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.
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 :=).
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)
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.
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.
38 # Most people will set this stuff on the command line, i.e.
39 # make CROSS=arm-linux-
40 # will build uClibc for 'arm'.
49 STRIPTOOL
= $(CROSS
)strip
58 STRIP_FLAGS ?
= -x
-R .note
-R .comment
60 ## unused? if yes, remove after 0.9.31
61 ## UNIFDEF := $(top_builddir)extra/scripts/unifdef
63 # Select the compiler needed to build binaries for your development system
65 BUILD_CFLAGS
= -Os
-Wall
66 SUBARCH
:= $(shell uname
-m |
$(SED
) -e s
/i
.86/i386
/ \
67 -e s
/sun.
*/sparc
/ -e s
/sparc.
*/sparc
/ \
68 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
70 -e s
/s390x
/s390
/ -e s
/parisc.
*/hppa
/ \
71 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ \
72 -e s
/xtensa.
*/xtensa
/ )
76 #---------------------------------------------------------
77 # Nothing beyond this point should ever be touched by mere
78 # mortals. Unless you hang out with the gods, you should
79 # probably leave all this stuff alone.
82 # Pull in the user's uClibc configuration
83 ifeq ($(filter $(noconfig_targets
),$(MAKECMDGOALS
)),)
84 -include $(top_builddir
).config
87 # Make certain these contain a final "/", but no "//"s.
88 TARGET_ARCH
:=$(shell grep
-s
'^TARGET_ARCH' $(top_builddir
)/.config |
$(SED
) -e
's/^TARGET_ARCH=//' -e
's/"//g')
89 TARGET_ARCH
:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
90 TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_SUBARCH=//' -e 's/"//g
')
91 TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
92 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
93 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
94 KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
95 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
98 # Now config hard core
103 VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
104 ifneq ($(EXTRAVERSION),)
105 VERSION := $(VERSION)$(EXTRAVERSION)
107 # Ensure consistent sort order, 'gcc
-print-search-dirs
' behavior, etc.
109 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
112 SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
113 ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
114 UCLIBC_LDSO_NAME := ld64-uClibc
115 ARCH_NATIVE_BIT := 64
117 UCLIBC_LDSO_NAME := ld-uClibc
118 ARCH_NATIVE_BIT := 32
120 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
121 NONSHARED_LIBNAME := uclibc_nonshared.a
122 libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
123 libc.depend := $(top_builddir)lib/$(SHARED_MAJORNAME:.$(MAJOR_VERSION)=)
124 interp := $(top_builddir)lib/interp.os
125 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
126 headers_dep := $(top_builddir)include/bits/sysnum.h
127 sub_headers := $(headers_dep)
129 #LIBS :=$(interp) -L$(top_builddir)lib -lc
130 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
132 # Make sure DESTDIR and PREFIX can be used to install
133 # PREFIX is a uClibcism while DESTDIR is a common GNUism
138 ifneq ($(HAVE_SHARED),y)
148 CROSS=$(strip $(subst ",, $(CROSS_COMPILER_PREFIX)))
151 # A nifty macro to make testing gcc features easier
153 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
154 then echo "$(1)"; else echo "$(2)"; fi)
156 if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
157 then echo "-Wa,$(1)"; fi)
159 if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
160 then echo "$(1)"; fi)
165 # Flags in OPTIMIZATION are used only for non-debug builds
168 # Use '-Os
' optimization if available, else use -O2, allow Config to override
169 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
170 # Use the gcc 3.4 -funit-at-a-time optimization when available
171 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
173 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
174 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
176 ifeq ($(GCC_MAJOR_VER),4)
177 # shrinks code, results are from 4.0.2
179 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
181 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
183 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
187 # CPU_CFLAGS-y contain options which are not warnings,
188 # not include or library paths, and not optimizations.
190 # Why -funsigned-char: I hunted a bug related to incorrect
191 # sign extension of 'char
' type for 10 hours straight. Not fun.
192 CPU_CFLAGS-y := -funsigned-char -fno-builtin
194 CPU_CFLAGS-y += $(call check_gcc,-fno-asm,)
197 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
198 # If -msoft-float isn't supported
, we want an error anyway.
199 # Hmm... might need to revisit this for arm since it has 2 different
200 # soft float encodings.
201 ifneq ($(TARGET_ARCH
),nios
)
202 ifneq ($(TARGET_ARCH
),nios2
)
203 ifneq ($(TARGET_ARCH
),sh
)
204 CPU_CFLAGS-y
+= -msoft-float
208 ifeq ($(TARGET_ARCH
),arm
)
209 # No longer needed with current toolchains, but leave it here for now.
210 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
211 # LDADD_LIBFLOAT=-lfloat
215 CPU_CFLAGS-y
+= $(call check_gcc
,-std
=gnu99
,)
217 CPU_CFLAGS-
$(UCLIBC_FORMAT_SHARED_FLAT
) += -mid-shared-library
218 CPU_CFLAGS-
$(UCLIBC_FORMAT_FLAT_SEP_DATA
) += -msep-data
220 CPU_LDFLAGS-
$(ARCH_LITTLE_ENDIAN
) += -Wl
,-EL
221 CPU_LDFLAGS-
$(ARCH_BIG_ENDIAN
) += -Wl
,-EB
224 PICFLAG-
$(UCLIBC_FORMAT_FDPIC_ELF
) := -mfdpic
225 PICFLAG
:= $(PICFLAG-y
)
228 # Some nice CPU specific optimizations
229 ifeq ($(TARGET_ARCH
),i386
)
230 OPTIMIZATION
+=$(call check_gcc
,-fomit-frame-pointer
,)
232 ifeq ($(CONFIG_386
)$(CONFIG_486
)$(CONFIG_586
)$(CONFIG_586MMX
),y
)
233 # Non-SSE capable processor.
234 # NB: this may make SSE insns segfault!
235 # -O1 -march=pentium3, -Os -msse etc are known to be affected.
236 # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
237 # -m32 is needed if host is 64-bit
238 OPTIMIZATION
+=$(call check_gcc
,-m32
-mpreferred-stack-boundary
=2,)
240 OPTIMIZATION
+=$(call check_gcc
,-mpreferred-stack-boundary
=4,)
243 # Choice of alignment (please document why!)
244 # -falign-labels: in-line labels
245 # (reachable by normal code flow, aligning will insert nops
246 # which will be executed - may even make things slower)
247 # -falign-jumps: reachable only by a jump
248 # Generic: no alignment at all (smallest code)
249 GCC_FALIGN
=$(call check_gcc
,-falign-functions
=1 -falign-jumps
=1 -falign-labels
=1 -falign-loops
=1,-malign-jumps
=1 -malign-loops
=1)
250 ifeq ($(CONFIG_K7
),y
)
251 # Align functions to four bytes, use default for jumps and loops (why?)
252 GCC_FALIGN
=$(call check_gcc
,-falign-functions
=4 -falign-labels
=1,-malign-functions
=4)
254 ifeq ($(CONFIG_CRUSOE
),y
)
255 # Use compiler's default for functions, jumps and loops (why?)
256 GCC_FALIGN
=$(call check_gcc
,-falign-functions
=0 -falign-labels
=1,-malign-functions
=0)
258 ifeq ($(CONFIG_CYRIXIII
),y
)
259 # Use compiler's default for functions, jumps and loops (why?)
260 GCC_FALIGN
=$(call check_gcc
,-falign-functions
=0 -falign-labels
=1,-malign-functions
=0)
262 OPTIMIZATION
+=$(GCC_FALIGN
)
264 # Putting each function and data object into its own section
265 # allows for kbytes of less text if users link against static uclibc
266 # using ld --gc-sections.
267 # ld 2.18 can't do that (yet?) for shared libraries, so we itself
268 # do not use --gc-sections at shared lib link time.
269 # However, in combination with sections being sorted by alignment
270 # it does result in much reduced padding:
271 # text data bss dec hex
272 # 235319 1472 5992 242783 3b45f old.so
273 # 234104 1472 5980 241556 3af94 new.so
274 # Without -ffunction-sections, all functions will get aligned
275 # to 4 byte boundary by as/ld. This is arguably a bug in as.
276 # It specifies 4 byte align for .text even if not told to do so:
277 # Idx Name Size VMA LMA File off Algn
278 # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
279 CPU_CFLAGS-y
+= $(call check_gcc
,-ffunction-sections
-fdata-sections
,)
280 ifneq ($(call check_ld
,--sort-common
,),)
281 CPU_LDFLAGS-y
+= -Wl
,--sort-common
283 ifneq ($(call check_ld
,--sort-section alignment
),)
284 CPU_LDFLAGS-y
+= -Wl
,--sort-section
,alignment
289 CPU_CFLAGS-
$(CONFIG_386
)+=-march
=i386
290 CPU_CFLAGS-
$(CONFIG_486
)+=-march
=i486
291 CPU_CFLAGS-
$(CONFIG_ELAN
)+=-march
=i486
292 CPU_CFLAGS-
$(CONFIG_586
)+=-march
=i586
293 CPU_CFLAGS-
$(CONFIG_586MMX
)+=$(call check_gcc
,-march
=pentium-mmx
,-march
=i586
)
294 CPU_CFLAGS-
$(CONFIG_686
)+=-march
=i686
295 CPU_CFLAGS-
$(CONFIG_PENTIUMII
)+=$(call check_gcc
,-march
=pentium2
,-march
=i686
)
296 CPU_CFLAGS-
$(CONFIG_PENTIUMIII
)+=$(call check_gcc
,-march
=pentium3
,-march
=i686
)
297 CPU_CFLAGS-
$(CONFIG_PENTIUM4
)+=$(call check_gcc
,-march
=pentium4
,-march
=i686
)
298 CPU_CFLAGS-
$(CONFIG_K6
)+=$(call check_gcc
,-march
=k6
,-march
=i586
)
299 CPU_CFLAGS-
$(CONFIG_K7
)+=$(call check_gcc
,-march
=athlon
,-march
=i686
)
300 CPU_CFLAGS-
$(CONFIG_CRUSOE
)+=-march
=i686
301 CPU_CFLAGS-
$(CONFIG_WINCHIPC6
)+=$(call check_gcc
,-march
=winchip-c6
,-march
=i586
)
302 CPU_CFLAGS-
$(CONFIG_WINCHIP2
)+=$(call check_gcc
,-march
=winchip2
,-march
=i586
)
303 CPU_CFLAGS-
$(CONFIG_CYRIXIII
)+=$(call check_gcc
,-march
=c3
,-march
=i486
)
304 CPU_CFLAGS-
$(CONFIG_NEHEMIAH
)+=$(call check_gcc
,-march
=c3-2
,-march
=i686
)
307 ifeq ($(TARGET_ARCH
),sparc
)
308 CPU_CFLAGS-
$(CONFIG_SPARC_V7
)+=-mcpu
=v7
309 CPU_CFLAGS-
$(CONFIG_SPARC_V8
)+=-mcpu
=v8
310 CPU_CFLAGS-
$(CONFIG_SPARC_V9
)+=-mcpu
=v9
311 CPU_CFLAGS-
$(CONFIG_SPARC_V9B
)+=$(call check_gcc
,-mcpu
=v9b
,-mcpu
=ultrasparc
)
314 ifeq ($(TARGET_ARCH
),arm
)
315 OPTIMIZATION
+=-fstrict-aliasing
316 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
)+=-mlittle-endian
317 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
)+=-mbig-endian
318 CPU_CFLAGS-
$(CONFIG_GENERIC_ARM
)+=
319 CPU_CFLAGS-
$(CONFIG_ARM610
)+=-mtune
=arm610
-march
=armv3
320 CPU_CFLAGS-
$(CONFIG_ARM710
)+=-mtune
=arm710
-march
=armv3
321 CPU_CFLAGS-
$(CONFIG_ARM7TDMI
)+=-mtune
=arm7tdmi
-march
=armv4t
322 CPU_CFLAGS-
$(CONFIG_ARM720T
)+=-mtune
=arm7tdmi
-march
=armv4t
323 CPU_CFLAGS-
$(CONFIG_ARM920T
)+=-mtune
=arm9tdmi
-march
=armv4t
324 CPU_CFLAGS-
$(CONFIG_ARM922T
)+=-mtune
=arm9tdmi
-march
=armv4t
325 CPU_CFLAGS-
$(CONFIG_ARM926T
)+=-mtune
=arm9tdmi
-march
=armv5t
326 CPU_CFLAGS-
$(CONFIG_ARM10T
)+=-mtune
=arm10tdmi
-march
=armv5t
327 CPU_CFLAGS-
$(CONFIG_ARM1136JF_S
)+=-mtune
=arm1136jf-s
-march
=armv6
328 CPU_CFLAGS-
$(CONFIG_ARM1176JZ_S
)+=-mtune
=arm1176jz-s
-march
=armv6
329 CPU_CFLAGS-
$(CONFIG_ARM1176JZF_S
)+=-mtune
=arm1176jzf-s
-march
=armv6
330 CPU_CFLAGS-
$(CONFIG_ARM_SA110
)+=-mtune
=strongarm110
-march
=armv4
331 CPU_CFLAGS-
$(CONFIG_ARM_SA1100
)+=-mtune
=strongarm1100
-march
=armv4
332 CPU_CFLAGS-
$(CONFIG_ARM_XSCALE
)+=$(call check_gcc
,-mtune
=xscale
,-mtune
=strongarm110
)
333 CPU_CFLAGS-
$(CONFIG_ARM_XSCALE
)+=-march
=armv5te
-Wa
,-mcpu
=xscale
334 CPU_CFLAGS-
$(CONFIG_ARM_IWMMXT
)+=-march
=iwmmxt
-Wa
,-mcpu
=iwmmxt
-mabi
=iwmmxt
335 CPU_CFLAGS-
$(CONFIG_ARM_CORTEX_M3
)+=-mcpu
=cortex-m3
-mthumb
336 CPU_CFLAGS-
$(CONFIG_ARM_CORTEX_M1
)+=-mcpu
=cortex-m1
-mthumb
339 ifeq ($(TARGET_ARCH
),mips
)
340 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_1
)+=-mips1
341 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_2
)+=-mips2
-mtune
=mips2
342 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_3
)+=-mips3
-mtune
=mips3
343 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_4
)+=-mips4
-mtune
=mips4
344 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_MIPS32
)+=-mips32
-mtune
=mips32
345 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_MIPS32R2
)+=-march
=mips32r2
-mtune
=mips32r2
346 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_MIPS64
)+=-mips64
-mtune
=mips32
347 ifeq ($(strip $(ARCH_BIG_ENDIAN
)),y
)
348 CPU_LDFLAGS-
$(CONFIG_MIPS_N64_ABI
)+=-Wl
,-melf64btsmip
349 CPU_LDFLAGS-
$(CONFIG_MIPS_O32_ABI
)+=-Wl
,-melf32btsmip
351 ifeq ($(strip $(ARCH_LITTLE_ENDIAN
)),y
)
352 CPU_LDFLAGS-
$(CONFIG_MIPS_N64_ABI
)+=-Wl
,-melf64ltsmip
353 CPU_LDFLAGS-
$(CONFIG_MIPS_O32_ABI
)+=-Wl
,-melf32ltsmip
355 CPU_CFLAGS-
$(CONFIG_MIPS_N64_ABI
)+=-mabi
=64
356 CPU_CFLAGS-
$(CONFIG_MIPS_O32_ABI
)+=-mabi
=32
357 CPU_CFLAGS-
$(CONFIG_MIPS_N32_ABI
)+=-mabi
=n32
360 ifeq ($(TARGET_ARCH
),nios
)
361 CPU_LDFLAGS-y
+=-Wl
,-m32
362 CPU_CFLAGS-y
+=-Wl
,-m32
365 ifeq ($(TARGET_ARCH
),sh
)
366 OPTIMIZATION
+=-fstrict-aliasing
367 OPTIMIZATION
+= $(call check_gcc
,-mprefergot
,)
368 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
)+=-ml
369 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
)+=-mb
370 CPU_CFLAGS-
$(CONFIG_SH2
)+=-m2
371 CPU_CFLAGS-
$(CONFIG_SH3
)+=-m3
372 ifeq ($(UCLIBC_HAS_FPU
),y
)
373 CPU_CFLAGS-
$(CONFIG_SH2A
)+=-m2a
374 CPU_CFLAGS-
$(CONFIG_SH4
)+=-m4
376 CPU_CFLAGS-
$(CONFIG_SH2A
)+=-m2a-nofpu
377 CPU_CFLAGS-
$(CONFIG_SH4
)+=-m4-nofpu
381 ifeq ($(TARGET_ARCH
),sh64
)
382 OPTIMIZATION
+=-fstrict-aliasing
383 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
):=-ml
384 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
):=-mb
385 CPU_CFLAGS-
$(CONFIG_SH5
)+=-m5-32media
388 ifeq ($(TARGET_ARCH
),h8300
)
390 CPU_LDFLAGS-
$(CONFIG_H8300H
)+= -Wl
,-ms8300h
391 CPU_LDFLAGS-
$(CONFIG_H8S
) += -Wl
,-ms8300s
392 CPU_CFLAGS-
$(CONFIG_H8300H
) += -mh
-mint32
393 CPU_CFLAGS-
$(CONFIG_H8S
) += -ms
-mint32
396 ifeq ($(TARGET_ARCH
),cris
)
397 CPU_LDFLAGS-
$(CONFIG_CRIS
)+=-Wl
,-mcrislinux
398 CPU_LDFLAGS-
$(CONFIG_CRISV32
)+=-Wl
,-mcrislinux
399 CPU_CFLAGS-
$(CONFIG_CRIS
)+=-mlinux
404 ifeq ($(TARGET_ARCH
),m68k
)
405 # -fPIC is only supported for 68020 and above. It is not supported
406 # for 68000, 68010, or Coldfire.
411 ifeq ($(TARGET_ARCH
),powerpc
)
412 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
413 # enough. Therefore use -fpic which will reduce code size and generates
417 PPC_HAS_REL16
:=$(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
)
418 CPU_CFLAGS-
$(PPC_HAS_REL16
)+= -DHAVE_ASM_PPC_REL16
419 CPU_CFLAGS-
$(CONFIG_E500
) += "-D__NO_MATH_INLINES"
423 ifeq ($(TARGET_ARCH
),bfin
)
425 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF
),y
)
426 CPU_CFLAGS-y
:=-mfdpic
427 CPU_LDFLAGS-y
+= -Wl
,-melf32bfinfd
431 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT
),y
)
432 PICFLAG
:= -mleaf-id-shared-library
436 ifeq ($(TARGET_ARCH
),frv
)
437 CPU_LDFLAGS-
$(CONFIG_FRV
)+=-Wl
,-melf32frvfd
438 # Using -pie causes the program to have an interpreter, which is
439 # forbidden, so we must make do with -shared. Unfortunately,
440 # -shared by itself would get us global function descriptors
441 # and calls through PLTs, dynamic resolution of symbols, etc,
442 # which would break as well, but -Bsymbolic comes to the rescue.
443 export LDPIEFLAG
:=-shared
-Wl
,-Bsymbolic
447 ifeq ($(strip $(TARGET_ARCH
)),avr32
)
448 CPU_CFLAGS-
$(CONFIG_AVR32_AP7
) += -march
=ap
449 CPU_CFLAGS-
$(CONFIG_LINKRELAX
) += -mrelax
450 CPU_LDFLAGS-
$(CONFIG_LINKRELAX
) += --relax
453 ifeq ($(TARGET_ARCH
),i960
)
457 ifeq ($(TARGET_ARCH
),microblaze
)
461 ifeq ($(TARGET_ARCH
),v850
)
465 # Keep the check_gcc from being needlessly executed
467 export PIEFLAG
:=$(call check_gcc
,$(PIEFLAG_NAME
),$(PICFLAG
))
469 # We need to keep track of both the CC PIE flag (above) as
470 # well as the LD PIE flag (below) because we can't rely on
471 # gcc passing -pie if we used -fPIE. We need to directly use -pie
472 # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
474 export LDPIEFLAG
:=$(shell $(LD
) --help
2>/dev
/null | grep
-q
-- -pie
&& echo
"-pie")
477 # Check for --as-needed support in linker
478 ifndef LD_FLAG_ASNEEDED
479 _LD_FLAG_ASNEEDED
:=$(shell $(LD
) --help
2>/dev
/null | grep
-- --as-needed
)
480 ifneq ($(_LD_FLAG_ASNEEDED
),)
481 export LD_FLAG_ASNEEDED
:=--as-needed
484 ifndef LD_FLAG_NO_ASNEEDED
485 ifdef LD_FLAG_ASNEEDED
486 export LD_FLAG_NO_ASNEEDED
:=--no-as-needed
489 ifndef CC_FLAG_ASNEEDED
490 ifdef LD_FLAG_ASNEEDED
491 export CC_FLAG_ASNEEDED
:=-Wl
,$(LD_FLAG_ASNEEDED
)
494 ifndef CC_FLAG_NO_ASNEEDED
495 ifdef LD_FLAG_NO_ASNEEDED
496 export CC_FLAG_NO_ASNEEDED
:=-Wl
,$(LD_FLAG_NO_ASNEEDED
)
499 link.asneeded
= $(if
$(and
$(CC_FLAG_ASNEEDED
),$(CC_FLAG_NO_ASNEEDED
)),$(CC_FLAG_ASNEEDED
) $(1) $(CC_FLAG_NO_ASNEEDED
))
501 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
503 export ASNEEDED
:=$(shell $(LD
) --help
2>/dev
/null | grep
-q
-- --as-needed
&& echo
"AS_NEEDED ( $(UCLIBC_LDSO) )" || echo
"$(UCLIBC_LDSO)")
506 # Add a bunch of extra pedantic annoyingly strict checks
507 XWARNINGS
=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
508 ifeq ($(EXTRA_WARNINGS),y)
509 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
510 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
511 XWARNINGS+=-Wnonnull -Wundef
512 # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
513 #XWARNINGS+=-Wdeclaration-after-statement
515 # Seems to be unused (no ARCH_CFLAGS anywhere), delete?
516 # if yes, remove after 0.9.31
517 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS
)))
518 CPU_CFLAGS
=$(subst ",, $(strip $(CPU_CFLAGS-y)))
520 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
521 ifeq ($(UCLIBC_BUILD_SSP),y)
522 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
523 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
524 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
526 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
529 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
531 # Collect all CFLAGS components
532 CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
533 $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
534 -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
535 -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
536 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
537 CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS
))
540 # We need this to be checked within libc-symbols.h
541 ifneq ($(HAVE_SHARED
),y
)
545 LDFLAGS_NOSTRIP
:=$(CPU_LDFLAGS-y
) -shared \
546 -Wl
,--warn-common
-Wl
,--warn-once
-Wl
,-z
,combreloc
547 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
548 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
550 ifeq ($(UCLIBC_BUILD_RELRO
),y
)
551 LDFLAGS_NOSTRIP
+=-Wl
,-z
,relro
554 ifeq ($(UCLIBC_BUILD_NOW
),y
)
555 LDFLAGS_NOSTRIP
+=-Wl
,-z
,now
558 ifeq ($(LDSO_GNU_HASH_SUPPORT
),y
)
559 # Be sure that binutils support it
560 LDFLAGS_GNUHASH
:=$(call check_ld
,--hash-style
=gnu
)
561 ifeq ($(LDFLAGS_GNUHASH
),)
562 ifneq ($(filter-out install_headers headers-y
,$(MAKECMDGOALS
)),)
563 $(error Your binutils don
't support --hash-style option, while you want to use it)
566 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
570 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
574 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
579 STRIPTOOL := true -Stripping_disabled
583 # we try to compile all sources at once into an object (IMA), but
584 # gcc-3.3.x does not support it
585 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
586 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
587 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
588 ifeq ($(GCC_MAJOR_VER),3)
591 CFLAGS+=$(call check_gcc,--combine,)
597 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
598 LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
601 ifeq ($(UCLIBC_HAS_THREADS),y)
602 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
605 ifeq ($(LINUXTHREADS_OLD),y)
606 PTNAME := linuxthreads.old
608 PTNAME := linuxthreads
611 PTDIR := libpthread/$(PTNAME)
612 # set up system dependencies include dirs (NOTE: order matters!)
613 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
614 PTINC:= -I$(top_srcdir)$(PTDIR) \
615 -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
616 -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
617 -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
618 -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
619 -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits \
620 -I$(top_srcdir)$(PTDIR)/sysdeps/generic \
621 -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
622 -I$(top_srcdir)ldso/include
624 # Test for TLS if NPTL support was selected.
626 GCC_HAS_TLS=$(shell \
627 echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
628 ifneq ($(GCC_HAS_TLS),)
631 @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
632 @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
633 @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
634 @echo "#### about this problem.";
636 @echo "#### Exiting...";
642 -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
643 -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
644 -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
645 -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
646 -I$(top_srcdir)$(PTDIR) \
647 -I$(top_srcdir)libpthread
654 CFLAGS += -I$(KERNEL_HEADERS)
656 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
657 CC_IPREFIX := $(shell $(CC) --print-file-name=include)
658 CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
661 ifneq ($(DOASSERTS),y)
665 ifeq ($(SYMBOL_PREFIX),_)
666 CFLAGS+=-D__UCLIBC_UNDERSCORES__
669 # Keep the check_as from being needlessly executed
670 ifndef ASFLAGS_NOEXEC
671 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
672 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
674 export ASFLAGS_NOEXEC :=
677 ASFLAGS = $(ASFLAGS_NOEXEC)
679 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
680 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
681 LIBGCC_DIR:=$(dir $(LIBGCC))
683 # moved from libpthread/linuxthreads
684 ifeq ($(UCLIBC_CTOR_DTOR),y)
685 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
686 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
689 LOCAL_INSTALL_PATH := install_dir