1 # Rules.mak for uClibc-ng
3 # Copyright (C) 2000-2008 Erik Andersen <andersen@uclibc.org>
4 # Copyright (C) 2015-2023 Waldemar Brodkorb <wbx@uclibc-ng.org>
6 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
10 # FOO = bar -- recursively expanded variable. Value is remebered verbatim.
11 # If it contains references to other variables, these references
12 # are expanded whenever this variable is _substituted_.
13 # FOO := bar -- simply expanded variable. Right hand is expanded when
14 # the variable is _defined_. Therefore faster than =.
15 # FOO ?= bar -- set a value only if it is not already set
16 # (behaves as =, not :=).
17 # FOO += bar -- append; if FOO is not defined, acts like = (not :=).
20 # check for proper make version
21 ifneq ($(findstring x3.7
,x
$(MAKE_VERSION
)),)
22 $(error Your make is too old
$(MAKE_VERSION
). Go
get at least
3.80)
25 #-----------------------------------------------------------
26 # This file contains rules which are shared between multiple
27 # Makefiles. All normal configuration options live in the
28 # file named ".config". Don't mess with this file unless
29 # you know what you are doing.
31 clean_targets
:= clean realclean distclean \
32 objclean-y headers_clean-y CLEAN_utils
33 noconfig_targets
:= menuconfig config nconfig \
34 oldaskconfig silentoldconfig oldconfig allnoconfig allyesconfig \
35 alldefconfig randconfig defconfig savedefconfig listnewconfig \
37 xconfig gconfig update-po-config mconf qconf gconf nconf conf \
38 release
dist tags help
41 #-----------------------------------------------------------
42 # If you are running a cross compiler, you will want to set
43 # 'CROSS_COMPILE' to something more interesting ... Target
44 # architecture is determined by asking the CC compiler what
45 # arch it compiles things for, so unless your compiler is
46 # broken, you should not need to specify TARGET_ARCH.
48 # Most people will set this stuff on the command line, i.e.
49 # make CROSS_COMPILE=arm-linux-
50 # will build uClibc-ng for 'arm'.
51 # CROSS is still supported for backward compatibily only
53 CROSS_COMPILE ?
= $(CROSS
)
55 CC
= $(CROSS_COMPILE
)gcc
56 AR
= $(CROSS_COMPILE
)ar
57 LD
= $(CROSS_COMPILE
)ld
58 NM
= $(CROSS_COMPILE
)nm
59 OBJDUMP
= $(CROSS_COMPILE
)objdump
60 STRIPTOOL
= $(CROSS_COMPILE
)strip
69 STRIP_FLAGS ?
= -x
-R .note
-R .comment
71 # Select the compiler needed to build binaries for your development system
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)))
85 KCONFIG_CONFIG ?
= $(top_builddir
).config
86 KCONFIG_CONFIG
:= $(abspath
$(KCONFIG_CONFIG
))
88 KCONFIG_AUTOCONFIG
:= $(dir $(KCONFIG_CONFIG
))include/config
/auto.conf
89 export KCONFIG_AUTOCONFIG
90 KCONFIG_TRISTATE
:= $(dir $(KCONFIG_CONFIG
))include/config
/tristate.conf
91 export KCONFIG_TRISTATE
92 srctree
:= $(abspath
$(top_srcdir
))
94 KCONFIG_AUTOHEADER
:= $(dir $(KCONFIG_CONFIG
))include/generated
/autoconf.h
95 export KCONFIG_AUTOHEADER
96 Kconfig
:= $(abspath
$(top_srcdir
)extra
/Configs
/Config.in
)
98 # Pull in the user's uClibc-ng configuration
99 ifeq ($(filter $(noconfig_targets
) clean CLEAN_
%,$(MAKECMDGOALS
)),)
100 -include $(KCONFIG_CONFIG
)
103 TARGET_ARCH
:=$(call qstrip
,$(TARGET_ARCH
))
104 ifeq ($(TARGET_ARCH
),)
105 ARCH ?
= $(shell uname
-m |
$(SED
) -e s
/i
.86/i386
/ \
106 -e s
/sun.
*/sparc
/ -e s
/sparc.
*/sparc
/ \
107 -e s
/arm.
*/arm
/ -e s
/sa110
/arm
/ \
108 -e s
/nds32.
*/nds32
/ \
110 -e s
/s390x
/s390
/ -e s
/parisc.
*/hppa
/ \
111 -e s
/ppc.
*/powerpc
/ -e s
/mips.
*/mips
/ \
112 -e s
/xtensa.
*/xtensa
/ )
114 ARCH
= $(TARGET_ARCH
)
118 # Make certain these contain a final "/", but no "//"s.
119 scrub_path
= $(strip $(subst //,/, $(subst ,/, $(call qstrip
,$(1)))))
120 TARGET_SUBARCH
:= $(call qstrip
,$(TARGET_SUBARCH
))
121 RUNTIME_PREFIX
:= $(call scrub_path
,$(RUNTIME_PREFIX
))
122 DEVEL_PREFIX
:= $(call scrub_path
,$(DEVEL_PREFIX
))
123 MULTILIB_DIR
:= $(call scrub_path
,$(MULTILIB_DIR
))
124 KERNEL_HEADERS
:= $(call scrub_path
,$(KERNEL_HEADERS
))
125 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
128 # Now config hard core
133 VERSION
:= $(MAJOR_VERSION
).
$(MINOR_VERSION
).
$(SUBLEVEL
)
134 ABI_VERSION
:= $(MAJOR_VERSION
)
135 ifneq ($(EXTRAVERSION
),)
136 VERSION
:= $(VERSION
)$(EXTRAVERSION
)
138 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
140 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL
143 SHARED_LIBNAME
:= $(LIBC
).so.
$(ABI_VERSION
)
145 UCLIBC_LDSO_NAME
:= $(call qstrip
,$(TARGET_LDSO_NAME
))
146 ARCH_NATIVE_BIT
:= $(call qstrip
,$(TARGET_ARCH_BITS
))
148 UCLIBC_LDSO
:= $(UCLIBC_LDSO_NAME
).so.
$(ABI_VERSION
)
149 NONSHARED_LIBNAME
:= uclibc_nonshared.a
150 NONSHARED_LIBPTHREAD
:= libpthread_nonshared.a
152 libc
:= $(top_builddir
)lib
/$(SHARED_LIBNAME
)
153 libc.depend
:= $(top_builddir
)lib
/$(SHARED_LIBNAME
:.
$(ABI_VERSION
)=)
154 interp
:= $(top_builddir
)lib
/interp.os
155 ldso
:= $(top_builddir
)lib
/$(UCLIBC_LDSO
)
156 headers_dep
:= $(top_builddir
)include/bits
/sysnum.h \
157 $(top_builddir
)include/bits
/uClibc_config.h
158 sub_headers
:= $(headers_dep
)
160 LIBS
:= $(interp
) -L
$(top_builddir
)lib
$(libc
:.
$(ABI_VERSION
)=)
162 # Make sure DESTDIR and PREFIX can be used to install
163 # PREFIX is a uClibcism while DESTDIR is a common GNUism
168 ifneq ($(HAVE_SHARED
),y
)
171 ifneq ($(HAVE_LDSO
),y
)
179 ifeq ($(CROSS_COMPILE
),)
180 CROSS_COMPILE
=$(call qstrip
,$(CROSS_COMPILER_PREFIX
))
183 # A nifty macro to make testing gcc features easier
185 tf
="/tmp/cgccucl$$$$.o"; \
186 if
$(CC
) $(1) -S
-o
$$tf -xc
/dev
/null
> /dev
/null
2>&1; \
187 then echo
"$(1)"; else echo
"$(2)"; fi
; rm -f
$$tf )
189 tf
="/tmp/casucl$$$$.o"; \
190 if
$(CC
) -Wa
,$(1) -Wa
,-Z
-c
-o
$$tf -xassembler
/dev
/null
> /dev
/null
2>&1; \
191 then echo
"-Wa,$(1)"; fi
; rm -f
$$tf )
193 tf
="/tmp/clducl$$$$.c"; echo
"int _start(){return 0;}int main(){return 0;}" >$$tf; \
194 if
$(CC
) $(LDFLAG-fuse-ld
) $(CFLAG_-Wl--no-warn-mismatch
) -Wl
,$(1) $(CFLAG_-nostdlib
) -o
/dev
/null
$$tf > /dev
/null
2>&1; \
195 then echo
"$(1)"; fi
; rm -f
$$tf )
197 # Use variable indirection here so that we can have variable
198 # names with fun chars in them like equal signs
199 define check-tool-var
200 ifeq ($(filter $(clean_targets
) CLEAN_
%,$(MAKECMDGOALS
)),)
203 $$(_v
) := $$(call
$(1),$(subst %, ,$(3)))
209 # Usage: check-gcc-var,<flag>
210 # Check the C compiler to see if it supports <flag>.
211 # Export the variable CFLAG_<flag> if it does.
213 $(call check-tool-var
,check_gcc
,CFLAG
,$(1))
215 # Usage: check-as-var,<flag>
216 # Check the assembler to see if it supports <flag>. Export the
217 # variable ASFLAG_<flag> if it does (for invoking the assembler),
218 # as well CFLAG_-Wa<flag> (for invoking the compiler driver).
220 $(call check-tool-var
,check_as
,ASFLAG
,$(1))
222 export $$(_v
) = $$(if
$$(ASFLAG_
$(1)),-Wa
$$(comma
)$$(ASFLAG_
$(1)))
224 # Usage: check-ld-var,<flag>
225 # Check the linker to see if it supports <flag>. Export the
226 # variable LDFLAG_<flag> if it does (for invoking the linker),
227 # as well CFLAG_-Wl<flag> (for invoking the compiler driver).
229 $(call check-tool-var
,check_ld
,LDFLAG
,$(1))
231 export $$(_v
) = $$(if
$$(LDFLAG_
$(1)),-Wl
$$(comma
)$$(LDFLAG_
$(1)))
233 # Usage: cache-output-var,<variable>,<shell command>
234 # Execute <shell command> and cache the output in <variable>.
235 define cache-output-var
237 $(1) := $$(shell $(2))
245 # Note: The check for -nostdlib has to be before all calls to check_ld
246 $(eval
$(call check-gcc-var
,-nostdlib
))
247 $(eval
$(call check-gcc-var
,-nostartfiles
))
248 # deliberately not named CFLAG-fuse-ld since unchecked and from user
249 LDFLAG-fuse-ld
:= $(filter -fuse-ld
=%,$(call qstrip
,$(UCLIBC_EXTRA_CFLAGS
)))
250 # failed to merge target specific data of file /dev/null
251 # Could use -Wl,--script,$(top_srcdir)extra/scripts/none.lds as well.
252 $(eval
$(call check-ld-var
,--no-warn-mismatch
))
254 $(eval
$(call cache-output-var
,GCC_VER
,$(CC
) -dumpversion
))
255 GCC_VER
:= $(subst .
, ,$(GCC_VER
))
256 GCC_MAJOR_VER ?
= $(word 1,$(GCC_VER
))
257 GCC_MINOR_VER ?
= $(word 2,$(GCC_VER
))
259 # Flags in OPTIMIZATION are used only for non-debug builds
262 OPTIMIZATION-
$(GCC_MAJOR_VER
):=
263 OPTIMIZATION-
$(GCC_MAJOR_VER
).
$(GCC_MINOR_VER
):=
265 # Use '-Os' optimization if available, else use -O2, allow Config to override
266 $(eval
$(call check-gcc-var
,-Os
))
267 ifneq ($(CFLAG_-Os
),)
268 OPTIMIZATION
+= $(CFLAG_-Os
)
270 $(eval
$(call check-gcc-var
,-O2
))
271 OPTIMIZATION
+= $(CFLAG_-O2
)
273 # Use the gcc 3.4 -funit-at-a-time optimization when available
274 $(eval
$(call check-gcc-var
,-funit-at-a-time
))
275 OPTIMIZATION-3.4
+= $(CFLAG_-funit-at-a-time
)
276 $(eval
$(call check-gcc-var
,-fstrict-aliasing
))
277 OPTIMIZATION
+= $(CFLAG_-fstrict-aliasing
)
279 # CPU_CFLAGS-y contain options which are not warnings,
280 # not include or library paths, and not optimizations.
282 # Why -funsigned-char: I hunted a bug related to incorrect
283 # sign extension of 'char' type for 10 hours straight. Not fun.
284 CPU_CFLAGS-y
:= -funsigned-char
-fno-builtin
-fcommon
286 $(eval
$(call check-gcc-var
,-fno-asm
))
287 CPU_CFLAGS-y
+= $(CFLAG_-fno-asm
)
288 $(eval
$(call check-gcc-var
,-fmerge-all-constants
))
289 CPU_CFLAGS-y
+= $(CFLAG_-fmerge-all-constants
)
291 ifeq ($(UCLIBC_HAS_SOFT_FLOAT
),y
)
292 ifneq ($(TARGET_ARCH
),bfin
)
293 ifneq ($(TARGET_ARCH
),lm32
)
294 ifneq ($(TARGET_ARCH
),nios2
)
295 ifneq ($(TARGET_ARCH
),nds32
)
296 ifneq ($(TARGET_ARCH
),sh
)
297 ifneq ($(TARGET_ARCH
),c6x
)
298 ifneq ($(TARGET_ARCH
),h8300
)
299 ifneq ($(TARGET_ARCH
),arc
)
300 ifneq ($(TARGET_ARCH
),aarch64
)
301 ifneq ($(TARGET_ARCH
),riscv32
)
302 CPU_CFLAGS-y
+= -msoft-float
315 ifeq ($(TARGET_ARCH
),aarch64
)
316 CPU_CFLAGS-y
+= -ftls-model
=initial-exec
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_CFLAGS-
$(CONFIG_MIPS_NAN_LEGACY
)+=$(call check_gcc
,-mnan
=legacy
)
413 CPU_CFLAGS-
$(CONFIG_MIPS_NAN_2008
)+=$(call check_gcc
,-mnan
=2008)
414 CPU_LDFLAGS-y
+= $(CPU_CFLAGS
)
417 ifeq ($(TARGET_ARCH
),nds32
)
418 CPU_CFLAGS-
$(CONFIG_NDS32_ISA
)+=-march
=nds32
423 ifeq ($(TARGET_ARCH
),sh
)
424 $(eval
$(call check-gcc-var
,-mprefergot
))
425 OPTIMIZATION
+= $(CFLAG_-mprefergot
)
426 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
)+=-ml
427 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
)+=-mb
428 CPU_CFLAGS-
$(CONFIG_SH2
)+=-m2
429 CPU_CFLAGS-
$(CONFIG_SH3
)+=-m3
430 ifeq ($(UCLIBC_HAS_FPU
),y
)
431 CPU_CFLAGS-
$(CONFIG_SH2A
)+=-m2a
432 CPU_CFLAGS-
$(CONFIG_SH4
)+=-m4
433 CPU_CFLAGS-
$(CONFIG_SH4A
)+=-m4a
435 CPU_CFLAGS-
$(CONFIG_SH2A
)+=-m2a-nofpu
436 CPU_CFLAGS-
$(CONFIG_SH4
)+=-m4-nofpu
437 CPU_CFLAGS-
$(CONFIG_SH4A
)+=-m4a-nofpu
441 ifeq ($(TARGET_ARCH
),h8300
)
442 CPU_CFLAGS-
$(CONFIG_H8300H
) += -mh
-mint32
443 CPU_CFLAGS-
$(CONFIG_H8S
) += -ms
-mint32
446 ifeq ($(TARGET_ARCH
),cris
)
447 CPU_LDFLAGS-
$(CONFIG_CRIS
)+=-Wl
,-mcrislinux
448 CPU_LDFLAGS-
$(CONFIG_CRISV32
)+=-Wl
,-mcrislinux
449 CPU_CFLAGS-
$(CONFIG_CRIS
)+=-mlinux
454 ifeq ($(TARGET_ARCH
),csky
)
455 # In csky gas implement, we use $t and $d to detect .text or literal pool.
456 # So we couldn't strip them for objdump.
457 STRIP_FLAGS
+= -K
"$$"t
-K
"$$"d
459 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
) += -mlittle-endian
460 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
) += -mbig-endian
463 ifeq ($(TARGET_ARCH
),kvx
)
464 CPU_CFLAGS-y
+= -march
=$(call qstrip
,$(TARGET_MARCH
))
465 CPU_LDFLAGS-y
+= -march
=$(call qstrip
,$(TARGET_MARCH
))
468 ifeq ($(TARGET_ARCH
),m68k
)
469 # -fPIC is only supported for 68020 and above. It is not supported
470 # for 68000, 68010, or Coldfire.
475 ifeq ($(TARGET_ARCH
),powerpc
)
476 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
477 # enough. Therefore use -fpic which will reduce code size and generates
481 PPC_HAS_REL16
:=$(shell printf
"\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha\n" |
$(CC
) -c
-x assembler
-o
/dev
/null
- 2> /dev
/null
&& echo
-n y || echo
-n n
)
482 PPC_HAS_SECUREPLT
:=$(shell $(CC
) --verbose
2>&1 | grep
-- --enable-secureplt
> /dev
/null
&& echo
-n y || echo
-n n
)
483 CPU_CFLAGS-
$(PPC_HAS_SECUREPLT
) += -DPPC_HAS_SECUREPLT
484 CPU_CFLAGS-
$(PPC_HAS_REL16
)+= -DHAVE_ASM_PPC_REL16
485 CPU_CFLAGS-
$(CONFIG_E500
) += "-D__NO_MATH_INLINES"
488 ifeq ($(TARGET_ARCH
),bfin
)
490 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF
),y
)
491 CPU_CFLAGS-y
:=-mfdpic
492 CPU_LDFLAGS-y
+= -Wl
,-melf32bfinfd
496 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT
),y
)
497 PICFLAG
:= -mleaf-id-shared-library
501 ifeq ($(TARGET_ARCH
),frv
)
502 # Using -pie causes the program to have an interpreter, which is
503 # forbidden, so we must make do with -shared. Unfortunately,
504 # -shared by itself would get us global function descriptors
505 # and calls through PLTs, dynamic resolution of symbols, etc,
506 # which would break as well, but -Bsymbolic comes to the rescue.
507 CPU_LDFLAGS-y
+= -Wl
,-melf32frvfd
-Wl
,-Bsymbolic
510 ifeq ($(strip $(TARGET_ARCH
)),avr32
)
511 CPU_CFLAGS-
$(CONFIG_AVR32_AP7
) += -march
=ap
512 CPU_CFLAGS-
$(CONFIG_LINKRELAX
) += -mrelax
513 CPU_LDFLAGS-
$(CONFIG_LINKRELAX
) += --relax
516 ifeq ($(TARGET_ARCH
),c6x
)
518 CPU_CFLAGS-
$(CONFIG_TMS320C64X
) += -march
=c64x
519 CPU_CFLAGS-
$(CONFIG_TMS320C64XPLUS
) += -march
=c64x
+
520 CPU_CFLAGS-
$(ARCH_LITTLE_ENDIAN
)+=-mlittle-endian
521 CPU_CFLAGS-
$(ARCH_BIG_ENDIAN
)+=-mbig-endian
522 CPU_LDFLAGS-y
+= $(CPU_CFLAGS
)
525 $(eval
$(call check-gcc-var
,$(PIEFLAG_NAME
)))
526 PIEFLAG
:= $(CFLAG_
$(PIEFLAG_NAME
))
528 PIEFLAG
:= $(PICFLAG
)
530 # We need to keep track of both the CC PIE flag (above) as
531 # well as the LD PIE flag (below) because we can't rely on
532 # gcc passing -pie if we used -fPIE. We need to directly use -pie
533 # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
534 $(eval
$(call cache-output-var
,LDPIEFLAG
,$(CC
) -Wl
$(comma
)--help
2>/dev
/null | grep
-q
-- -pie
&& echo
"-pie"))
536 # Check for --as-needed support in linker
537 ifndef LD_FLAG_ASNEEDED
538 _LD_FLAG_ASNEEDED
:=$(shell $(CC
) -Wl
,--help
2>/dev
/null | grep
-- --as-needed
)
539 ifneq ($(_LD_FLAG_ASNEEDED
),)
540 export LD_FLAG_ASNEEDED
:=--as-needed
543 ifndef LD_FLAG_NO_ASNEEDED
544 ifdef LD_FLAG_ASNEEDED
545 export LD_FLAG_NO_ASNEEDED
:=--no-as-needed
548 ifndef CC_FLAG_ASNEEDED
549 ifdef LD_FLAG_ASNEEDED
550 export CC_FLAG_ASNEEDED
:=-Wl
,$(LD_FLAG_ASNEEDED
)
553 ifndef CC_FLAG_NO_ASNEEDED
554 ifdef LD_FLAG_NO_ASNEEDED
555 export CC_FLAG_NO_ASNEEDED
:=-Wl
,$(LD_FLAG_NO_ASNEEDED
)
558 link.asneeded
= $(if
$(CC_FLAG_ASNEEDED
),$(if
$(CC_FLAG_NO_ASNEEDED
),$(CC_FLAG_ASNEEDED
) $(1) $(CC_FLAG_NO_ASNEEDED
)))
560 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
562 export ASNEEDED
:=$(shell $(CC
) -Wl
,--help
2>/dev
/null | grep
-q
-- --as-needed
&& echo
"AS_NEEDED ( $(UCLIBC_LDSO) )" || echo
"$(UCLIBC_LDSO)")
565 # Add a bunch of extra pedantic annoyingly strict checks
566 WARNING_FLAGS
= -Wstrict-prototypes
-Wstrict-aliasing
-Wno-nonnull-compare
567 ifeq ($(EXTRA_WARNINGS
),y
)
570 -Wnodeclaration-after-statement \
573 -Wmissing-format-attribute \
574 -Wmissing-prototypes \
575 -Wmissing-declarations \
578 -Wold-style-declaration \
579 -Wold-style-definition \
583 WARNING_FLAGS
+= $(WARNING_FLAGS-gcc-
$(GCC_MAJOR_VER
))
584 $(foreach w
,$(WARNING_FLAGS
),$(eval
$(call check-gcc-var
,$(w
))))
585 XWARNINGS
= $(call qstrip
,$(WARNINGS
)) $(foreach w
,$(WARNING_FLAGS
),$(CFLAG_
$(w
)))
587 CPU_CFLAGS
=$(call qstrip
,$(CPU_CFLAGS-y
))
589 # Save the tested flag in a single variable and force it to be
590 # evaluated just once. Then use that computed value.
591 $(eval
$(call check-gcc-var
,-fno-stack-protector
))
592 SSP_DISABLE_FLAGS ?
= $(CFLAG_-fno-stack-protector
)
593 ifeq ($(UCLIBC_BUILD_SSP
),y
)
594 $(eval
$(call check-gcc-var
,-fno-stack-protector-all
))
595 $(eval
$(call check-gcc-var
,-fstack-protector
))
596 $(eval
$(call check-gcc-var
,-fstack-protector-all
))
597 SSP_CFLAGS
:= $(CFLAG_-fno-stack-protector-all
)
598 SSP_CFLAGS
+= $(CFLAG_-fstack-protector
)
599 SSP_ALL_CFLAGS ?
= $(CFLAG_-fstack-protector-all
)
601 SSP_CFLAGS
:= $(SSP_DISABLE_FLAGS
)
604 # Collect all CFLAGS components
605 CFLAGS
:= $(XWARNINGS
) $(CPU_CFLAGS
) $(SSP_CFLAGS
) \
606 -nostdinc
-I
$(top_builddir
)include \
607 -I
$(top_srcdir
)include -include libc-symbols.h \
608 -I
$(top_srcdir
)libc
/sysdeps
/linux
/$(TARGET_ARCH
) \
609 -I
$(top_srcdir
)libc
/sysdeps
/linux \
610 -I
$(top_srcdir
)ldso
/ldso
/$(TARGET_ARCH
) \
611 -I
$(top_srcdir
)ldso
/include -I.
613 # We need this to be checked within libc-symbols.h
614 ifneq ($(HAVE_SHARED
),y
)
618 $(eval
$(call check-ld-var
,--warn-once
))
619 $(eval
$(call check-ld-var
,--sort-common
))
620 $(eval
$(call check-ld-var
,--discard-all
))
621 LDFLAGS_NOSTRIP
:=$(LDFLAG-fuse-ld
) $(CPU_LDFLAGS-y
) -shared \
622 -Wl
,--warn-common
$(CFLAG_-Wl--warn-once
) -Wl
,-z
,combreloc
624 ifeq ($(UCLIBC_BUILD_RELRO
),y
)
625 LDFLAGS_NOSTRIP
+=-Wl
,-z
,relro
628 ifeq ($(UCLIBC_BUILD_NOW
),y
)
629 LDFLAGS_NOSTRIP
+=-Wl
,-z
,now
632 ifeq ($(LDSO_GNU_HASH_SUPPORT
),y
)
633 # Be sure that binutils support it
634 $(eval
$(call check-ld-var
,--hash-style
=gnu
))
635 ifeq ($(LDFLAG_--hash-style
=gnu
),)
636 ifneq ($(filter-out $(clean_targets
) CLEAN_
% install_headers headers-y
,$(MAKECMDGOALS
)),)
637 $(error Your binutils do not support
--hash-style option
, while you want to use it
)
640 LDFLAGS_NOSTRIP
+= $(CFLAG_-Wl--hash-style
=gnu
)
645 CFLAGS
+= -O0
-g3
-DDEBUG
647 CFLAGS
+= $(OPTIMIZATION
)
648 CFLAGS
+= $(OPTIMIZATION-
$(GCC_MAJOR_VER
))
649 CFLAGS
+= $(OPTIMIZATION-
$(GCC_MAJOR_VER
).
$(GCC_MINOR_VER
))
650 $(eval
$(call check-ld-var
,-O2
))
651 LDFLAGS_NOSTRIP
+= $(CFLAG_-Wl-O2
)
654 LDFLAGS
:=$(LDFLAGS_NOSTRIP
) -Wl
,-z
,defs
659 STRIPTOOL
:= true
-Stripping_disabled
662 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS
)),"")
663 CFLAGS
+= $(call qstrip
,$(UCLIBC_EXTRA_CFLAGS
))
665 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS
)),"")
666 LDFLAGS
+= $(call qstrip
,$(UCLIBC_EXTRA_LDFLAGS
))
669 ifeq ($(UCLIBC_HAS_STDIO_FUTEXES
),y
)
670 CFLAGS
+= -D__USE_STDIO_FUTEXES__
673 ifeq ($(UCLIBC_HAS_THREADS
),y
)
674 ifeq ($(UCLIBC_HAS_THREADS_NATIVE
),y
)
676 CFLAGS
+= -DHAVE_FORCED_UNWIND
-D_LIBC_REENTRANT
678 ifeq ($(UCLIBC_HAS_LINUXTHREADS
),y
)
679 PTNAME
:= linuxthreads
682 PTDIR
:= libpthread
/$(PTNAME
)
683 # set up system dependencies include dirs (NOTE: order matters!)
684 ifeq ($(UCLIBC_HAS_THREADS_NATIVE
),y
)
685 PTINC
:= -I
$(top_builddir
)$(PTDIR
) \
686 -I
$(top_srcdir
)$(PTDIR
) \
687 $(if
$(TARGET_SUBARCH
),-I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux
/$(TARGET_ARCH
)/$(TARGET_SUBARCH
)) \
688 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux
/$(TARGET_ARCH
) \
689 -I
$(top_builddir
)$(PTDIR
)/sysdeps
/$(TARGET_ARCH
) \
690 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/$(TARGET_ARCH
) \
691 -I
$(top_builddir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux \
692 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux \
693 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/pthread \
694 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/pthread
/bits \
695 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/generic
697 # Test for TLS if NPTL support was selected.
699 GCC_HAS_TLS
=$(shell \
700 echo
"extern __thread int foo;" |
$(CC
) -o
/dev
/null
-S
-xc
- 2>&1)
701 ifneq ($(GCC_HAS_TLS
),)
704 @echo
"#### Your compiler does not support TLS and you are trying to build uClibc-ng";
705 @echo
"#### with NPTL support. Upgrade your binutils and gcc to versions which";
706 @echo
"#### support TLS for your architecture. Do not contact uClibc-ng maintainers";
707 @echo
"#### about this problem.";
709 @echo
"#### Exiting...";
715 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux
/$(TARGET_ARCH
) \
716 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/$(TARGET_ARCH
) \
717 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/unix
/sysv
/linux \
718 -I
$(top_srcdir
)$(PTDIR
)/sysdeps
/pthread \
719 -I
$(top_srcdir
)$(PTDIR
) \
720 -I
$(top_srcdir
)libpthread
727 CFLAGS
+= -I
$(top_srcdir
)libc
/sysdeps
/linux
/common
729 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
730 $(eval
$(call cache-output-var
,CC_IPREFIX
,$(CC
) -print-file-name
=include))
731 CC_INC
:= -isystem
$(dir $(CC_IPREFIX
))include-fixed
-isystem
$(CC_IPREFIX
)
734 CFLAGS
+= -I
$(KERNEL_HEADERS
)
736 ifneq ($(DOASSERTS
),y
)
740 ifeq ($(SYMBOL_PREFIX
),_
)
741 CFLAGS
+=-D__UCLIBC_UNDERSCORES__
744 # Keep the check_as from being needlessly executed
745 ifeq ($(UCLIBC_BUILD_NOEXECSTACK
),y
)
746 $(eval
$(call check-as-var
,--noexecstack
))
748 ASFLAGS
+= $(ASFLAG_--noexecstack
)
750 LIBGCC_CFLAGS ?
= $(CFLAGS
) $(CPU_CFLAGS-y
)
751 $(eval
$(call cache-output-var
,LIBGCC_A
,$(CC
) $(LIBGCC_CFLAGS
) -print-libgcc-file-name
))
752 $(eval
$(call cache-output-var
,LIBGCC_EH
,$(CC
) $(LIBGCC_CFLAGS
) -print-file-name
=libgcc_eh.a
))
753 # with -O0 we (e.g. lockf) might end up with references to
754 # _Unwind_Resume, so pull in gcc_eh in this case..
755 # with a --disable-shared toolchain, libgcc_eh.a and libgcc.a are combined
756 # in libgcc.a, so check if the printed file exist, before adding to the commandline
757 LIBGCC_EH_FILE
:= $(shell if
[ -f
$(LIBGCC_EH
) ]; then echo
$(LIBGCC_EH
); fi
)
758 LIBGCC_DIR
:= $(dir $(LIBGCC_A
))
759 LIBGCC
:= $(LIBGCC_A
) $(if
$(DODEBUG
),$(LIBGCC_EH_FILE
))
761 # moved from libpthread/linuxthreads
762 ifeq ($(UCLIBC_CTOR_DTOR
),y
)
763 SHARED_START_FILES
:=$(top_builddir
)lib
/crti.o
$(LIBGCC_DIR
)crtbeginS.o
764 SHARED_END_FILES
:=$(LIBGCC_DIR
)crtendS.o
$(top_builddir
)lib
/crtn.o
767 LOCAL_INSTALL_PATH
:= $(if
$(O
),$(O
)/)install_dir
769 PTHREAD_GENERATE_MANGLE ?
= -n
"s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p"