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.$(ABI_VERSION)
142 UCLIBC_LDSO_NAME := ld-uClibc
143 ARCH_NATIVE_BIT := 32
144 ifneq ($(findstring $(TARGET_ARCH),hppa64 ia64 powerpc64 s390x sparc64 x86_64),)
145 UCLIBC_LDSO_NAME := ld64-uClibc
146 ARCH_NATIVE_BIT := 64
148 ifeq ($(CONFIG_MIPS_N64_ABI),y)
149 UCLIBC_LDSO_NAME := ld64-uClibc
150 ARCH_NATIVE_BIT := 64
154 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION)
155 NONSHARED_LIBNAME := uclibc_nonshared.a
156 libc := $(top_builddir)lib/$(SHARED_LIBNAME)
157 libc.depend := $(top_builddir)lib/$(SHARED_LIBNAME:.$(ABI_VERSION)=)
158 ifneq ($(ARCH_HAS_NO_SHARED),y)
159 libdl.depend := $(top_builddir)lib/libdl.so
161 ifneq ($(HAS_NO_THREADS),y)
162 libpthread.depend := $(top_builddir)lib/libpthread.so
164 interp := $(top_builddir)lib/interp.os
165 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
166 headers_dep := $(top_builddir)include/bits/sysnum.h
167 sub_headers := $(headers_dep)
169 #LIBS :=$(interp) -L$(top_builddir)lib -lc
170 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(ABI_VERSION)=)
172 # Make sure DESTDIR and PREFIX can be used to install
173 # PREFIX is a uClibcism while DESTDIR is a common GNUism
178 ifneq ($(HAVE_SHARED),y)
187 ifeq ($(CROSS_COMPILE),)
188 CROSS_COMPILE=$(call qstrip,$(CROSS_COMPILER_PREFIX))
191 # A nifty macro to make testing gcc features easier
193 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
194 then echo "$(1)"; else echo "$(2)"; fi)
196 if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
197 then echo "-Wa,$(1)"; fi)
199 if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
200 then echo "$(1)"; fi)
202 # Use variable indirection here so that we can have variable
203 # names with fun chars in them like equal signs
204 define check-tool-var
205 ifeq ($(filter $(clean_targets) CLEAN_%,$(MAKECMDGOALS)),)
208 $$(_v) := $$(call $(1),$(subst %, ,$(3)))
214 # Usage: check-gcc-var,<flag>
215 # Check the C compiler to see if it supports <flag>.
216 # Export the variable CFLAG_<flag> if it does.
218 $(call check-tool-var,check_gcc,CFLAG,$(1))
220 # Usage: check-as-var,<flag>
221 # Check the assembler to see if it supports <flag>. Export the
222 # variable ASFLAG_<flag> if it does (for invoking the assembler),
223 # as well CFLAG_-Wa<flag> (for invoking the compiler driver).
225 $(call check-tool-var,check_as,ASFLAG,$(1))
227 export $$(_v) = $$(if $$(ASFLAG_$(1)),-Wa$$(comma)$$(ASFLAG_$(1)))
229 # Usage: check-ld-var,<flag>
230 # Check the linker to see if it supports <flag>. Export the
231 # variable LDFLAG_<flag> if it does (for invoking the linker),
232 # as well CFLAG_-Wl<flag> (for invoking the compiler driver).
234 $(call check-tool-var,check_ld,LDFLAG,$(1))
236 export $$(_v) = $$(if $$(LDFLAG_$(1)),-Wl$$(comma)$$(LDFLAG_$(1)))
238 # Usage: cache-output-var,<variable>,<shell command>
239 # Execute <shell command> and cache the output in <variable>.
240 define cache-output-var
242 $(1) := $$(shell $(2))
251 # Flags in OPTIMIZATION are used only for non-debug builds
254 # Use '-Os' optimization if available, else use -O2, allow Config to override
255 $(eval $(call check-gcc-var,-Os))
256 ifneq ($(CFLAG_-Os),)
257 OPTIMIZATION += $(CFLAG_-Os)
259 $(eval $(call check-gcc-var,-O2))
260 OPTIMIZATION += $(CFLAG_-O2)
262 # Use the gcc 3.4 -funit-at-a-time optimization when available
263 $(eval $(call check-gcc-var,-funit-at-a-time))
264 OPTIMIZATION += $(CFLAG_-funit-at-a-time)
265 # shrinks code by about 0.1%
266 $(eval $(call check-gcc-var,-fmerge-all-constants))
267 $(eval $(call check-gcc-var,-fstrict-aliasing))
268 OPTIMIZATION += $(CFLAG_-fmerge-all-constants) $(CFLAG_-fstrict-aliasing)
270 $(eval $(call cache-output-var,GCC_VER,$(CC) -dumpversion))
271 GCC_VER := $(subst ., ,$(GCC_VER))
272 GCC_MAJOR_VER ?= $(word 1,$(GCC_VER))
273 #GCC_MINOR_VER ?= $(word 2,$(GCC_VER))
275 ifeq ($(GCC_MAJOR_VER),4)
276 # shrinks code, results are from 4.0.2
278 $(eval $(call check-gcc-var,-fno-tree-loop-optimize))
279 OPTIMIZATION += $(CFLAG_-fno-tree-loop-optimize)
281 $(eval $(call check-gcc-var,-fno-tree-dominator-opts))
282 OPTIMIZATION += $(CFLAG_-fno-tree-dominator-opts)
284 $(eval $(call check-gcc-var,-fno-strength-reduce))
285 OPTIMIZATION += $(CFLAG_-fno-strength-reduce)
289 # CPU_CFLAGS-y contain options which are not warnings,
290 # not include or library paths, and not optimizations.
292 # Why -funsigned-char: I hunted a bug related to incorrect
293 # sign extension of 'char' type for 10 hours straight. Not fun.
294 CPU_CFLAGS-y := -funsigned-char -fno-builtin
296 $(eval $(call check-gcc-var,-fno-asm))
297 CPU_CFLAGS-y += $(CFLAG_-fno-asm)
300 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
301 # If -msoft-float isn't supported, we want an error anyway.
302 # Hmm... might need to revisit this for arm since it has 2 different
303 # soft float encodings.
304 ifneq ($(TARGET_ARCH),nios)
305 ifneq ($(TARGET_ARCH),nios2)
306 ifneq ($(TARGET_ARCH),sh)
307 ifneq ($(TARGET_ARCH),c6x)
308 CPU_CFLAGS-y += -msoft-float
313 ifeq ($(TARGET_ARCH),arm)
314 # No longer needed with current toolchains, but leave it here for now.
315 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
316 # LDADD_LIBFLOAT=-lfloat
320 $(eval $(call check-gcc-var,-std=gnu99))
321 CPU_CFLAGS-y += $(CFLAG_-std=gnu99)
323 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
324 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
326 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
327 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN) += -Wl,-EB
330 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
331 PICFLAG-$(UCLIBC_FORMAT_DSBT_ELF) := -mdsbt -fpic
332 PICFLAG := $(PICFLAG-y)
335 # Some nice CPU specific optimizations
336 ifeq ($(TARGET_ARCH),i386)
337 $(eval $(call check-gcc-var,-fomit-frame-pointer))
338 OPTIMIZATION += $(CFLAG_-fomit-frame-pointer)
340 ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586),y)
341 # TODO: Change this to a gcc version check. This bug
342 # should be fixed with at least gcc-4.3.
343 # Non-SSE capable processor.
344 # NB: this may make SSE insns segfault!
345 # -O1 -march=pentium3, -Os -msse etc are known to be affected.
346 # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
347 # -m32 is needed if host is 64-bit
348 OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
350 $(eval $(call check-gcc-var,-mpreferred-stack-boundary=4))
351 OPTIMIZATION += $(CFLAG_-mpreferred-stack-boundary=4)
354 # Choice of alignment (please document why!)
355 # -falign-labels: in-line labels
356 # (reachable by normal code flow, aligning will insert nops
357 # which will be executed - may even make things slower)
358 # -falign-jumps: reachable only by a jump
359 # Generic: no alignment at all (smallest code)
360 GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
361 OPTIMIZATION+=$(GCC_FALIGN)
363 # Putting each function and data object into its own section
364 # allows for kbytes of less text if users link against static uclibc
365 # using ld --gc-sections.
366 # ld 2.18 can't do that (yet?) for shared libraries, so we itself
367 # do not use --gc-sections at shared lib link time.
368 # However, in combination with sections being sorted by alignment
369 # it does result in much reduced padding:
370 # text data bss dec hex
371 # 235319 1472 5992 242783 3b45f old.so
372 # 234104 1472 5980 241556 3af94 new.so
373 # Without -ffunction-sections, all functions will get aligned
374 # to 4 byte boundary by as/ld. This is arguably a bug in as.
375 # It specifies 4 byte align for .text even if not told to do so:
376 # Idx Name Size VMA LMA File off Algn
377 # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
378 CPU_CFLAGS-y += $(CFLAG_-ffunction-sections) $(CFLAG_-fdata-sections)
379 CPU_LDFLAGS-y += $(CFLAG_-Wl--sort-common)
380 $(eval $(call check-ld-var,--sort-section=alignment))
381 CPU_LDFLAGS-y += $(CFLAG_-Wl--sort-section=alignment)
387 ifeq ($(TARGET_ARCH),sparc)
388 CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
389 CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
390 CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
391 CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
394 ifeq ($(TARGET_ARCH),arm)
395 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
396 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
397 CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb
400 ifeq ($(TARGET_ARCH),metag)
402 CPU_CFLAGS-$(CONFIG_META_1_2)+=
403 CPU_CFLAGS-$(CONFIG_META_2_1)+=-Wa,-mcpu=metac21
406 ifeq ($(TARGET_ARCH),mips)
407 OPTIMIZATION+=-mno-split-addresses
408 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
409 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
410 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
411 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
412 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
413 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
414 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
415 ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
416 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
417 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
419 ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
420 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
421 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
423 CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
424 CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
425 CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
428 ifeq ($(TARGET_ARCH),nios)
429 OPTIMIZATION+=-funaligned-struct-hack
430 CPU_LDFLAGS-y+=-Wl,-m32
431 CPU_CFLAGS-y+=-Wl,-m32
434 ifeq ($(TARGET_ARCH),sh)
435 $(eval $(call check-gcc-var,-mprefergot))
436 OPTIMIZATION += $(CFLAG_-mprefergot)
437 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
438 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
439 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
440 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
441 ifeq ($(UCLIBC_HAS_FPU),y)
442 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
443 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
445 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
446 CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
450 ifeq ($(TARGET_ARCH),sh64)
451 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
452 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
453 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
456 ifeq ($(TARGET_ARCH),h8300)
458 CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
459 CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
460 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
461 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
464 ifeq ($(TARGET_ARCH),i960)
465 OPTIMIZATION+=-mh -mint32 #-fsigned-char
468 ifeq ($(TARGET_ARCH),e1)
469 OPTIMIZATION+=-mgnu-param
472 ifeq ($(TARGET_ARCH),cris)
473 CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
474 CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
475 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
480 ifeq ($(TARGET_ARCH),m68k)
481 # -fPIC is only supported for 68020 and above. It is not supported
482 # for 68000, 68010, or Coldfire.
487 ifeq ($(TARGET_ARCH),powerpc)
488 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
489 # enough. Therefore use -fpic which will reduce code size and generates
493 PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
494 CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
495 CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
499 ifeq ($(TARGET_ARCH),bfin)
501 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
502 CPU_CFLAGS-y:=-mfdpic
503 CPU_LDFLAGS-y += -Wl,-melf32bfinfd
507 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
508 PICFLAG := -mleaf-id-shared-library
512 ifeq ($(TARGET_ARCH),frv)
513 CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
514 # Using -pie causes the program to have an interpreter, which is
515 # forbidden, so we must make do with -shared. Unfortunately,
516 # -shared by itself would get us global function descriptors
517 # and calls through PLTs, dynamic resolution of symbols, etc,
518 # which would break as well, but -Bsymbolic comes to the rescue.
519 export LDPIEFLAG:=-shared -Wl,-Bsymbolic
523 ifeq ($(strip $(TARGET_ARCH)),avr32)
524 CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
525 CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
526 CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
529 ifeq ($(TARGET_ARCH),i960)
533 ifeq ($(TARGET_ARCH),v850)
537 ifeq ($(TARGET_ARCH),c6x)
539 CPU_CFLAGS-$(CONFIG_TMS320C64X) += -march=c64x
540 CPU_CFLAGS-$(CONFIG_TMS320C64XPLUS) += -march=c64x+
541 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
542 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
543 CPU_LDFLAGS-y += $(CPU_CFLAGS)
546 $(eval $(call check-gcc-var,$(PIEFLAG_NAME)))
547 PIEFLAG := $(CFLAG_$(PIEFLAG_NAME))
549 PIEFLAG := $(PICFLAG)
551 # We need to keep track of both the CC PIE flag (above) as
552 # well as the LD PIE flag (below) because we can't rely on
553 # gcc passing -pie if we used -fPIE. We need to directly use -pie
554 # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
555 $(eval $(call cache-output-var,LDPIEFLAG,$(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie"))
557 # Check for --as-needed support in linker
558 ifndef LD_FLAG_ASNEEDED
559 _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
560 ifneq ($(_LD_FLAG_ASNEEDED),)
561 export LD_FLAG_ASNEEDED:=--as-needed
564 ifndef LD_FLAG_NO_ASNEEDED
565 ifdef LD_FLAG_ASNEEDED
566 export LD_FLAG_NO_ASNEEDED:=--no-as-needed
569 ifndef CC_FLAG_ASNEEDED
570 ifdef LD_FLAG_ASNEEDED
571 export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
574 ifndef CC_FLAG_NO_ASNEEDED
575 ifdef LD_FLAG_NO_ASNEEDED
576 export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
579 link.asneeded = $(if $(findstring yy,$(CC_FLAG_ASNEEDED)$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
581 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
583 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
585 # Only used in installed libc.so linker script
586 ifeq ($(UCLIBC_HAS_BACKTRACE),y)
587 ifeq ($(HARDWIRED_ABSPATH),y)
588 UBACKTRACE_FULL_NAME := $(subst //,/,$(RUNTIME_PREFIX)$(MULTILIB_DIR)/$(UBACKTRACE_DSO))
590 UBACKTRACE_FULL_NAME := $(UBACKTRACE_DSO)
592 export UBACKTRACE_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && \
593 echo "GROUP ( AS_NEEDED ( $(UBACKTRACE_FULL_NAME) ) )" || \
594 echo "GROUP ( $(UBACKTRACE_FULL_NAME) )")
596 export UBACKTRACE_ASNEEDED:=""
600 # Add a bunch of extra pedantic annoyingly strict checks
601 WARNING_FLAGS = -Wstrict-prototypes -Wstrict-aliasing
602 ifeq ($(EXTRA_WARNINGS),y)
606 -Wmissing-format-attribute \
607 -Wmissing-prototypes \
608 -Wmissing-declarations \
611 -Wold-style-declaration \
612 -Wold-style-definition \
615 # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
616 WARNING_FLAGS-gcc-4 += -Wdeclaration-after-statement
618 WARNING_FLAGS += $(WARNING_FLAGS-gcc-$(GCC_MAJOR_VER))
619 $(foreach w,$(WARNING_FLAGS),$(eval $(call check-gcc-var,$(w))))
620 XWARNINGS = $(call qstrip,$(WARNINGS)) $(foreach w,$(WARNING_FLAGS),$(CFLAG_$(w)))
622 CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
624 # Save the tested flag in a single variable and force it to be
625 # evaluated just once. Then use that computed value.
626 $(eval $(call check-gcc-var,-fno-stack-protector))
627 SSP_DISABLE_FLAGS ?= $(CFLAG_-fno-stack-protector)
628 ifeq ($(UCLIBC_BUILD_SSP),y)
629 $(eval $(call check-gcc-var,-fno-stack-protector-all))
630 $(eval $(call check-gcc-var,-fstack-protector))
631 $(eval $(call check-gcc-var,-fstack-protector-all))
632 SSP_CFLAGS := $(CFLAG_-fno-stack-protector-all)
633 SSP_CFLAGS += $(CFLAG_-fstack-protector)
634 SSP_ALL_CFLAGS ?= $(CFLAG_-fstack-protector-all)
636 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
639 $(eval $(call check-gcc-var,-nostdlib))
641 # Collect all CFLAGS components
642 CFLAGS := $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
643 -nostdinc -I$(top_builddir)include \
644 -I$(top_srcdir)include -include libc-symbols.h \
645 -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH) \
646 -I$(top_srcdir)libc/sysdeps/linux \
647 -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
648 -I$(top_srcdir)ldso/include -I.
649 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
650 CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
653 # We need this to be checked within libc-symbols.h
654 ifneq ($(HAVE_SHARED),y)
658 $(eval $(call check-ld-var,--warn-once))
659 $(eval $(call check-ld-var,--sort-common))
660 $(eval $(call check-ld-var,--discard-all))
661 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
662 -Wl,--warn-common $(CFLAG_-Wl--warn-once) -Wl,-z,combreloc
663 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
664 #$(eval $(call check-ld-var,--gc-sections))
665 #LDFLAGS_NOSTRIP += $(LDFLAG_--gc-sections)
667 $(eval $(call check-gcc-var,-fdata-sections))
668 $(eval $(call check-gcc-var,-ffunction-sections))
670 ifeq ($(UCLIBC_BUILD_RELRO),y)
671 LDFLAGS_NOSTRIP+=-Wl,-z,relro
674 ifeq ($(UCLIBC_BUILD_NOW),y)
675 LDFLAGS_NOSTRIP+=-Wl,-z,now
678 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
679 # Be sure that binutils support it
680 $(eval $(call check-ld-var,--hash-style=gnu))
681 ifeq ($(LDFLAG_--hash-style=gnu),)
682 ifneq ($(filter-out $(clean_targets) CLEAN_% install_headers headers-y,$(MAKECMDGOALS)),)
683 $(error Your binutils do not support --hash-style option, while you want to use it)
686 LDFLAGS_NOSTRIP += $(CFLAG_-Wl--hash-style=gnu)
690 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
692 CFLAGS += -O0 -g3 -DDEBUG
694 CFLAGS += $(OPTIMIZATION)
699 STRIPTOOL := true -Stripping_disabled
701 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
702 CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
706 # we try to compile all sources at once into an object (IMA), but
707 # gcc-3.3.x does not support it
708 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
709 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
710 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
711 ifeq ($(GCC_MAJOR_VER),3)
714 $(eval $(call check-gcc-var,--combine))
715 CFLAGS += $(CFLAG_--combine)
721 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
722 LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
725 ifeq ($(UCLIBC_HAS_THREADS),y)
726 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
728 CFLAGS += -DHAVE_FORCED_UNWIND
730 ifeq ($(LINUXTHREADS_OLD),y)
731 PTNAME := linuxthreads.old
733 PTNAME := linuxthreads
736 PTDIR := libpthread/$(PTNAME)
737 # set up system dependencies include dirs (NOTE: order matters!)
738 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
739 PTINC:= -I$(top_builddir)$(PTDIR) \
740 -I$(top_srcdir)$(PTDIR) \
741 $(if $(TARGET_SUBARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
742 -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
743 -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
744 -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
745 -I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux \
746 -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
747 -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
748 -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits \
749 -I$(top_srcdir)$(PTDIR)/sysdeps/generic
751 # Test for TLS if NPTL support was selected.
753 GCC_HAS_TLS=$(shell \
754 echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
755 ifneq ($(GCC_HAS_TLS),)
758 @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
759 @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
760 @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
761 @echo "#### about this problem.";
763 @echo "#### Exiting...";
769 -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
770 -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
771 -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
772 -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
773 -I$(top_srcdir)$(PTDIR) \
774 -I$(top_srcdir)libpthread
781 CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
783 #CFLAGS += -iwithprefix include-fixed -iwithprefix include
784 $(eval $(call cache-output-var,CC_IPREFIX,$(CC) -print-file-name=include))
785 CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
788 CFLAGS += -I$(KERNEL_HEADERS)
790 ifneq ($(DOASSERTS),y)
794 ifeq ($(SYMBOL_PREFIX),_)
795 CFLAGS+=-D__UCLIBC_UNDERSCORES__
798 # Keep the check_as from being needlessly executed
799 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
800 $(eval $(call check-as-var,--noexecstack))
802 ASFLAGS = $(ASFLAG_--noexecstack)
804 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
805 $(eval $(call cache-output-var,LIBGCC,$(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name))
806 $(eval $(call cache-output-var,LIBGCC_EH,$(CC) $(LIBGCC_CFLAGS) -print-file-name=libgcc_eh.a))
807 # with -O0 we (e.g. lockf) might end up with references to
808 # _Unwind_Resume, so pull in gcc_eh in this case..
809 LIBGCC_DIR:=$(dir $(LIBGCC))
810 LIBGCC += $(if $(DODEBUG),$(LIBGCC_EH))
812 # moved from libpthread/linuxthreads
813 ifeq ($(UCLIBC_CTOR_DTOR),y)
814 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
815 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
818 LOCAL_INSTALL_PATH := $(if $(O),$(O)/)install_dir
820 PTHREAD_GENERATE_MANGLE ?= -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p"