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.
30 clean_targets
:= clean realclean distclean \
31 objclean-y headers_clean-y CLEAN_utils
32 noconfig_targets
:= menuconfig config nconfig \
33 oldaskconfig silentoldconfig oldconfig allnoconfig allyesconfig \
34 alldefconfig randconfig defconfig savedefconfig listnewconfig \
36 xconfig gconfig update-po-config mconf qconf gconf nconf conf \
37 release
dist tags help
40 #-----------------------------------------------------------
41 # If you are running a cross compiler, you will want to set
42 # 'CROSS_COMPILE' to something more interesting ... Target
43 # architecture is determined by asking the CC compiler what
44 # arch it compiles things for, so unless your compiler is
45 # broken, you should not need to specify TARGET_ARCH.
47 # Most people will set this stuff on the command line, i.e.
48 # make CROSS_COMPILE=arm-linux-
49 # will build uClibc for 'arm'.
50 # CROSS is still supported for backward compatibily only
52 CROSS_COMPILE ?
= $(CROSS
)
54 CC
= $(CROSS_COMPILE
)gcc
55 AR
= $(CROSS_COMPILE
)ar
56 LD
= $(CROSS_COMPILE
)ld
57 NM
= $(CROSS_COMPILE
)nm
58 OBJDUMP
= $(CROSS_COMPILE
)objdump
59 STRIPTOOL
= $(CROSS_COMPILE
)strip
68 STRIP_FLAGS ?
= -x
-R .note
-R .comment
70 # Select the compiler needed to build binaries for your development system
74 #---------------------------------------------------------
75 # Nothing beyond this point should ever be touched by mere
76 # mortals. Unless you hang out with the gods, you should
77 # probably leave all this stuff alone.
80 qstrip
= $(strip $(subst ",,$(1)))
84 KCONFIG_CONFIG ?
= $(top_builddir
).config
85 KCONFIG_CONFIG
:= $(abspath
$(KCONFIG_CONFIG
))
87 KCONFIG_AUTOCONFIG
:= $(dir $(KCONFIG_CONFIG
))include/config
/auto.conf
88 export KCONFIG_AUTOCONFIG
89 KCONFIG_TRISTATE
:= $(dir $(KCONFIG_CONFIG
))include/config
/tristate.conf
90 export KCONFIG_TRISTATE
91 srctree
:= $(abspath
$(top_srcdir
))
93 KCONFIG_AUTOHEADER
:= $(dir $(KCONFIG_CONFIG
))include/generated
/autoconf.h
94 export KCONFIG_AUTOHEADER
95 Kconfig
:= $(abspath
$(top_srcdir
)extra
/Configs
/Config.in
)
97 # Pull in the user's uClibc configuration
98 ifeq ($(filter $(noconfig_targets
) clean CLEAN_
%,$(MAKECMDGOALS
)),)
99 -include $(KCONFIG_CONFIG
)
102 TARGET_ARCH
:=$(call qstrip
,$(TARGET_ARCH
))
103 ifeq ($(TARGET_ARCH
),)
104 ARCH ?
= $(shell uname
-m |
$(SED
) -e s
/i
.86/i386
/ \
105 -e s
/sun.
*/sparc
/ -e s
/sparc.
*/sparc
/ \
106 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
107 -e s
/nds32.
*/nds32
/ \
109 -e s
/s390x
/s390
/ -e s
/parisc.
*/hppa
/ \
110 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ \
111 -e s
/xtensa.
*/xtensa
/ )
113 ARCH
= $(TARGET_ARCH
)
117 # Make certain these contain a final "/", but no "//"s.
118 scrub_path
= $(strip $(subst //,/, $(subst ,/, $(call qstrip
,$(1)))))
119 TARGET_SUBARCH
:= $(call qstrip
,$(TARGET_SUBARCH
))
120 RUNTIME_PREFIX
:= $(call scrub_path
,$(RUNTIME_PREFIX
))
121 DEVEL_PREFIX
:= $(call scrub_path
,$(DEVEL_PREFIX
))
122 MULTILIB_DIR
:= $(call scrub_path
,$(MULTILIB_DIR
))
123 KERNEL_HEADERS
:= $(call scrub_path
,$(KERNEL_HEADERS
))
124 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
127 # Now config hard core
132 VERSION
:= $(MAJOR_VERSION
).
$(MINOR_VERSION
).
$(SUBLEVEL
)
133 ABI_VERSION
:= $(MAJOR_VERSION
)
134 ifneq ($(EXTRAVERSION
),)
135 VERSION
:= $(VERSION
)$(EXTRAVERSION
)
137 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
139 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL
142 SHARED_LIBNAME
:= $(LIBC
).so.
$(ABI_VERSION
)
143 UBACKTRACE_DSO
:= libubacktrace.so.
$(ABI_VERSION
)
145 UCLIBC_LDSO_NAME
:= ld-uClibc
146 ARCH_NATIVE_BIT
:= 32
147 ifneq ($(findstring $(TARGET_ARCH
) , hppa64 ia64 powerpc64 s390x sparc64 x86_64
),)
148 UCLIBC_LDSO_NAME
:= ld64-uClibc
149 ARCH_NATIVE_BIT
:= 64
151 ifeq ($(CONFIG_MIPS_N64_ABI
),y
)
152 UCLIBC_LDSO_NAME
:= ld64-uClibc
153 ARCH_NATIVE_BIT
:= 64
157 UCLIBC_LDSO
:= $(UCLIBC_LDSO_NAME
).so.
$(ABI_VERSION
)
158 NONSHARED_LIBNAME
:= uclibc_nonshared.a
159 libc
:= $(top_builddir
)lib
/$(SHARED_LIBNAME
)
160 libc.depend
:= $(top_builddir
)lib
/$(SHARED_LIBNAME
:.
$(ABI_VERSION
)=)
161 ifneq ($(ARCH_HAS_NO_SHARED
),y
)
162 libdl.depend
:= $(top_builddir
)lib
/libdl.so
164 ifneq ($(HAS_NO_THREADS
),y
)
165 libpthread.depend
:= $(top_builddir
)lib
/libpthread.so
167 interp
:= $(top_builddir
)lib
/interp.os
168 ldso
:= $(top_builddir
)lib
/$(UCLIBC_LDSO
)
169 headers_dep
:= $(top_builddir
)include/bits
/sysnum.h \
170 $(top_builddir
)include/bits
/uClibc_config.h
171 sub_headers
:= $(headers_dep
)
173 LIBS
:= $(interp
) -L
$(top_builddir
)lib
$(libc
:.
$(ABI_VERSION
)=)
175 # Make sure DESTDIR and PREFIX can be used to install
176 # PREFIX is a uClibcism while DESTDIR is a common GNUism
181 ifneq ($(HAVE_SHARED
),y
)
190 ifeq ($(CROSS_COMPILE
),)
191 CROSS_COMPILE
=$(call qstrip
,$(CROSS_COMPILER_PREFIX
))
194 # A nifty macro to make testing gcc features easier
196 if
$(CC
) $(1) -S
-o
/dev
/null
-xc
/dev
/null
> /dev
/null
2>&1; \
197 then echo
"$(1)"; else echo
"$(2)"; fi
)
199 if
$(CC
) -Wa
,$(1) -Wa
,-Z
-c
-o
/dev
/null
-xassembler
/dev
/null
> /dev
/null
2>&1; \
200 then echo
"-Wa,$(1)"; fi
)
202 if
$(CC
) $(LDFLAG-fuse-ld
) $(CFLAG_-Wl--no-warn-mismatch
) -Wl
,$(1) $(CFLAG_-nostdlib
) -o
/dev
/null
-Wl
,-b
,binary
/dev
/null
> /dev
/null
2>&1; \
203 then echo
"$(1)"; fi
)
205 # Use variable indirection here so that we can have variable
206 # names with fun chars in them like equal signs
207 define check-tool-var
208 ifeq ($(filter $(clean_targets
) CLEAN_
%,$(MAKECMDGOALS
)),)
211 $$(_v
) := $$(call
$(1),$(subst %, ,$(3)))
217 # Usage: check-gcc-var,<flag>
218 # Check the C compiler to see if it supports <flag>.
219 # Export the variable CFLAG_<flag> if it does.
221 $(call check-tool-var
,check_gcc
,CFLAG
,$(1))
223 # Usage: check-as-var,<flag>
224 # Check the assembler to see if it supports <flag>. Export the
225 # variable ASFLAG_<flag> if it does (for invoking the assembler),
226 # as well CFLAG_-Wa<flag> (for invoking the compiler driver).
228 $(call check-tool-var
,check_as
,ASFLAG
,$(1))
230 export $$(_v
) = $$(if
$$(ASFLAG_
$(1)),-Wa
$$(comma
)$$(ASFLAG_
$(1)))
232 # Usage: check-ld-var,<flag>
233 # Check the linker to see if it supports <flag>. Export the
234 # variable LDFLAG_<flag> if it does (for invoking the linker),
235 # as well CFLAG_-Wl<flag> (for invoking the compiler driver).
237 $(call check-tool-var
,check_ld
,LDFLAG
,$(1))
239 export $$(_v
) = $$(if
$$(LDFLAG_
$(1)),-Wl
$$(comma
)$$(LDFLAG_
$(1)))
241 # Usage: cache-output-var,<variable>,<shell command>
242 # Execute <shell command> and cache the output in <variable>.
243 define cache-output-var
245 $(1) := $$(shell $(2))
253 # Note: The check for -nostdlib has to be before all calls to check_ld
254 $(eval
$(call check-gcc-var
,-nostdlib
))
255 $(eval
$(call check-gcc-var
,-nostartfiles
))
256 # deliberately not named CFLAG-fuse-ld since unchecked and from user
257 LDFLAG-fuse-ld
:= $(filter -fuse-ld
=%,$(call qstrip
,$(UCLIBC_EXTRA_CFLAGS
)))
258 # failed to merge target specific data of file /dev/null
259 # Could use -Wl,--script,$(top_srcdir)extra/scripts/none.lds as well.
260 $(eval
$(call check-ld-var
,--no-warn-mismatch
))
262 $(eval
$(call cache-output-var
,GCC_VER
,$(CC
) -dumpversion
))
263 GCC_VER
:= $(subst .
, ,$(GCC_VER
))
264 GCC_MAJOR_VER ?
= $(word 1,$(GCC_VER
))
265 GCC_MINOR_VER ?
= $(word 2,$(GCC_VER
))
267 # Flags in OPTIMIZATION are used only for non-debug builds
270 OPTIMIZATION-
$(GCC_MAJOR_VER
):=
271 OPTIMIZATION-
$(GCC_MAJOR_VER
).
$(GCC_MINOR_VER
):=
273 # Use '-Os' optimization if available, else use -O2, allow Config to override
274 $(eval
$(call check-gcc-var
,-Os
))
275 ifneq ($(CFLAG_-Os
),)
276 OPTIMIZATION
+= $(CFLAG_-Os
)
278 $(eval
$(call check-gcc-var
,-O2
))
279 OPTIMIZATION
+= $(CFLAG_-O2
)
281 # Use the gcc 3.4 -funit-at-a-time optimization when available
282 $(eval
$(call check-gcc-var
,-funit-at-a-time
))
283 OPTIMIZATION-3.4
+= $(CFLAG_-funit-at-a-time
)
284 $(eval
$(call check-gcc-var
,-fstrict-aliasing
))
285 OPTIMIZATION
+= $(CFLAG_-fstrict-aliasing
)
287 # CPU_CFLAGS-y contain options which are not warnings,
288 # not include or library paths, and not optimizations.
290 # Why -funsigned-char: I hunted a bug related to incorrect
291 # sign extension of 'char' type for 10 hours straight. Not fun.
292 CPU_CFLAGS-y
:= -funsigned-char
-fno-builtin
294 $(eval
$(call check-gcc-var
,-fno-asm
))
295 CPU_CFLAGS-y
+= $(CFLAG_-fno-asm
)
296 $(eval
$(call check-gcc-var
,-fmerge-all-constants
))
297 CPU_CFLAGS-y
+= $(CFLAG_-fmerge-all-constants
)
299 ifeq ($(UCLIBC_HAS_SOFT_FLOAT
),y
)
300 ifneq ($(TARGET_ARCH
),bfin
)
301 ifneq ($(TARGET_ARCH
),lm32
)
302 ifneq ($(TARGET_ARCH
),nios2
)
303 ifneq ($(TARGET_ARCH
),nds32
)
304 ifneq ($(TARGET_ARCH
),sh
)
305 ifneq ($(TARGET_ARCH
),c6x
)
306 ifneq ($(TARGET_ARCH
),h8300
)
307 ifneq ($(TARGET_ARCH
),arc
)
308 CPU_CFLAGS-y
+= -msoft-float
319 $(eval
$(call check-gcc-var
,-std
=gnu99
))
320 CPU_CFLAGS-y
+= $(CFLAG_-std
=gnu99
)
322 CPU_CFLAGS-
$(UCLIBC_FORMAT_SHARED_FLAT
) += -mid-shared-library
323 CPU_CFLAGS-
$(UCLIBC_FORMAT_FLAT_SEP_DATA
) += -msep-data
325 CPU_LDFLAGS-
$(ARCH_LITTLE_ENDIAN
) += -Wl
,-EL
326 CPU_LDFLAGS-
$(ARCH_BIG_ENDIAN
) += -Wl
,-EB
329 PICFLAG-
$(UCLIBC_FORMAT_FDPIC_ELF
) := -mfdpic
330 PICFLAG-
$(UCLIBC_FORMAT_DSBT_ELF
) := -mdsbt
-fpic
331 PICFLAG
:= $(PICFLAG-y
)
334 $(eval
$(call check-gcc-var
,-fdata-sections
))
335 $(eval
$(call check-gcc-var
,-ffunction-sections
))
337 # Some nice CPU specific optimizations
338 ifeq ($(TARGET_ARCH
),i386
)
339 $(eval
$(call check-gcc-var
,-fomit-frame-pointer
))
340 OPTIMIZATION
+= $(CFLAG_-fomit-frame-pointer
)
342 ifeq ($(CONFIG_386
)$(CONFIG_486
)$(CONFIG_586
),y
)
343 # TODO: Change this to a gcc version check. This bug
344 # should be fixed with at least gcc-4.3.
345 # Non-SSE capable processor.
346 # NB: this may make SSE insns segfault!
347 # -O1 -march=pentium3, -Os -msse etc are known to be affected.
348 # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
349 # -m32 is needed if host is 64-bit
350 OPTIMIZATION
+=$(call check_gcc
,-m32
-mpreferred-stack-boundary
=2,)
352 $(eval
$(call check-gcc-var
,-mpreferred-stack-boundary
=4))
353 OPTIMIZATION
+= $(CFLAG_-mpreferred-stack-boundary
=4)
356 # Choice of alignment (please document why!)
357 # -falign-labels: in-line labels
358 # (reachable by normal code flow, aligning will insert nops
359 # which will be executed - may even make things slower)
360 # -falign-jumps: reachable only by a jump
361 # Generic: no alignment at all (smallest code)
362 GCC_FALIGN
=$(call check_gcc
,-falign-functions
=1 -falign-jumps
=1 -falign-labels
=1 -falign-loops
=1,-malign-jumps
=1 -malign-loops
=1)
363 OPTIMIZATION
+=$(GCC_FALIGN
)
365 # Putting each function and data object into its own section
366 # allows for kbytes of less text if users link against static uclibc
367 # using ld --gc-sections.
368 # ld 2.18 can't do that (yet?) for shared libraries, so we itself
369 # do not use --gc-sections at shared lib link time.
370 # However, in combination with sections being sorted by alignment
371 # it does result in much reduced padding:
372 # text data bss dec hex
373 # 235319 1472 5992 242783 3b45f old.so
374 # 234104 1472 5980 241556 3af94 new.so
375 # Without -ffunction-sections, all functions will get aligned
376 # to 4 byte boundary by as/ld. This is arguably a bug in as.
377 # It specifies 4 byte align for .text even if not told to do so:
378 # Idx Name Size VMA LMA File off Algn
379 # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
380 CPU_CFLAGS-y
+= $(CFLAG_-ffunction-sections
) $(CFLAG_-fdata-sections
)
381 CPU_LDFLAGS-y
+= $(CFLAG_-Wl--sort-common
)
382 $(eval
$(call check-ld-var
,--sort-section
=alignment
))
383 CPU_LDFLAGS-y
+= $(CFLAG_-Wl--sort-section
=alignment
)
389 ifeq ($(TARGET_ARCH
),sparc
)
390 CPU_CFLAGS-
$(CONFIG_SPARC_V7
)+=-mcpu
=v7
391 CPU_CFLAGS-
$(CONFIG_SPARC_V8
)+=-mcpu
=v8
392 CPU_CFLAGS-
$(CONFIG_SPARC_V9
)+=-mcpu
=v9
393 CPU_CFLAGS-
$(CONFIG_SPARC_V9B
)+=$(call check_gcc
,-mcpu
=v9b
,-mcpu
=ultrasparc
)
396 ifeq ($(TARGET_ARCH
),arm
)
397 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
)+=-mlittle-endian
398 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
)+=-mbig-endian
401 ifeq ($(TARGET_ARCH
),metag
)
403 CPU_CFLAGS-
$(CONFIG_META_1_2
)+=
404 CPU_CFLAGS-
$(CONFIG_META_2_1
)+=-Wa
,-mcpu
=metac21
407 ifeq ($(TARGET_ARCH
),mips
)
408 OPTIMIZATION
+=-mno-split-addresses
409 CPU_CFLAGS-
$(CONFIG_MIPS_N64_ABI
)+=-mabi
=64
410 CPU_CFLAGS-
$(CONFIG_MIPS_O32_ABI
)+=-mabi
=32
411 CPU_CFLAGS-
$(CONFIG_MIPS_N32_ABI
)+=-mabi
=n32
412 CPU_LDFLAGS-y
+= $(CPU_CFLAGS
)
415 ifeq ($(TARGET_ARCH
),nds32
)
416 CPU_CFLAGS-
$(CONFIG_NDS32_ISA
)+=-march
=nds32
421 ifeq ($(TARGET_ARCH
),sh
)
422 $(eval
$(call check-gcc-var
,-mprefergot
))
423 OPTIMIZATION
+= $(CFLAG_-mprefergot
)
424 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
)+=-ml
425 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
)+=-mb
426 CPU_CFLAGS-
$(CONFIG_SH2
)+=-m2
427 CPU_CFLAGS-
$(CONFIG_SH3
)+=-m3
428 ifeq ($(UCLIBC_HAS_FPU
),y
)
429 CPU_CFLAGS-
$(CONFIG_SH2A
)+=-m2a
430 CPU_CFLAGS-
$(CONFIG_SH4
)+=-m4
431 CPU_CFLAGS-
$(CONFIG_SH4A
)+=-m4a
433 CPU_CFLAGS-
$(CONFIG_SH2A
)+=-m2a-nofpu
434 CPU_CFLAGS-
$(CONFIG_SH4
)+=-m4-nofpu
435 CPU_CFLAGS-
$(CONFIG_SH4A
)+=-m4a-nofpu
439 ifeq ($(TARGET_ARCH
),h8300
)
440 CPU_CFLAGS-
$(CONFIG_H8300H
) += -mh
-mint32
441 CPU_CFLAGS-
$(CONFIG_H8S
) += -ms
-mint32
444 ifeq ($(TARGET_ARCH
),cris
)
445 CPU_LDFLAGS-
$(CONFIG_CRIS
)+=-Wl
,-mcrislinux
446 CPU_LDFLAGS-
$(CONFIG_CRISV32
)+=-Wl
,-mcrislinux
447 CPU_CFLAGS-
$(CONFIG_CRIS
)+=-mlinux
452 ifeq ($(TARGET_ARCH
),m68k
)
453 # -fPIC is only supported for 68020 and above. It is not supported
454 # for 68000, 68010, or Coldfire.
459 ifeq ($(TARGET_ARCH
),powerpc
)
460 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
461 # enough. Therefore use -fpic which will reduce code size and generates
465 PPC_HAS_REL16
:=$(shell printf
"\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha\n" |
$(CC
) -c
-x assembler
-o
/dev
/null
- 2> /dev
/null
&& echo
-n y || echo
-n n
)
466 CPU_CFLAGS-
$(PPC_HAS_REL16
)+= -DHAVE_ASM_PPC_REL16
467 CPU_CFLAGS-
$(CONFIG_E500
) += "-D__NO_MATH_INLINES"
471 ifeq ($(TARGET_ARCH
),bfin
)
473 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF
),y
)
474 CPU_CFLAGS-y
:=-mfdpic
475 CPU_LDFLAGS-y
+= -Wl
,-melf32bfinfd
479 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT
),y
)
480 PICFLAG
:= -mleaf-id-shared-library
484 ifeq ($(TARGET_ARCH
),frv
)
485 # Using -pie causes the program to have an interpreter, which is
486 # forbidden, so we must make do with -shared. Unfortunately,
487 # -shared by itself would get us global function descriptors
488 # and calls through PLTs, dynamic resolution of symbols, etc,
489 # which would break as well, but -Bsymbolic comes to the rescue.
490 CPU_LDFLAGS-y
+= -Wl
,-melf32frvfd
-Wl
,-Bsymbolic
493 ifeq ($(strip $(TARGET_ARCH
)),avr32
)
494 CPU_CFLAGS-
$(CONFIG_AVR32_AP7
) += -march
=ap
495 CPU_CFLAGS-
$(CONFIG_LINKRELAX
) += -mrelax
496 CPU_LDFLAGS-
$(CONFIG_LINKRELAX
) += --relax
499 ifeq ($(TARGET_ARCH
),c6x
)
501 CPU_CFLAGS-
$(CONFIG_TMS320C64X
) += -march
=c64x
502 CPU_CFLAGS-
$(CONFIG_TMS320C64XPLUS
) += -march
=c64x
+
503 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
)+=-mlittle-endian
504 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
)+=-mbig-endian
505 CPU_LDFLAGS-y
+= $(CPU_CFLAGS
)
508 ifeq ($(TARGET_ARCH
),arc
)
509 CPU_CFLAGS-y
+= -mlock
-mswape
510 CPU_CFLAGS-
$(CONFIG_ARC_CPU_700
) += -mA7
511 CPU_CFLAGS-
$(CONFIG_ARC_CPU_HS
) += -mcpu
=archs
512 CPU_LDFLAGS-y
+= $(CPU_CFLAGS
) -marclinux
515 $(eval
$(call check-gcc-var
,$(PIEFLAG_NAME
)))
516 PIEFLAG
:= $(CFLAG_
$(PIEFLAG_NAME
))
518 PIEFLAG
:= $(PICFLAG
)
520 # We need to keep track of both the CC PIE flag (above) as
521 # well as the LD PIE flag (below) because we can't rely on
522 # gcc passing -pie if we used -fPIE. We need to directly use -pie
523 # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
524 $(eval
$(call cache-output-var
,LDPIEFLAG
,$(CC
) -Wl
$(comma
)--help
2>/dev
/null | grep
-q
-- -pie
&& echo
"-pie"))
526 # Check for --as-needed support in linker
527 ifndef LD_FLAG_ASNEEDED
528 _LD_FLAG_ASNEEDED
:=$(shell $(CC
) -Wl
,--help
2>/dev
/null | grep
-- --as-needed
)
529 ifneq ($(_LD_FLAG_ASNEEDED
),)
530 export LD_FLAG_ASNEEDED
:=--as-needed
533 ifndef LD_FLAG_NO_ASNEEDED
534 ifdef LD_FLAG_ASNEEDED
535 export LD_FLAG_NO_ASNEEDED
:=--no-as-needed
538 ifndef CC_FLAG_ASNEEDED
539 ifdef LD_FLAG_ASNEEDED
540 export CC_FLAG_ASNEEDED
:=-Wl
,$(LD_FLAG_ASNEEDED
)
543 ifndef CC_FLAG_NO_ASNEEDED
544 ifdef LD_FLAG_NO_ASNEEDED
545 export CC_FLAG_NO_ASNEEDED
:=-Wl
,$(LD_FLAG_NO_ASNEEDED
)
548 link.asneeded
= $(if
$(CC_FLAG_ASNEEDED
),$(if
$(CC_FLAG_NO_ASNEEDED
),$(CC_FLAG_ASNEEDED
) $(1) $(CC_FLAG_NO_ASNEEDED
)))
550 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
552 export ASNEEDED
:=$(shell $(CC
) -Wl
,--help
2>/dev
/null | grep
-q
-- --as-needed
&& echo
"AS_NEEDED ( $(UCLIBC_LDSO) )" || echo
"$(UCLIBC_LDSO)")
554 # Only used in installed libc.so linker script
555 ifeq ($(UCLIBC_HAS_BACKTRACE
),y
)
556 ifeq ($(HARDWIRED_ABSPATH
),y
)
557 UBACKTRACE_FULL_NAME
:= $(subst //,/,$(RUNTIME_PREFIX
)$(MULTILIB_DIR
)/$(UBACKTRACE_DSO
))
559 UBACKTRACE_FULL_NAME
:= $(UBACKTRACE_DSO
)
561 export UBACKTRACE_ASNEEDED
:=$(shell $(CC
) -Wl
,--help
2>/dev
/null | grep
-q
-- --as-needed
&& \
562 echo
"GROUP ( AS_NEEDED ( $(UBACKTRACE_FULL_NAME) ) )" || \
563 echo
"GROUP ( $(UBACKTRACE_FULL_NAME) )")
565 export UBACKTRACE_ASNEEDED
:=""
567 ifeq ($(UCLIBC_HAS_ARGP
),y
)
568 ifeq ($(HARDWIRED_ABSPATH
),y
)
569 # Only used in installed libc.so linker script
570 UARGP_FULL_NAME
:= $(subst //,/,$(RUNTIME_PREFIX
)$(MULTILIB_DIR
)/libuargp.so.
$(MAJOR_VERSION
))
572 UARGP_FULL_NAME
:= libuargp.so.
$(MAJOR_VERSION
)
574 export UARGP_ASNEEDED
:=$(shell $(CC
) -Wl
,--help
2>/dev
/null | grep
-q
-- --as-needed
&& \
575 echo
"GROUP ( AS_NEEDED ( $(UARGP_FULL_NAME) ) )" || \
576 echo
"GROUP ( $(UARGP_FULL_NAME) )")
578 export UARGP_ASNEEDED
:=""
582 # Add a bunch of extra pedantic annoyingly strict checks
583 WARNING_FLAGS
= -Wstrict-prototypes
-Wstrict-aliasing
584 ifeq ($(EXTRA_WARNINGS
),y
)
588 -Wmissing-format-attribute \
589 -Wmissing-prototypes \
590 -Wmissing-declarations \
593 -Wold-style-declaration \
594 -Wold-style-definition \
595 -Wdeclaration-after-statement \
599 WARNING_FLAGS
+= $(WARNING_FLAGS-gcc-
$(GCC_MAJOR_VER
))
600 $(foreach w
,$(WARNING_FLAGS
),$(eval
$(call check-gcc-var
,$(w
))))
601 XWARNINGS
= $(call qstrip
,$(WARNINGS
)) $(foreach w
,$(WARNING_FLAGS
),$(CFLAG_
$(w
)))
603 CPU_CFLAGS
=$(call qstrip
,$(CPU_CFLAGS-y
))
605 # Save the tested flag in a single variable and force it to be
606 # evaluated just once. Then use that computed value.
607 $(eval
$(call check-gcc-var
,-fno-stack-protector
))
608 SSP_DISABLE_FLAGS ?
= $(CFLAG_-fno-stack-protector
)
609 ifeq ($(UCLIBC_BUILD_SSP
),y
)
610 $(eval
$(call check-gcc-var
,-fno-stack-protector-all
))
611 $(eval
$(call check-gcc-var
,-fstack-protector
))
612 $(eval
$(call check-gcc-var
,-fstack-protector-all
))
613 SSP_CFLAGS
:= $(CFLAG_-fno-stack-protector-all
)
614 SSP_CFLAGS
+= $(CFLAG_-fstack-protector
)
615 SSP_ALL_CFLAGS ?
= $(CFLAG_-fstack-protector-all
)
617 SSP_CFLAGS
:= $(SSP_DISABLE_FLAGS
)
620 # Collect all CFLAGS components
621 CFLAGS
:= $(XWARNINGS
) $(CPU_CFLAGS
) $(SSP_CFLAGS
) \
622 -nostdinc
-I
$(top_builddir
)include \
623 -I
$(top_srcdir
)include -include libc-symbols.h \
624 -I
$(top_srcdir
)libc
/sysdeps
/linux
/$(TARGET_ARCH
) \
625 -I
$(top_srcdir
)libc
/sysdeps
/linux \
626 -I
$(top_srcdir
)ldso
/ldso
/$(TARGET_ARCH
) \
627 -I
$(top_srcdir
)ldso
/include -I.
629 # We need this to be checked within libc-symbols.h
630 ifneq ($(HAVE_SHARED
),y
)
634 $(eval
$(call check-ld-var
,--warn-once
))
635 $(eval
$(call check-ld-var
,--sort-common
))
636 $(eval
$(call check-ld-var
,--discard-all
))
637 LDFLAGS_NOSTRIP
:=$(LDFLAG-fuse-ld
) $(CPU_LDFLAGS-y
) -shared \
638 -Wl
,--warn-common
$(CFLAG_-Wl--warn-once
) -Wl
,-z
,combreloc
640 ifeq ($(UCLIBC_BUILD_RELRO
),y
)
641 LDFLAGS_NOSTRIP
+=-Wl
,-z
,relro
644 ifeq ($(UCLIBC_BUILD_NOW
),y
)
645 LDFLAGS_NOSTRIP
+=-Wl
,-z
,now
648 ifeq ($(LDSO_GNU_HASH_SUPPORT
),y
)
649 # Be sure that binutils support it
650 $(eval
$(call check-ld-var
,--hash-style
=gnu
))
651 ifeq ($(LDFLAG_--hash-style
=gnu
),)
652 ifneq ($(filter-out $(clean_targets
) CLEAN_
% install_headers headers-y
,$(MAKECMDGOALS
)),)
653 $(error Your binutils do not support
--hash-style option
, while you want to use it
)
656 LDFLAGS_NOSTRIP
+= $(CFLAG_-Wl--hash-style
=gnu
)
661 CFLAGS
+= -O0
-g3
-DDEBUG
663 CFLAGS
+= $(OPTIMIZATION
)
664 CFLAGS
+= $(OPTIMIZATION-
$(GCC_MAJOR_VER
))
665 CFLAGS
+= $(OPTIMIZATION-
$(GCC_MAJOR_VER
).
$(GCC_MINOR_VER
))
666 $(eval
$(call check-ld-var
,-O2
))
667 LDFLAGS_NOSTRIP
+= $(CFLAG_-Wl-O2
)
670 LDFLAGS
:=$(LDFLAGS_NOSTRIP
) -Wl
,-z
,defs
675 STRIPTOOL
:= true
-Stripping_disabled
679 # we try to compile all sources at once into an object (IMA), but
680 # gcc-3.3.x does not support it
681 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
682 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
683 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
684 ifeq ($(GCC_MAJOR_VER
),3)
687 $(eval
$(call check-gcc-var
,--combine
))
688 CFLAGS
+= $(CFLAG_--combine
)
694 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS
)),"")
695 CFLAGS
+= $(call qstrip
,$(UCLIBC_EXTRA_CFLAGS
))
697 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS
)),"")
698 LDFLAGS
+= $(call qstrip
,$(UCLIBC_EXTRA_LDFLAGS
))
701 ifeq ($(UCLIBC_HAS_STDIO_FUTEXES
),y
)
702 CFLAGS
+= -D__USE_STDIO_FUTEXES__
705 ifeq ($(UCLIBC_HAS_THREADS
),y
)
706 ifeq ($(UCLIBC_HAS_THREADS_NATIVE
),y
)
708 CFLAGS
+= -DHAVE_FORCED_UNWIND
-D_LIBC_REENTRANT
710 ifeq ($(UCLIBC_HAS_LINUXTHREADS
),y
)
711 PTNAME
:= linuxthreads
714 PTDIR
:= libpthread
/$(PTNAME
)
715 # set up system dependencies include dirs (NOTE: order matters!)
716 ifeq ($(UCLIBC_HAS_THREADS_NATIVE
),y
)
717 PTINC
:= -I
$(top_builddir
)$(PTDIR
) \
718 -I
$(top_srcdir
)$(PTDIR
) \
719 $(if
$(TARGET_SUBARCH
),-I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux
/$(TARGET_ARCH
)/$(TARGET_SUBARCH
)) \
720 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux
/$(TARGET_ARCH
) \
721 -I
$(top_builddir
)$(PTDIR
)/sysdeps
/$(TARGET_ARCH
) \
722 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/$(TARGET_ARCH
) \
723 -I
$(top_builddir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux \
724 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux \
725 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/pthread \
726 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/pthread
/bits \
727 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/generic
729 # Test for TLS if NPTL support was selected.
731 GCC_HAS_TLS
=$(shell \
732 echo
"extern __thread int foo;" |
$(CC
) -o
/dev
/null
-S
-xc
- 2>&1)
733 ifneq ($(GCC_HAS_TLS
),)
736 @echo
"#### Your compiler does not support TLS and you are trying to build uClibc";
737 @echo
"#### with NPTL support. Upgrade your binutils and gcc to versions which";
738 @echo
"#### support TLS for your architecture. Do not contact uClibc maintainers";
739 @echo
"#### about this problem.";
741 @echo
"#### Exiting...";
747 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux
/$(TARGET_ARCH
) \
748 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/$(TARGET_ARCH
) \
749 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux \
750 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/pthread \
751 -I
$(top_srcdir
)$(PTDIR
) \
752 -I
$(top_srcdir
)libpthread
759 CFLAGS
+= -I
$(top_srcdir
)libc
/sysdeps
/linux
/common
761 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
762 $(eval
$(call cache-output-var
,CC_IPREFIX
,$(CC
) -print-file-name
=include))
763 CC_INC
:= -isystem
$(dir $(CC_IPREFIX
))include-fixed
-isystem
$(CC_IPREFIX
)
766 CFLAGS
+= -I
$(KERNEL_HEADERS
)
768 ifneq ($(DOASSERTS
),y
)
772 ifeq ($(SYMBOL_PREFIX
),_
)
773 CFLAGS
+=-D__UCLIBC_UNDERSCORES__
776 # Keep the check_as from being needlessly executed
777 ifeq ($(UCLIBC_BUILD_NOEXECSTACK
),y
)
778 $(eval
$(call check-as-var
,--noexecstack
))
780 ASFLAGS
+= $(ASFLAG_--noexecstack
)
782 LIBGCC_CFLAGS ?
= $(CFLAGS
) $(CPU_CFLAGS-y
)
783 $(eval
$(call cache-output-var
,LIBGCC_A
,$(CC
) $(LIBGCC_CFLAGS
) -print-libgcc-file-name
))
784 $(eval
$(call cache-output-var
,LIBGCC_EH
,$(CC
) $(LIBGCC_CFLAGS
) -print-file-name
=libgcc_eh.a
))
785 # with -O0 we (e.g. lockf) might end up with references to
786 # _Unwind_Resume, so pull in gcc_eh in this case..
787 # with a --disable-shared toolchain, libgcc_eh.a and libgcc.a are combined
788 # in libgcc.a, so check if the printed file exist, before adding to the commandline
789 LIBGCC_EH_FILE
:= $(shell if
[ -f
$(LIBGCC_EH
) ]; then echo
$(LIBGCC_EH
); fi
)
790 LIBGCC_DIR
:= $(dir $(LIBGCC_A
))
791 LIBGCC
:= $(LIBGCC_A
) $(if
$(DODEBUG
),$(LIBGCC_EH_FILE
))
793 # moved from libpthread/linuxthreads
794 ifeq ($(UCLIBC_CTOR_DTOR
),y
)
795 SHARED_START_FILES
:=$(top_builddir
)lib
/crti.o
$(LIBGCC_DIR
)crtbeginS.o
796 SHARED_END_FILES
:=$(LIBGCC_DIR
)crtendS.o
$(top_builddir
)lib
/crtn.o
799 LOCAL_INSTALL_PATH
:= $(if
$(O
),$(O
)/)install_dir
801 PTHREAD_GENERATE_MANGLE ?
= -n
"s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p"