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 clean_targets := clean realclean distclean \
  31         objclean-y headers_clean-y CLEAN_utils
  32 noconfig_targets := menuconfig config nconfig \
  33         oldaskconfig silentoldconfig oldconfig allnoconfig allyesconfig \
  34         alldefconfig randconfig defconfig savedefconfig listnewconfig \
  35         olddefconfig \
  36         xconfig gconfig update-po-config mconf qconf gconf nconf conf \
  37         release dist tags help
  38
  39
  40 #-----------------------------------------------------------
  41 # If you are running a cross compiler, you will want to set
  42 # 'CROSS_COMPILE' to something more interesting ...  Target
  43 # architecture is determined by asking the CC compiler what
  44 # arch it compiles things for, so unless your compiler is
  45 # broken, you should not need to specify TARGET_ARCH.
  46 #
  47 # Most people will set this stuff on the command line, i.e.
  48 #        make CROSS_COMPILE=arm-linux-
  49 # will build uClibc for 'arm'.
  50 # CROSS is still supported for backward compatibily only
  51
  52 CROSS_COMPILE ?= $(CROSS)
  53
  54 CC         = $(CROSS_COMPILE)gcc
  55 AR         = $(CROSS_COMPILE)ar
  56 LD         = $(CROSS_COMPILE)ld
  57 NM         = $(CROSS_COMPILE)nm
  58 OBJDUMP    = $(CROSS_COMPILE)objdump
  59 STRIPTOOL  = $(CROSS_COMPILE)strip
  60
  61 INSTALL    = install
  62 LN         = ln
  63 RM         = rm -f
  64 TAR        = tar
  65 SED        = sed
  66 AWK        = awk
  67
  68 STRIP_FLAGS ?= -x -R .note -R .comment
  69
  70 ## unused? if yes, remove after 0.9.31
  71 ## UNIFDEF := $(top_builddir)extra/scripts/unifdef
  72
  73 # Select the compiler needed to build binaries for your development system
  74 HOSTCC     = gcc
  75 BUILD_CFLAGS = -Os
  76
  77 #---------------------------------------------------------
  78 # Nothing beyond this point should ever be touched by mere
  79 # mortals.  Unless you hang out with the gods, you should
  80 # probably leave all this stuff alone.
  81
  82 # strip quotes
  83 qstrip = $(strip $(subst ",,$(1)))
  84 #"))
  85
  86 # kconfig stuff
  87 KCONFIG_CONFIG ?= $(top_builddir).config
  88 KCONFIG_CONFIG := $(abspath $(KCONFIG_CONFIG))
  89 export KCONFIG_CONFIG
  90 KCONFIG_AUTOCONFIG := $(dir $(KCONFIG_CONFIG))include/config/auto.conf
  91 export KCONFIG_AUTOCONFIG
  92 KCONFIG_TRISTATE := $(dir $(KCONFIG_CONFIG))include/config/tristate.conf
  93 export KCONFIG_TRISTATE
  94 srctree := $(abspath $(top_srcdir))
  95 export srctree
  96 KCONFIG_AUTOHEADER := $(dir $(KCONFIG_CONFIG))include/generated/autoconf.h
  97 export KCONFIG_AUTOHEADER
  98 Kconfig := $(abspath $(top_srcdir)extra/Configs/Config.in)
  99
 100 # Pull in the user's uClibc configuration
 101 ifeq ($(filter $(noconfig_targets) clean CLEAN_%,$(MAKECMDGOALS)),)
 102 -include $(KCONFIG_CONFIG)
 103 endif
 104
 105 TARGET_ARCH:=$(call qstrip,$(TARGET_ARCH))
 106 ifeq ($(TARGET_ARCH),)
 107 ARCH ?= $(shell uname -m | $(SED) -e s/i.86/i386/ \
 108                                   -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
 109                                   -e s/arm.*/arm/ -e s/sa110/arm/ \
 110                                   -e s/sh.*/sh/ \
 111                                   -e s/s390x/s390/ -e s/parisc.*/hppa/ \
 112                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
 113                                   -e s/xtensa.*/xtensa/ )
 114 else
 115 ARCH = $(TARGET_ARCH)
 116 endif
 117 export ARCH
 118
 119 # Make certain these contain a final "/", but no "//"s.
 120 scrub_path = $(strip $(subst //,/, $(subst ,/, $(call qstrip,$(1)))))
 121 TARGET_SUBARCH := $(call qstrip,$(TARGET_SUBARCH))
 122 RUNTIME_PREFIX := $(call scrub_path,$(RUNTIME_PREFIX))
 123 DEVEL_PREFIX   := $(call scrub_path,$(DEVEL_PREFIX))
 124 MULTILIB_DIR   := $(call scrub_path,$(MULTILIB_DIR))
 125 KERNEL_HEADERS := $(call scrub_path,$(KERNEL_HEADERS))
 126 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
 127
 128
 129 # Now config hard core
 130 MAJOR_VERSION := 0
 131 MINOR_VERSION := 9
 132 SUBLEVEL      := 34
 133 EXTRAVERSION  :=-git
 134 VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
 135 ABI_VERSION   := $(MAJOR_VERSION)
 136 ifneq ($(EXTRAVERSION),)
 137 VERSION       := $(VERSION)$(EXTRAVERSION)
 138 endif
 139 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
 140 LC_ALL := C
 141 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL
 142
 143 LIBC := libc
 144 SHARED_LIBNAME := $(LIBC).so.$(ABI_VERSION)
 145 UBACKTRACE_DSO := libubacktrace.so.$(ABI_VERSION)
 146
 147 UCLIBC_LDSO_NAME := ld-uClibc
 148 ARCH_NATIVE_BIT := 32
 149 ifneq ($(findstring  $(TARGET_ARCH) , hppa64 ia64 powerpc64 s390x sparc64 x86_64 ),)
 150 UCLIBC_LDSO_NAME := ld64-uClibc
 151 ARCH_NATIVE_BIT := 64
 152 else
 153 ifeq ($(CONFIG_MIPS_N64_ABI),y)
 154 UCLIBC_LDSO_NAME := ld64-uClibc
 155 ARCH_NATIVE_BIT := 64
 156 endif
 157 endif
 158
 159 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION)
 160 NONSHARED_LIBNAME := uclibc_nonshared.a
 161 libc := $(top_builddir)lib/$(SHARED_LIBNAME)
 162 libc.depend := $(top_builddir)lib/$(SHARED_LIBNAME:.$(ABI_VERSION)=)
 163 ifneq ($(ARCH_HAS_NO_SHARED),y)
 164 libdl.depend := $(top_builddir)lib/libdl.so
 165 endif
 166 ifneq ($(HAS_NO_THREADS),y)
 167 libpthread.depend := $(top_builddir)lib/libpthread.so
 168 endif
 169 interp := $(top_builddir)lib/interp.os
 170 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
 171 headers_dep := $(top_builddir)include/bits/sysnum.h
 172 sub_headers := $(headers_dep)
 173
 174 #LIBS :=$(interp) -L$(top_builddir)lib -lc
 175 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(ABI_VERSION)=)
 176
 177 # Make sure DESTDIR and PREFIX can be used to install
 178 # PREFIX is a uClibcism while DESTDIR is a common GNUism
 179 ifndef PREFIX
 180 PREFIX = $(DESTDIR)
 181 endif
 182
 183 ifneq ($(HAVE_SHARED),y)
 184 libc :=
 185 interp :=
 186 ldso :=
 187 endif
 188
 189 comma:=,
 190 space:= #
 191
 192 ifeq ($(CROSS_COMPILE),)
 193 CROSS_COMPILE=$(call qstrip,$(CROSS_COMPILER_PREFIX))
 194 endif
 195
 196 # A nifty macro to make testing gcc features easier
 197 check_gcc=$(shell \
 198         if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
 199         then echo "$(1)"; else echo "$(2)"; fi)
 200 check_as=$(shell \
 201         if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
 202         then echo "-Wa,$(1)"; fi)
 203 check_ld=$(shell \
 204         if $(CC) $(LDFLAG-fuse-ld) $(CFLAG_-Wl--no-warn-mismatch) -Wl,$(1) $(CFLAG_-nostdlib) -o /dev/null -Wl,-b,binary /dev/null > /dev/null 2>&1; \
 205         then echo "$(1)"; fi)
 206
 207 # Use variable indirection here so that we can have variable
 208 # names with fun chars in them like equal signs
 209 define check-tool-var
 210 ifeq ($(filter $(clean_targets) CLEAN_%,$(MAKECMDGOALS)),)
 211 _v = $(2)_$(3)
 212 ifndef $$(_v)
 213 $$(_v) := $$(call $(1),$(subst %, ,$(3)))
 214 export $$(_v)
 215 endif
 216 endif
 217 endef
 218
 219 # Usage: check-gcc-var,<flag>
 220 # Check the C compiler to see if it supports <flag>.
 221 # Export the variable CFLAG_<flag> if it does.
 222 define check-gcc-var
 223 $(call check-tool-var,check_gcc,CFLAG,$(1))
 224 endef
 225 # Usage: check-as-var,<flag>
 226 # Check the assembler to see if it supports <flag>.  Export the
 227 # variable ASFLAG_<flag> if it does (for invoking the assembler),
 228 # as well CFLAG_-Wa<flag> (for invoking the compiler driver).
 229 define check-as-var
 230 $(call check-tool-var,check_as,ASFLAG,$(1))
 231 _v = CFLAG_-Wa$(1)
 232 export $$(_v) = $$(if $$(ASFLAG_$(1)),-Wa$$(comma)$$(ASFLAG_$(1)))
 233 endef
 234 # Usage: check-ld-var,<flag>
 235 # Check the linker to see if it supports <flag>.  Export the
 236 # variable LDFLAG_<flag> if it does (for invoking the linker),
 237 # as well CFLAG_-Wl<flag> (for invoking the compiler driver).
 238 define check-ld-var
 239 $(call check-tool-var,check_ld,LDFLAG,$(1))
 240 _v = CFLAG_-Wl$(1)
 241 export $$(_v) = $$(if $$(LDFLAG_$(1)),-Wl$$(comma)$$(LDFLAG_$(1)))
 242 endef
 243 # Usage: cache-output-var,<variable>,<shell command>
 244 # Execute <shell command> and cache the output in <variable>.
 245 define cache-output-var
 246 ifndef $(1)
 247 $(1) := $$(shell $(2))
 248 export $(1)
 249 endif
 250 endef
 251
 252
 253 ARFLAGS:=cr
 254
 255 # Note: The check for -nostdlib has to be before all calls to check_ld
 256 $(eval $(call check-gcc-var,-nostdlib))
 257 # deliberately not named CFLAG-fuse-ld since unchecked and from user
 258 LDFLAG-fuse-ld := $(filter -fuse-ld=%,$(call qstrip,$(UCLIBC_EXTRA_CFLAGS)))
 259 # failed to merge target specific data of file /dev/null
 260 # Could use -Wl,--script,$(top_srcdir)extra/scripts/none.lds as well.
 261 $(eval $(call check-ld-var,--no-warn-mismatch))
 262
 263 $(eval $(call cache-output-var,GCC_VER,$(CC) -dumpversion))
 264 GCC_VER := $(subst ., ,$(GCC_VER))
 265 GCC_MAJOR_VER ?= $(word 1,$(GCC_VER))
 266 GCC_MINOR_VER ?= $(word 2,$(GCC_VER))
 267
 268 # Flags in OPTIMIZATION are used only for non-debug builds
 269
 270 OPTIMIZATION:=
 271 OPTIMIZATION-$(GCC_MAJOR_VER):=
 272 OPTIMIZATION-$(GCC_MAJOR_VER).$(GCC_MINOR_VER):=
 273
 274 # Use '-Os' optimization if available, else use -O2, allow Config to override
 275 $(eval $(call check-gcc-var,-Os))
 276 ifneq ($(CFLAG_-Os),)
 277 OPTIMIZATION += $(CFLAG_-Os)
 278 else
 279 $(eval $(call check-gcc-var,-O2))
 280 OPTIMIZATION += $(CFLAG_-O2)
 281 endif
 282 # Use the gcc 3.4 -funit-at-a-time optimization when available
 283 $(eval $(call check-gcc-var,-funit-at-a-time))
 284 OPTIMIZATION-3.4 += $(CFLAG_-funit-at-a-time)
 285 $(eval $(call check-gcc-var,-fstrict-aliasing))
 286 OPTIMIZATION += $(CFLAG_-fstrict-aliasing)
 287
 288 # CPU_CFLAGS-y contain options which are not warnings,
 289 # not include or library paths, and not optimizations.
 290
 291 # Why -funsigned-char: I hunted a bug related to incorrect
 292 # sign extension of 'char' type for 10 hours straight. Not fun.
 293 CPU_CFLAGS-y := -funsigned-char -fno-builtin
 294
 295 $(eval $(call check-gcc-var,-fno-asm))
 296 CPU_CFLAGS-y += $(CFLAG_-fno-asm)
 297
 298 LDADD_LIBFLOAT=
 299 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 300 # If -msoft-float isn't supported, we want an error anyway.
 301 # Hmm... might need to revisit this for arm since it has 2 different
 302 # soft float encodings.
 303 ifneq ($(TARGET_ARCH),nios)
 304 ifneq ($(TARGET_ARCH),nios2)
 305 ifneq ($(TARGET_ARCH),sh)
 306 ifneq ($(TARGET_ARCH),c6x)
 307 CPU_CFLAGS-y += -msoft-float
 308 endif
 309 endif
 310 endif
 311 endif
 312 ifeq ($(TARGET_ARCH),arm)
 313 # No longer needed with current toolchains, but leave it here for now.
 314 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
 315 #    LDADD_LIBFLOAT=-lfloat
 316 endif
 317 endif
 318
 319 $(eval $(call check-gcc-var,-std=gnu99))
 320 CPU_CFLAGS-y += $(CFLAG_-std=gnu99)
 321
 322 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
 323 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
 324
 325 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
 326 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)    += -Wl,-EB
 327
 328 PICFLAG-y := -fPIC
 329 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
 330 PICFLAG-$(UCLIBC_FORMAT_DSBT_ELF)  := -mdsbt -fpic
 331 PICFLAG := $(PICFLAG-y)
 332 PIEFLAG_NAME:=-fPIE
 333
 334 # Some nice CPU specific optimizations
 335 ifeq ($(TARGET_ARCH),i386)
 336 $(eval $(call check-gcc-var,-fomit-frame-pointer))
 337         OPTIMIZATION += $(CFLAG_-fomit-frame-pointer)
 338
 339 ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586),y)
 340         # TODO: Change this to a gcc version check.  This bug
 341         # should be fixed with at least gcc-4.3.
 342         # Non-SSE capable processor.
 343         # NB: this may make SSE insns segfault!
 344         # -O1 -march=pentium3, -Os -msse etc are known to be affected.
 345         # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
 346         # -m32 is needed if host is 64-bit
 347         OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
 348 else
 349 $(eval $(call check-gcc-var,-mpreferred-stack-boundary=4))
 350         OPTIMIZATION += $(CFLAG_-mpreferred-stack-boundary=4)
 351 endif
 352
 353         # Choice of alignment (please document why!)
 354         #  -falign-labels: in-line labels
 355         #  (reachable by normal code flow, aligning will insert nops
 356         #  which will be executed - may even make things slower)
 357         #  -falign-jumps: reachable only by a jump
 358         # Generic: no alignment at all (smallest code)
 359         GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
 360         OPTIMIZATION+=$(GCC_FALIGN)
 361
 362         # Putting each function and data object into its own section
 363         # allows for kbytes of less text if users link against static uclibc
 364         # using ld --gc-sections.
 365         # ld 2.18 can't do that (yet?) for shared libraries, so we itself
 366         # do not use --gc-sections at shared lib link time.
 367         # However, in combination with sections being sorted by alignment
 368         # it does result in much reduced padding:
 369         #   text    data     bss     dec     hex
 370         # 235319    1472    5992  242783   3b45f old.so
 371         # 234104    1472    5980  241556   3af94 new.so
 372         # Without -ffunction-sections, all functions will get aligned
 373         # to 4 byte boundary by as/ld. This is arguably a bug in as.
 374         # It specifies 4 byte align for .text even if not told to do so:
 375         # Idx Name          Size      VMA       LMA       File off  Algn
 376         #   0 .text         xxxxxxxx  00000000  00000000  xxxxxxxx  2**2 <===!
 377         CPU_CFLAGS-y  += $(CFLAG_-ffunction-sections) $(CFLAG_-fdata-sections)
 378         CPU_LDFLAGS-y += $(CFLAG_-Wl--sort-common)
 379 $(eval $(call check-ld-var,--sort-section=alignment))
 380         CPU_LDFLAGS-y += $(CFLAG_-Wl--sort-section=alignment)
 381
 382         CPU_LDFLAGS-y+=-m32
 383         CPU_CFLAGS-y+=-m32
 384 endif
 385
 386 ifeq ($(TARGET_ARCH),sparc)
 387         CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
 388         CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
 389         CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
 390         CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
 391 endif
 392
 393 ifeq ($(TARGET_ARCH),arm)
 394         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 395         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 396         CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb
 397 endif
 398
 399 ifeq ($(TARGET_ARCH),metag)
 400         SYMBOL_PREFIX=_
 401         CPU_CFLAGS-$(CONFIG_META_1_2)+=
 402         CPU_CFLAGS-$(CONFIG_META_2_1)+=-Wa,-mcpu=metac21
 403 endif
 404
 405 ifeq ($(TARGET_ARCH),mips)
 406         OPTIMIZATION+=-mno-split-addresses
 407         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
 408         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
 409         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
 410         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
 411         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
 412         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
 413         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
 414         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64R2)+=-mips64r2 -mtune=mips64r2
 415         ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
 416                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
 417                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
 418         endif
 419         ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
 420                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
 421                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
 422         endif
 423         CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
 424         CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
 425         CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
 426 endif
 427
 428 ifeq ($(TARGET_ARCH),nios)
 429         OPTIMIZATION+=-funaligned-struct-hack
 430         CPU_LDFLAGS-y+=-Wl,-m32
 431         CPU_CFLAGS-y+=-Wl,-m32
 432 endif
 433
 434 ifeq ($(TARGET_ARCH),sh)
 435 $(eval $(call check-gcc-var,-mprefergot))
 436         OPTIMIZATION += $(CFLAG_-mprefergot)
 437         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
 438         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 439         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 440         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
 441 ifeq ($(UCLIBC_HAS_FPU),y)
 442         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
 443         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 444 else
 445         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
 446         CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
 447 endif
 448 endif
 449
 450 ifeq ($(TARGET_ARCH),sh64)
 451         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 452         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 453         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 454 endif
 455
 456 ifeq ($(TARGET_ARCH),h8300)
 457         SYMBOL_PREFIX=_
 458         CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
 459         CPU_LDFLAGS-$(CONFIG_H8S)   += -Wl,-ms8300s
 460         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
 461         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32
 462 endif
 463
 464 ifeq ($(TARGET_ARCH),i960)
 465         OPTIMIZATION+=-mh -mint32 #-fsigned-char
 466 endif
 467
 468 ifeq ($(TARGET_ARCH),e1)
 469         OPTIMIZATION+=-mgnu-param
 470 endif
 471
 472 ifeq ($(TARGET_ARCH),cris)
 473         CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
 474         CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
 475         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 476         PICFLAG:=-fpic
 477         PIEFLAG_NAME:=-fpie
 478 endif
 479
 480 ifeq ($(TARGET_ARCH),m68k)
 481         # -fPIC is only supported for 68020 and above.  It is not supported
 482         # for 68000, 68010, or Coldfire.
 483         PICFLAG:=-fpic
 484         PIEFLAG_NAME:=-fpie
 485 endif
 486
 487 ifeq ($(TARGET_ARCH),powerpc)
 488 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
 489 # enough. Therefore use -fpic which will reduce code size and generates
 490 # faster code.
 491         PICFLAG:=-fpic
 492         PIEFLAG_NAME:=-fpie
 493         PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null -  2> /dev/null && echo -n y || echo -n n)
 494         CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
 495         CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
 496
 497 endif
 498
 499 ifeq ($(TARGET_ARCH),bfin)
 500         SYMBOL_PREFIX=_
 501 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
 502         CPU_CFLAGS-y:=-mfdpic
 503         CPU_LDFLAGS-y += -Wl,-melf32bfinfd
 504         PICFLAG:=-fpic
 505         PIEFLAG_NAME:=-fpie
 506 endif
 507 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
 508         PICFLAG := -mleaf-id-shared-library
 509 endif
 510 endif
 511
 512 ifeq ($(TARGET_ARCH),frv)
 513         CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
 514         # Using -pie causes the program to have an interpreter, which is
 515         # forbidden, so we must make do with -shared.  Unfortunately,
 516         # -shared by itself would get us global function descriptors
 517         # and calls through PLTs, dynamic resolution of symbols, etc,
 518         # which would break as well, but -Bsymbolic comes to the rescue.
 519         export LDPIEFLAG:=-shared -Wl,-Bsymbolic
 520         UCLIBC_LDSO=ld.so.1
 521 endif
 522
 523 ifeq ($(strip $(TARGET_ARCH)),avr32)
 524        CPU_CFLAGS-$(CONFIG_AVR32_AP7)  += -march=ap
 525        CPU_CFLAGS-$(CONFIG_LINKRELAX)  += -mrelax
 526        CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
 527 endif
 528
 529 ifeq ($(TARGET_ARCH),i960)
 530       SYMBOL_PREFIX=_
 531 endif
 532
 533 ifeq ($(TARGET_ARCH),v850)
 534       SYMBOL_PREFIX=_
 535 endif
 536
 537 ifeq ($(TARGET_ARCH),c6x)
 538         PIEFLAG:=
 539         CPU_CFLAGS-$(CONFIG_TMS320C64X) += -march=c64x
 540         CPU_CFLAGS-$(CONFIG_TMS320C64XPLUS) += -march=c64x+
 541         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 542         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 543         CPU_LDFLAGS-y += $(CPU_CFLAGS)
 544 endif
 545
 546 ifeq ($(TARGET_ARCH),arc)
 547         CPU_CFLAGS-y += -mlock -mswape
 548         CPU_CFLAGS-$(CONFIG_ARC_CPU_700) += -mA7
 549         CPU_LDFLAGS-y += $(CPU_CFLAGS) -marclinux
 550 endif
 551
 552 $(eval $(call check-gcc-var,$(PIEFLAG_NAME)))
 553 PIEFLAG := $(CFLAG_$(PIEFLAG_NAME))
 554 ifeq ($(PIEFLAG),)
 555 PIEFLAG := $(PICFLAG)
 556 endif
 557 # We need to keep track of both the CC PIE flag (above) as
 558 # well as the LD PIE flag (below) because we can't rely on
 559 # gcc passing -pie if we used -fPIE. We need to directly use -pie
 560 # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
 561 $(eval $(call cache-output-var,LDPIEFLAG,$(CC) -Wl$(comma)--help 2>/dev/null | grep -q -- -pie && echo "-pie"))
 562
 563 # Check for --as-needed support in linker
 564 ifndef LD_FLAG_ASNEEDED
 565 _LD_FLAG_ASNEEDED:=$(shell $(CC) -Wl,--help 2>/dev/null | grep -- --as-needed)
 566 ifneq ($(_LD_FLAG_ASNEEDED),)
 567 export LD_FLAG_ASNEEDED:=--as-needed
 568 endif
 569 endif
 570 ifndef LD_FLAG_NO_ASNEEDED
 571 ifdef LD_FLAG_ASNEEDED
 572 export LD_FLAG_NO_ASNEEDED:=--no-as-needed
 573 endif
 574 endif
 575 ifndef CC_FLAG_ASNEEDED
 576 ifdef LD_FLAG_ASNEEDED
 577 export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
 578 endif
 579 endif
 580 ifndef CC_FLAG_NO_ASNEEDED
 581 ifdef LD_FLAG_NO_ASNEEDED
 582 export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
 583 endif
 584 endif
 585 link.asneeded = $(if $(findstring yy,$(CC_FLAG_ASNEEDED)$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
 586
 587 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
 588 ifndef ASNEEDED
 589 export ASNEEDED:=$(shell $(CC) -Wl,--help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
 590
 591 # Only used in installed libc.so linker script
 592 ifeq ($(UCLIBC_HAS_BACKTRACE),y)
 593 ifeq ($(HARDWIRED_ABSPATH),y)
 594 UBACKTRACE_FULL_NAME := $(subst //,/,$(RUNTIME_PREFIX)$(MULTILIB_DIR)/$(UBACKTRACE_DSO))
 595 else
 596 UBACKTRACE_FULL_NAME := $(UBACKTRACE_DSO)
 597 endif
 598 export UBACKTRACE_ASNEEDED:=$(shell $(CC) -Wl,--help 2>/dev/null | grep -q -- --as-needed && \
 599         echo "GROUP ( AS_NEEDED ( $(UBACKTRACE_FULL_NAME) ) )" || \
 600         echo "GROUP ( $(UBACKTRACE_FULL_NAME) )")
 601 else
 602 export UBACKTRACE_ASNEEDED:=""
 603 endif
 604 endif
 605
 606 # Add a bunch of extra pedantic annoyingly strict checks
 607 WARNING_FLAGS = -Wstrict-prototypes -Wstrict-aliasing
 608 ifeq ($(EXTRA_WARNINGS),y)
 609 WARNING_FLAGS += \
 610         -Wformat=2 \
 611         -Wmissing-noreturn \
 612         -Wmissing-format-attribute \
 613         -Wmissing-prototypes \
 614         -Wmissing-declarations \
 615         -Wnested-externs \
 616         -Wnonnull \
 617         -Wold-style-declaration \
 618         -Wold-style-definition \
 619         -Wshadow \
 620         -Wundef
 621 # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
 622 #WARNING_FLAGS-gcc-4 += -Wdeclaration-after-statement
 623 endif
 624 WARNING_FLAGS += $(WARNING_FLAGS-gcc-$(GCC_MAJOR_VER))
 625 $(foreach w,$(WARNING_FLAGS),$(eval $(call check-gcc-var,$(w))))
 626 XWARNINGS = $(call qstrip,$(WARNINGS)) $(foreach w,$(WARNING_FLAGS),$(CFLAG_$(w)))
 627
 628 CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
 629
 630 # Save the tested flag in a single variable and force it to be
 631 # evaluated just once.  Then use that computed value.
 632 $(eval $(call check-gcc-var,-fno-stack-protector))
 633 SSP_DISABLE_FLAGS ?= $(CFLAG_-fno-stack-protector)
 634 ifeq ($(UCLIBC_BUILD_SSP),y)
 635 $(eval $(call check-gcc-var,-fno-stack-protector-all))
 636 $(eval $(call check-gcc-var,-fstack-protector))
 637 $(eval $(call check-gcc-var,-fstack-protector-all))
 638 SSP_CFLAGS := $(CFLAG_-fno-stack-protector-all)
 639 SSP_CFLAGS += $(CFLAG_-fstack-protector)
 640 SSP_ALL_CFLAGS ?= $(CFLAG_-fstack-protector-all)
 641 else
 642 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
 643 endif
 644
 645 # Collect all CFLAGS components
 646 CFLAGS := $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
 647         -nostdinc -I$(top_builddir)include \
 648         -I$(top_srcdir)include -include libc-symbols.h \
 649         -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH) \
 650         -I$(top_srcdir)libc/sysdeps/linux \
 651         -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
 652         -I$(top_srcdir)ldso/include -I.
 653
 654 # We need this to be checked within libc-symbols.h
 655 ifneq ($(HAVE_SHARED),y)
 656 CFLAGS += -DSTATIC
 657 endif
 658
 659 $(eval $(call check-ld-var,--warn-once))
 660 $(eval $(call check-ld-var,--sort-common))
 661 $(eval $(call check-ld-var,--discard-all))
 662 LDFLAGS_NOSTRIP:=$(LDFLAG-fuse-ld) $(CPU_LDFLAGS-y) -shared \
 663         -Wl,--warn-common $(CFLAG_-Wl--warn-once) -Wl,-z,combreloc
 664 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
 665 #$(eval $(call check-ld-var,--gc-sections))
 666 #LDFLAGS_NOSTRIP += $(LDFLAG_--gc-sections)
 667
 668 $(eval $(call check-gcc-var,-fdata-sections))
 669 $(eval $(call check-gcc-var,-ffunction-sections))
 670
 671 ifeq ($(UCLIBC_BUILD_RELRO),y)
 672 LDFLAGS_NOSTRIP+=-Wl,-z,relro
 673 endif
 674
 675 ifeq ($(UCLIBC_BUILD_NOW),y)
 676 LDFLAGS_NOSTRIP+=-Wl,-z,now
 677 endif
 678
 679 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
 680 # Be sure that binutils support it
 681 $(eval $(call check-ld-var,--hash-style=gnu))
 682 ifeq ($(LDFLAG_--hash-style=gnu),)
 683 ifneq ($(filter-out $(clean_targets) CLEAN_% install_headers headers-y,$(MAKECMDGOALS)),)
 684 $(error Your binutils do not support --hash-style option, while you want to use it)
 685 endif
 686 else
 687 LDFLAGS_NOSTRIP += $(CFLAG_-Wl--hash-style=gnu)
 688 endif
 689 endif
 690
 691 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
 692 ifeq ($(DODEBUG),y)
 693 CFLAGS += -O0 -g3 -DDEBUG
 694 else
 695 CFLAGS += $(OPTIMIZATION)
 696 CFLAGS += $(OPTIMIZATION-$(GCC_MAJOR_VER))
 697 CFLAGS += $(OPTIMIZATION-$(GCC_MAJOR_VER).$(GCC_MINOR_VER))
 698 endif
 699 ifeq ($(DOSTRIP),y)
 700 LDFLAGS += -Wl,-s
 701 else
 702 STRIPTOOL := true -Stripping_disabled
 703 endif
 704
 705 ifeq ($(DOMULTI),y)
 706 # we try to compile all sources at once into an object (IMA), but
 707 # gcc-3.3.x does not support it
 708 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
 709 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
 710 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
 711 ifeq ($(GCC_MAJOR_VER),3)
 712 DOMULTI:=n
 713 else
 714 $(eval $(call check-gcc-var,--combine))
 715 CFLAGS += $(CFLAG_--combine)
 716 endif
 717 else
 718 DOMULTI:=n
 719 endif
 720
 721 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
 722 CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
 723 endif
 724 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
 725 LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
 726 endif
 727
 728 ifeq ($(UCLIBC_HAS_STDIO_FUTEXES),y)
 729 CFLAGS += -D__USE_STDIO_FUTEXES__
 730 endif
 731
 732 ifeq ($(UCLIBC_HAS_THREADS),y)
 733 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 734         PTNAME := nptl
 735         CFLAGS += -DHAVE_FORCED_UNWIND -D_LIBC_REENTRANT
 736 else
 737 ifeq ($(LINUXTHREADS_OLD),y)
 738         PTNAME := linuxthreads.old
 739 else
 740         PTNAME := linuxthreads
 741 endif
 742 endif
 743 PTDIR := libpthread/$(PTNAME)
 744 # set up system dependencies include dirs (NOTE: order matters!)
 745 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 746 PTINC:= -I$(top_builddir)$(PTDIR)                                       \
 747         -I$(top_srcdir)$(PTDIR)                                         \
 748         $(if $(TARGET_SUBARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
 749         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)  \
 750         -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                \
 751         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                  \
 752         -I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux               \
 753         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux                 \
 754         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread                         \
 755         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits                    \
 756         -I$(top_srcdir)$(PTDIR)/sysdeps/generic
 757 #
 758 # Test for TLS if NPTL support was selected.
 759 #
 760 GCC_HAS_TLS=$(shell \
 761         echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
 762 ifneq ($(GCC_HAS_TLS),)
 763 gcc_tls_test_fail:
 764         @echo "####";
 765         @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
 766         @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
 767         @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
 768         @echo "#### about this problem.";
 769         @echo "####";
 770         @echo "#### Exiting...";
 771         @echo "####";
 772         @exit 1;
 773 endif
 774 else
 775 PTINC := \
 776         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
 777         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
 778         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
 779         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
 780         -I$(top_srcdir)$(PTDIR) \
 781         -I$(top_srcdir)libpthread
 782 endif
 783 CFLAGS+=$(PTINC)
 784 else
 785         PTNAME :=
 786         PTINC  :=
 787 endif
 788 CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
 789
 790 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
 791 $(eval $(call cache-output-var,CC_IPREFIX,$(CC) -print-file-name=include))
 792 CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
 793 CFLAGS += $(CC_INC)
 794
 795 CFLAGS += -I$(KERNEL_HEADERS)
 796
 797 ifneq ($(DOASSERTS),y)
 798 CFLAGS+=-DNDEBUG
 799 endif
 800
 801 ifeq ($(SYMBOL_PREFIX),_)
 802 CFLAGS+=-D__UCLIBC_UNDERSCORES__
 803 endif
 804
 805 # Keep the check_as from being needlessly executed
 806 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
 807 $(eval $(call check-as-var,--noexecstack))
 808 endif
 809 ASFLAGS += $(ASFLAG_--noexecstack)
 810
 811 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 812 $(eval $(call cache-output-var,LIBGCC,$(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name))
 813 $(eval $(call cache-output-var,LIBGCC_EH,$(CC) $(LIBGCC_CFLAGS) -print-file-name=libgcc_eh.a))
 814 # with -O0 we (e.g. lockf) might end up with references to
 815 # _Unwind_Resume, so pull in gcc_eh in this case..
 816 LIBGCC_DIR:=$(dir $(LIBGCC))
 817 LIBGCC += $(if $(DODEBUG),$(LIBGCC_EH))
 818
 819 # moved from libpthread/linuxthreads
 820 ifeq ($(UCLIBC_CTOR_DTOR),y)
 821 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
 822 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
 823 endif
 824
 825 LOCAL_INSTALL_PATH := $(if $(O),$(O)/)install_dir
 826
 827 PTHREAD_GENERATE_MANGLE ?= -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p"