc,
 460         # which would break as well, but -Bsymbolic comes to the rescue.
 461         export LDPIEFLAG:=-shared -Wl,-Bsymbolic
 462         UCLIBC_LDSO=ld.so.1
 463 endif
 464
 465 ifeq ($(strip $(TARGET_ARCH)),avr32)
 466        CPU_CFLAGS-$(CONFIG_AVR32_AP7)  += -march=ap
 467        CPU_CFLAGS-$(CONFIG_LINKRELAX)  += -mrelax
 468        CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
 469 endif
 470
 471 ifeq ($(TARGET_ARCH),i960)
 472       SYMBOL_PREFIX=_
 473 endif
 474
 475 ifeq ($(TARGET_ARCH),microblaze)
 476       SYMBOL_PREFIX=_
 477 endif
 478
 479 ifeq ($(TARGET_ARCH),v850)
 480       SYMBOL_PREFIX=_
 481 endif
 482
 483 # Keep the check_gcc from being needlessly executed
 484 ifndef PIEFLAG
 485 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
 486 endif
 487 # We need to keep track of both the CC PIE flag (above) as
 488 # well as the LD PIE flag (below) because we can't rely on
 489 # gcc passing -pie if we used -fPIE. We need to directly use -pie
 490 # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
 491 ifndef LDPIEFLAG
 492 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")
 493 endif
 494
 495 # Check for --as-needed support in linker
 496 ifndef LD_FLAG_ASNEEDED
 497 _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
 498 ifneq ($(_LD_FLAG_ASNEEDED),)
 499 export LD_FLAG_ASNEEDED:=--as-needed
 500 endif
 501 endif
 502 ifndef LD_FLAG_NO_ASNEEDED
 503 ifdef LD_FLAG_ASNEEDED
 504 export LD_FLAG_NO_ASNEEDED:=--no-as-needed
 505 endif
 506 endif
 507 ifndef CC_FLAG_ASNEEDED
 508 ifdef LD_FLAG_ASNEEDED
 509 export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
 510 endif
 511 endif
 512 ifndef CC_FLAG_NO_ASNEEDED
 513 ifdef LD_FLAG_NO_ASNEEDED
 514 export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
 515 endif
 516 endif
 517 link.asneeded = $(if $(and $(CC_FLAG_ASNEEDED),$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
 518
 519 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
 520 ifndef ASNEEDED
 521 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
 522 endif
 523
 524 # Add a bunch of extra pedantic annoyingly strict checks
 525 XWARNINGS=$(call qstrip,$(WARNINGS)) -Wstrict-prototypes -fno-strict-aliasing
 526 ifeq ($(EXTRA_WARNINGS),y)
 527 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
 528 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
 529 XWARNINGS+=-Wold-style-declaration -Wold-style-definition
 530 XWARNINGS+=-Wnonnull -Wundef
 531 # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
 532 #XWARNINGS+=-Wdeclaration-after-statement
 533 endif
 534 CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
 535
 536 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
 537 ifeq ($(UCLIBC_BUILD_SSP),y)
 538 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
 539 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
 540 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
 541 else
 542 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
 543 endif
 544
 545 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
 546
 547 # Collect all CFLAGS components
 548 CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
 549         $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
 550         -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
 551         -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
 552 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
 553 CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
 554 endif
 555
 556 # We need this to be checked within libc-symbols.h
 557 ifneq ($(HAVE_SHARED),y)
 558 CFLAGS += -DSTATIC
 559 endif
 560
 561 LDFLAG_WARN_ONCE:=$(if $(call check_ld,--warn-once),-Wl$(comma)--warn-once)
 562 LDFLAG_SORT_COMMON:=$(if $(call check_ld,--sort-common),-Wl$(comma)--sort-common)
 563 LDFLAG_DISCARD_ALL:=$(if $(call check_ld,--discard-all),-Wl$(comma)--discard-all)
 564 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
 565         -Wl,--warn-common $(LDFLAG_WARN_ONCE) -Wl,-z,combreloc
 566 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
 567 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
 568
 569 ifeq ($(UCLIBC_BUILD_RELRO),y)
 570 LDFLAGS_NOSTRIP+=-Wl,-z,relro
 571 endif
 572
 573 ifeq ($(UCLIBC_BUILD_NOW),y)
 574 LDFLAGS_NOSTRIP+=-Wl,-z,now
 575 endif
 576
 577 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
 578 # Be sure that binutils support it
 579 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
 580 ifeq ($(LDFLAGS_GNUHASH),)
 581 ifneq ($(filter-out install_headers headers-y,$(MAKECMDGOALS)),)
 582 $(error Your binutils do not support --hash-style option, while you want to use it)
 583 endif
 584 else
 585 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
 586 endif
 587 endif
 588
 589 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
 590 ifeq ($(DODEBUG),y)
 591 CFLAGS += -O0 -g3 -DDEBUG
 592 else
 593 CFLAGS += $(OPTIMIZATION)
 594 endif
 595 ifeq ($(DOSTRIP),y)
 596 LDFLAGS += -Wl,-s
 597 else
 598 STRIPTOOL := true -Stripping_disabled
 599 endif
 600
 601 ifeq ($(DOMULTI),y)
 602 # we try to compile all sources at once into an object (IMA), but
 603 # gcc-3.3.x does not support it
 604 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
 605 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
 606 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
 607 ifeq ($(GCC_MAJOR_VER),3)
 608 DOMULTI:=n
 609 else
 610 CFLAGS+=$(call check_gcc,--combine,)
 611 endif
 612 else
 613 DOMULTI:=n
 614 endif
 615
 616 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
 617 LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
 618 endif
 619
 620 ifeq ($(UCLIBC_HAS_THREADS),y)
 621 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 622         PTNAME := nptl
 623 else
 624 ifeq ($(LINUXTHREADS_OLD),y)
 625         PTNAME := linuxthreads.old
 626 else
 627         PTNAME := linuxthreads
 628 endif
 629 endif
 630 PTDIR := libpthread/$(PTNAME)
 631 # set up system dependencies include dirs (NOTE: order matters!)
 632 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 633 PTINC:= -I$(top_srcdir)$(PTDIR)                                         \
 634         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)        \
 635         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)  \
 636         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                  \
 637         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux                 \
 638         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread                         \
 639         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits                            \
 640         -I$(top_srcdir)$(PTDIR)/sysdeps/generic                         \
 641         -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH)                 \
 642         -I$(top_srcdir)ldso/include
 643 #
 644 # Test for TLS if NPTL support was selected.
 645 #
 646 GCC_HAS_TLS=$(shell \
 647         echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
 648 ifneq ($(GCC_HAS_TLS),)
 649 gcc_tls_test_fail:
 650         @echo "####";
 651         @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
 652         @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
 653         @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
 654         @echo "#### about this problem.";
 655         @echo "####";
 656         @echo "#### Exiting...";
 657         @echo "####";
 658         @exit 1;
 659 endif
 660 else
 661 PTINC := \
 662         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
 663         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
 664         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
 665         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
 666         -I$(top_srcdir)$(PTDIR) \
 667         -I$(top_srcdir)libpthread
 668 endif
 669 CFLAGS+=$(PTINC)
 670 else
 671         PTNAME :=
 672         PTINC  :=
 673 endif
 674 CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
 675 CFLAGS += -I$(KERNEL_HEADERS)
 676
 677 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
 678 CC_IPREFIX := $(shell $(CC) --print-file-name=include)
 679 CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
 680 CFLAGS += $(CC_INC)
 681
 682 ifneq ($(DOASSERTS),y)
 683 CFLAGS+=-DNDEBUG
 684 endif
 685
 686 ifeq ($(SYMBOL_PREFIX),_)
 687 CFLAGS+=-D__UCLIBC_UNDERSCORES__
 688 endif
 689
 690 # Keep the check_as from being needlessly executed
 691 ifndef ASFLAGS_NOEXEC
 692 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
 693 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
 694 else
 695 export ASFLAGS_NOEXEC :=
 696 endif
 697 endif
 698 ASFLAGS = $(ASFLAGS_NOEXEC)
 699
 700 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 701 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 702 LIBGCC_DIR:=$(dir $(LIBGCC))
 703
 704 # moved from libpthread/linuxthreads
 705 ifeq ($(UCLIBC_CTOR_DTOR),y)
 706 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
 707 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
 708 endif
 709
 710 LOCAL_INSTALL_PATH := install_dir