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 //,/, $(call qstrip,$(RUNTIME_PREFIX))))
  99 DEVEL_PREFIX:=$(strip $(subst //,/, $(call qstrip,$(DEVEL_PREFIX))))
 100 MULTILIB_DIR:=$(strip $(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  :=-rc2-git
 110 VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
 111 ABI_VERSION   := $(MAJOR_VERSION)
 112 ifneq ($(EXTRAVERSION),)
 113 VERSION       := $(VERSION)$(EXTRAVERSION)
 114 endif
 115 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
 116 LC_ALL := C
 117 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL
 118
 119 LIBC := libc
 120 SHARED_LIBNAME := $(LIBC).so.$(ABI_VERSION)
 121 UBACKTRACE_DSO := libubacktrace.so.$(MAJOR_VERSION)
 122 ifneq ($(findstring  $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
 123 UCLIBC_LDSO_NAME := ld64-uClibc
 124 ARCH_NATIVE_BIT := 64
 125 else
 126 UCLIBC_LDSO_NAME := ld-uClibc
 127 ARCH_NATIVE_BIT := 32
 128 endif
 129 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION)
 130 NONSHARED_LIBNAME := uclibc_nonshared.a
 131 libc := $(top_builddir)lib/$(SHARED_LIBNAME)
 132 libc.depend := $(top_builddir)lib/$(SHARED_LIBNAME:.$(ABI_VERSION)=)
 133 ifneq ($(ARCH_HAS_NO_SHARED),y)
 134 libdl.depend := $(top_builddir)lib/libdl.so
 135 endif
 136 ifneq ($(HAS_NO_THREADS),y)
 137 libpthread.depend := $(top_builddir)lib/libpthread.so
 138 endif
 139 interp := $(top_builddir)lib/interp.os
 140 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
 141 headers_dep := $(top_builddir)include/bits/sysnum.h
 142 sub_headers := $(headers_dep)
 143
 144 #LIBS :=$(interp) -L$(top_builddir)lib -lc
 145 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(ABI_VERSION)=)
 146
 147 # Make sure DESTDIR and PREFIX can be used to install
 148 # PREFIX is a uClibcism while DESTDIR is a common GNUism
 149 ifndef PREFIX
 150 PREFIX = $(DESTDIR)
 151 endif
 152
 153 ifneq ($(HAVE_SHARED),y)
 154 libc :=
 155 interp :=
 156 ldso :=
 157 endif
 158
 159 comma:=,
 160 space:= #
 161
 162 ifndef CROSS
 163 CROSS=$(call qstrip,$(CROSS_COMPILER_PREFIX))
 164 endif
 165
 166 # A nifty macro to make testing gcc features easier
 167 check_gcc=$(shell \
 168         if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
 169         then echo "$(1)"; else echo "$(2)"; fi)
 170 check_as=$(shell \
 171         if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
 172         then echo "-Wa,$(1)"; fi)
 173 check_ld=$(shell \
 174         if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
 175         then echo "$(1)"; fi)
 176
 177 ARFLAGS:=cr
 178
 179
 180 # Flags in OPTIMIZATION are used only for non-debug builds
 181
 182 OPTIMIZATION:=
 183 # Use '-Os' optimization if available, else use -O2, allow Config to override
 184 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 185 # Use the gcc 3.4 -funit-at-a-time optimization when available
 186 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
 187 # shrinks code by about 0.1%
 188 OPTIMIZATION+=$(call check_gcc,-fmerge-all-constants)
 189
 190 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
 191 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
 192
 193 ifeq ($(GCC_MAJOR_VER),4)
 194 # shrinks code, results are from 4.0.2
 195 # 0.36%
 196 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
 197 # 0.34%
 198 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
 199 # 0.1%
 200 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
 201 endif
 202
 203
 204 # CPU_CFLAGS-y contain options which are not warnings,
 205 # not include or library paths, and not optimizations.
 206
 207 # Why -funsigned-char: I hunted a bug related to incorrect
 208 # sign extension of 'char' type for 10 hours straight. Not fun.
 209 CPU_CFLAGS-y := -funsigned-char -fno-builtin
 210
 211 CPU_CFLAGS-y += $(call check_gcc,-fno-asm,)
 212
 213 LDADD_LIBFLOAT=
 214 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 215 # If -msoft-float isn't supported, we want an error anyway.
 216 # Hmm... might need to revisit this for arm since it has 2 different
 217 # soft float encodings.
 218 ifneq ($(TARGET_ARCH),nios)
 219 ifneq ($(TARGET_ARCH),nios2)
 220 ifneq ($(TARGET_ARCH),sh)
 221 ifneq ($(TARGET_ARCH),c6x)
 222 CPU_CFLAGS-y += -msoft-float
 223 endif
 224 endif
 225 endif
 226 endif
 227 ifeq ($(TARGET_ARCH),arm)
 228 # No longer needed with current toolchains, but leave it here for now.
 229 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
 230 #    LDADD_LIBFLOAT=-lfloat
 231 endif
 232 endif
 233
 234 CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,)
 235
 236 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
 237 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
 238
 239 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
 240 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)    += -Wl,-EB
 241
 242 PICFLAG-y := -fPIC
 243 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
 244 PICFLAG-$(UCLIBC_FORMAT_DSBT_ELF)  := -mdsbt -fpic
 245 PICFLAG := $(PICFLAG-y)
 246 PIEFLAG_NAME:=-fPIE
 247
 248 # Some nice CPU specific optimizations
 249 ifeq ($(TARGET_ARCH),i386)
 250         OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
 251
 252 ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
 253         # Non-SSE capable processor.
 254         # NB: this may make SSE insns segfault!
 255         # -O1 -march=pentium3, -Os -msse etc are known to be affected.
 256         # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
 257         # -m32 is needed if host is 64-bit
 258         OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
 259 else
 260         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
 261 endif
 262
 263         # Choice of alignment (please document why!)
 264         #  -falign-labels: in-line labels
 265         #  (reachable by normal code flow, aligning will insert nops
 266         #  which will be executed - may even make things slower)
 267         #  -falign-jumps: reachable only by a jump
 268         # Generic: no alignment at all (smallest code)
 269         GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
 270 ifeq ($(CONFIG_K7),y)
 271         # Align functions to four bytes, use default for jumps and loops (why?)
 272         GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
 273 endif
 274 ifeq ($(CONFIG_CRUSOE),y)
 275         # Use compiler's default for functions, jumps and loops (why?)
 276         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 277 endif
 278 ifeq ($(CONFIG_CYRIXIII),y)
 279         # Use compiler's default for functions, jumps and loops (why?)
 280         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
 281 endif
 282         OPTIMIZATION+=$(GCC_FALIGN)
 283
 284         # Putting each function and data object into its own section
 285         # allows for kbytes of less text if users link against static uclibc
 286         # using ld --gc-sections.
 287         # ld 2.18 can't do that (yet?) for shared libraries, so we itself
 288         # do not use --gc-sections at shared lib link time.
 289         # However, in combination with sections being sorted by alignment
 290         # it does result in much reduced padding:
 291         #   text    data     bss     dec     hex
 292         # 235319    1472    5992  242783   3b45f old.so
 293         # 234104    1472    5980  241556   3af94 new.so
 294         # Without -ffunction-sections, all functions will get aligned
 295         # to 4 byte boundary by as/ld. This is arguably a bug in as.
 296         # It specifies 4 byte align for .text even if not told to do so:
 297         # Idx Name          Size      VMA       LMA       File off  Algn
 298         #   0 .text         xxxxxxxx  00000000  00000000  xxxxxxxx  2**2 <===!
 299         CPU_CFLAGS-y  += $(call check_gcc,-ffunction-sections -fdata-sections,)
 300 ifneq ($(call check_ld,--sort-common),)
 301         CPU_LDFLAGS-y += -Wl,--sort-common
 302 endif
 303 ifneq ($(call check_ld,--sort-section alignment),)
 304         CPU_LDFLAGS-y += -Wl,--sort-section,alignment
 305 endif
 306
 307         CPU_LDFLAGS-y+=-m32
 308         CPU_CFLAGS-y+=-m32
 309         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
 310         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
 311         CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
 312         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
 313         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
 314         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
 315         CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
 316         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
 317         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
 318         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
 319         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
 320         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
 321         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
 322         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
 323         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
 324         CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
 325 endif
 326
 327 ifeq ($(TARGET_ARCH),sparc)
 328         CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
 329         CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
 330         CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
 331         CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
 332 endif
 333
 334 ifeq ($(TARGET_ARCH),arm)
 335         OPTIMIZATION+=-fstrict-aliasing
 336         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 337         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 338         CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
 339         CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
 340         CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
 341         CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
 342         CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
 343         CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
 344         CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
 345         CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9e -march=armv5te
 346         CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
 347         CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
 348         CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
 349         CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
 350         CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
 351         CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
 352         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
 353         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
 354         CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
 355         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
 356         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
 357 endif
 358
 359 ifeq ($(TARGET_ARCH),mips)
 360         OPTIMIZATION+=-mno-split-addresses
 361         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
 362         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
 363         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
 364         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
 365         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
 366         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
 367         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
 368         ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
 369                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
 370                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
 371         endif
 372         ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
 373                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
 374                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
 375         endif
 376         CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
 377         CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
 378         CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
 379 endif
 380
 381 ifeq ($(TARGET_ARCH),nios)
 382         OPTIMIZATION+=-funaligned-struct-hack
 383         CPU_LDFLAGS-y+=-Wl,-m32
 384         CPU_CFLAGS-y+=-Wl,-m32
 385 endif
 386
 387 ifeq ($(TARGET_ARCH),sh)
 388         OPTIMIZATION+=-fstrict-aliasing
 389         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 390         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
 391         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 392         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 393         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
 394 ifeq ($(UCLIBC_HAS_FPU),y)
 395         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
 396         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 397 else
 398         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
 399         CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
 400 endif
 401 endif
 402
 403 ifeq ($(TARGET_ARCH),sh64)
 404         OPTIMIZATION+=-fstrict-aliasing
 405         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 406         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 407         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 408 endif
 409
 410 ifeq ($(TARGET_ARCH),h8300)
 411         SYMBOL_PREFIX=_
 412         CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
 413         CPU_LDFLAGS-$(CONFIG_H8S)   += -Wl,-ms8300s
 414         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
 415         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32
 416 endif
 417
 418 ifeq ($(TARGET_ARCH),i960)
 419         OPTIMIZATION+=-mh -mint32 #-fsigned-char
 420 endif
 421
 422 ifeq ($(TARGET_ARCH),e1)
 423         OPTIMIZATION+=-mgnu-param
 424 endif
 425
 426 ifeq ($(TARGET_ARCH),cris)
 427         CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
 428         CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
 429         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 430         PICFLAG:=-fpic
 431         PIEFLAG_NAME:=-fpie
 432 endif
 433
 434 ifeq ($(TARGET_ARCH),m68k)
 435         # -fPIC is only supported for 68020 and above.  It is not supported
 436         # for 68000, 68010, or Coldfire.
 437         PICFLAG:=-fpic
 438         PIEFLAG_NAME:=-fpie
 439 endif
 440
 441 ifeq ($(TARGET_ARCH),powerpc)
 442 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
 443 # enough. Therefore use -fpic which will reduce code size and generates
 444 # faster code.
 445         PICFLAG:=-fpic
 446         PIEFLAG_NAME:=-fpie
 447         PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null -  2> /dev/null && echo -n y || echo -n n)
 448         CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
 449         CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
 450
 451 endif
 452
 453 ifeq ($(TARGET_ARCH),bfin)
 454         SYMBOL_PREFIX=_
 455 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
 456         CPU_CFLAGS-y:=-mfdpic
 457         CPU_LDFLAGS-y += -Wl,-melf32bfinfd
 458         PICFLAG:=-fpic
 459         PIEFLAG_NAME:=-fpie
 460 endif
 461 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
 462         PICFLAG := -mleaf-id-shared-library
 463 endif
 464 endif
 465
 466 ifeq ($(TARGET_ARCH),frv)
 467         CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
 468         # Using -pie causes the program to have an interpreter, which is
 469         # forbidden, so we must make do with -shared.  Unfortunately,
 470         # -shared by itself would get us global function descriptors
 471         # and calls through PLTs, dynamic resolution of symbols, etc,
 472         # which would break as well, but -Bsymbolic comes to the rescue.
 473         export LDPIEFLAG:=-shared -Wl,-Bsymbolic
 474         UCLIBC_LDSO=ld.so.1
 475 endif
 476
 477 ifeq ($(strip $(TARGET_ARCH)),avr32)
 478        CPU_CFLAGS-$(CONFIG_AVR32_AP7)  += -march=ap
 479        CPU_CFLAGS-$(CONFIG_LINKRELAX)  += -mrelax
 480        CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
 481 endif
 482
 483 ifeq ($(TARGET_ARCH),i960)
 484       SYMBOL_PREFIX=_
 485 endif
 486
 487 ifeq ($(TARGET_ARCH),v850)
 488       SYMBOL_PREFIX=_
 489 endif
 490
 491 ifeq ($(TARGET_ARCH),c6x)
 492         PIEFLAG:=
 493         CPU_CFLAGS-$(CONFIG_TMS320C64X) += -march=c64x
 494         CPU_CFLAGS-$(CONFIG_TMS320C64XPLUS) += -march=c64x+
 495         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 496         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 497         CPU_LDFLAGS-y += $(CPU_CFLAGS)
 498 endif
 499
 500 # Keep the check_gcc from being needlessly executed
 501 ifndef PIEFLAG
 502 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
 503 endif
 504 # We need to keep track of both the CC PIE flag (above) as
 505 # well as the LD PIE flag (below) because we can't rely on
 506 # gcc passing -pie if we used -fPIE. We need to directly use -pie
 507 # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
 508 ifndef LDPIEFLAG
 509 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")
 510 endif
 511
 512 # Check for --as-needed support in linker
 513 ifndef LD_FLAG_ASNEEDED
 514 _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
 515 ifneq ($(_LD_FLAG_ASNEEDED),)
 516 export LD_FLAG_ASNEEDED:=--as-needed
 517 endif
 518 endif
 519 ifndef LD_FLAG_NO_ASNEEDED
 520 ifdef LD_FLAG_ASNEEDED
 521 export LD_FLAG_NO_ASNEEDED:=--no-as-needed
 522 endif
 523 endif
 524 ifndef CC_FLAG_ASNEEDED
 525 ifdef LD_FLAG_ASNEEDED
 526 export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
 527 endif
 528 endif
 529 ifndef CC_FLAG_NO_ASNEEDED
 530 ifdef LD_FLAG_NO_ASNEEDED
 531 export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
 532 endif
 533 endif
 534 link.asneeded = $(if $(and $(CC_FLAG_ASNEEDED),$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
 535
 536 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
 537 ifndef ASNEEDED
 538 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
 539 ifeq ($(UCLIBC_HAS_BACKTRACE),y)
 540 # Only used in installed libc.so linker script
 541 UBACKTRACE_FULL_NAME := $(RUNTIME_PREFIX)lib/$(UBACKTRACE_DSO)
 542 export UBACKTRACE_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UBACKTRACE_FULL_NAME) )" || echo "$(UBACKTRACE_FULL_NAME)")
 543 else
 544 export UBACKTRACE_ASNEEDED:=""
 545 endif
 546 endif
 547
 548 # Add a bunch of extra pedantic annoyingly strict checks
 549 XWARNINGS=$(call qstrip,$(WARNINGS))
 550 XWARNINGS+=$(foreach w,\
 551         -Wstrict-prototypes \
 552         -fno-strict-aliasing \
 553         , $(call check_gcc,$(w),))
 554 ifeq ($(EXTRA_WARNINGS),y)
 555 XWARNINGS+=$(foreach w,\
 556         -Wformat=2 \
 557         -Wmissing-noreturn \
 558         -Wmissing-format-attribute \
 559         -Wmissing-prototypes \
 560         -Wmissing-declarations \
 561         -Wnested-externs \
 562         -Wnonnull \
 563         -Wold-style-declaration \
 564         -Wold-style-definition \
 565         -Wshadow \
 566         -Wundef \
 567         , $(call check_gcc,$(w),))
 568 # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
 569 #XWARNINGS+=-Wdeclaration-after-statement
 570 endif
 571 CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
 572
 573 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
 574 ifeq ($(UCLIBC_BUILD_SSP),y)
 575 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
 576 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
 577 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
 578 else
 579 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
 580 endif
 581
 582 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
 583
 584 # Collect all CFLAGS components
 585 CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
 586         $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
 587         -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
 588         -I$(top_srcdir)libc/sysdeps/linux \
 589         -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
 590 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
 591 CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
 592 endif
 593
 594 # We need this to be checked within libc-symbols.h
 595 ifneq ($(HAVE_SHARED),y)
 596 CFLAGS += -DSTATIC
 597 endif
 598
 599 LDFLAG_WARN_ONCE:=$(if $(call check_ld,--warn-once),-Wl$(comma)--warn-once)
 600 LDFLAG_SORT_COMMON:=$(if $(call check_ld,--sort-common),-Wl$(comma)--sort-common)
 601 LDFLAG_DISCARD_ALL:=$(if $(call check_ld,--discard-all),-Wl$(comma)--discard-all)
 602 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
 603         -Wl,--warn-common $(LDFLAG_WARN_ONCE) -Wl,-z,combreloc
 604 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
 605 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
 606
 607 ifeq ($(UCLIBC_BUILD_RELRO),y)
 608 LDFLAGS_NOSTRIP+=-Wl,-z,relro
 609 endif
 610
 611 ifeq ($(UCLIBC_BUILD_NOW),y)
 612 LDFLAGS_NOSTRIP+=-Wl,-z,now
 613 endif
 614
 615 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
 616 # Be sure that binutils support it
 617 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
 618 ifeq ($(LDFLAGS_GNUHASH),)
 619 ifneq ($(filter-out $(clean_targets) install_headers headers-y,$(MAKECMDGOALS)),)
 620 $(error Your binutils do not support --hash-style option, while you want to use it)
 621 endif
 622 else
 623 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
 624 endif
 625 endif
 626
 627 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
 628 ifeq ($(DODEBUG),y)
 629 CFLAGS += -O0 -g3 -DDEBUG
 630 else
 631 CFLAGS += $(OPTIMIZATION)
 632 endif
 633 ifeq ($(DOSTRIP),y)
 634 LDFLAGS += -Wl,-s
 635 else
 636 STRIPTOOL := true -Stripping_disabled
 637 endif
 638
 639 ifeq ($(DOMULTI),y)
 640 # we try to compile all sources at once into an object (IMA), but
 641 # gcc-3.3.x does not support it
 642 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
 643 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
 644 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
 645 ifeq ($(GCC_MAJOR_VER),3)
 646 DOMULTI:=n
 647 else
 648 CFLAGS+=$(call check_gcc,--combine,)
 649 endif
 650 else
 651 DOMULTI:=n
 652 endif
 653
 654 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
 655 LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
 656 endif
 657
 658 ifeq ($(UCLIBC_HAS_THREADS),y)
 659 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 660         PTNAME := nptl
 661         CFLAGS += -DHAVE_FORCED_UNWIND
 662 else
 663 ifeq ($(LINUXTHREADS_OLD),y)
 664         PTNAME := linuxthreads.old
 665 else
 666         PTNAME := linuxthreads
 667 endif
 668 endif
 669 PTDIR := libpthread/$(PTNAME)
 670 # set up system dependencies include dirs (NOTE: order matters!)
 671 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 672 PTINC:= -I$(top_builddir)$(PTDIR)                                       \
 673         -I$(top_srcdir)$(PTDIR)                                         \
 674         $(if $(TARGET_ARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
 675         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)  \
 676         -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                \
 677         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                  \
 678         -I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux               \
 679         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux                 \
 680         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread                         \
 681         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits                    \
 682         -I$(top_srcdir)$(PTDIR)/sysdeps/generic                         \
 683         -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH)                         \
 684         -I$(top_srcdir)ldso/include
 685 #
 686 # Test for TLS if NPTL support was selected.
 687 #
 688 GCC_HAS_TLS=$(shell \
 689         echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
 690 ifneq ($(GCC_HAS_TLS),)
 691 gcc_tls_test_fail:
 692         @echo "####";
 693         @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
 694         @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
 695         @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
 696         @echo "#### about this problem.";
 697         @echo "####";
 698         @echo "#### Exiting...";
 699         @echo "####";
 700         @exit 1;
 701 endif
 702 else
 703 PTINC := \
 704         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
 705         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
 706         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
 707         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
 708         -I$(top_srcdir)$(PTDIR) \
 709         -I$(top_srcdir)libpthread
 710 endif
 711 CFLAGS+=$(PTINC)
 712 else
 713         PTNAME :=
 714         PTINC  :=
 715 endif
 716 CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
 717 CFLAGS += -I$(KERNEL_HEADERS)
 718
 719 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
 720 CC_IPREFIX := $(shell $(CC) --print-file-name=include)
 721 CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
 722 CFLAGS += $(CC_INC)
 723
 724 ifneq ($(DOASSERTS),y)
 725 CFLAGS+=-DNDEBUG
 726 endif
 727
 728 ifeq ($(SYMBOL_PREFIX),_)
 729 CFLAGS+=-D__UCLIBC_UNDERSCORES__
 730 endif
 731
 732 # Keep the check_as from being needlessly executed
 733 ifndef ASFLAGS_NOEXEC
 734 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
 735 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
 736 else
 737 export ASFLAGS_NOEXEC :=
 738 endif
 739 endif
 740 ASFLAGS = $(ASFLAGS_NOEXEC)
 741
 742 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 743 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 744 LIBGCC_DIR:=$(dir $(LIBGCC))
 745
 746 # moved from libpthread/linuxthreads
 747 ifeq ($(UCLIBC_CTOR_DTOR),y)
 748 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
 749 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
 750 endif
 751
 752 LOCAL_INSTALL_PATH := install_dir