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 := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
  51                                   -e s/arm.*/arm/ -e s/sa110/arm/ -e s/sh.*/sh/ \
  52                                   -e s/s390x/s390/ -e s/parisc.*/hppa/ \
  53                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  54                                   -e s/xtensa.*/xtensa/ )
  55
  56
  57 #---------------------------------------------------------
  58 # Nothing beyond this point should ever be touched by mere
  59 # mortals.  Unless you hang out with the gods, you should
  60 # probably leave all this stuff alone.
  61
  62 # Pull in the user's uClibc configuration
  63 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  64 -include $(top_builddir).config
  65 endif
  66
  67 # Make certain these contain a final "/", but no "//"s.
  68 TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
  69 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
  70 TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | sed -e 's/^TARGET_SUBARCH=//' -e 's/"//g')
  71 TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
  72 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  73 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  74 KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
  75 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
  76
  77
  78 # Now config hard core
  79 MAJOR_VERSION := 0
  80 MINOR_VERSION := 9
  81 SUBLEVEL      := 29
  82 EXTRAVERSION  :=
  83 VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  84 ifneq ($(EXTRAVERSION),)
  85 VERSION       := $(VERSION)$(EXTRAVERSION)
  86 endif
  87 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  88 LC_ALL := C
  89 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  90
  91 LIBC := libc
  92 SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
  93 ifneq ($(findstring  $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
  94 UCLIBC_LDSO_NAME := ld64-uClibc
  95 else
  96 UCLIBC_LDSO_NAME := ld-uClibc
  97 endif
  98 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
  99 NONSHARED_LIBNAME := uclibc_nonshared.a
 100 libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
 101 interp := $(top_builddir)lib/interp.os
 102 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
 103 headers_dep := $(top_builddir)include/bits/sysnum.h
 104 sub_headers := $(headers_dep)
 105
 106 #LIBS :=$(interp) -L$(top_builddir)lib -lc
 107 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
 108
 109 # Make sure DESTDIR and PREFIX can be used to install
 110 # PREFIX is a uClibcism while DESTDIR is a common GNUism
 111 ifndef PREFIX
 112 PREFIX = $(DESTDIR)
 113 endif
 114
 115 ifneq ($(HAVE_SHARED),y)
 116 libc :=
 117 interp :=
 118 ldso :=
 119 endif
 120
 121 comma:=,
 122 space:= #
 123
 124 ifndef CROSS
 125 CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
 126 endif
 127
 128 # A nifty macro to make testing gcc features easier
 129 check_gcc=$(shell \
 130         if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
 131         then echo "$(1)"; else echo "$(2)"; fi)
 132 check_as=$(shell \
 133         if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
 134         then echo "-Wa,$(1)"; fi)
 135 check_ld=$(shell \
 136         if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
 137         then echo "$(1)"; fi)
 138
 139 ARFLAGS:=cr
 140
 141 OPTIMIZATION:=
 142 # Use '-Os' optimization if available, else use -O2, allow Config to override
 143 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 144 # Use the gcc 3.4 -funit-at-a-time optimization when available
 145 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
 146
 147 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
 148 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
 149
 150 ifeq ($(GCC_MAJOR_VER),4)
 151 # shrinks code, results are from 4.0.2
 152 # 0.36%
 153 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
 154 # 0.34%
 155 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
 156 # 0.1%
 157 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
 158 endif
 159
 160 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
 161 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
 162
 163 PICFLAG-y := -fPIC
 164 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
 165 PICFLAG := $(PICFLAG-y)
 166 PIEFLAG_NAME:=-fPIE
 167
 168 # Some nice CPU specific optimizations
 169 ifeq ($(TARGET_ARCH),i386)
 170         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
 171         OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
 172         CPU_LDFLAGS-y+=-m32
 173         CPU_CFLAGS-y+=-m32
 174         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
 175         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
 176         CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
 177         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
 178         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
 179         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
 180         CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
 181         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
 182         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
 183         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
 184         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
 185         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
 186         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
 187         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
 188         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
 189         CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
 190 endif
 191
 192 ifeq ($(TARGET_ARCH),sparc)
 193         CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
 194         CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
 195         CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
 196         CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
 197 endif
 198
 199 ifeq ($(TARGET_ARCH),arm)
 200         OPTIMIZATION+=-fstrict-aliasing
 201         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 202         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 203         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 204         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 205         CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
 206         CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
 207         CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
 208         CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
 209         CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
 210         CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
 211         CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
 212         CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
 213         CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
 214         CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
 215         CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
 216         CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
 217         CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
 218         CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
 219         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
 220         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
 221         CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
 222         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
 223         CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
 224 endif
 225
 226 ifeq ($(TARGET_ARCH),mips)
 227         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 228         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 229         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
 230         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
 231         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
 232         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
 233         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
 234         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
 235         ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
 236                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
 237                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
 238         endif
 239         ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
 240                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
 241                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
 242         endif
 243         CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
 244         CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
 245         CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
 246 endif
 247
 248 ifeq ($(TARGET_ARCH),nios)
 249         CPU_LDFLAGS-y+=-Wl,-m32
 250         CPU_CFLAGS-y+=-Wl,-m32
 251 endif
 252
 253 ifeq ($(TARGET_ARCH),sh)
 254         OPTIMIZATION+=-fstrict-aliasing
 255         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 256         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
 257         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
 258         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
 259         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 260         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 261         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
 262 ifeq ($(UCLIBC_HAS_FLOATS),y)
 263         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
 264         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 265 else
 266         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
 267         CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
 268 endif
 269 endif
 270
 271 ifeq ($(TARGET_ARCH),sh64)
 272         OPTIMIZATION+=-fstrict-aliasing
 273         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-Wl,-EL
 274         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-Wl,-EB
 275         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 276         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 277         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 278 endif
 279
 280 ifeq ($(TARGET_ARCH),h8300)
 281         SYMBOL_PREFIX=_
 282         CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
 283         CPU_LDFLAGS-$(CONFIG_H8S)   += -Wl,-ms8300s
 284         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
 285         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32
 286 endif
 287
 288 ifeq ($(TARGET_ARCH),cris)
 289         CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
 290         CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
 291         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 292         PICFLAG:=-fpic
 293         PIEFLAG_NAME:=-fpie
 294 endif
 295
 296 ifeq ($(TARGET_ARCH),m68k)
 297         # -fPIC is only supported for 68020 and above.  It is not supported
 298         # for 68000, 68010, or Coldfire.
 299         PICFLAG:=-fpic
 300         PIEFLAG_NAME:=-fpie
 301 endif
 302
 303 ifeq ($(TARGET_ARCH),powerpc)
 304 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
 305 # enough. Therefore use -fpic which will reduce code size and generates
 306 # faster code.
 307         PICFLAG:=-fpic
 308         PIEFLAG_NAME:=-fpie
 309         PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null -  2> /dev/null && echo -n y || echo -n n)
 310         CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
 311         CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES -D__NO_LONG_DOUBLE_MATH"
 312
 313 endif
 314
 315 ifeq ($(TARGET_ARCH),bfin)
 316         SYMBOL_PREFIX=_
 317 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
 318         CPU_CFLAGS-y:=-mfdpic
 319         CPU_LDFLAGS-y += -Wl,-melf32bfinfd
 320         PICFLAG:=-fpic
 321         PIEFLAG_NAME:=-fpie
 322 endif
 323 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
 324         PICFLAG := -mleaf-id-shared-library
 325 endif
 326 endif
 327
 328 ifeq ($(TARGET_ARCH),frv)
 329         CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
 330         # Using -pie causes the program to have an interpreter, which is
 331         # forbidden, so we must make do with -shared.  Unfortunately,
 332         # -shared by itself would get us global function descriptors
 333         # and calls through PLTs, dynamic resolution of symbols, etc,
 334         # which would break as well, but -Bsymbolic comes to the rescue.
 335         export LDPIEFLAG:=-Wl,-shared -Wl,-Bsymbolic
 336         UCLIBC_LDSO=ld.so.1
 337 endif
 338
 339 ifeq ($(strip $(TARGET_ARCH)),avr32)
 340        CPU_CFLAGS-$(CONFIG_AVR32_AP7)  += -march=ap
 341        CPU_CFLAGS-$(CONFIG_LINKRELAX)  += -mrelax
 342        CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
 343 endif
 344
 345 ifeq ($(TARGET_ARCH),i960)
 346       SYMBOL_PREFIX=_
 347 endif
 348
 349 ifeq ($(TARGET_ARCH),microblaze)
 350       SYMBOL_PREFIX=_
 351 endif
 352
 353 ifeq ($(TARGET_ARCH),v850)
 354       SYMBOL_PREFIX=_
 355 endif
 356
 357 # Keep the check_gcc from being needlessly executed
 358 ifndef PIEFLAG
 359 ifneq ($(UCLIBC_BUILD_PIE),y)
 360 export PIEFLAG:=
 361 else
 362 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
 363 endif
 364 endif
 365 # We need to keep track of both the CC PIE flag (above) as
 366 # well as the LD PIE flag (below) because we can't rely on
 367 # gcc passing -pie if we used -fPIE
 368 ifndef LDPIEFLAG
 369 ifneq ($(UCLIBC_BUILD_PIE),y)
 370 export LDPIEFLAG:=
 371 else
 372 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
 373 endif
 374 endif
 375
 376 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
 377 ifndef ASNEEDED
 378 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
 379 endif
 380
 381 # Add a bunch of extra pedantic annoyingly strict checks
 382 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
 383 ifeq ($(EXTRA_WARNINGS),y)
 384 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
 385 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
 386 XWARNINGS+=-Wnonnull -Wundef
 387 # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
 388 #XWARNINGS+=-Wdeclaration-after-statement
 389 endif
 390 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
 391 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
 392
 393 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
 394 ifeq ($(UCLIBC_BUILD_SSP),y)
 395 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
 396 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
 397 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
 398 else
 399 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
 400 endif
 401
 402 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
 403 # Some nice CFLAGS to work with
 404 CFLAGS := -include $(top_builddir)include/libc-symbols.h \
 405         $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
 406         -fno-builtin -nostdinc -I$(top_builddir)include -I. \
 407         -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
 408
 409 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
 410 CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
 411 endif
 412
 413 LDADD_LIBFLOAT=
 414 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 415 # If -msoft-float isn't supported, we want an error anyway.
 416 # Hmm... might need to revisit this for arm since it has 2 different
 417 # soft float encodings.
 418 ifneq ($(TARGET_ARCH),nios)
 419 ifneq ($(TARGET_ARCH),nios2)
 420 CFLAGS += -msoft-float
 421 endif
 422 endif
 423 ifeq ($(TARGET_ARCH),arm)
 424 # No longer needed with current toolchains, but leave it here for now.
 425 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
 426 #    LDADD_LIBFLOAT=-lfloat
 427 endif
 428 endif
 429
 430 # We need this to be checked within libc-symbols.h
 431 ifneq ($(HAVE_SHARED),y)
 432 CFLAGS += -DSTATIC
 433 endif
 434
 435 CFLAGS += $(call check_gcc,-std=gnu99,)
 436
 437 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -Wl,-shared \
 438         -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc
 439 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
 440 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
 441
 442 ifeq ($(UCLIBC_BUILD_RELRO),y)
 443 LDFLAGS_NOSTRIP+=-Wl,-z,relro
 444 endif
 445
 446 ifeq ($(UCLIBC_BUILD_NOW),y)
 447 LDFLAGS_NOSTRIP+=-Wl,-z,now
 448 endif
 449
 450 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
 451 # Be sure that binutils support it
 452 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
 453 ifeq ($(LDFLAGS_GNUHASH),)
 454 $(error Your binutils don't support --hash-style option, while you want to use it)
 455 else
 456 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
 457 endif
 458 endif
 459
 460 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
 461 ifeq ($(DODEBUG),y)
 462 #CFLAGS += -g3
 463 CFLAGS += -O0 -g3
 464 else
 465 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
 466 endif
 467 ifeq ($(DOSTRIP),y)
 468 LDFLAGS += -Wl,-s
 469 else
 470 STRIPTOOL := true -Stripping_disabled
 471 endif
 472
 473 ifeq ($(DOMULTI),y)
 474 # we try to compile all sources at once into an object (IMA), but
 475 # gcc-3.3.x does not support it
 476 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
 477 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
 478 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
 479 ifeq ($(GCC_MAJOR_VER),3)
 480 DOMULTI:=n
 481 else
 482 CFLAGS+=$(call check_gcc,--combine,)
 483 endif
 484 else
 485 DOMULTI:=n
 486 endif
 487
 488 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
 489 LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
 490 endif
 491
 492 ifeq ($(UCLIBC_HAS_THREADS),y)
 493 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 494         PTNAME := nptl
 495 else
 496 ifeq ($(LINUXTHREADS_OLD),y)
 497         PTNAME := linuxthreads.old
 498 else
 499         PTNAME := linuxthreads
 500 endif
 501 endif
 502 PTDIR := $(top_builddir)libpthread/$(PTNAME)
 503 # set up system dependencies include dirs (NOTE: order matters!)
 504 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
 505 PTINC:= -I$(PTDIR)                                              \
 506         -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)       \
 507         -I$(PTDIR)/sysdeps/$(TARGET_ARCH)                       \
 508         -I$(PTDIR)/sysdeps/unix/sysv/linux                      \
 509         -I$(PTDIR)/sysdeps/pthread                              \
 510         -I$(PTDIR)/sysdeps/pthread/bits                         \
 511         -I$(PTDIR)/sysdeps/generic                              \
 512         -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH)                 \
 513         -I$(top_srcdir)ldso/include
 514 #
 515 # Test for TLS if NPTL support was selected.
 516 #
 517 GCC_HAS_TLS=$(shell \
 518         echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
 519 ifneq ($(GCC_HAS_TLS),)
 520 gcc_tls_test_fail:
 521         @echo "####";
 522         @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
 523         @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
 524         @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
 525         @echo "#### about this problem.";
 526         @echo "####";
 527         @echo "#### Exiting...";
 528         @echo "####";
 529         @exit 1;
 530 endif
 531 else
 532 PTINC := \
 533         -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
 534         -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
 535         -I$(PTDIR)/sysdeps/unix/sysv/linux \
 536         -I$(PTDIR)/sysdeps/pthread \
 537         -I$(PTDIR) \
 538         -I$(top_builddir)libpthread
 539 endif
 540 CFLAGS+=$(PTINC)
 541 else
 542         PTNAME :=
 543         PTINC  :=
 544 endif
 545 CFLAGS += -I$(KERNEL_HEADERS)
 546
 547 CFLAGS += -iwithprefix include-fixed -iwithprefix include
 548
 549 ifneq ($(DOASSERTS),y)
 550 CFLAGS+=-DNDEBUG
 551 endif
 552
 553 ifeq ($(SYMBOL_PREFIX),_)
 554 CFLAGS+=-D__UCLIBC_UNDERSCORES__
 555 endif
 556
 557 # Keep the check_as from being needlessly executed
 558 ifndef ASFLAGS_NOEXEC
 559 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
 560 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
 561 else
 562 export ASFLAGS_NOEXEC :=
 563 endif
 564 endif
 565 ASFLAGS = $(ASFLAGS_NOEXEC)
 566
 567 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 568 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 569 LIBGCC_DIR:=$(dir $(LIBGCC))
 570
 571 # moved from libpthread/linuxthreads
 572 ifeq ($(UCLIBC_CTOR_DTOR),y)
 573 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
 574 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
 575 endif