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      := 32
 109 EXTRAVERSION  :=-git
 110 VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
 111 # no abi compat between sublevel releases yet, so we use full version
 112 # for soname
 113 ABI_VERSION   := $(VERSION)
 114 ifneq ($(EXTRAVERSION),)
 115 VERSION       := $(VERSION)$(EXTRAVERSION)
 116 endif
 117 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
 118 LC_ALL := C
 119 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL
 120
 121 LIBC := libc
 122 SHARED_LIBNAME := $(LIBC).so.$(ABI_VERSION)
 123
 124 ifneq ($(findstring  $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
 125 UCLIBC_LDSO_NAME := ld64-uClibc
 126 ARCH_NATIVE_BIT := 64
 127 else
 128 UCLIBC_LDSO_NAME := ld-uClibc
 129 ARCH_NATIVE_BIT := 32
 130 endif
 131 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION)
 132 NONSHARED_LIBNAME := uclibc_nonshared.a
 133 libc := $(top_builddir)lib/$(SHARED_LIBNAME)
 134 libc.depend := $(top_builddir)lib/$(SHARED_LIBNAME:.$(ABI_VERSION)=)
 135 libdl.depend := $(top_builddir)lib/libdl.so
 136 libpthread.depend := $(top_builddir)lib/libpthread.so
 137 interp := $(top_builddir)lib/interp.os
 138 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
 139 headers_dep := $(top_builddir)include/bits/sysnum.h
 140 sub_headers := $(headers_dep)
 141
 142 #LIBS :=$(interp) -L$(top_builddir)lib -lc
 143 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(ABI_VERSION)=)
 144
 145 # Make sure DESTDIR and PREFIX can be used to install
 146 # PREFIX is a uClibcism while DESTDIR is a common GNUism
 147 ifndef PREFIX
 148 PREFIX = $(DESTDIR)
 149 endif
 150
 151 ifneq ($(HAVE_SHARED),y)
 152 libc :=
 153 interp :=
 154 ldso :=
 155 endif
 156
 157 comma:=,
 158 space:= #
 159
 160 ifndef CROSS
 161 CROSS=$(call qstrip,$(CROSS_COMPILER_PREFIX))
 162 endif
 163
 164 # A nifty macro to make testing gcc features easier
 165 check_gcc=$(shell \
 166         if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
 167         then echo "$(1)"; else echo "$(2)"; fi)
 168 check_as=$(shell \
 169         if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
 170         then echo "-Wa,$(1)"; fi)
 171 check_ld=$(shell \
 172         if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
 173         then echo "$(1)"; fi)
 174
 175 ARFLAGS:=cr
 176
 177
 178 # Flags in OPTIMIZATION are used only for non-debug builds
 179
 180 OPTIMIZATION:=
 181 # Use '-Os' optimization if available, else use -O2, allow Config to override
 182 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 183 # Use the gcc 3.4 -funit-at-a-time optimization when available
 184 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
 185 # shrinks code by about 0.1%
 186 OPTIMIZATION+=$(call check_gcc,-fmerge-all-constants)
 187
 188 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
 189 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
 190
 191 ifeq ($(GCC_MAJOR_VER),4)
 192 # shrinks code, results are from 4.0.2
 193 # 0.36%
 194 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
 195 # 0.34%
 196 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
 197 # 0.1%
 198 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
 199 endif
 200
 201
 202 # CPU_CFLAGS-y contain options which are not warnings,
 203 # not include or library paths, and not optimizations.
 204
 205 # Why -funsigned-char: I hunted a bug related to incorrect
 206 # sign extension of 'char' type for 10 hours straight. Not fun.
 207 CPU_CFLAGS-y := -funsigned-char -fno-builtin
 208
 209 CPU_CFLAGS-y += $(call check_gcc,-fno-asm,)
 210
 211 LDADD_LIBFLOAT=
 212 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 213 # If -msoft-float isn't supported, we want an error anyway.
 214 # Hmm... might need to revisit this for arm since it has 2 different
 215 # soft float encodings.
 216 ifneq ($(TARGET_ARCH),nios)
 217 ifneq ($(TARGET_ARCH),nios2)
 218 ifneq ($(TARGET_ARCH),sh)
 219 CPU_CFLAGS-y += -msoft-float
 220 endif
 221 endif
 222 endif
 223 ifeq ($(TARGET_ARCH),arm)
 224 # No longer needed with current toolchains, but leave it here for now.
 225 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
 226 #    LDADD_LIBFLOAT=-lfloat
 227 endif
 228 endif
 229
 230 CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,)
 231
 232 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
 233 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
 234
 235 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
 236 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)    += -Wl,-EB
 237
 238 PICFLAG-y := -fPIC
 239 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
 240 PICFLAG := $(PICFLAG-y)
 241 PIEFLAG_NAME:=-fPIE
 242
 243 # Some nice CPU specific optimizations
 244 ifeq ($(TARGET_ARCH),i386)
 245         OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
 246
 247 ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
 248         # Non-SSE capable processor.
 249         # NB: this may make SSE insns segfault!
 250         # -O1 -march=pentium3, -Os -msse etc are known to be affected.
 251         # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
 252         # -m32 is needed if host is 64-bit
 253         OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
 254 else
 255         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
 256 endif
 257
 258         # Choice of alignment (please document why!)
 259         #  -falign-labels: in-line labels
 260         #  (reachable by normal code flow, aligning will insert nops
 261         #  which will be executed - may even make things slower)
 262         #  -falign-jumps: reachable only by a jump
 263         # Generic: no alignment at all (smallest code)
 264         GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
 265 ifeq ($(CONFIG_K7),y)
 266         # Align functions to four bytes, use default for jumps and loops (why?)
 267         GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
 268 endif
 269 ifeq ($(CONFIG_CRUSOE),y)
 270         # Use compiler's default for functions, jumps and loops (why?)
 271         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 272 endif
 273 ifeq ($(CONFIG_CYRIXIII),y)
 274         # Use compiler's default for functions, jumps and loops (why?)
 275         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 276 endif
 277         OPTIMIZATION+=$(GCC_FALIGN)
 278
 279         # Putting each function and data object into its own section
 280         # allows for kbytes of less text if users link against static uclibc
 281         # using ld --gc-sections.
 282         # ld 2.18 can't do that (yet?) for shared libraries, so we itself
 283         # do not use --gc-sections at shared lib link time.
 284         # However, in combination with sections being sorted by alignment
 285         # it does result in much reduced padding:
 286         #   text    data     bss     dec     hex
 287         # 235319    1472    5992  242783   3b45f old.so
 288         # 234104    1472    5980  241556   3af94 new.so
 289         # Without -ffunction-sections, all functions will get aligned
 290         # to 4 byte boundary by as/ld. This is arguably a bug in as.
 291         # It specifies 4 byte align for .text even if not told to do so:
 292         # Idx Name          Size      VMA       LMA       File off  Algn
 293         #   0 .text         xxxxxxxx  00000000  00000000  xxxxxxxx  2**2 <===!
 294         CPU_CFLAGS-y  += $(call check_gcc,-ffunction-sections -fdata-sections,)
 295 ifneq ($(call check_ld,--sort-common),)
 296         CPU_LDFLAGS-y += -Wl,--sort-common
 297 endif
 298 ifneq ($(call check_ld,--sort-section alignment),)
 299         CPU_LDFLAGS-y += -Wl,--sort-section,alignment
 300 endif
 301
 302         CPU_LDFLAGS-y+=-m32
 303         CPU_CFLAGS-y+=-m32
 304         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
 305         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
 306         CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
 307         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
 308         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
 309         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
 310         CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
 311         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
 312         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
 313         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
 314         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
 315         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
 316         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
 317         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
 318         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
 319         CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
 320 endif
 321
 322 ifeq ($(TARGET_ARCH),sparc)
 323         CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
 324         CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
 325         CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
 326         CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
 327 endif
 328
 329 ifeq ($(TARGET_ARCH),arm)
 330         OPTIMIZATION+=-fstrict-aliasing
 331         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 332         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 333         CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
 334         CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
 335         CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
 336         CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
 337         CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
 338         CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
 339         CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
 340         CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
 341         CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
 342         CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
 343         CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
 344         CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
 345         CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
 346         CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
 347         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
 348         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
 349         CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
 350         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
 351         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
 352 endif
 353
 354 ifeq ($(TARGET_ARCH),mips)
 355         OPTIMIZATIONS+=-mno-split-addresses
 356         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
 357         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
 358         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
 359         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
 360         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
 361         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
 362         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
 363         ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
 364                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
 365                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
 366         endif
 367         ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
 368                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
 369                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
 370         endif
 371         CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
 372         CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
 373         CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
 374 endif
 375
 376 ifeq ($(TARGET_ARCH),nios)
 377         OPTIMIZATIONS+=-funaligned-struct-hack
 378         CPU_LDFLAGS-y+=-Wl,-m32
 379         CPU_CFLAGS-y+=-Wl,-m32
 380 endif
 381
 382 ifeq ($(TARGET_ARCH),sh)
 383         OPTIMIZATION+=-fstrict-aliasing
 384         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 385         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
 386         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 387         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 388         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
 389 ifeq ($(UCLIBC_HAS_FPU),y)
 390         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
 391         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 392 else
 393         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
 394         CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
 395 endif
 396 endif
 397
 398 ifeq ($(TARGET_ARCH),sh64)
 399         OPTIMIZATION+=-fstrict-aliasing
 400         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 401         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 402         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 403 endif
 404
 405 ifeq ($(TARGET_ARCH),h8300)
 406         SYMBOL_PREFIX=_
 407         CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
 408         CPU_LDFLAGS-$(CONFIG_H8S)   += -Wl,-ms8300s
 409         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
 410         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32
 411 endif
 412
 413 ifeq ($(TARGET_ARCH),i960)
 414         OPTIMIZATIONS+=-mh -mint32 #-fsigned-char
 415 endif
 416
 417 ifeq ($(TARGET_ARCH),e1)
 418         OPTIMIZATIONS+=-mgnu-param
 419 endif
 420
 421 ifeq ($(TARGET_ARCH),cris)
 422         CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
 423         CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
 424         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 425         PICFLAG:=-fpic
 426         PIEFLAG_NAME:=-fpie
 427 endif
 428
 429 ifeq ($(TARGET_ARCH),m68k)
 430         # -fPIC is only supported for 68020 and above.  It is not supported
 431         # for 68000, 68010, or Coldfire.
 432         PICFLAG:=-fpic
 433         PIEFLAG_NAME:=-fpie
 434 endif
 435
 436 ifeq ($(TARGET_ARCH),powerpc)
 437 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
 438 # enough. Therefore use -fpic which will reduce code size and generates
 439 # faster code.
 440         PICFLAG:=-fpic
 441         PIEFLAG_NAME:=-fpie
 442         PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null -  2> /dev/null && echo -n y || echo -n n)
 443         CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
 444         CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
 445
 446 endif
 447
 448 ifeq ($(TARGET_ARCH),bfin)
 449         SYMBOL_PREFIX=_
 450 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
 451         CPU_CFLAGS-y:=-mfdpic
 452         CPU_LDFLAGS-y += -Wl,-melf32bfinfd
 453         PICFLAG:=-fpic
 454         PIEFLAG_NAME:=-fpie
 455 endif
 456 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
 457         PICFLAG := -mleaf-id-shared-library
 458 endif
 459 endif
 460
 461 ifeq ($(TARGET_ARCH),frv)
 462         CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
 463         # Using -pie causes the program to have an interpreter, which is
 464         # forbidden, so we must make do with -shared.  Unfortunately,
 465         # -shared by itself would get us global function descriptors
 466         # and calls through PLTs, dynamic resolution of symbols, etc,
 467         # which would break as well, but -Bsymbolic comes to the rescue.
 468         export LDPIEFLAG:=-shared -Wl,-Bsymbolic
 469         UCLIBC_LDSO=ld.so.1
 470 endif
 471
 472 ifeq ($(strip $(TARGET_ARCH)),avr32)
 473        CPU_CFLAGS-$(CONFIG_AVR32_AP7)  += -march=ap
 474        CPU_CFLAGS-$(CONFIG_LINKRELAX)  += -mrelax
 475        CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
 476 endif
 477
 478 ifeq ($(TARGET_ARCH),i960)
 479       SYMBOL_PREFIX=_
 480 endif
 481
 482 ifeq ($(TARGET_ARCH),microblaze)
 483       SYMBOL_PREFIX=_
 484 endif
 485
 486 ifeq ($(TARGET_ARCH),v850)
 487       SYMBOL_PREFIX=_
 488 endif
 489
 490 # Keep the check_gcc from being needlessly executed
 491 ifndef PIEFLAG
 492 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
 493 endif
 494 # We need to keep track of both the CC PIE flag (above) as
 495 # well as the LD PIE flag (below) because we can't rely on
 496 # gcc passing -pie if we used -fPIE. We need to directly use -pie
 497 # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
 498 ifndef LDPIEFLAG
 499 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")
 500 endif
 501
 502 # Check for --as-needed support in linker
 503 ifndef LD_FLAG_ASNEEDED
 504 _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
 505 ifneq ($(_LD_FLAG_ASNEEDED),)
 506 export LD_FLAG_ASNEEDED:=--as-needed
 507 endif
 508 endif
 509 ifndef LD_FLAG_NO_ASNEEDED
 510 ifdef LD_FLAG_ASNEEDED
 511 export LD_FLAG_NO_ASNEEDED:=--no-as-needed
 512 endif
 513 endif
 514 ifndef CC_FLAG_ASNEEDED
 515 ifdef LD_FLAG_ASNEEDED
 516 export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
 517 endif
 518 endif
 519 ifndef CC_FLAG_NO_ASNEEDED
 520 ifdef LD_FLAG_NO_ASNEEDED
 521 export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
 522 endif
 523 endif
 524 link.asneeded = $(if $(and $(CC_FLAG_ASNEEDED),$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
 525
 526 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
 527 ifndef ASNEEDED
 528 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
 529 endif
 530
 531 # Add a bunch of extra pedantic annoyingly strict checks
 532 XWARNINGS=$(call qstrip,$(WARNINGS)) -Wstrict-prototypes -fno-strict-aliasing
 533 ifeq ($(EXTRA_WARNINGS),y)
 534 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
 535 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
 536 XWARNINGS+=-Wold-style-declaration -Wold-style-definition
 537 XWARNINGS+=-Wnonnull -Wundef
 538 # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
 539 #XWARNINGS+=-Wdeclaration-after-statement
 540 endif
 541 CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
 542
 543 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
 544 ifeq ($(UCLIBC_BUILD_SSP),y)
 545 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
 546 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
 547 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
 548 else
 549 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
 550 endif
 551
 552 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
 553
 554 # Collect all CFLAGS components
 555 CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
 556         $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
 557         -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
 558         -I$(top_srcdir)libc/sysdeps/linux \
 559         -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
 560 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
 561 CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
 562 endif
 563
 564 # We need this to be checked within libc-symbols.h
 565 ifneq ($(HAVE_SHARED),y)
 566 CFLAGS += -DSTATIC
 567 endif
 568
 569 LDFLAG_WARN_ONCE:=$(if $(call check_ld,--warn-once),-Wl$(comma)--warn-once)
 570 LDFLAG_SORT_COMMON:=$(if $(call check_ld,--sort-common),-Wl$(comma)--sort-common)
 571 LDFLAG_DISCARD_ALL:=$(if $(call check_ld,--discard-all),-Wl$(comma)--discard-all)
 572 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
 573         -Wl,--warn-common $(LDFLAG_WARN_ONCE) -Wl,-z,combreloc
 574 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
 575 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
 576
 577 ifeq ($(UCLIBC_BUILD_RELRO),y)
 578 LDFLAGS_NOSTRIP+=-Wl,-z,relro
 579 endif
 580
 581 ifeq ($(UCLIBC_BUILD_NOW),y)
 582 LDFLAGS_NOSTRIP+=-Wl,-z,now
 583 endif
 584
 585 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
 586 # Be sure that binutils support it
 587 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
 588 ifeq ($(LDFLAGS_GNUHASH),)
 589 ifneq ($(filter-out install_headers headers-y,$(MAKECMDGOALS)),)
 590 $(error Your binutils do not support --hash-style option, while you want to use it)
 591 endif
 592 else
 593 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
 594 endif
 595 endif
 596
 597 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
 598 ifeq ($(DODEBUG),y)
 599 CFLAGS += -O0 -g3 -DDEBUG
 600 else
 601 CFLAGS += $(OPTIMIZATION)
 602 endif
 603 ifeq ($(DOSTRIP),y)
 604 LDFLAGS += -Wl,-s
 605 else
 606 STRIPTOOL := true -Stripping_disabled
 607 endif
 608
 609 ifeq ($(DOMULTI),y)
 610 # we try to compile all sources at once into an object (IMA), but
 611 # gcc-3.3.x does not support it
 612 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
 613 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
 614 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
 615 ifeq ($(GCC_MAJOR_VER),3)
 616 DOMULTI:=n
 617 else
 618 CFLAGS+=$(call check_gcc,--combine,)
 619 endif
 620 else
 621 DOMULTI:=n
 622 endif
 623
 624 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
 625 LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
 626 endif
 627
 628 ifeq ($(UCLIBC_HAS_THREADS),y)
 629 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 630         PTNAME := nptl
 631 else
 632 ifeq ($(LINUXTHREADS_OLD),y)
 633         PTNAME := linuxthreads.old
 634 else
 635         PTNAME := linuxthreads
 636 endif
 637 endif
 638 PTDIR := libpthread/$(PTNAME)
 639 # set up system dependencies include dirs (NOTE: order matters!)
 640 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 641 PTINC:= -I$(top_srcdir)$(PTDIR)                                         \
 642         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)        \
 643         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)  \
 644         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                  \
 645         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux                 \
 646         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread                         \
 647         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits                            \
 648         -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH)                 \
 649         -I$(top_srcdir)ldso/include
 650 #
 651 # Test for TLS if NPTL support was selected.
 652 #
 653 GCC_HAS_TLS=$(shell \
 654         echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
 655 ifneq ($(GCC_HAS_TLS),)
 656 gcc_tls_test_fail:
 657         @echo "####";
 658         @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
 659         @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
 660         @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
 661         @echo "#### about this problem.";
 662         @echo "####";
 663         @echo "#### Exiting...";
 664         @echo "####";
 665         @exit 1;
 666 endif
 667 else
 668 PTINC := \
 669         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
 670         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
 671         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
 672         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
 673         -I$(top_srcdir)$(PTDIR) \
 674         -I$(top_srcdir)libpthread
 675 endif
 676 CFLAGS+=$(PTINC)
 677 else
 678         PTNAME :=
 679         PTINC  :=
 680 endif
 681 CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
 682 CFLAGS += -I$(KERNEL_HEADERS)
 683
 684 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
 685 CC_IPREFIX := $(shell $(CC) --print-file-name=include)
 686 CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
 687 CFLAGS += $(CC_INC)
 688
 689 ifneq ($(DOASSERTS),y)
 690 CFLAGS+=-DNDEBUG
 691 endif
 692
 693 ifeq ($(SYMBOL_PREFIX),_)
 694 CFLAGS+=-D__UCLIBC_UNDERSCORES__
 695 endif
 696
 697 # Keep the check_as from being needlessly executed
 698 ifndef ASFLAGS_NOEXEC
 699 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
 700 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
 701 else
 702 export ASFLAGS_NOEXEC :=
 703 endif
 704 endif
 705 ASFLAGS = $(ASFLAGS_NOEXEC)
 706
 707 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 708 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 709 LIBGCC_DIR:=$(dir $(LIBGCC))
 710
 711 # moved from libpthread/linuxthreads
 712 ifeq ($(UCLIBC_CTOR_DTOR),y)
 713 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
 714 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
 715 endif
 716
 717 LOCAL_INSTALL_PATH := install_dir