1 # Rules.make for uClibc
3 # Copyright (C) 2000-2008 Erik Andersen <andersen@uclibc.org>
5 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
8 # check for proper make version
9 ifneq ($(findstring x3.7,x$(MAKE_VERSION)),)
10 $(error Your make is too old $(MAKE_VERSION). Go get at least 3.80)
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.
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.
27 # Most people will set this stuff on the command line, i.e.
28 # make CROSS=arm-linux-
29 # will build uClibc for 'arm'.
38 STRIPTOOL = $(CROSS)strip
47 STRIP_FLAGS ?= -x -R .note -R .comment
49 UNIFDEF := $(top_builddir)extra/scripts/unifdef -UUCLIBC_INTERNAL
51 # Select the compiler needed to build binaries for your development system
53 BUILD_CFLAGS = -O2 -Wall
54 export ARCH := $(shell uname -m | $(SED) -e s/i.86/i386/ \
55 -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
56 -e s/arm.*/arm/ -e s/sa110/arm/ \
58 -e s/s390x/s390/ -e s/parisc.*/hppa/ \
59 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
60 -e s/xtensa.*/xtensa/ )
63 #---------------------------------------------------------
64 # Nothing beyond this point should ever be touched by mere
65 # mortals. Unless you hang out with the gods, you should
66 # probably leave all this stuff alone.
68 # Pull in the user's uClibc configuration
69 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
70 -include $(top_builddir).config
73 # Make certain these contain a final "/", but no "//"s.
74 TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_ARCH=//' -e 's/"//g')
75 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
76 TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_SUBARCH=//' -e 's/"//g')
77 TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
78 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
79 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
80 KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
81 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
84 # Now config hard core
88 EXTRAVERSION :=-rc3-svn
89 VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
90 ifneq ($(EXTRAVERSION),)
91 VERSION := $(VERSION)$(EXTRAVERSION)
93 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
95 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
98 SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
99 ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
100 UCLIBC_LDSO_NAME := ld64-uClibc
102 UCLIBC_LDSO_NAME := ld-uClibc
104 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
105 NONSHARED_LIBNAME := uclibc_nonshared.a
106 libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
107 libc.depend := $(top_builddir)lib/$(SHARED_MAJORNAME:.$(MAJOR_VERSION)=)
108 interp := $(top_builddir)lib/interp.os
109 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
110 headers_dep := $(top_builddir)include/bits/sysnum.h
111 sub_headers := $(headers_dep)
113 #LIBS :=$(interp) -L$(top_builddir)lib -lc
114 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
116 # Make sure DESTDIR and PREFIX can be used to install
117 # PREFIX is a uClibcism while DESTDIR is a common GNUism
122 ifneq ($(HAVE_SHARED),y)
132 CROSS=$(strip $(subst ",, $(CROSS_COMPILER_PREFIX)))
135 # A nifty macro to make testing gcc features easier
137 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
138 then echo "$(1)"; else echo "$(2)"; fi)
140 if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
141 then echo "-Wa,$(1)"; fi)
143 if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
144 then echo "$(1)"; fi)
148 # Flags in OPTIMIZATION are used only for non-debug builds
150 # Use '-Os' optimization if available, else use -O2, allow Config to override
151 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
152 # Use the gcc 3.4 -funit-at-a-time optimization when available
153 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
155 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
156 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
158 ifeq ($(GCC_MAJOR_VER),4)
159 # shrinks code, results are from 4.0.2
161 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
163 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
165 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
168 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
169 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
172 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
173 PICFLAG := $(PICFLAG-y)
176 # Some nice CPU specific optimizations
177 ifeq ($(TARGET_ARCH),i386)
178 OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
180 # NB: this may make SSE insns segfault!
181 # -O1 -march=pentium3, -Os -msse etc are known to be affected.
182 # TODO: conditionally bump to 4
183 # (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685)
184 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
186 # Choice of alignment (please document why!)
187 # -falign-labels: in-line labels
188 # (reachable by normal code flow, aligning will insert nops
189 # which will be executed - may even make things slower)
190 # -falign-jumps: reachable only by a jump
191 # Generic: no alignment at all (smallest code)
192 GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
193 ifeq ($(CONFIG_K7),y)
194 # Align functions to four bytes, use default for jumps and loops (why?)
195 GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
197 ifeq ($(CONFIG_CRUSOE),y)
198 # Use compiler's default for functions, jumps and loops (why?)
199 GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
201 ifeq ($(CONFIG_CYRIXIII),y)
202 # Use compiler's default for functions, jumps and loops (why?)
203 GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
205 OPTIMIZATION+=$(GCC_FALIGN)
207 # Putting each function and data object into its own section
208 # allows for kbytes of less text if users link against static uclibc
209 # using ld --gc-sections.
210 # ld 2.18 can't do that (yet?) for shared libraries, so we itself
211 # do not use --gc-sections at shared lib link time.
212 # However, in combination with sections being sorted by alignment
213 # it does result in much reduced padding:
214 # text data bss dec hex
215 # 235319 1472 5992 242783 3b45f old.so
216 # 234104 1472 5980 241556 3af94 new.so
217 # Without -ffunction-sections, all functions will get aligned
218 # to 4 byte boundary by as/ld. This is arguably a bug in as.
219 # It specifies 4 byte align for .text even if not told to do so:
220 # Idx Name Size VMA LMA File off Algn
221 # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
222 CPU_CFLAGS-y += $(call check_gcc,-ffunction-sections -fdata-sections,)
223 ifneq ($(call check_ld,--sort-common,),)
224 CPU_LDFLAGS-y += -Wl,--sort-common
226 ifneq ($(call check_ld,--sort-section alignment),)
227 CPU_LDFLAGS-y += -Wl,--sort-section,alignment
232 CPU_CFLAGS-$(CONFIG_386)+=-march=i386
233 CPU_CFLAGS-$(CONFIG_486)+=-march=i486
234 CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
235 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
236 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
237 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
238 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
239 CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
240 CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
241 CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
242 CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
243 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
244 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
245 CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
246 CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
247 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
250 ifeq ($(TARGET_ARCH),sparc)
251 CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
252 CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
253 CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
254 CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
257 ifeq ($(TARGET_ARCH),arm)
258 OPTIMIZATION+=-fstrict-aliasing
259 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
260 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
261 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
262 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
263 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
264 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
265 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
266 CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
267 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
268 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
269 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
270 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
271 CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
272 CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
273 CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
274 CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
275 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
276 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
277 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
278 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
279 CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
280 CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
281 CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
284 ifeq ($(TARGET_ARCH),mips)
285 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
286 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
287 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
288 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
289 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
290 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
291 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
292 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
293 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
294 ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
295 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
296 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
298 ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
299 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
300 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
302 CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
303 CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
304 CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
307 ifeq ($(TARGET_ARCH),nios)
308 CPU_LDFLAGS-y+=-Wl,-m32
309 CPU_CFLAGS-y+=-Wl,-m32
312 ifeq ($(TARGET_ARCH),sh)
313 OPTIMIZATION+=-fstrict-aliasing
314 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
315 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
316 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
317 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
318 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
319 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
320 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
321 ifeq ($(UCLIBC_HAS_FLOATS),y)
322 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
323 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
325 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
326 CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
330 ifeq ($(TARGET_ARCH),sh64)
331 OPTIMIZATION+=-fstrict-aliasing
332 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-Wl,-EL
333 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-Wl,-EB
334 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
335 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
336 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
339 ifeq ($(TARGET_ARCH),h8300)
341 CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
342 CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
343 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
344 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
347 ifeq ($(TARGET_ARCH),cris)
348 CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
349 CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
350 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
355 ifeq ($(TARGET_ARCH),m68k)
356 # -fPIC is only supported for 68020 and above. It is not supported
357 # for 68000, 68010, or Coldfire.
362 ifeq ($(TARGET_ARCH),powerpc)
363 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
364 # enough. Therefore use -fpic which will reduce code size and generates
368 PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
369 CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
370 CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
374 ifeq ($(TARGET_ARCH),bfin)
376 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
377 CPU_CFLAGS-y:=-mfdpic
378 CPU_LDFLAGS-y += -Wl,-melf32bfinfd
382 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
383 PICFLAG := -mleaf-id-shared-library
387 ifeq ($(TARGET_ARCH),frv)
388 CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
389 # Using -pie causes the program to have an interpreter, which is
390 # forbidden, so we must make do with -shared. Unfortunately,
391 # -shared by itself would get us global function descriptors
392 # and calls through PLTs, dynamic resolution of symbols, etc,
393 # which would break as well, but -Bsymbolic comes to the rescue.
394 export LDPIEFLAG:=-Wl,-shared -Wl,-Bsymbolic
398 ifeq ($(strip $(TARGET_ARCH)),avr32)
399 CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
400 CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
401 CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
404 ifeq ($(TARGET_ARCH),i960)
408 ifeq ($(TARGET_ARCH),microblaze)
412 ifeq ($(TARGET_ARCH),v850)
416 # Keep the check_gcc from being needlessly executed
418 ifneq ($(UCLIBC_BUILD_PIE),y)
421 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
424 # We need to keep track of both the CC PIE flag (above) as
425 # well as the LD PIE flag (below) because we can't rely on
426 # gcc passing -pie if we used -fPIE
428 ifneq ($(UCLIBC_BUILD_PIE),y)
431 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
435 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
437 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
440 # Add a bunch of extra pedantic annoyingly strict checks
441 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
442 ifeq ($(EXTRA_WARNINGS),y)
443 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
444 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
445 XWARNINGS+=-Wnonnull -Wundef
446 # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
447 #XWARNINGS+=-Wdeclaration-after-statement
449 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
450 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
452 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
453 ifeq ($(UCLIBC_BUILD_SSP),y)
454 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
455 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
456 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
458 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
461 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
462 # Some nice CFLAGS to work with
463 CFLAGS := -include $(top_builddir)include/libc-symbols.h \
464 $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
465 -fno-builtin -nostdinc -I$(top_builddir)include -I. \
466 -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
468 # Make sure that we can be built with non-C99 compilers, too.
469 # Use __\1__ instead.
470 CFLAGS += $(call check_gcc,-fno-asm,)
471 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
472 CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
476 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
477 # If -msoft-float isn't supported, we want an error anyway.
478 # Hmm... might need to revisit this for arm since it has 2 different
479 # soft float encodings.
480 ifneq ($(TARGET_ARCH),nios)
481 ifneq ($(TARGET_ARCH),nios2)
482 ifneq ($(TARGET_ARCH),sh)
483 CFLAGS += -msoft-float
487 ifeq ($(TARGET_ARCH),arm)
488 # No longer needed with current toolchains, but leave it here for now.
489 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
490 # LDADD_LIBFLOAT=-lfloat
494 # Please let us see private headers' parts
495 CFLAGS += -DUCLIBC_INTERNAL
497 # We need this to be checked within libc-symbols.h
498 ifneq ($(HAVE_SHARED),y)
502 CFLAGS += $(call check_gcc,-std=gnu99,)
504 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -Wl,-shared \
505 -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc
506 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
507 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
509 ifeq ($(UCLIBC_BUILD_RELRO),y)
510 LDFLAGS_NOSTRIP+=-Wl,-z,relro
513 ifeq ($(UCLIBC_BUILD_NOW),y)
514 LDFLAGS_NOSTRIP+=-Wl,-z,now
517 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
518 # Be sure that binutils support it
519 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
520 ifeq ($(LDFLAGS_GNUHASH),)
521 $(error Your binutils don't support --hash-style option, while you want to use it)
523 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
527 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
531 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
536 STRIPTOOL := true -Stripping_disabled
540 # we try to compile all sources at once into an object (IMA), but
541 # gcc-3.3.x does not support it
542 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
543 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
544 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
545 ifeq ($(GCC_MAJOR_VER),3)
548 CFLAGS+=$(call check_gcc,--combine,)
554 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
555 LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
558 ifeq ($(UCLIBC_HAS_THREADS),y)
559 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
562 ifeq ($(LINUXTHREADS_OLD),y)
563 PTNAME := linuxthreads.old
565 PTNAME := linuxthreads
568 PTDIR := $(top_builddir)libpthread/$(PTNAME)
569 # set up system dependencies include dirs (NOTE: order matters!)
570 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
572 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
573 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
574 -I$(PTDIR)/sysdeps/unix/sysv/linux \
575 -I$(PTDIR)/sysdeps/pthread \
576 -I$(PTDIR)/sysdeps/pthread/bits \
577 -I$(PTDIR)/sysdeps/generic \
578 -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
579 -I$(top_srcdir)ldso/include
581 # Test for TLS if NPTL support was selected.
583 GCC_HAS_TLS=$(shell \
584 echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
585 ifneq ($(GCC_HAS_TLS),)
588 @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
589 @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
590 @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
591 @echo "#### about this problem.";
593 @echo "#### Exiting...";
599 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
600 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
601 -I$(PTDIR)/sysdeps/unix/sysv/linux \
602 -I$(PTDIR)/sysdeps/pthread \
604 -I$(top_builddir)libpthread
611 CFLAGS += -I$(KERNEL_HEADERS)
613 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
614 CC_IPREFIX:=$(shell $(CC) --print-file-name=include)
615 CFLAGS += -I$(dir $(CC_IPREFIX))/include-fixed -I$(CC_IPREFIX)
617 ifneq ($(DOASSERTS),y)
621 ifeq ($(SYMBOL_PREFIX),_)
622 CFLAGS+=-D__UCLIBC_UNDERSCORES__
625 # Keep the check_as from being needlessly executed
626 ifndef ASFLAGS_NOEXEC
627 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
628 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
630 export ASFLAGS_NOEXEC :=
633 ASFLAGS = $(ASFLAGS_NOEXEC)
635 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
636 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
637 LIBGCC_DIR:=$(dir $(LIBGCC))
639 # moved from libpthread/linuxthreads
640 ifeq ($(UCLIBC_CTOR_DTOR),y)
641 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
642 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
645 LOCAL_INSTALL_PATH := install_dir