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+=$(call check_gcc,-fomit-frame-pointer,)
 181
 182 ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
 183         # Non-SSE capable processor.
 184         # NB: this may make SSE insns segfault!
 185         # -O1 -march=pentium3, -Os -msse etc are known to be affected.
 186         # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
 187         # -m32 is needed if host is 64-bit
 188         OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
 189 else
 190         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
 191 endif
 192
 193         # Choice of alignment (please document why!)
 194         #  -falign-labels: in-line labels
 195         #  (reachable by normal code flow, aligning will insert nops
 196         #  which will be executed - may even make things slower)
 197         #  -falign-jumps: reachable only by a jump
 198         # Generic: no alignment at all (smallest code)
 199         GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
 200 ifeq ($(CONFIG_K7),y)
 201         # Align functions to four bytes, use default for jumps and loops (why?)
 202         GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
 203 endif
 204 ifeq ($(CONFIG_CRUSOE),y)
 205         # Use compiler's default for functions, jumps and loops (why?)
 206         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 207 endif
 208 ifeq ($(CONFIG_CYRIXIII),y)
 209         # Use compiler's default for functions, jumps and loops (why?)
 210         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 211 endif
 212         OPTIMIZATION+=$(GCC_FALIGN)
 213
 214         # Putting each function and data object into its own section
 215         # allows for kbytes of less text if users link against static uclibc
 216         # using ld --gc-sections.
 217         # ld 2.18 can't do that (yet?) for shared libraries, so we itself
 218         # do not use --gc-sections at shared lib link time.
 219         # However, in combination with sections being sorted by alignment
 220         # it does result in much reduced padding:
 221         #   text    data     bss     dec     hex
 222         # 235319    1472    5992  242783   3b45f old.so
 223         # 234104    1472    5980  241556   3af94 new.so
 224         # Without -ffunction-sections, all functions will get aligned
 225         # to 4 byte boundary by as/ld. This is arguably a bug in as.
 226         # It specifies 4 byte align for .text even if not told to do so:
 227         # Idx Name          Size      VMA       LMA       File off  Algn
 228         #   0 .text         xxxxxxxx  00000000  00000000  xxxxxxxx  2**2 <===!
 229         CPU_CFLAGS-y  += $(call check_gcc,-ffunction-sections -fdata-sections,)
 230 ifneq ($(call check_ld,--sort-common,),)
 231         CPU_LDFLAGS-y += -Wl,--sort-common
 232 endif
 233 ifneq ($(call check_ld,--sort-section alignment),)
 234         CPU_LDFLAGS-y += -Wl,--sort-section,alignment
 235 endif
 236
 237         CPU_LDFLAGS-y+=-m32
 238         CPU_CFLAGS-y+=-m32
 239         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
 240         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
 241         CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
 242         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
 243         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
 244         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
 245         CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
 246         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
 247         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
 248         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
 249         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
 250         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
 251         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
 252         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
 253         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
 254         CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
 255 endif
 256
 257 ifeq ($(TARGET_ARCH),sparc)
 258         CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
 259         CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
 260         CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
 261         CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
 262 endif
 263
 264 ifeq ($(TARGET_ARCH),arm)
 265         OPTIMIZATION+=-fstrict-aliasing
 266         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 267         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 268         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 269         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 270         CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
 271         CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
 272         CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
 273         CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
 274         CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
 275         CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
 276         CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
 277         CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
 278         CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
 279         CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
 280         CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
 281         CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
 282         CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
 283         CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
 284         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
 285         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
 286         CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
 287         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
 288         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
 289 endif
 290
 291 ifeq ($(TARGET_ARCH),mips)
 292         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 293         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 294         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
 295         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
 296         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
 297         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
 298         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
 299         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
 300         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
 301         ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
 302                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
 303                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
 304         endif
 305         ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
 306                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
 307                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
 308         endif
 309         CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
 310         CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
 311         CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
 312 endif
 313
 314 ifeq ($(TARGET_ARCH),nios)
 315         CPU_LDFLAGS-y+=-Wl,-m32
 316         CPU_CFLAGS-y+=-Wl,-m32
 317 endif
 318
 319 ifeq ($(TARGET_ARCH),sh)
 320         OPTIMIZATION+=-fstrict-aliasing
 321         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 322         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 323         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 324         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
 325         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 326         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 327         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
 328 ifeq ($(UCLIBC_HAS_FLOATS),y)
 329         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
 330         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 331 else
 332         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
 333         CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
 334 endif
 335 endif
 336
 337 ifeq ($(TARGET_ARCH),sh64)
 338         OPTIMIZATION+=-fstrict-aliasing
 339         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-Wl,-EL
 340         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-Wl,-EB
 341         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 342         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 343         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 344 endif
 345
 346 ifeq ($(TARGET_ARCH),h8300)
 347         SYMBOL_PREFIX=_
 348         CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
 349         CPU_LDFLAGS-$(CONFIG_H8S)   += -Wl,-ms8300s
 350         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
 351         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32
 352 endif
 353
 354 ifeq ($(TARGET_ARCH),cris)
 355         CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
 356         CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
 357         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 358         PICFLAG:=-fpic
 359         PIEFLAG_NAME:=-fpie
 360 endif
 361
 362 ifeq ($(TARGET_ARCH),m68k)
 363         # -fPIC is only supported for 68020 and above.  It is not supported
 364         # for 68000, 68010, or Coldfire.
 365         PICFLAG:=-fpic
 366         PIEFLAG_NAME:=-fpie
 367 endif
 368
 369 ifeq ($(TARGET_ARCH),powerpc)
 370 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
 371 # enough. Therefore use -fpic which will reduce code size and generates
 372 # faster code.
 373         PICFLAG:=-fpic
 374         PIEFLAG_NAME:=-fpie
 375         PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null -  2> /dev/null && echo -n y || echo -n n)
 376         CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
 377         CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
 378
 379 endif
 380
 381 ifeq ($(TARGET_ARCH),bfin)
 382         SYMBOL_PREFIX=_
 383 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
 384         CPU_CFLAGS-y:=-mfdpic
 385         CPU_LDFLAGS-y += -Wl,-melf32bfinfd
 386         PICFLAG:=-fpic
 387         PIEFLAG_NAME:=-fpie
 388 endif
 389 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
 390         PICFLAG := -mleaf-id-shared-library
 391 endif
 392 endif
 393
 394 ifeq ($(TARGET_ARCH),frv)
 395         CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
 396         # Using -pie causes the program to have an interpreter, which is
 397         # forbidden, so we must make do with -shared.  Unfortunately,
 398         # -shared by itself would get us global function descriptors
 399         # and calls through PLTs, dynamic resolution of symbols, etc,
 400         # which would break as well, but -Bsymbolic comes to the rescue.
 401         export LDPIEFLAG:=-Wl,-shared -Wl,-Bsymbolic
 402         UCLIBC_LDSO=ld.so.1
 403 endif
 404
 405 ifeq ($(strip $(TARGET_ARCH)),avr32)
 406        CPU_CFLAGS-$(CONFIG_AVR32_AP7)  += -march=ap
 407        CPU_CFLAGS-$(CONFIG_LINKRELAX)  += -mrelax
 408        CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
 409 endif
 410
 411 ifeq ($(TARGET_ARCH),i960)
 412       SYMBOL_PREFIX=_
 413 endif
 414
 415 ifeq ($(TARGET_ARCH),microblaze)
 416       SYMBOL_PREFIX=_
 417 endif
 418
 419 ifeq ($(TARGET_ARCH),v850)
 420       SYMBOL_PREFIX=_
 421 endif
 422
 423 # Keep the check_gcc from being needlessly executed
 424 ifndef PIEFLAG
 425 ifneq ($(UCLIBC_BUILD_PIE),y)
 426 export PIEFLAG:=
 427 else
 428 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
 429 endif
 430 endif
 431 # We need to keep track of both the CC PIE flag (above) as
 432 # well as the LD PIE flag (below) because we can't rely on
 433 # gcc passing -pie if we used -fPIE
 434 ifndef LDPIEFLAG
 435 ifneq ($(UCLIBC_BUILD_PIE),y)
 436 export LDPIEFLAG:=
 437 else
 438 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
 439 endif
 440 endif
 441
 442 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
 443 ifndef ASNEEDED
 444 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
 445 endif
 446
 447 # Add a bunch of extra pedantic annoyingly strict checks
 448 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
 449 ifeq ($(EXTRA_WARNINGS),y)
 450 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
 451 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
 452 XWARNINGS+=-Wnonnull -Wundef
 453 # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
 454 #XWARNINGS+=-Wdeclaration-after-statement
 455 endif
 456 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
 457 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
 458
 459 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
 460 ifeq ($(UCLIBC_BUILD_SSP),y)
 461 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
 462 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
 463 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
 464 else
 465 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
 466 endif
 467
 468 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
 469 # Some nice CFLAGS to work with
 470 CFLAGS := -include $(top_builddir)include/libc-symbols.h \
 471         $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
 472         -fno-builtin -nostdinc -I$(top_builddir)include -I. \
 473         -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
 474
 475 # Make sure that we can be built with non-C99 compilers, too.
 476 # Use __\1__ instead.
 477 CFLAGS += $(call check_gcc,-fno-asm,)
 478 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
 479 CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
 480 endif
 481
 482 LDADD_LIBFLOAT=
 483 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 484 # If -msoft-float isn't supported, we want an error anyway.
 485 # Hmm... might need to revisit this for arm since it has 2 different
 486 # soft float encodings.
 487 ifneq ($(TARGET_ARCH),nios)
 488 ifneq ($(TARGET_ARCH),nios2)
 489 ifneq ($(TARGET_ARCH),sh)
 490 CFLAGS += -msoft-float
 491 endif
 492 endif
 493 endif
 494 ifeq ($(TARGET_ARCH),arm)
 495 # No longer needed with current toolchains, but leave it here for now.
 496 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
 497 #    LDADD_LIBFLOAT=-lfloat
 498 endif
 499 endif
 500
 501 # Please let us see private headers' parts
 502 CFLAGS += -DUCLIBC_INTERNAL
 503
 504 # We need this to be checked within libc-symbols.h
 505 ifneq ($(HAVE_SHARED),y)
 506 CFLAGS += -DSTATIC
 507 endif
 508
 509 CFLAGS += $(call check_gcc,-std=gnu99,)
 510
 511 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -Wl,-shared \
 512         -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc
 513 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
 514 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
 515
 516 ifeq ($(UCLIBC_BUILD_RELRO),y)
 517 LDFLAGS_NOSTRIP+=-Wl,-z,relro
 518 endif
 519
 520 ifeq ($(UCLIBC_BUILD_NOW),y)
 521 LDFLAGS_NOSTRIP+=-Wl,-z,now
 522 endif
 523
 524 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
 525 # Be sure that binutils support it
 526 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
 527 ifeq ($(LDFLAGS_GNUHASH),)
 528 $(error Your binutils don't support --hash-style option, while you want to use it)
 529 else
 530 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
 531 endif
 532 endif
 533
 534 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
 535 ifeq ($(DODEBUG),y)
 536 CFLAGS += -O0 -g3
 537 else
 538 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
 539 endif
 540 ifeq ($(DOSTRIP),y)
 541 LDFLAGS += -Wl,-s
 542 else
 543 STRIPTOOL := true -Stripping_disabled
 544 endif
 545
 546 ifeq ($(DOMULTI),y)
 547 # we try to compile all sources at once into an object (IMA), but
 548 # gcc-3.3.x does not support it
 549 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
 550 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
 551 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
 552 ifeq ($(GCC_MAJOR_VER),3)
 553 DOMULTI:=n
 554 else
 555 CFLAGS+=$(call check_gcc,--combine,)
 556 endif
 557 else
 558 DOMULTI:=n
 559 endif
 560
 561 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
 562 LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
 563 endif
 564
 565 ifeq ($(UCLIBC_HAS_THREADS),y)
 566 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 567         PTNAME := nptl
 568 else
 569 ifeq ($(LINUXTHREADS_OLD),y)
 570         PTNAME := linuxthreads.old
 571 else
 572         PTNAME := linuxthreads
 573 endif
 574 endif
 575 PTDIR := $(top_builddir)libpthread/$(PTNAME)
 576 # set up system dependencies include dirs (NOTE: order matters!)
 577 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 578 PTINC:= -I$(PTDIR)                                              \
 579         -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)       \
 580         -I$(PTDIR)/sysdeps/$(TARGET_ARCH)                       \
 581         -I$(PTDIR)/sysdeps/unix/sysv/linux                      \
 582         -I$(PTDIR)/sysdeps/pthread                              \
 583         -I$(PTDIR)/sysdeps/pthread/bits                         \
 584         -I$(PTDIR)/sysdeps/generic                              \
 585         -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH)                 \
 586         -I$(top_srcdir)ldso/include
 587 #
 588 # Test for TLS if NPTL support was selected.
 589 #
 590 GCC_HAS_TLS=$(shell \
 591         echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
 592 ifneq ($(GCC_HAS_TLS),)
 593 gcc_tls_test_fail:
 594         @echo "####";
 595         @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
 596         @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
 597         @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
 598         @echo "#### about this problem.";
 599         @echo "####";
 600         @echo "#### Exiting...";
 601         @echo "####";
 602         @exit 1;
 603 endif
 604 else
 605 PTINC := \
 606         -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
 607         -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
 608         -I$(PTDIR)/sysdeps/unix/sysv/linux \
 609         -I$(PTDIR)/sysdeps/pthread \
 610         -I$(PTDIR) \
 611         -I$(top_builddir)libpthread
 612 endif
 613 CFLAGS+=$(PTINC)
 614 else
 615         PTNAME :=
 616         PTINC  :=
 617 endif
 618 CFLAGS += -I$(KERNEL_HEADERS)
 619
 620 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
 621 CC_IPREFIX:=$(shell $(CC) --print-file-name=include)
 622 CFLAGS += -I$(dir $(CC_IPREFIX))/include-fixed -I$(CC_IPREFIX)
 623
 624 ifneq ($(DOASSERTS),y)
 625 CFLAGS+=-DNDEBUG
 626 endif
 627
 628 ifeq ($(SYMBOL_PREFIX),_)
 629 CFLAGS+=-D__UCLIBC_UNDERSCORES__
 630 endif
 631
 632 # Keep the check_as from being needlessly executed
 633 ifndef ASFLAGS_NOEXEC
 634 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
 635 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
 636 else
 637 export ASFLAGS_NOEXEC :=
 638 endif
 639 endif
 640 ASFLAGS = $(ASFLAGS_NOEXEC)
 641
 642 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 643 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 644 LIBGCC_DIR:=$(dir $(LIBGCC))
 645
 646 # moved from libpthread/linuxthreads
 647 ifeq ($(UCLIBC_CTOR_DTOR),y)
 648 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
 649 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
 650 endif
 651
 652 LOCAL_INSTALL_PATH := install_dir