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 # 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)
  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 SED        = sed
  45 AWK        = awk
  46
  47 STRIP_FLAGS ?= -x -R .note -R .comment
  48
  49 UNIFDEF := $(top_builddir)extra/scripts/unifdef -UUCLIBC_INTERNAL
  50
  51 # Select the compiler needed to build binaries for your development system
  52 HOSTCC     = gcc
  53 BUILD_CFLAGS = -O2 -Wall
  54 export ARCH := $(shell uname -m | $(SED) -e s/i.86/i386/ \
  55                                   -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
  56                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
  57                                   -e s/sh.*/sh/ \
  58                                   -e s/s390x/s390/ -e s/parisc.*/hppa/ \
  59                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  60                                   -e s/xtensa.*/xtensa/ )
  61
  62
  63 #---------------------------------------------------------
  64 # Nothing beyond this point should ever be touched by mere
  65 # mortals.  Unless you hang out with the gods, you should
  66 # probably leave all this stuff alone.
  67
  68 # Pull in the user's uClibc configuration
  69 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  70 -include $(top_builddir).config
  71 endif
  72
  73 # Make certain these contain a final "/", but no "//"s.
  74 TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_ARCH=//' -e 's/"//g')
  75 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
  76 TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_SUBARCH=//' -e 's/"//g')
  77 TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
  78 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  79 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  80 KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
  81 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
  82
  83
  84 # Now config hard core
  85 MAJOR_VERSION := 0
  86 MINOR_VERSION := 9
  87 SUBLEVEL      := 30
  88 EXTRAVERSION  :=-svn
  89 VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  90 ifneq ($(EXTRAVERSION),)
  91 VERSION       := $(VERSION)$(EXTRAVERSION)
  92 endif
  93 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  94 LC_ALL := C
  95 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  96
  97 LIBC := libc
  98 SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
  99 ifneq ($(findstring  $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
 100 UCLIBC_LDSO_NAME := ld64-uClibc
 101 ARCH_NATIVE_BIT := 64
 102 else
 103 UCLIBC_LDSO_NAME := ld-uClibc
 104 ARCH_NATIVE_BIT := 32
 105 endif
 106 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
 107 NONSHARED_LIBNAME := uclibc_nonshared.a
 108 libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
 109 libc.depend := $(top_builddir)lib/$(SHARED_MAJORNAME:.$(MAJOR_VERSION)=)
 110 interp := $(top_builddir)lib/interp.os
 111 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
 112 headers_dep := $(top_builddir)include/bits/sysnum.h
 113 sub_headers := $(headers_dep)
 114
 115 #LIBS :=$(interp) -L$(top_builddir)lib -lc
 116 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
 117
 118 # Make sure DESTDIR and PREFIX can be used to install
 119 # PREFIX is a uClibcism while DESTDIR is a common GNUism
 120 ifndef PREFIX
 121 PREFIX = $(DESTDIR)
 122 endif
 123
 124 ifneq ($(HAVE_SHARED),y)
 125 libc :=
 126 interp :=
 127 ldso :=
 128 endif
 129
 130 comma:=,
 131 space:= #
 132
 133 ifndef CROSS
 134 CROSS=$(strip $(subst ",, $(CROSS_COMPILER_PREFIX)))
 135 endif
 136
 137 # A nifty macro to make testing gcc features easier
 138 check_gcc=$(shell \
 139         if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
 140         then echo "$(1)"; else echo "$(2)"; fi)
 141 check_as=$(shell \
 142         if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
 143         then echo "-Wa,$(1)"; fi)
 144 check_ld=$(shell \
 145         if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
 146         then echo "$(1)"; fi)
 147
 148 ARFLAGS:=cr
 149
 150 # Flags in OPTIMIZATION are used only for non-debug builds
 151 OPTIMIZATION:=
 152 # Use '-Os' optimization if available, else use -O2, allow Config to override
 153 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 154 # Use the gcc 3.4 -funit-at-a-time optimization when available
 155 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
 156
 157 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
 158 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
 159
 160 ifeq ($(GCC_MAJOR_VER),4)
 161 # shrinks code, results are from 4.0.2
 162 # 0.36%
 163 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
 164 # 0.34%
 165 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
 166 # 0.1%
 167 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
 168 endif
 169
 170 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
 171 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
 172
 173 PICFLAG-y := -fPIC
 174 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
 175 PICFLAG := $(PICFLAG-y)
 176 PIEFLAG_NAME:=-fPIE
 177
 178 # Some nice CPU specific optimizations
 179 ifeq ($(TARGET_ARCH),i386)
 180         OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
 181
 182         # NB: this may make SSE insns segfault!
 183         # -O1 -march=pentium3, -Os -msse etc are known to be affected.
 184         # TODO: conditionally bump to 4
 185         # (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685)
 186         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
 187
 188         # Choice of alignment (please document why!)
 189         #  -falign-labels: in-line labels
 190         #  (reachable by normal code flow, aligning will insert nops
 191         #  which will be executed - may even make things slower)
 192         #  -falign-jumps: reachable only by a jump
 193         # Generic: no alignment at all (smallest code)
 194         GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
 195 ifeq ($(CONFIG_K7),y)
 196         # Align functions to four bytes, use default for jumps and loops (why?)
 197         GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
 198 endif
 199 ifeq ($(CONFIG_CRUSOE),y)
 200         # Use compiler's default for functions, jumps and loops (why?)
 201         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 202 endif
 203 ifeq ($(CONFIG_CYRIXIII),y)
 204         # Use compiler's default for functions, jumps and loops (why?)
 205         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 206 endif
 207         OPTIMIZATION+=$(GCC_FALIGN)
 208
 209         # Putting each function and data object into its own section
 210         # allows for kbytes of less text if users link against static uclibc
 211         # using ld --gc-sections.
 212         # ld 2.18 can't do that (yet?) for shared libraries, so we itself
 213         # do not use --gc-sections at shared lib link time.
 214         # However, in combination with sections being sorted by alignment
 215         # it does result in much reduced padding:
 216         #   text    data     bss     dec     hex
 217         # 235319    1472    5992  242783   3b45f old.so
 218         # 234104    1472    5980  241556   3af94 new.so
 219         # Without -ffunction-sections, all functions will get aligned
 220         # to 4 byte boundary by as/ld. This is arguably a bug in as.
 221         # It specifies 4 byte align for .text even if not told to do so:
 222         # Idx Name          Size      VMA       LMA       File off  Algn
 223         #   0 .text         xxxxxxxx  00000000  00000000  xxxxxxxx  2**2 <===!
 224         CPU_CFLAGS-y  += $(call check_gcc,-ffunction-sections -fdata-sections,)
 225 ifneq ($(call check_ld,--sort-common,),)
 226         CPU_LDFLAGS-y += -Wl,--sort-common
 227 endif
 228 ifneq ($(call check_ld,--sort-section alignment),)
 229         CPU_LDFLAGS-y += -Wl,--sort-section,alignment
 230 endif
 231
 232         CPU_LDFLAGS-y+=-m32
 233         CPU_CFLAGS-y+=-m32
 234         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
 235         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
 236         CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
 237         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
 238         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
 239         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
 240         CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
 241         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
 242         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
 243         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
 244         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
 245         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
 246         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
 247         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
 248         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
 249         CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
 250 endif
 251
 252 ifeq ($(TARGET_ARCH),sparc)
 253         CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
 254         CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
 255         CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
 256         CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
 257 endif
 258
 259 ifeq ($(TARGET_ARCH),arm)
 260         OPTIMIZATION+=-fstrict-aliasing
 261         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 262         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 263         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 264         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 265         CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
 266         CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
 267         CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
 268         CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
 269         CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
 270         CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
 271         CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
 272         CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
 273         CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
 274         CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
 275         CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
 276         CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
 277         CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
 278         CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
 279         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
 280         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
 281         CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
 282         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
 283         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
 284 endif
 285
 286 ifeq ($(TARGET_ARCH),mips)
 287         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 288         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 289         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
 290         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
 291         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
 292         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
 293         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
 294         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
 295         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
 296         ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
 297                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
 298                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
 299         endif
 300         ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
 301                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
 302                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
 303         endif
 304         CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
 305         CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
 306         CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
 307 endif
 308
 309 ifeq ($(TARGET_ARCH),nios)
 310         CPU_LDFLAGS-y+=-Wl,-m32
 311         CPU_CFLAGS-y+=-Wl,-m32
 312 endif
 313
 314 ifeq ($(TARGET_ARCH),sh)
 315         OPTIMIZATION+=-fstrict-aliasing
 316         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 317         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 318         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 319         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
 320         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 321         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 322         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
 323 ifeq ($(UCLIBC_HAS_FLOATS),y)
 324         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
 325         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 326 else
 327         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
 328         CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
 329 endif
 330 endif
 331
 332 ifeq ($(TARGET_ARCH),sh64)
 333         OPTIMIZATION+=-fstrict-aliasing
 334         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-Wl,-EL
 335         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-Wl,-EB
 336         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 337         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 338         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 339 endif
 340
 341 ifeq ($(TARGET_ARCH),h8300)
 342         SYMBOL_PREFIX=_
 343         CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
 344         CPU_LDFLAGS-$(CONFIG_H8S)   += -Wl,-ms8300s
 345         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
 346         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32
 347 endif
 348
 349 ifeq ($(TARGET_ARCH),cris)
 350         CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
 351         CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
 352         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 353         PICFLAG:=-fpic
 354         PIEFLAG_NAME:=-fpie
 355 endif
 356
 357 ifeq ($(TARGET_ARCH),m68k)
 358         # -fPIC is only supported for 68020 and above.  It is not supported
 359         # for 68000, 68010, or Coldfire.
 360         PICFLAG:=-fpic
 361         PIEFLAG_NAME:=-fpie
 362 endif
 363
 364 ifeq ($(TARGET_ARCH),powerpc)
 365 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
 366 # enough. Therefore use -fpic which will reduce code size and generates
 367 # faster code.
 368         PICFLAG:=-fpic
 369         PIEFLAG_NAME:=-fpie
 370         PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null -  2> /dev/null && echo -n y || echo -n n)
 371         CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
 372         CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
 373
 374 endif
 375
 376 ifeq ($(TARGET_ARCH),bfin)
 377         SYMBOL_PREFIX=_
 378 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
 379         CPU_CFLAGS-y:=-mfdpic
 380         CPU_LDFLAGS-y += -Wl,-melf32bfinfd
 381         PICFLAG:=-fpic
 382         PIEFLAG_NAME:=-fpie
 383 endif
 384 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
 385         PICFLAG := -mleaf-id-shared-library
 386 endif
 387 endif
 388
 389 ifeq ($(TARGET_ARCH),frv)
 390         CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
 391         # Using -pie causes the program to have an interpreter, which is
 392         # forbidden, so we must make do with -shared.  Unfortunately,
 393         # -shared by itself would get us global function descriptors
 394         # and calls through PLTs, dynamic resolution of symbols, etc,
 395         # which would break as well, but -Bsymbolic comes to the rescue.
 396         export LDPIEFLAG:=-Wl,-shared -Wl,-Bsymbolic
 397         UCLIBC_LDSO=ld.so.1
 398 endif
 399
 400 ifeq ($(strip $(TARGET_ARCH)),avr32)
 401        CPU_CFLAGS-$(CONFIG_AVR32_AP7)  += -march=ap
 402        CPU_CFLAGS-$(CONFIG_LINKRELAX)  += -mrelax
 403        CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
 404 endif
 405
 406 ifeq ($(TARGET_ARCH),i960)
 407       SYMBOL_PREFIX=_
 408 endif
 409
 410 ifeq ($(TARGET_ARCH),microblaze)
 411       SYMBOL_PREFIX=_
 412 endif
 413
 414 ifeq ($(TARGET_ARCH),v850)
 415       SYMBOL_PREFIX=_
 416 endif
 417
 418 # Keep the check_gcc from being needlessly executed
 419 ifndef PIEFLAG
 420 ifneq ($(UCLIBC_BUILD_PIE),y)
 421 export PIEFLAG:=
 422 else
 423 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
 424 endif
 425 endif
 426 # We need to keep track of both the CC PIE flag (above) as
 427 # well as the LD PIE flag (below) because we can't rely on
 428 # gcc passing -pie if we used -fPIE
 429 ifndef LDPIEFLAG
 430 ifneq ($(UCLIBC_BUILD_PIE),y)
 431 export LDPIEFLAG:=
 432 else
 433 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
 434 endif
 435 endif
 436
 437 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
 438 ifndef ASNEEDED
 439 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
 440 endif
 441
 442 # Add a bunch of extra pedantic annoyingly strict checks
 443 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
 444 ifeq ($(EXTRA_WARNINGS),y)
 445 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
 446 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
 447 XWARNINGS+=-Wnonnull -Wundef
 448 # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
 449 #XWARNINGS+=-Wdeclaration-after-statement
 450 endif
 451 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
 452 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
 453
 454 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
 455 ifeq ($(UCLIBC_BUILD_SSP),y)
 456 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
 457 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
 458 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
 459 else
 460 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
 461 endif
 462
 463 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
 464 # Some nice CFLAGS to work with
 465 CFLAGS := -include $(top_builddir)include/libc-symbols.h \
 466         $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
 467         -fno-builtin -nostdinc -I$(top_builddir)include -I. \
 468         -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
 469
 470 # Make sure that we can be built with non-C99 compilers, too.
 471 # Use __\1__ instead.
 472 CFLAGS += $(call check_gcc,-fno-asm,)
 473 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
 474 CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
 475 endif
 476
 477 LDADD_LIBFLOAT=
 478 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 479 # If -msoft-float isn't supported, we want an error anyway.
 480 # Hmm... might need to revisit this for arm since it has 2 different
 481 # soft float encodings.
 482 ifneq ($(TARGET_ARCH),nios)
 483 ifneq ($(TARGET_ARCH),nios2)
 484 ifneq ($(TARGET_ARCH),sh)
 485 CFLAGS += -msoft-float
 486 endif
 487 endif
 488 endif
 489 ifeq ($(TARGET_ARCH),arm)
 490 # No longer needed with current toolchains, but leave it here for now.
 491 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
 492 #    LDADD_LIBFLOAT=-lfloat
 493 endif
 494 endif
 495
 496 # Please let us see private headers' parts
 497 CFLAGS += -DUCLIBC_INTERNAL
 498
 499 # We need this to be checked within libc-symbols.h
 500 ifneq ($(HAVE_SHARED),y)
 501 CFLAGS += -DSTATIC
 502 endif
 503
 504 CFLAGS += $(call check_gcc,-std=gnu99,)
 505
 506 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -Wl,-shared \
 507         -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc
 508 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
 509 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
 510
 511 ifeq ($(UCLIBC_BUILD_RELRO),y)
 512 LDFLAGS_NOSTRIP+=-Wl,-z,relro
 513 endif
 514
 515 ifeq ($(UCLIBC_BUILD_NOW),y)
 516 LDFLAGS_NOSTRIP+=-Wl,-z,now
 517 endif
 518
 519 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
 520 # Be sure that binutils support it
 521 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
 522 ifeq ($(LDFLAGS_GNUHASH),)
 523 $(error Your binutils don't support --hash-style option, while you want to use it)
 524 else
 525 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
 526 endif
 527 endif
 528
 529 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
 530 ifeq ($(DODEBUG),y)
 531 CFLAGS += -O0 -g3
 532 else
 533 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
 534 endif
 535 ifeq ($(DOSTRIP),y)
 536 LDFLAGS += -Wl,-s
 537 else
 538 STRIPTOOL := true -Stripping_disabled
 539 endif
 540
 541 ifeq ($(DOMULTI),y)
 542 # we try to compile all sources at once into an object (IMA), but
 543 # gcc-3.3.x does not support it
 544 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
 545 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
 546 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
 547 ifeq ($(GCC_MAJOR_VER),3)
 548 DOMULTI:=n
 549 else
 550 CFLAGS+=$(call check_gcc,--combine,)
 551 endif
 552 else
 553 DOMULTI:=n
 554 endif
 555
 556 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
 557 LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
 558 endif
 559
 560 ifeq ($(UCLIBC_HAS_THREADS),y)
 561 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 562         PTNAME := nptl
 563 else
 564 ifeq ($(LINUXTHREADS_OLD),y)
 565         PTNAME := linuxthreads.old
 566 else
 567         PTNAME := linuxthreads
 568 endif
 569 endif
 570 PTDIR := $(top_builddir)libpthread/$(PTNAME)
 571 # set up system dependencies include dirs (NOTE: order matters!)
 572 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 573 PTINC:= -I$(PTDIR)                                              \
 574         -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)       \
 575         -I$(PTDIR)/sysdeps/$(TARGET_ARCH)                       \
 576         -I$(PTDIR)/sysdeps/unix/sysv/linux                      \
 577         -I$(PTDIR)/sysdeps/pthread                              \
 578         -I$(PTDIR)/sysdeps/pthread/bits                         \
 579         -I$(PTDIR)/sysdeps/generic                              \
 580         -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH)                 \
 581         -I$(top_srcdir)ldso/include
 582 #
 583 # Test for TLS if NPTL support was selected.
 584 #
 585 GCC_HAS_TLS=$(shell \
 586         echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
 587 ifneq ($(GCC_HAS_TLS),)
 588 gcc_tls_test_fail:
 589         @echo "####";
 590         @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
 591         @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
 592         @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
 593         @echo "#### about this problem.";
 594         @echo "####";
 595         @echo "#### Exiting...";
 596         @echo "####";
 597         @exit 1;
 598 endif
 599 else
 600 PTINC := \
 601         -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
 602         -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
 603         -I$(PTDIR)/sysdeps/unix/sysv/linux \
 604         -I$(PTDIR)/sysdeps/pthread \
 605         -I$(PTDIR) \
 606         -I$(top_builddir)libpthread
 607 endif
 608 CFLAGS+=$(PTINC)
 609 else
 610         PTNAME :=
 611         PTINC  :=
 612 endif
 613 CFLAGS += -I$(KERNEL_HEADERS)
 614
 615 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
 616 CC_IPREFIX:=$(shell $(CC) --print-file-name=include)
 617 CFLAGS += -I$(dir $(CC_IPREFIX))/include-fixed -I$(CC_IPREFIX)
 618
 619 ifneq ($(DOASSERTS),y)
 620 CFLAGS+=-DNDEBUG
 621 endif
 622
 623 ifeq ($(SYMBOL_PREFIX),_)
 624 CFLAGS+=-D__UCLIBC_UNDERSCORES__
 625 endif
 626
 627 # Keep the check_as from being needlessly executed
 628 ifndef ASFLAGS_NOEXEC
 629 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
 630 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
 631 else
 632 export ASFLAGS_NOEXEC :=
 633 endif
 634 endif
 635 ASFLAGS = $(ASFLAGS_NOEXEC)
 636
 637 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 638 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 639 LIBGCC_DIR:=$(dir $(LIBGCC))
 640
 641 # moved from libpthread/linuxthreads
 642 ifeq ($(UCLIBC_CTOR_DTOR),y)
 643 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
 644 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
 645 endif
 646
 647 LOCAL_INSTALL_PATH := install_dir