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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 //,/, $(subst ,/, $(call qstrip,$(RUNTIME_PREFIX)))))
99 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(DEVEL_PREFIX)))))
100 MULTILIB_DIR:=$(strip $(subst //,/, $(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      := 33
109 EXTRAVERSION  :=-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+=$(call check_gcc,-fmerge-all-constants)
189 OPTIMIZATION+=$(call check_gcc,-fstrict-aliasing)
190
191 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
192 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
193
194 ifeq ($(GCC_MAJOR_VER),4)
195 # shrinks code, results are from 4.0.2
196 # 0.36%
197 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
198 # 0.34%
199 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
200 # 0.1%
201 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
202 endif
203
204
205 # CPU_CFLAGS-y contain options which are not warnings,
206 # not include or library paths, and not optimizations.
207
208 # Why -funsigned-char: I hunted a bug related to incorrect
209 # sign extension of 'char' type for 10 hours straight. Not fun.
210 CPU_CFLAGS-y := -funsigned-char -fno-builtin
211
212 CPU_CFLAGS-y += $(call check_gcc,-fno-asm,)
213
214 LDADD_LIBFLOAT=
215 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
216 # If -msoft-float isn't supported, we want an error anyway.
217 # Hmm... might need to revisit this for arm since it has 2 different
218 # soft float encodings.
219 ifneq ($(TARGET_ARCH),nios)
220 ifneq ($(TARGET_ARCH),nios2)
221 ifneq ($(TARGET_ARCH),sh)
222 ifneq ($(TARGET_ARCH),c6x)
223 CPU_CFLAGS-y += -msoft-float
224 endif
225 endif
226 endif
227 endif
228 ifeq ($(TARGET_ARCH),arm)
229 # No longer needed with current toolchains, but leave it here for now.
230 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
231 #    LDADD_LIBFLOAT=-lfloat
232 endif
233 endif
234
235 CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,)
236
237 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
238 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
239
240 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
241 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)    += -Wl,-EB
242
243 PICFLAG-y := -fPIC
244 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
245 PICFLAG-$(UCLIBC_FORMAT_DSBT_ELF)  := -mdsbt -fpic
246 PICFLAG := $(PICFLAG-y)
247 PIEFLAG_NAME:=-fPIE
248
249 # Some nice CPU specific optimizations
250 ifeq ($(TARGET_ARCH),i386)
251         OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
252
253 ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
254         # Non-SSE capable processor.
255         # NB: this may make SSE insns segfault!
256         # -O1 -march=pentium3, -Os -msse etc are known to be affected.
257         # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
258         # -m32 is needed if host is 64-bit
259         OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
260 else
261         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
262 endif
263
264         # Choice of alignment (please document why!)
265         #  -falign-labels: in-line labels
266         #  (reachable by normal code flow, aligning will insert nops
267         #  which will be executed - may even make things slower)
268         #  -falign-jumps: reachable only by a jump
269         # Generic: no alignment at all (smallest code)
270         GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
271 ifeq ($(CONFIG_K7),y)
272         # Align functions to four bytes, use default for jumps and loops (why?)
273         GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
274 endif
275 ifeq ($(CONFIG_CRUSOE),y)
276         # Use compiler's default for functions, jumps and loops (why?)
277         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
278 endif
279 ifeq ($(CONFIG_CYRIXIII),y)
280         # Use compiler's default for functions, jumps and loops (why?)
281         GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
282 endif
283         OPTIMIZATION+=$(GCC_FALIGN)
284
285         # Putting each function and data object into its own section
286         # allows for kbytes of less text if users link against static uclibc
287         # using ld --gc-sections.
288         # ld 2.18 can't do that (yet?) for shared libraries, so we itself
289         # do not use --gc-sections at shared lib link time.
290         # However, in combination with sections being sorted by alignment
291         # it does result in much reduced padding:
292         #   text    data     bss     dec     hex
293         # 235319    1472    5992  242783   3b45f old.so
294         # 234104    1472    5980  241556   3af94 new.so
295         # Without -ffunction-sections, all functions will get aligned
296         # to 4 byte boundary by as/ld. This is arguably a bug in as.
297         # It specifies 4 byte align for .text even if not told to do so:
298         # Idx Name          Size      VMA       LMA       File off  Algn
299         #   0 .text         xxxxxxxx  00000000  00000000  xxxxxxxx  2**2 <===!
300         CPU_CFLAGS-y  += $(call check_gcc,-ffunction-sections -fdata-sections,)
301 ifneq ($(call check_ld,--sort-common),)
302         CPU_LDFLAGS-y += -Wl,--sort-common
303 endif
304 ifneq ($(call check_ld,--sort-section alignment),)
305         CPU_LDFLAGS-y += -Wl,--sort-section,alignment
306 endif
307
308         CPU_LDFLAGS-y+=-m32
309         CPU_CFLAGS-y+=-m32
310         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
311         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
312         CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
313         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
314         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
315         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
316         CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
317         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
318         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
319         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
320         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
321         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
322         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
323         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
324         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
325         CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
326 endif
327
328 ifeq ($(TARGET_ARCH),sparc)
329         CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
330         CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
331         CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
332         CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
333 endif
334
335 ifeq ($(TARGET_ARCH),arm)
336         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
337         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
338         CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb
339 endif
340
341 ifeq ($(TARGET_ARCH),mips)
342         OPTIMIZATION+=-mno-split-addresses
343         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
344         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
345         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
346         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
347         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
348         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
349         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
350         ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
351                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
352                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
353         endif
354         ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
355                 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
356                 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
357         endif
358         CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
359         CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
360         CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
361 endif
362
363 ifeq ($(TARGET_ARCH),nios)
364         OPTIMIZATION+=-funaligned-struct-hack
365         CPU_LDFLAGS-y+=-Wl,-m32
366         CPU_CFLAGS-y+=-Wl,-m32
367 endif
368
369 ifeq ($(TARGET_ARCH),sh)
370         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
371         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
372         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
373         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
374         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
375 ifeq ($(UCLIBC_HAS_FPU),y)
376         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
377         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
378 else
379         CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
380         CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
381 endif
382 endif
383
384 ifeq ($(TARGET_ARCH),sh64)
385         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
386         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
387         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
388 endif
389
390 ifeq ($(TARGET_ARCH),h8300)
391         SYMBOL_PREFIX=_
392         CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
393         CPU_LDFLAGS-$(CONFIG_H8S)   += -Wl,-ms8300s
394         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
395         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32
396 endif
397
398 ifeq ($(TARGET_ARCH),i960)
399         OPTIMIZATION+=-mh -mint32 #-fsigned-char
400 endif
401
402 ifeq ($(TARGET_ARCH),e1)
403         OPTIMIZATION+=-mgnu-param
404 endif
405
406 ifeq ($(TARGET_ARCH),cris)
407         CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
408         CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
409         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
410         PICFLAG:=-fpic
411         PIEFLAG_NAME:=-fpie
412 endif
413
414 ifeq ($(TARGET_ARCH),m68k)
415         # -fPIC is only supported for 68020 and above.  It is not supported
416         # for 68000, 68010, or Coldfire.
417         PICFLAG:=-fpic
418         PIEFLAG_NAME:=-fpie
419 endif
420
421 ifeq ($(TARGET_ARCH),powerpc)
422 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
423 # enough. Therefore use -fpic which will reduce code size and generates
424 # faster code.
425         PICFLAG:=-fpic
426         PIEFLAG_NAME:=-fpie
427         PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null -  2> /dev/null && echo -n y || echo -n n)
428         CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
429         CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
430
431 endif
432
433 ifeq ($(TARGET_ARCH),bfin)
434         SYMBOL_PREFIX=_
435 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
436         CPU_CFLAGS-y:=-mfdpic
437         CPU_LDFLAGS-y += -Wl,-melf32bfinfd
438         PICFLAG:=-fpic
439         PIEFLAG_NAME:=-fpie
440 endif
441 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
442         PICFLAG := -mleaf-id-shared-library
443 endif
444 endif
445
446 ifeq ($(TARGET_ARCH),frv)
447         CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
448         # Using -pie causes the program to have an interpreter, which is
449         # forbidden, so we must make do with -shared.  Unfortunately,
450         # -shared by itself would get us global function descriptors
451         # and calls through PLTs, dynamic resolution of symbols, etc,
452         # which would break as well, but -Bsymbolic comes to the rescue.
453         export LDPIEFLAG:=-shared -Wl,-Bsymbolic
454         UCLIBC_LDSO=ld.so.1
455 endif
456
457 ifeq ($(strip $(TARGET_ARCH)),avr32)
458        CPU_CFLAGS-$(CONFIG_AVR32_AP7)  += -march=ap
459        CPU_CFLAGS-$(CONFIG_LINKRELAX)  += -mrelax
460        CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
461 endif
462
463 ifeq ($(TARGET_ARCH),i960)
464       SYMBOL_PREFIX=_
465 endif
466
467 ifeq ($(TARGET_ARCH),v850)
468       SYMBOL_PREFIX=_
469 endif
470
471 ifeq ($(TARGET_ARCH),c6x)
472         PIEFLAG:=
473         CPU_CFLAGS-$(CONFIG_TMS320C64X) += -march=c64x
474         CPU_CFLAGS-$(CONFIG_TMS320C64XPLUS) += -march=c64x+
475         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
476         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
477         CPU_LDFLAGS-y += $(CPU_CFLAGS)
478 endif
479
480 # Keep the check_gcc from being needlessly executed
481 ifndef PIEFLAG
482 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
483 endif
484 # We need to keep track of both the CC PIE flag (above) as
485 # well as the LD PIE flag (below) because we can't rely on
486 # gcc passing -pie if we used -fPIE. We need to directly use -pie
487 # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
488 ifndef LDPIEFLAG
489 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")
490 endif
491
492 # Check for --as-needed support in linker
493 ifndef LD_FLAG_ASNEEDED
494 _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
495 ifneq ($(_LD_FLAG_ASNEEDED),)
496 export LD_FLAG_ASNEEDED:=--as-needed
497 endif
498 endif
499 ifndef LD_FLAG_NO_ASNEEDED
500 ifdef LD_FLAG_ASNEEDED
501 export LD_FLAG_NO_ASNEEDED:=--no-as-needed
502 endif
503 endif
504 ifndef CC_FLAG_ASNEEDED
505 ifdef LD_FLAG_ASNEEDED
506 export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
507 endif
508 endif
509 ifndef CC_FLAG_NO_ASNEEDED
510 ifdef LD_FLAG_NO_ASNEEDED
511 export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
512 endif
513 endif
514 link.asneeded = $(if $(findstring yy,$(CC_FLAG_ASNEEDED)$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
515
516 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
517 ifndef ASNEEDED
518 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
519 ifeq ($(UCLIBC_HAS_BACKTRACE),y)
520 # Only used in installed libc.so linker script
521 UBACKTRACE_FULL_NAME := $(RUNTIME_PREFIX)lib/$(UBACKTRACE_DSO)
522 export UBACKTRACE_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UBACKTRACE_FULL_NAME) )" || echo "$(UBACKTRACE_FULL_NAME)")
523 else
524 export UBACKTRACE_ASNEEDED:=""
525 endif
526 endif
527
528 # Add a bunch of extra pedantic annoyingly strict checks
529 XWARNINGS=$(call qstrip,$(WARNINGS))
530 XWARNINGS+=$(foreach w,\
531         -Wstrict-prototypes \
532         -Wstrict-aliasing \
533         , $(call check_gcc,$(w),))
534 ifeq ($(EXTRA_WARNINGS),y)
535 XWARNINGS+=$(foreach w,\
536         -Wformat=2 \
537         -Wmissing-noreturn \
538         -Wmissing-format-attribute \
539         -Wmissing-prototypes \
540         -Wmissing-declarations \
541         -Wnested-externs \
542         -Wnonnull \
543         -Wold-style-declaration \
544         -Wold-style-definition \
545         -Wshadow \
546         -Wundef \
547         , $(call check_gcc,$(w),))
548 # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
549 #XWARNINGS+=-Wdeclaration-after-statement
550 endif
551 CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
552
553 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
554 ifeq ($(UCLIBC_BUILD_SSP),y)
555 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
556 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
557 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
558 else
559 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
560 endif
561
562 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
563
564 # Collect all CFLAGS components
565 CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
566         $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
567         -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
568         -I$(top_srcdir)libc/sysdeps/linux \
569         -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
570
571 # We need this to be checked within libc-symbols.h
572 ifneq ($(HAVE_SHARED),y)
573 CFLAGS += -DSTATIC
574 endif
575
576 LDFLAG_WARN_ONCE:=$(if $(call check_ld,--warn-once),-Wl$(comma)--warn-once)
577 LDFLAG_SORT_COMMON:=$(if $(call check_ld,--sort-common),-Wl$(comma)--sort-common)
578 LDFLAG_DISCARD_ALL:=$(if $(call check_ld,--discard-all),-Wl$(comma)--discard-all)
579 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
580         -Wl,--warn-common $(LDFLAG_WARN_ONCE) -Wl,-z,combreloc
581 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
582 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
583
584 ifeq ($(UCLIBC_BUILD_RELRO),y)
585 LDFLAGS_NOSTRIP+=-Wl,-z,relro
586 endif
587
588 ifeq ($(UCLIBC_BUILD_NOW),y)
589 LDFLAGS_NOSTRIP+=-Wl,-z,now
590 endif
591
592 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
593 # Be sure that binutils support it
594 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
595 ifeq ($(LDFLAGS_GNUHASH),)
596 ifneq ($(filter-out $(clean_targets) install_headers headers-y,$(MAKECMDGOALS)),)
597 $(error Your binutils do not support --hash-style option, while you want to use it)
598 endif
599 else
600 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
601 endif
602 endif
603
604 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
605 ifeq ($(DODEBUG),y)
606 CFLAGS += -O0 -g3 -DDEBUG
607 else
608 CFLAGS += $(OPTIMIZATION)
609 endif
610 ifeq ($(DOSTRIP),y)
611 LDFLAGS += -Wl,-s
612 else
613 STRIPTOOL := true -Stripping_disabled
614 endif
615 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
616 CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
617 endif
618
619 ifeq ($(DOMULTI),y)
620 # we try to compile all sources at once into an object (IMA), but
621 # gcc-3.3.x does not support it
622 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
623 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
624 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
625 ifeq ($(GCC_MAJOR_VER),3)
626 DOMULTI:=n
627 else
628 CFLAGS+=$(call check_gcc,--combine,)
629 endif
630 else
631 DOMULTI:=n
632 endif
633
634 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
635 LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
636 endif
637
638 ifeq ($(UCLIBC_HAS_THREADS),y)
639 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
640         PTNAME := nptl
641         CFLAGS += -DHAVE_FORCED_UNWIND
642 else
643 ifeq ($(LINUXTHREADS_OLD),y)
644         PTNAME := linuxthreads.old
645 else
646         PTNAME := linuxthreads
647 endif
648 endif
649 PTDIR := libpthread/$(PTNAME)
650 # set up system dependencies include dirs (NOTE: order matters!)
651 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
652 PTINC:= -I$(top_builddir)$(PTDIR)                                       \
653         -I$(top_srcdir)$(PTDIR)                                         \
654         $(if $(TARGET_ARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
655         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)  \
656         -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                \
657         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH)                  \
658         -I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux               \
659         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux                 \
660         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread                         \
661         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits                    \
662         -I$(top_srcdir)$(PTDIR)/sysdeps/generic                         \
663         -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH)                         \
664         -I$(top_srcdir)ldso/include
665 #
666 # Test for TLS if NPTL support was selected.
667 #
668 GCC_HAS_TLS=$(shell \
669         echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
670 ifneq ($(GCC_HAS_TLS),)
671 gcc_tls_test_fail:
672         @echo "####";
673         @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
674         @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
675         @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
676         @echo "#### about this problem.";
677         @echo "####";
678         @echo "#### Exiting...";
679         @echo "####";
680         @exit 1;
681 endif
682 else
683 PTINC := \
684         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
685         -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
686         -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
687         -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
688         -I$(top_srcdir)$(PTDIR) \
689         -I$(top_srcdir)libpthread
690 endif
691 CFLAGS+=$(PTINC)
692 else
693         PTNAME :=
694         PTINC  :=
695 endif
696 CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
697 CFLAGS += -I$(KERNEL_HEADERS)
698
699 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
700 CC_IPREFIX := $(shell $(CC) --print-file-name=include)
701 CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
702 CFLAGS += $(CC_INC)
703
704 ifneq ($(DOASSERTS),y)
705 CFLAGS+=-DNDEBUG
706 endif
707
708 ifeq ($(SYMBOL_PREFIX),_)
709 CFLAGS+=-D__UCLIBC_UNDERSCORES__
710 endif
711
712 # Keep the check_as from being needlessly executed
713 ifndef ASFLAGS_NOEXEC
714 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
715 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
716 else
717 export ASFLAGS_NOEXEC :=
718 endif
719 endif
720 ASFLAGS = $(ASFLAGS_NOEXEC)
721
722 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
723 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
724 LIBGCC_DIR:=$(dir $(LIBGCC))
725
726 # moved from libpthread/linuxthreads
727 ifeq ($(UCLIBC_CTOR_DTOR),y)
728 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
729 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
730 endif
731
732 LOCAL_INSTALL_PATH := install_dir