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.
30 clean_targets
:= clean realclean distclean \
31 objclean-y headers_clean-y CLEAN_utils
32 noconfig_targets
:= menuconfig config oldconfig silentoldconfig randconfig \
33 defconfig allyesconfig allnoconfig \
34 xconfig gconfig update-po-config mconf qconf gconf conf \
35 release
dist tags help
38 #-----------------------------------------------------------
39 # If you are running a cross compiler, you will want to set
40 # 'CROSS_COMPILE' to something more interesting ... Target
41 # architecture is determined by asking the CC compiler what
42 # arch it compiles things for, so unless your compiler is
43 # broken, you should not need to specify TARGET_ARCH.
45 # Most people will set this stuff on the command line, i.e.
46 # make CROSS_COMPILE=arm-linux-
47 # will build uClibc for 'arm'.
48 # CROSS is still supported for backward compatibily only
50 CROSS_COMPILE ?
= $(CROSS
)
52 CC
= $(CROSS_COMPILE
)gcc
53 AR
= $(CROSS_COMPILE
)ar
54 LD
= $(CROSS_COMPILE
)ld
55 NM
= $(CROSS_COMPILE
)nm
56 OBJDUMP
= $(CROSS_COMPILE
)objdump
57 STRIPTOOL
= $(CROSS_COMPILE
)strip
66 STRIP_FLAGS ?
= -x
-R .note
-R .comment
68 ## unused? if yes, remove after 0.9.31
69 ## UNIFDEF := $(top_builddir)extra/scripts/unifdef
71 # Select the compiler needed to build binaries for your development system
73 BUILD_CFLAGS
= -Os
-Wall
75 #---------------------------------------------------------
76 # Nothing beyond this point should ever be touched by mere
77 # mortals. Unless you hang out with the gods, you should
78 # probably leave all this stuff alone.
81 qstrip
= $(strip $(subst ",,$(1)))
84 KCONFIG_CONFIG ?
= $(top_builddir
).config
86 # Pull in the user's uClibc configuration
87 ifeq ($(filter $(noconfig_targets
) clean CLEAN_
%,$(MAKECMDGOALS
)),)
88 # Prevent make from searching
89 __ABS_KCONFIG_CONFIG ?
= $(abspath
$(KCONFIG_CONFIG
))
90 -include $(__ABS_KCONFIG_CONFIG
)
92 # else we have to tell config where to write .config
95 ifeq ($(HAVE_DOT_CONFIG
),y
)
96 # tell config where our .config lives
100 TARGET_ARCH
:=$(call qstrip
,$(TARGET_ARCH
))
101 ifeq ($(TARGET_ARCH
),)
102 ARCH ?
= $(shell uname
-m |
$(SED
) -e s
/i
.86/i386
/ \
103 -e s
/sun.
*/sparc
/ -e s
/sparc.
*/sparc
/ \
104 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
106 -e s
/s390x
/s390
/ -e s
/parisc.
*/hppa
/ \
107 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ \
108 -e s
/xtensa.
*/xtensa
/ )
110 ARCH
= $(TARGET_ARCH
)
114 # Make certain these contain a final "/", but no "//"s.
115 scrub_path
= $(strip $(subst //,/, $(subst ,/, $(call qstrip
,$(1)))))
116 TARGET_SUBARCH
:= $(call qstrip
,$(TARGET_SUBARCH
))
117 RUNTIME_PREFIX
:= $(call scrub_path
,$(RUNTIME_PREFIX
))
118 DEVEL_PREFIX
:= $(call scrub_path
,$(DEVEL_PREFIX
))
119 MULTILIB_DIR
:= $(call scrub_path
,$(MULTILIB_DIR
))
120 KERNEL_HEADERS
:= $(call scrub_path
,$(KERNEL_HEADERS
))
121 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
124 # Now config hard core
129 VERSION
:= $(MAJOR_VERSION
).
$(MINOR_VERSION
).
$(SUBLEVEL
)
130 ABI_VERSION
:= $(MAJOR_VERSION
)
131 ifneq ($(EXTRAVERSION
),)
132 VERSION
:= $(VERSION
)$(EXTRAVERSION
)
134 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
136 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL
139 SHARED_LIBNAME
:= $(LIBC
).so.
$(ABI_VERSION
)
140 UBACKTRACE_DSO
:= libubacktrace.so.
$(ABI_VERSION
)
141 ifneq ($(findstring $(TARGET_ARCH
) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64
),)
142 UCLIBC_LDSO_NAME
:= ld64-uClibc
143 ARCH_NATIVE_BIT
:= 64
145 UCLIBC_LDSO_NAME
:= ld-uClibc
146 ARCH_NATIVE_BIT
:= 32
148 UCLIBC_LDSO
:= $(UCLIBC_LDSO_NAME
).so.
$(ABI_VERSION
)
149 NONSHARED_LIBNAME
:= uclibc_nonshared.a
150 libc
:= $(top_builddir
)lib
/$(SHARED_LIBNAME
)
151 libc.depend
:= $(top_builddir
)lib
/$(SHARED_LIBNAME
:.
$(ABI_VERSION
)=)
152 ifneq ($(ARCH_HAS_NO_SHARED
),y
)
153 libdl.depend
:= $(top_builddir
)lib
/libdl.so
155 ifneq ($(HAS_NO_THREADS
),y
)
156 libpthread.depend
:= $(top_builddir
)lib
/libpthread.so
158 interp
:= $(top_builddir
)lib
/interp.os
159 ldso
:= $(top_builddir
)lib
/$(UCLIBC_LDSO
)
160 headers_dep
:= $(top_builddir
)include/bits
/sysnum.h
161 sub_headers
:= $(headers_dep
)
163 #LIBS :=$(interp) -L$(top_builddir)lib -lc
164 LIBS
:= $(interp
) -L
$(top_builddir
)lib
$(libc
:.
$(ABI_VERSION
)=)
166 # Make sure DESTDIR and PREFIX can be used to install
167 # PREFIX is a uClibcism while DESTDIR is a common GNUism
172 ifneq ($(HAVE_SHARED
),y
)
181 ifeq ($(CROSS_COMPILE
),)
182 CROSS_COMPILE
=$(call qstrip
,$(CROSS_COMPILER_PREFIX
))
185 # A nifty macro to make testing gcc features easier
187 if
$(CC
) $(1) -S
-o
/dev
/null
-xc
/dev
/null
> /dev
/null
2>&1; \
188 then echo
"$(1)"; else echo
"$(2)"; fi
)
190 if
$(CC
) -Wa
,$(1) -Wa
,-Z
-c
-o
/dev
/null
-xassembler
/dev
/null
> /dev
/null
2>&1; \
191 then echo
"-Wa,$(1)"; fi
)
193 if
$(LD
) $(1) -o
/dev
/null
-b binary
/dev
/null
> /dev
/null
2>&1; \
194 then echo
"$(1)"; fi
)
196 # Use variable indirection here so that we can have variable
197 # names with fun chars in them like equal signs
198 define check-tool-var
199 ifeq ($(filter $(clean_targets
) CLEAN_
%,$(MAKECMDGOALS
)),)
202 $$(_v
) := $$(call
$(1),$(subst %, ,$(3)))
208 # Usage: check-gcc-var,<flag>
209 # Check the C compiler to see if it supports <flag>.
210 # Export the variable CFLAG_<flag> if it does.
212 $(call check-tool-var
,check_gcc
,CFLAG
,$(1))
214 # Usage: check-as-var,<flag>
215 # Check the assembler to see if it supports <flag>. Export the
216 # variable ASFLAG_<flag> if it does (for invoking the assembler),
217 # as well CFLAG_-Wa<flag> (for invoking the compiler driver).
219 $(call check-tool-var
,check_as
,ASFLAG
,$(1))
221 export $$(_v
) = $$(if
$$(ASFLAG_
$(1)),-Wa
$$(comma
)$$(ASFLAG_
$(1)))
223 # Usage: check-ld-var,<flag>
224 # Check the linker to see if it supports <flag>. Export the
225 # variable LDFLAG_<flag> if it does (for invoking the linker),
226 # as well CFLAG_-Wl<flag> (for invoking the compiler driver).
228 $(call check-tool-var
,check_ld
,LDFLAG
,$(1))
230 export $$(_v
) = $$(if
$$(LDFLAG_
$(1)),-Wl
$$(comma
)$$(LDFLAG_
$(1)))
232 # Usage: cache-output-var,<variable>,<shell command>
233 # Execute <shell command> and cache the output in <variable>.
234 define cache-output-var
236 $(1) := $$(shell $(2))
245 # Flags in OPTIMIZATION are used only for non-debug builds
248 # Use '-Os' optimization if available, else use -O2, allow Config to override
249 $(eval
$(call check-gcc-var
,-Os
))
250 ifneq ($(CFLAG_-Os
),)
251 OPTIMIZATION
+= $(CFLAG_-Os
)
253 $(eval
$(call check-gcc-var
,-O2
))
254 OPTIMIZATION
+= $(CFLAG_-O2
)
256 # Use the gcc 3.4 -funit-at-a-time optimization when available
257 $(eval
$(call check-gcc-var
,-funit-at-a-time
))
258 OPTIMIZATION
+= $(CFLAG_-funit-at-a-time
)
259 # shrinks code by about 0.1%
260 $(eval
$(call check-gcc-var
,-fmerge-all-constants
))
261 $(eval
$(call check-gcc-var
,-fstrict-aliasing
))
262 OPTIMIZATION
+= $(CFLAG_-fmerge-all-constants
) $(CFLAG_-fstrict-aliasing
)
264 $(eval
$(call cache-output-var
,GCC_VER
,$(CC
) -dumpversion
))
265 GCC_VER
:= $(subst .
, ,$(GCC_VER
))
266 GCC_MAJOR_VER ?
= $(word 1,$(GCC_VER
))
267 #GCC_MINOR_VER ?= $(word 2,$(GCC_VER))
269 ifeq ($(GCC_MAJOR_VER
),4)
270 # shrinks code, results are from 4.0.2
272 $(eval
$(call check-gcc-var
,-fno-tree-loop-optimize
))
273 OPTIMIZATION
+= $(CFLAG_-fno-tree-loop-optimize
)
275 $(eval
$(call check-gcc-var
,-fno-tree-dominator-opts
))
276 OPTIMIZATION
+= $(CFLAG_-fno-tree-dominator-opts
)
278 $(eval
$(call check-gcc-var
,-fno-strength-reduce
))
279 OPTIMIZATION
+= $(CFLAG_-fno-strength-reduce
)
283 # CPU_CFLAGS-y contain options which are not warnings,
284 # not include or library paths, and not optimizations.
286 # Why -funsigned-char: I hunted a bug related to incorrect
287 # sign extension of 'char' type for 10 hours straight. Not fun.
288 CPU_CFLAGS-y
:= -funsigned-char
-fno-builtin
290 $(eval
$(call check-gcc-var
,-fno-asm
))
291 CPU_CFLAGS-y
+= $(CFLAG_-fno-asm
)
294 ifeq ($(UCLIBC_HAS_SOFT_FLOAT
),y
)
295 # If -msoft-float isn't supported, we want an error anyway.
296 # Hmm... might need to revisit this for arm since it has 2 different
297 # soft float encodings.
298 ifneq ($(TARGET_ARCH
),nios
)
299 ifneq ($(TARGET_ARCH
),nios2
)
300 ifneq ($(TARGET_ARCH
),sh
)
301 ifneq ($(TARGET_ARCH
),c6x
)
302 CPU_CFLAGS-y
+= -msoft-float
307 ifeq ($(TARGET_ARCH
),arm
)
308 # No longer needed with current toolchains, but leave it here for now.
309 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
310 # LDADD_LIBFLOAT=-lfloat
314 $(eval
$(call check-gcc-var
,-std
=gnu99
))
315 CPU_CFLAGS-y
+= $(CFLAG_-std
=gnu99
)
317 CPU_CFLAGS-
$(UCLIBC_FORMAT_SHARED_FLAT
) += -mid-shared-library
318 CPU_CFLAGS-
$(UCLIBC_FORMAT_FLAT_SEP_DATA
) += -msep-data
320 CPU_LDFLAGS-
$(ARCH_LITTLE_ENDIAN
) += -Wl
,-EL
321 CPU_LDFLAGS-
$(ARCH_BIG_ENDIAN
) += -Wl
,-EB
324 PICFLAG-
$(UCLIBC_FORMAT_FDPIC_ELF
) := -mfdpic
325 PICFLAG-
$(UCLIBC_FORMAT_DSBT_ELF
) := -mdsbt
-fpic
326 PICFLAG
:= $(PICFLAG-y
)
329 # Some nice CPU specific optimizations
330 ifeq ($(TARGET_ARCH
),i386
)
331 $(eval
$(call check-gcc-var
,-fomit-frame-pointer
))
332 OPTIMIZATION
+= $(CFLAG_-fomit-frame-pointer
)
334 ifeq ($(CONFIG_386
)$(CONFIG_486
)$(CONFIG_586
),y
)
335 # TODO: Change this to a gcc version check. This bug
336 # should be fixed with at least gcc-4.3.
337 # Non-SSE capable processor.
338 # NB: this may make SSE insns segfault!
339 # -O1 -march=pentium3, -Os -msse etc are known to be affected.
340 # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
341 # -m32 is needed if host is 64-bit
342 OPTIMIZATION
+=$(call check_gcc
,-m32
-mpreferred-stack-boundary
=2,)
344 $(eval
$(call check-gcc-var
,-mpreferred-stack-boundary
=4))
345 OPTIMIZATION
+= $(CFLAG_-mpreferred-stack-boundary
=4)
348 # Choice of alignment (please document why!)
349 # -falign-labels: in-line labels
350 # (reachable by normal code flow, aligning will insert nops
351 # which will be executed - may even make things slower)
352 # -falign-jumps: reachable only by a jump
353 # Generic: no alignment at all (smallest code)
354 GCC_FALIGN
=$(call check_gcc
,-falign-functions
=1 -falign-jumps
=1 -falign-labels
=1 -falign-loops
=1,-malign-jumps
=1 -malign-loops
=1)
355 OPTIMIZATION
+=$(GCC_FALIGN
)
357 # Putting each function and data object into its own section
358 # allows for kbytes of less text if users link against static uclibc
359 # using ld --gc-sections.
360 # ld 2.18 can't do that (yet?) for shared libraries, so we itself
361 # do not use --gc-sections at shared lib link time.
362 # However, in combination with sections being sorted by alignment
363 # it does result in much reduced padding:
364 # text data bss dec hex
365 # 235319 1472 5992 242783 3b45f old.so
366 # 234104 1472 5980 241556 3af94 new.so
367 # Without -ffunction-sections, all functions will get aligned
368 # to 4 byte boundary by as/ld. This is arguably a bug in as.
369 # It specifies 4 byte align for .text even if not told to do so:
370 # Idx Name Size VMA LMA File off Algn
371 # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
372 CPU_CFLAGS-y
+= $(CFLAG_-ffunction-sections
) $(CFLAG_-fdata-sections
)
373 CPU_LDFLAGS-y
+= $(CFLAG_-Wl--sort-common
)
374 $(eval
$(call check-ld-var
,--sort-section
=alignment
))
375 CPU_LDFLAGS-y
+= $(CFLAG_-Wl--sort-section
=alignment
)
381 ifeq ($(TARGET_ARCH
),sparc
)
382 CPU_CFLAGS-
$(CONFIG_SPARC_V7
)+=-mcpu
=v7
383 CPU_CFLAGS-
$(CONFIG_SPARC_V8
)+=-mcpu
=v8
384 CPU_CFLAGS-
$(CONFIG_SPARC_V9
)+=-mcpu
=v9
385 CPU_CFLAGS-
$(CONFIG_SPARC_V9B
)+=$(call check_gcc
,-mcpu
=v9b
,-mcpu
=ultrasparc
)
388 ifeq ($(TARGET_ARCH
),arm
)
389 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
)+=-mlittle-endian
390 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
)+=-mbig-endian
391 CPU_CFLAGS-
$(COMPILE_IN_THUMB_MODE
)+=-mthumb
394 ifeq ($(TARGET_ARCH
),metag
)
396 CPU_CFLAGS-
$(CONFIG_META_1_2
)+=
397 CPU_CFLAGS-
$(CONFIG_META_2_1
)+=-Wa
,-mcpu
=metac21
400 ifeq ($(TARGET_ARCH
),mips
)
401 OPTIMIZATION
+=-mno-split-addresses
402 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_1
)+=-mips1
403 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_2
)+=-mips2
-mtune
=mips2
404 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_3
)+=-mips3
-mtune
=mips3
405 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_4
)+=-mips4
-mtune
=mips4
406 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_MIPS32
)+=-mips32
-mtune
=mips32
407 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_MIPS32R2
)+=-march
=mips32r2
-mtune
=mips32r2
408 CPU_CFLAGS-
$(CONFIG_MIPS_ISA_MIPS64
)+=-mips64
-mtune
=mips32
409 ifeq ($(strip $(ARCH_BIG_ENDIAN
)),y
)
410 CPU_LDFLAGS-
$(CONFIG_MIPS_N64_ABI
)+=-Wl
,-melf64btsmip
411 CPU_LDFLAGS-
$(CONFIG_MIPS_O32_ABI
)+=-Wl
,-melf32btsmip
413 ifeq ($(strip $(ARCH_LITTLE_ENDIAN
)),y
)
414 CPU_LDFLAGS-
$(CONFIG_MIPS_N64_ABI
)+=-Wl
,-melf64ltsmip
415 CPU_LDFLAGS-
$(CONFIG_MIPS_O32_ABI
)+=-Wl
,-melf32ltsmip
417 CPU_CFLAGS-
$(CONFIG_MIPS_N64_ABI
)+=-mabi
=64
418 CPU_CFLAGS-
$(CONFIG_MIPS_O32_ABI
)+=-mabi
=32
419 CPU_CFLAGS-
$(CONFIG_MIPS_N32_ABI
)+=-mabi
=n32
422 ifeq ($(TARGET_ARCH
),nios
)
423 OPTIMIZATION
+=-funaligned-struct-hack
424 CPU_LDFLAGS-y
+=-Wl
,-m32
425 CPU_CFLAGS-y
+=-Wl
,-m32
428 ifeq ($(TARGET_ARCH
),sh
)
429 $(eval
$(call check-gcc-var
,-mprefergot
))
430 OPTIMIZATION
+= $(CFLAG_-mprefergot
)
431 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
)+=-ml
432 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
)+=-mb
433 CPU_CFLAGS-
$(CONFIG_SH2
)+=-m2
434 CPU_CFLAGS-
$(CONFIG_SH3
)+=-m3
435 ifeq ($(UCLIBC_HAS_FPU
),y
)
436 CPU_CFLAGS-
$(CONFIG_SH2A
)+=-m2a
437 CPU_CFLAGS-
$(CONFIG_SH4
)+=-m4
439 CPU_CFLAGS-
$(CONFIG_SH2A
)+=-m2a-nofpu
440 CPU_CFLAGS-
$(CONFIG_SH4
)+=-m4-nofpu
444 ifeq ($(TARGET_ARCH
),sh64
)
445 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
):=-ml
446 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
):=-mb
447 CPU_CFLAGS-
$(CONFIG_SH5
)+=-m5-32media
450 ifeq ($(TARGET_ARCH
),h8300
)
452 CPU_LDFLAGS-
$(CONFIG_H8300H
)+= -Wl
,-ms8300h
453 CPU_LDFLAGS-
$(CONFIG_H8S
) += -Wl
,-ms8300s
454 CPU_CFLAGS-
$(CONFIG_H8300H
) += -mh
-mint32
455 CPU_CFLAGS-
$(CONFIG_H8S
) += -ms
-mint32
458 ifeq ($(TARGET_ARCH
),i960
)
459 OPTIMIZATION
+=-mh
-mint32
#-fsigned-char
462 ifeq ($(TARGET_ARCH
),e1
)
463 OPTIMIZATION
+=-mgnu-param
466 ifeq ($(TARGET_ARCH
),cris
)
467 CPU_LDFLAGS-
$(CONFIG_CRIS
)+=-Wl
,-mcrislinux
468 CPU_LDFLAGS-
$(CONFIG_CRISV32
)+=-Wl
,-mcrislinux
469 CPU_CFLAGS-
$(CONFIG_CRIS
)+=-mlinux
474 ifeq ($(TARGET_ARCH
),m68k
)
475 # -fPIC is only supported for 68020 and above. It is not supported
476 # for 68000, 68010, or Coldfire.
481 ifeq ($(TARGET_ARCH
),powerpc
)
482 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
483 # enough. Therefore use -fpic which will reduce code size and generates
487 PPC_HAS_REL16
:=$(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
)
488 CPU_CFLAGS-
$(PPC_HAS_REL16
)+= -DHAVE_ASM_PPC_REL16
489 CPU_CFLAGS-
$(CONFIG_E500
) += "-D__NO_MATH_INLINES"
493 ifeq ($(TARGET_ARCH
),bfin
)
495 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF
),y
)
496 CPU_CFLAGS-y
:=-mfdpic
497 CPU_LDFLAGS-y
+= -Wl
,-melf32bfinfd
501 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT
),y
)
502 PICFLAG
:= -mleaf-id-shared-library
506 ifeq ($(TARGET_ARCH
),frv
)
507 CPU_LDFLAGS-
$(CONFIG_FRV
)+=-Wl
,-melf32frvfd
508 # Using -pie causes the program to have an interpreter, which is
509 # forbidden, so we must make do with -shared. Unfortunately,
510 # -shared by itself would get us global function descriptors
511 # and calls through PLTs, dynamic resolution of symbols, etc,
512 # which would break as well, but -Bsymbolic comes to the rescue.
513 export LDPIEFLAG
:=-shared
-Wl
,-Bsymbolic
517 ifeq ($(strip $(TARGET_ARCH
)),avr32
)
518 CPU_CFLAGS-
$(CONFIG_AVR32_AP7
) += -march
=ap
519 CPU_CFLAGS-
$(CONFIG_LINKRELAX
) += -mrelax
520 CPU_LDFLAGS-
$(CONFIG_LINKRELAX
) += --relax
523 ifeq ($(TARGET_ARCH
),i960
)
527 ifeq ($(TARGET_ARCH
),v850
)
531 ifeq ($(TARGET_ARCH
),c6x
)
533 CPU_CFLAGS-
$(CONFIG_TMS320C64X
) += -march
=c64x
534 CPU_CFLAGS-
$(CONFIG_TMS320C64XPLUS
) += -march
=c64x
+
535 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
)+=-mlittle-endian
536 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
)+=-mbig-endian
537 CPU_LDFLAGS-y
+= $(CPU_CFLAGS
)
540 $(eval
$(call check-gcc-var
,$(PIEFLAG_NAME
)))
541 PIEFLAG
:= $(CFLAG_
$(PIEFLAG_NAME
))
543 PIEFLAG
:= $(PICFLAG
)
545 # We need to keep track of both the CC PIE flag (above) as
546 # well as the LD PIE flag (below) because we can't rely on
547 # gcc passing -pie if we used -fPIE. We need to directly use -pie
548 # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
549 $(eval
$(call cache-output-var
,LDPIEFLAG
,$(LD
) --help
2>/dev
/null | grep
-q
-- -pie
&& echo
"-pie"))
551 # Check for --as-needed support in linker
552 ifndef LD_FLAG_ASNEEDED
553 _LD_FLAG_ASNEEDED
:=$(shell $(LD
) --help
2>/dev
/null | grep
-- --as-needed
)
554 ifneq ($(_LD_FLAG_ASNEEDED
),)
555 export LD_FLAG_ASNEEDED
:=--as-needed
558 ifndef LD_FLAG_NO_ASNEEDED
559 ifdef LD_FLAG_ASNEEDED
560 export LD_FLAG_NO_ASNEEDED
:=--no-as-needed
563 ifndef CC_FLAG_ASNEEDED
564 ifdef LD_FLAG_ASNEEDED
565 export CC_FLAG_ASNEEDED
:=-Wl
,$(LD_FLAG_ASNEEDED
)
568 ifndef CC_FLAG_NO_ASNEEDED
569 ifdef LD_FLAG_NO_ASNEEDED
570 export CC_FLAG_NO_ASNEEDED
:=-Wl
,$(LD_FLAG_NO_ASNEEDED
)
573 link.asneeded
= $(if
$(findstring yy
,$(CC_FLAG_ASNEEDED
)$(CC_FLAG_NO_ASNEEDED
)),$(CC_FLAG_ASNEEDED
) $(1) $(CC_FLAG_NO_ASNEEDED
))
575 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
577 export ASNEEDED
:=$(shell $(LD
) --help
2>/dev
/null | grep
-q
-- --as-needed
&& echo
"AS_NEEDED ( $(UCLIBC_LDSO) )" || echo
"$(UCLIBC_LDSO)")
579 # Only used in installed libc.so linker script
580 ifeq ($(UCLIBC_HAS_BACKTRACE
),y
)
581 ifeq ($(HARDWIRED_ABSPATH
),y
)
582 UBACKTRACE_FULL_NAME
:= $(subst //,/,$(RUNTIME_PREFIX
)$(MULTILIB_DIR
)/$(UBACKTRACE_DSO
))
584 UBACKTRACE_FULL_NAME
:= $(UBACKTRACE_DSO
)
586 export UBACKTRACE_ASNEEDED
:=$(shell $(LD
) --help
2>/dev
/null | grep
-q
-- --as-needed
&& \
587 echo
"GROUP ( AS_NEEDED ( $(UBACKTRACE_FULL_NAME) ) )" || \
588 echo
"GROUP ( $(UBACKTRACE_FULL_NAME) )")
590 export UBACKTRACE_ASNEEDED
:=""
594 # Add a bunch of extra pedantic annoyingly strict checks
595 WARNING_FLAGS
= -Wstrict-prototypes
-Wstrict-aliasing
596 ifeq ($(EXTRA_WARNINGS
),y
)
600 -Wmissing-format-attribute \
601 -Wmissing-prototypes \
602 -Wmissing-declarations \
605 -Wold-style-declaration \
606 -Wold-style-definition \
609 # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
610 WARNING_FLAGS-gcc-4
+= -Wdeclaration-after-statement
612 WARNING_FLAGS
+= $(WARNING_FLAGS-gcc-
$(GCC_MAJOR_VER
))
613 $(foreach w
,$(WARNING_FLAGS
),$(eval
$(call check-gcc-var
,$(w
))))
614 XWARNINGS
= $(call qstrip
,$(WARNINGS
)) $(foreach w
,$(WARNING_FLAGS
),$(CFLAG_
$(w
)))
616 CPU_CFLAGS
=$(call qstrip
,$(CPU_CFLAGS-y
))
618 # Save the tested flag in a single variable and force it to be
619 # evaluated just once. Then use that computed value.
620 $(eval
$(call check-gcc-var
,-fno-stack-protector
))
621 SSP_DISABLE_FLAGS ?
= $(CFLAG_-fno-stack-protector
)
622 ifeq ($(UCLIBC_BUILD_SSP
),y
)
623 $(eval
$(call check-gcc-var
,-fno-stack-protector-all
))
624 $(eval
$(call check-gcc-var
,-fstack-protector
))
625 $(eval
$(call check-gcc-var
,-fstack-protector-all
))
626 SSP_CFLAGS
:= $(CFLAG_-fno-stack-protector-all
)
627 SSP_CFLAGS
+= $(CFLAG_-fstack-protector
)
628 SSP_ALL_CFLAGS ?
= $(CFLAG_-fstack-protector-all
)
630 SSP_CFLAGS
:= $(SSP_DISABLE_FLAGS
)
633 $(eval
$(call check-gcc-var
,-nostdlib
))
635 # Collect all CFLAGS components
636 CFLAGS
:= $(XWARNINGS
) $(CPU_CFLAGS
) $(SSP_CFLAGS
) \
637 -nostdinc
-I
$(top_builddir
)include \
638 -I
$(top_srcdir
)include -include libc-symbols.h \
639 -I
$(top_srcdir
)libc
/sysdeps
/linux
/$(TARGET_ARCH
) \
640 -I
$(top_srcdir
)libc
/sysdeps
/linux \
641 -I
$(top_srcdir
)ldso
/ldso
/$(TARGET_ARCH
) \
642 -I
$(top_srcdir
)ldso
/include -I.
643 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS
)),"")
644 CFLAGS
+= $(call qstrip
,$(UCLIBC_EXTRA_CFLAGS
))
647 # We need this to be checked within libc-symbols.h
648 ifneq ($(HAVE_SHARED
),y
)
652 $(eval
$(call check-ld-var
,--warn-once
))
653 $(eval
$(call check-ld-var
,--sort-common
))
654 $(eval
$(call check-ld-var
,--discard-all
))
655 LDFLAGS_NOSTRIP
:=$(CPU_LDFLAGS-y
) -shared \
656 -Wl
,--warn-common
$(CFLAG_-Wl--warn-once
) -Wl
,-z
,combreloc
657 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
658 #$(eval $(call check-ld-var,--gc-sections))
659 #LDFLAGS_NOSTRIP += $(LDFLAG_--gc-sections)
661 $(eval
$(call check-gcc-var
,-fdata-sections
))
662 $(eval
$(call check-gcc-var
,-ffunction-sections
))
664 ifeq ($(UCLIBC_BUILD_RELRO
),y
)
665 LDFLAGS_NOSTRIP
+=-Wl
,-z
,relro
668 ifeq ($(UCLIBC_BUILD_NOW
),y
)
669 LDFLAGS_NOSTRIP
+=-Wl
,-z
,now
672 ifeq ($(LDSO_GNU_HASH_SUPPORT
),y
)
673 # Be sure that binutils support it
674 $(eval
$(call check-ld-var
,--hash-style
=gnu
))
675 ifeq ($(LDFLAG_--hash-style
=gnu
),)
676 ifneq ($(filter-out $(clean_targets
) CLEAN_
% install_headers headers-y
,$(MAKECMDGOALS
)),)
677 $(error Your binutils do not support
--hash-style option
, while you want to use it
)
680 LDFLAGS_NOSTRIP
+= $(CFLAG_-Wl--hash-style
=gnu
)
684 LDFLAGS
:=$(LDFLAGS_NOSTRIP
) -Wl
,-z
,defs
686 CFLAGS
+= -O0
-g3
-DDEBUG
688 CFLAGS
+= $(OPTIMIZATION
)
693 STRIPTOOL
:= true
-Stripping_disabled
695 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS
)),"")
696 CFLAGS
+= $(call qstrip
,$(UCLIBC_EXTRA_CFLAGS
))
700 # we try to compile all sources at once into an object (IMA), but
701 # gcc-3.3.x does not support it
702 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
703 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
704 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
705 ifeq ($(GCC_MAJOR_VER
),3)
708 $(eval
$(call check-gcc-var
,--combine
))
709 CFLAGS
+= $(CFLAG_--combine
)
715 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS
)),"")
716 LDFLAGS
+= $(call qstrip
,$(UCLIBC_EXTRA_LDFLAGS
))
719 ifeq ($(UCLIBC_HAS_THREADS
),y
)
720 ifeq ($(UCLIBC_HAS_THREADS_NATIVE
),y
)
722 CFLAGS
+= -DHAVE_FORCED_UNWIND
724 ifeq ($(LINUXTHREADS_OLD
),y
)
725 PTNAME
:= linuxthreads.old
727 PTNAME
:= linuxthreads
730 PTDIR
:= libpthread
/$(PTNAME
)
731 # set up system dependencies include dirs (NOTE: order matters!)
732 ifeq ($(UCLIBC_HAS_THREADS_NATIVE
),y
)
733 PTINC
:= -I
$(top_builddir
)$(PTDIR
) \
734 -I
$(top_srcdir
)$(PTDIR
) \
735 $(if
$(TARGET_SUBARCH
),-I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux
/$(TARGET_ARCH
)/$(TARGET_SUBARCH
)) \
736 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux
/$(TARGET_ARCH
) \
737 -I
$(top_builddir
)$(PTDIR
)/sysdeps
/$(TARGET_ARCH
) \
738 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/$(TARGET_ARCH
) \
739 -I
$(top_builddir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux \
740 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux \
741 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/pthread \
742 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/pthread
/bits \
743 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/generic
745 # Test for TLS if NPTL support was selected.
747 GCC_HAS_TLS
=$(shell \
748 echo
"extern __thread int foo;" |
$(CC
) -o
/dev
/null
-S
-xc
- 2>&1)
749 ifneq ($(GCC_HAS_TLS
),)
752 @echo
"#### Your compiler does not support TLS and you are trying to build uClibc";
753 @echo
"#### with NPTL support. Upgrade your binutils and gcc to versions which";
754 @echo
"#### support TLS for your architecture. Do not contact uClibc maintainers";
755 @echo
"#### about this problem.";
757 @echo
"#### Exiting...";
763 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux
/$(TARGET_ARCH
) \
764 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/$(TARGET_ARCH
) \
765 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux \
766 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/pthread \
767 -I
$(top_srcdir
)$(PTDIR
) \
768 -I
$(top_srcdir
)libpthread
775 CFLAGS
+= -I
$(top_srcdir
)libc
/sysdeps
/linux
/common
777 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
778 $(eval
$(call cache-output-var
,CC_IPREFIX
,$(CC
) -print-file-name
=include))
779 CC_INC
:= -isystem
$(dir $(CC_IPREFIX
))include-fixed
-isystem
$(CC_IPREFIX
)
782 CFLAGS
+= -I
$(KERNEL_HEADERS
)
784 ifneq ($(DOASSERTS
),y
)
788 ifeq ($(SYMBOL_PREFIX
),_
)
789 CFLAGS
+=-D__UCLIBC_UNDERSCORES__
792 # Keep the check_as from being needlessly executed
793 ifeq ($(UCLIBC_BUILD_NOEXECSTACK
),y
)
794 $(eval
$(call check-as-var
,--noexecstack
))
796 ASFLAGS
= $(ASFLAG_--noexecstack
)
798 LIBGCC_CFLAGS ?
= $(CFLAGS
) $(CPU_CFLAGS-y
)
799 $(eval
$(call cache-output-var
,LIBGCC
,$(CC
) $(LIBGCC_CFLAGS
) -print-libgcc-file-name
))
800 $(eval
$(call cache-output-var
,LIBGCC_EH
,$(CC
) $(LIBGCC_CFLAGS
) -print-file-name
=libgcc_eh.a
))
801 # with -O0 we (e.g. lockf) might end up with references to
802 # _Unwind_Resume, so pull in gcc_eh in this case..
803 LIBGCC_DIR
:=$(dir $(LIBGCC
))
804 LIBGCC
+= $(if
$(DODEBUG
),$(LIBGCC_EH
))
806 # moved from libpthread/linuxthreads
807 ifeq ($(UCLIBC_CTOR_DTOR
),y
)
808 SHARED_START_FILES
:=$(top_builddir
)lib
/crti.o
$(LIBGCC_DIR
)crtbeginS.o
809 SHARED_END_FILES
:=$(LIBGCC_DIR
)crtendS.o
$(top_builddir
)lib
/crtn.o
812 LOCAL_INSTALL_PATH
:= $(if
$(O
),$(O
)/)install_dir
814 PTHREAD_GENERATE_MANGLE ?
= -n
"s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p"