Rules.mak

   1 # Rules.make for uClibc
   2 #
   3 # Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
   4 #
   5 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   6 #
   7
   8 # check for proper make version
   9 ifneq ($(findstring 3.7,$(MAKE_VERSION)),)
  10 $(error Your make is too old $(MAKE_VERSION). Go get at least 3.80)
  11 endif
  12
  13 #-----------------------------------------------------------
  14 # This file contains rules which are shared between multiple
  15 # Makefiles.  All normal configuration options live in the
  16 # file named ".config".  Don't mess with this file unless
  17 # you know what you are doing.
  18
  19
  20 #-----------------------------------------------------------
  21 # If you are running a cross compiler, you will want to set
  22 # 'CROSS' to something more interesting ...  Target
  23 # architecture is determined by asking the CC compiler what
  24 # arch it compiles things for, so unless your compiler is
  25 # broken, you should not need to specify TARGET_ARCH.
  26 #
  27 # Most people will set this stuff on the command line, i.e.
  28 #        make CROSS=arm-linux-
  29 # will build uClibc for 'arm'.
  30
  31 ifndef CROSS
  32 CROSS=
  33 endif
  34 CC         = $(CROSS)gcc
  35 AR         = $(CROSS)ar
  36 LD         = $(CROSS)ld
  37 NM         = $(CROSS)nm
  38 STRIPTOOL  = $(CROSS)strip
  39
  40 INSTALL    = install
  41 LN         = ln
  42 RM         = rm -f
  43 TAR        = tar
  44
  45 STRIP_FLAGS ?= -x -R .note -R .comment
  46
  47 # Select the compiler needed to build binaries for your development system
  48 HOSTCC     = gcc
  49 BUILD_CFLAGS = -O2 -Wall
  50 export ARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
  51                                   -e s/arm.*/arm/ -e s/sa110/arm/ -e s/sh.*/sh/ \
  52                                   -e s/s390x/s390/ -e s/parisc.*/hppa/ \
  53                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
  54
  55
  56 #---------------------------------------------------------
  57 # Nothing beyond this point should ever be touched by mere
  58 # mortals.  Unless you hang out with the gods, you should
  59 # probably leave all this stuff alone.
  60
  61 # Pull in the user's uClibc configuration
  62 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  63 -include $(top_builddir).config
  64 endif
  65
  66 # Make certain these contain a final "/", but no "//"s.
  67 TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
  68 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
  69 TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | sed -e 's/^TARGET_SUBARCH=//' -e 's/"//g')
  70 TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
  71 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  72 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  73 KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
  74 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
  75
  76
  77 # Now config hard core
  78 MAJOR_VERSION := 0
  79 MINOR_VERSION := 9
  80 SUBLEVEL      := 29
  81 EXTRAVERSION  :=
  82 VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  83 ifneq ($(EXTRAVERSION),)
  84 VERSION       := $(VERSION)$(EXTRAVERSION)
  85 endif
  86 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  87 LC_ALL := C
  88 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  89
  90 LIBC := libc
  91 SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
  92 ifneq ($(findstring  $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sh64 sparc64 x86_64 ),)
  93 UCLIBC_LDSO_NAME := ld64-uClibc
  94 else
  95 UCLIBC_LDSO_NAME := ld-uClibc
  96 endif
  97 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
  98 NONSHARED_LIBNAME := uclibc_nonshared.a
  99 libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
 100 interp := $(top_builddir)lib/interp.os
 101 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
 102 headers_dep := $(top_builddir)include/bits/sysnum.h
 103 sub_headers := $(headers_dep)
 104
 105 #LIBS :=$(interp) -L$(top_builddir)lib -lc
 106 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
 107
 108 # Make sure DESTDIR and PREFIX can be used to install
 109 # PREFIX is a uClibcism while DESTDIR is a common GNUism
 110 ifndef PREFIX
 111 PREFIX = $(DESTDIR)
 112 endif
 113
 114 ifneq ($(HAVE_SHARED),y)
 115 libc :=
 116 interp :=
 117 ldso :=
 118 endif
 119
 120 ifndef CROSS
 121 CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
 122 endif
 123
 124 # A nifty macro to make testing gcc features easier
 125 check_gcc=$(shell \
 126         if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
 127         then echo "$(1)"; else echo "$(2)"; fi)
 128 check_as=$(shell \
 129         if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
 130         then echo "-Wa,$(1)"; fi)
 131 check_ld=$(shell \
 132         if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
 133         then echo "$(1)"; fi)
 134
 135 ARFLAGS:=cr
 136
 137 OPTIMIZATION:=
 138 # Use '-Os' optimization if available, else use -O2, allow Config to override
 139 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 140 # Use the gcc 3.4 -funit-at-a-time optimization when available
 141 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
 142
 143 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
 144 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
 145
 146 ifeq ($(GCC_MAJOR_VER),4)
 147 # shrinks code, results are from 4.0.2
 148 # 0.36%
 149 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
 150 # 0.34%
 151 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
 152 # 0.1%
 153 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
 154 endif
 155
 156 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
 157         PICFLAG:=-mfdpic
 158 else
 159         PICFLAG:=-fPIC
 160 endif
 161 PIEFLAG_NAME:=-fPIE
 162
 163 # Some nice CPU specific optimizations
 164 ifeq ($(TARGET_ARCH),i386)
 165         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
 166         OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
 167         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
 168         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
 169         CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
 170         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
 171         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
 172         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
 173         CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
 174         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
 175         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
 176         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
 177         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
 178         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
 179         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
 180         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
 181         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
 182         CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
 183 endif
 184
 185 ifeq ($(TARGET_ARCH),sparc)
 186         CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
 187         CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
 188         CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
 189         CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
 190 endif
 191
 192 ifeq ($(TARGET_ARCH),arm)
 193         OPTIMIZATION+=-fstrict-aliasing
 194         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
 195         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
 196         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 197         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 198         CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
 199         CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
 200         CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
 201         CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
 202         CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
 203         CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
 204         CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
 205         CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
 206         CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
 207         CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
 208         CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
 209         CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
 210         CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
 211         CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
 212         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
 213         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
 214         CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
 215 endif
 216
 217 ifeq ($(TARGET_ARCH),mips)
 218         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
 219         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
 220         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
 221         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
 222         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
 223         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
 224         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
 225         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
 226         ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
 227                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-melf64btsmip
 228                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-melf32btsmip
 229         endif
 230         ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
 231                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-melf64ltsmip
 232                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-melf32ltsmip
 233         endif
 234         CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
 235         CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
 236         CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
 237 endif
 238
 239 ifeq ($(TARGET_ARCH),nios)
 240         CPU_LDFLAGS-y+=-m32
 241         CPU_CFLAGS-y+=-m32
 242 endif
 243
 244 ifeq ($(TARGET_ARCH),sh)
 245         OPTIMIZATION+=-fstrict-aliasing
 246         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 247         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
 248         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
 249         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
 250         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 251         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 252         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
 253 ifeq ($(UCLIBC_HAS_FLOATS),y)
 254         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
 255         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 256 else
 257         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
 258         CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
 259 endif
 260 endif
 261
 262 ifeq ($(TARGET_ARCH),sh64)
 263         OPTIMIZATION+=-fstrict-aliasing
 264         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
 265         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
 266         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 267         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 268         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 269 endif
 270
 271 ifeq ($(TARGET_ARCH),h8300)
 272         CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
 273         CPU_LDFLAGS-$(CONFIG_H8S)   += -ms8300s
 274         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
 275         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32
 276 endif
 277
 278 ifeq ($(TARGET_ARCH),cris)
 279         CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
 280         CPU_LDFLAGS-$(CONFIG_CRISV32)+=-mcrislinux
 281         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 282         PICFLAG:=-fpic
 283         PIEFLAG_NAME:=-fpie
 284 endif
 285
 286 ifeq ($(TARGET_ARCH),m68k)
 287         # -fPIC is only supported for 68020 and above.  It is not supported
 288         # for 68000, 68010, or Coldfire.
 289         PICFLAG:=-fpic
 290         PIEFLAG_NAME:=-fpie
 291 endif
 292
 293 ifeq ($(TARGET_ARCH),powerpc)
 294 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
 295 # enough. Therefore use -fpic which will reduce code size and generates
 296 # faster code.
 297         PICFLAG:=-fpic
 298         PIEFLAG_NAME:=-fpie
 299         PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null -  2> /dev/null && echo -n y || echo -n n)
 300         CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
 301         CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES -D__NO_LONG_DOUBLE_MATH"
 302
 303 endif
 304
 305 ifeq ($(TARGET_ARCH),frv)
 306         CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
 307         # Using -pie causes the program to have an interpreter, which is
 308         # forbidden, so we must make do with -shared.  Unfortunately,
 309         # -shared by itself would get us global function descriptors
 310         # and calls through PLTs, dynamic resolution of symbols, etc,
 311         # which would break as well, but -Bsymbolic comes to the rescue.
 312         export LDPIEFLAG:=-shared -Bsymbolic
 313         UCLIBC_LDSO=ld.so.1
 314 endif
 315
 316 # Keep the check_gcc from being needlessly executed
 317 ifndef PIEFLAG
 318 ifneq ($(UCLIBC_BUILD_PIE),y)
 319 export PIEFLAG:=
 320 else
 321 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
 322 endif
 323 endif
 324 # We need to keep track of both the CC PIE flag (above) as
 325 # well as the LD PIE flag (below) because we can't rely on
 326 # gcc passing -pie if we used -fPIE
 327 ifndef LDPIEFLAG
 328 ifneq ($(UCLIBC_BUILD_PIE),y)
 329 export LDPIEFLAG:=
 330 else
 331 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
 332 endif
 333 endif
 334
 335 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
 336 ifndef ASNEEDED
 337 ifneq ($(UCLIBC_HAS_SSP),y)
 338 export ASNEEDED:=
 339 else
 340 export ASNEEDED:=$(shell (LD_TMP=$(mktemp LD_XXXXXX) ; echo "GROUP ( AS_NEEDED ( /usr/lib/libc.so ) )" > $LD_TMP && if $(LD) -T $LD_TMP -o /dev/null > /dev/null 2>&1; then echo "AS_NEEDED ( $(UCLIBC_LDSO) )"; else echo "$(UCLIBC_LDSO)"; fi; rm -f $LD_TMP ) )
 341 endif
 342 endif
 343
 344 # Add a bunch of extra pedantic annoyingly strict checks
 345 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
 346 ifeq ($(EXTRA_WARNINGS),y)
 347 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
 348 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
 349 XWARNINGS+=-Wnonnull -Wundef
 350 # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
 351 #XWARNINGS+=-Wdeclaration-after-statement
 352 endif
 353 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
 354 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
 355
 356 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
 357 ifeq ($(UCLIBC_BUILD_SSP),y)
 358 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
 359 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
 360 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
 361 else
 362 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
 363 endif
 364
 365 # Some nice CFLAGS to work with
 366 CFLAGS := -include $(top_builddir)include/libc-symbols.h \
 367         $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
 368         -fno-builtin -nostdinc -I$(top_builddir)include -I.
 369
 370 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
 371 CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
 372 endif
 373
 374 LDADD_LIBFLOAT=
 375 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 376 # If -msoft-float isn't supported, we want an error anyway.
 377 # Hmm... might need to revisit this for arm since it has 2 different
 378 # soft float encodings.
 379 ifneq ($(TARGET_ARCH),nios)
 380 ifneq ($(TARGET_ARCH),nios2)
 381 CFLAGS += -msoft-float
 382 endif
 383 endif
 384 ifeq ($(TARGET_ARCH),arm)
 385 # No longer needed with current toolchains, but leave it here for now.
 386 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
 387 #    LDADD_LIBFLOAT=-lfloat
 388 endif
 389 endif
 390
 391 # We need this to be checked within libc-symbols.h
 392 ifneq ($(HAVE_SHARED),y)
 393 CFLAGS += -DSTATIC
 394 endif
 395
 396 CFLAGS += $(call check_gcc,-std=gnu99,)
 397
 398 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
 399 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
 400 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
 401
 402 ifeq ($(UCLIBC_BUILD_RELRO),y)
 403 LDFLAGS_NOSTRIP+=-z relro
 404 endif
 405
 406 ifeq ($(UCLIBC_BUILD_NOW),y)
 407 LDFLAGS_NOSTRIP+=-z now
 408 endif
 409
 410 LDFLAGS:=$(LDFLAGS_NOSTRIP) -z defs
 411 ifeq ($(DODEBUG),y)
 412 #CFLAGS += -g3
 413 CFLAGS += -O0 -g3
 414 else
 415 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
 416 endif
 417 ifeq ($(DOSTRIP),y)
 418 LDFLAGS += -s
 419 else
 420 STRIPTOOL := true -Stripping_disabled
 421 endif
 422
 423 ifeq ($(DOMULTI),y)
 424 # we try to compile all sources at once into an object (IMA), but
 425 # gcc-3.3.x does not support it
 426 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
 427 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
 428 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
 429 ifeq ($(GCC_MAJOR_VER),3)
 430 DOMULTI:=n
 431 else
 432 CFLAGS+=$(call check_gcc,--combine,)
 433 endif
 434 else
 435 DOMULTI:=n
 436 endif
 437
 438 ifeq ($(UCLIBC_HAS_THREADS),y)
 439 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 440         PTNAME := nptl
 441 else
 442 ifeq ($(LINUXTHREADS_OLD),y)
 443         PTNAME := linuxthreads.old
 444 else
 445         PTNAME := linuxthreads
 446 endif
 447 endif
 448 PTDIR := $(top_builddir)libpthread/$(PTNAME)
 449 # set up system dependencies include dirs (NOTE: order matters!)
 450 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 451 PTINC:= -I$(PTDIR)                                              \
 452         -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)       \
 453         -I$(PTDIR)/sysdeps/$(TARGET_ARCH)                       \
 454         -I$(PTDIR)/sysdeps/unix/sysv/linux                      \
 455         -I$(PTDIR)/sysdeps/pthread                              \
 456         -I$(PTDIR)/sysdeps/pthread/bits                         \
 457         -I$(PTDIR)/sysdeps/generic                              \
 458         -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH)                 \
 459         -I$(top_srcdir)ldso/include
 460 #
 461 # Test for TLS if NPTL support was selected.
 462 #
 463 GCC_HAS_TLS=$(shell \
 464         echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
 465 ifneq ($(GCC_HAS_TLS),)
 466 gcc_tls_test_fail:
 467         @echo "####";
 468         @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
 469         @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
 470         @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
 471         @echo "#### about this problem.";
 472         @echo "####";
 473         @echo "#### Exiting...";
 474         @echo "####";
 475         @exit 1;
 476 endif
 477 else
 478 PTINC := \
 479         -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
 480         -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
 481         -I$(PTDIR)/sysdeps/unix/sysv/linux \
 482         -I$(PTDIR)/sysdeps/pthread \
 483         -I$(PTDIR) \
 484         -I$(top_builddir)libpthread
 485 endif
 486 CFLAGS+=$(PTINC)
 487 else
 488         PTNAME :=
 489         PTINC  :=
 490 endif
 491 CFLAGS += -I$(KERNEL_HEADERS)
 492
 493 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
 494 #CFLAGS+=-iwithprefix include
 495 CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
 496
 497 ifneq ($(DOASSERTS),y)
 498 CFLAGS+=-DNDEBUG
 499 endif
 500
 501 # Keep the check_as from being needlessly executed
 502 ifndef ASFLAGS_NOEXEC
 503 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
 504 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
 505 else
 506 export ASFLAGS_NOEXEC :=
 507 endif
 508 endif
 509 ASFLAGS = $(ASFLAGS_NOEXEC)
 510
 511 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 512 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 513 LIBGCC_DIR:=$(dir $(LIBGCC))
 514
 515 # moved from libpthread/linuxthreads
 516 ifeq ($(UCLIBC_CTOR_DTOR),y)
 517 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
 518 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
 519 endif