1 # Rules.make for uClibc
3 # Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
5 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
8 # check for proper make version
9 ifneq ($(findstring 3.7,$(MAKE_VERSION)),)
10 $(error Your make is too old $(MAKE_VERSION). Go get at least 3.80)
13 #-----------------------------------------------------------
14 # This file contains rules which are shared between multiple
15 # Makefiles. All normal configuration options live in the
16 # file named ".config". Don't mess with this file unless
17 # you know what you are doing.
20 #-----------------------------------------------------------
21 # If you are running a cross compiler, you will want to set
22 # 'CROSS' to something more interesting ... Target
23 # architecture is determined by asking the CC compiler what
24 # arch it compiles things for, so unless your compiler is
25 # broken, you should not need to specify TARGET_ARCH.
27 # Most people will set this stuff on the command line, i.e.
28 # make CROSS=arm-linux-
29 # will build uClibc for 'arm'.
38 STRIPTOOL = $(CROSS)strip
45 STRIP_FLAGS ?= -x -R .note -R .comment
47 # Select the compiler needed to build binaries for your development system
49 BUILD_CFLAGS = -O2 -Wall
50 export ARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
51 -e s/arm.*/arm/ -e s/sa110/arm/ -e s/sh.*/sh/ \
52 -e s/s390x/s390/ -e s/parisc.*/hppa/ \
53 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
54 -e s/xtensa.*/xtensa/ )
57 #---------------------------------------------------------
58 # Nothing beyond this point should ever be touched by mere
59 # mortals. Unless you hang out with the gods, you should
60 # probably leave all this stuff alone.
62 # Pull in the user's uClibc configuration
63 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
64 -include $(top_builddir).config
67 # Make certain these contain a final "/", but no "//"s.
68 TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
69 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
70 TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | sed -e 's/^TARGET_SUBARCH=//' -e 's/"//g')
71 TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
72 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
73 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
74 KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
75 export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
78 # Now config hard core
83 VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
84 ifneq ($(EXTRAVERSION),)
85 VERSION := $(VERSION)$(EXTRAVERSION)
87 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
89 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
92 SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
93 ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
94 UCLIBC_LDSO_NAME := ld64-uClibc
96 UCLIBC_LDSO_NAME := ld-uClibc
98 UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
99 NONSHARED_LIBNAME := uclibc_nonshared.a
100 libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
101 interp := $(top_builddir)lib/interp.os
102 ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
103 headers_dep := $(top_builddir)include/bits/sysnum.h
104 sub_headers := $(headers_dep)
106 #LIBS :=$(interp) -L$(top_builddir)lib -lc
107 LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
109 # Make sure DESTDIR and PREFIX can be used to install
110 # PREFIX is a uClibcism while DESTDIR is a common GNUism
115 ifneq ($(HAVE_SHARED),y)
125 CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
128 # A nifty macro to make testing gcc features easier
130 if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
131 then echo "$(1)"; else echo "$(2)"; fi)
133 if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
134 then echo "-Wa,$(1)"; fi)
136 if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
137 then echo "$(1)"; fi)
142 # Use '-Os' optimization if available, else use -O2, allow Config to override
143 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
144 # Use the gcc 3.4 -funit-at-a-time optimization when available
145 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
147 GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
148 #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
150 ifeq ($(GCC_MAJOR_VER),4)
151 # shrinks code, results are from 4.0.2
153 OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
155 OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
157 OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
160 CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
161 CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
164 PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
165 PICFLAG := $(PICFLAG-y)
168 # Some nice CPU specific optimizations
169 ifeq ($(TARGET_ARCH),i386)
170 OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
171 OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
174 CPU_CFLAGS-$(CONFIG_386)+=-march=i386
175 CPU_CFLAGS-$(CONFIG_486)+=-march=i486
176 CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
177 CPU_CFLAGS-$(CONFIG_586)+=-march=i586
178 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
179 CPU_CFLAGS-$(CONFIG_686)+=-march=i686
180 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
181 CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
182 CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
183 CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
184 CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
185 CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
186 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
187 CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
188 CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
189 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
192 ifeq ($(TARGET_ARCH),sparc)
193 CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
194 CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
195 CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
196 CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
199 ifeq ($(TARGET_ARCH),arm)
200 OPTIMIZATION+=-fstrict-aliasing
201 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
202 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
203 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
204 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
205 CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
206 CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
207 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
208 CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
209 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
210 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
211 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
212 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
213 CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
214 CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
215 CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
216 CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
217 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
218 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
219 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
220 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
221 CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
222 CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
223 CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
226 ifeq ($(TARGET_ARCH),mips)
227 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
228 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
229 CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
230 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
231 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
232 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
233 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
234 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
235 ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
236 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
237 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
239 ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
240 CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
241 CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
243 CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
244 CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
245 CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
248 ifeq ($(TARGET_ARCH),nios)
249 CPU_LDFLAGS-y+=-Wl,-m32
250 CPU_CFLAGS-y+=-Wl,-m32
253 ifeq ($(TARGET_ARCH),sh)
254 OPTIMIZATION+=-fstrict-aliasing
255 OPTIMIZATION+= $(call check_gcc,-mprefergot,)
256 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
257 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
258 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
259 CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
260 CPU_CFLAGS-$(CONFIG_SH2)+=-m2
261 CPU_CFLAGS-$(CONFIG_SH3)+=-m3
262 ifeq ($(UCLIBC_HAS_FLOATS),y)
263 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
264 CPU_CFLAGS-$(CONFIG_SH4)+=-m4
266 CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
267 CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
271 ifeq ($(TARGET_ARCH),sh64)
272 OPTIMIZATION+=-fstrict-aliasing
273 CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-Wl,-EL
274 CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-Wl,-EB
275 CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
276 CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
277 CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
280 ifeq ($(TARGET_ARCH),h8300)
282 CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
283 CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
284 CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
285 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
288 ifeq ($(TARGET_ARCH),cris)
289 CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
290 CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
291 CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
296 ifeq ($(TARGET_ARCH),m68k)
297 # -fPIC is only supported for 68020 and above. It is not supported
298 # for 68000, 68010, or Coldfire.
303 ifeq ($(TARGET_ARCH),powerpc)
304 # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
305 # enough. Therefore use -fpic which will reduce code size and generates
309 PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
310 CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
311 CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES -D__NO_LONG_DOUBLE_MATH"
315 ifeq ($(TARGET_ARCH),bfin)
317 ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
318 CPU_CFLAGS-y:=-mfdpic
319 CPU_LDFLAGS-y += -Wl,-melf32bfinfd
323 ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
324 PICFLAG := -mleaf-id-shared-library
328 ifeq ($(TARGET_ARCH),frv)
329 CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
330 # Using -pie causes the program to have an interpreter, which is
331 # forbidden, so we must make do with -shared. Unfortunately,
332 # -shared by itself would get us global function descriptors
333 # and calls through PLTs, dynamic resolution of symbols, etc,
334 # which would break as well, but -Bsymbolic comes to the rescue.
335 export LDPIEFLAG:=-Wl,-shared -Wl,-Bsymbolic
339 ifeq ($(strip $(TARGET_ARCH)),avr32)
340 CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
341 CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
342 CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
345 ifeq ($(TARGET_ARCH),i960)
349 ifeq ($(TARGET_ARCH),microblaze)
353 ifeq ($(TARGET_ARCH),v850)
357 # Keep the check_gcc from being needlessly executed
359 ifneq ($(UCLIBC_BUILD_PIE),y)
362 export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
365 # We need to keep track of both the CC PIE flag (above) as
366 # well as the LD PIE flag (below) because we can't rely on
367 # gcc passing -pie if we used -fPIE
369 ifneq ($(UCLIBC_BUILD_PIE),y)
372 export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
376 # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
378 export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
381 # Add a bunch of extra pedantic annoyingly strict checks
382 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
383 ifeq ($(EXTRA_WARNINGS),y)
384 XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
385 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
386 XWARNINGS+=-Wnonnull -Wundef
387 # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
388 #XWARNINGS+=-Wdeclaration-after-statement
390 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
391 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
393 SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
394 ifeq ($(UCLIBC_BUILD_SSP),y)
395 SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
396 SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
397 SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
399 SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
402 NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
403 # Some nice CFLAGS to work with
404 CFLAGS := -include $(top_builddir)include/libc-symbols.h \
405 $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
406 -fno-builtin -nostdinc -I$(top_builddir)include -I. \
407 -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
409 ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
410 CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
414 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
415 # If -msoft-float isn't supported, we want an error anyway.
416 # Hmm... might need to revisit this for arm since it has 2 different
417 # soft float encodings.
418 ifneq ($(TARGET_ARCH),nios)
419 ifneq ($(TARGET_ARCH),nios2)
420 CFLAGS += -msoft-float
423 ifeq ($(TARGET_ARCH),arm)
424 # No longer needed with current toolchains, but leave it here for now.
425 # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
426 # LDADD_LIBFLOAT=-lfloat
430 # Please let us see private headers' parts
431 CFLAGS += -DUCLIBC_INTERNAL
433 # We need this to be checked within libc-symbols.h
434 ifneq ($(HAVE_SHARED),y)
438 CFLAGS += $(call check_gcc,-std=gnu99,)
440 LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -Wl,-shared \
441 -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc
442 # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
443 #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
445 ifeq ($(UCLIBC_BUILD_RELRO),y)
446 LDFLAGS_NOSTRIP+=-Wl,-z,relro
449 ifeq ($(UCLIBC_BUILD_NOW),y)
450 LDFLAGS_NOSTRIP+=-Wl,-z,now
453 ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
454 # Be sure that binutils support it
455 LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
456 ifeq ($(LDFLAGS_GNUHASH),)
457 $(error Your binutils don't support --hash-style option, while you want to use it)
459 LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
463 LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
468 CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
473 STRIPTOOL := true -Stripping_disabled
477 # we try to compile all sources at once into an object (IMA), but
478 # gcc-3.3.x does not support it
479 # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
480 # gcc-4.0.x supports it, supports the --combine flag, but does not need it
481 # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
482 ifeq ($(GCC_MAJOR_VER),3)
485 CFLAGS+=$(call check_gcc,--combine,)
491 ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
492 LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
495 ifeq ($(UCLIBC_HAS_THREADS),y)
496 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
499 ifeq ($(LINUXTHREADS_OLD),y)
500 PTNAME := linuxthreads.old
502 PTNAME := linuxthreads
505 PTDIR := $(top_builddir)libpthread/$(PTNAME)
506 # set up system dependencies include dirs (NOTE: order matters!)
507 ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
509 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
510 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
511 -I$(PTDIR)/sysdeps/unix/sysv/linux \
512 -I$(PTDIR)/sysdeps/pthread \
513 -I$(PTDIR)/sysdeps/pthread/bits \
514 -I$(PTDIR)/sysdeps/generic \
515 -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
516 -I$(top_srcdir)ldso/include
518 # Test for TLS if NPTL support was selected.
520 GCC_HAS_TLS=$(shell \
521 echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
522 ifneq ($(GCC_HAS_TLS),)
525 @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
526 @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
527 @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
528 @echo "#### about this problem.";
530 @echo "#### Exiting...";
536 -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
537 -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
538 -I$(PTDIR)/sysdeps/unix/sysv/linux \
539 -I$(PTDIR)/sysdeps/pthread \
541 -I$(top_builddir)libpthread
548 CFLAGS += -I$(KERNEL_HEADERS)
550 CFLAGS += -iwithprefix include-fixed -iwithprefix include
552 ifneq ($(DOASSERTS),y)
556 ifeq ($(SYMBOL_PREFIX),_)
557 CFLAGS+=-D__UCLIBC_UNDERSCORES__
560 # Keep the check_as from being needlessly executed
561 ifndef ASFLAGS_NOEXEC
562 ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
563 export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
565 export ASFLAGS_NOEXEC :=
568 ASFLAGS = $(ASFLAGS_NOEXEC)
570 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
571 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
572 LIBGCC_DIR:=$(dir $(LIBGCC))
574 # moved from libpthread/linuxthreads
575 ifeq ($(UCLIBC_CTOR_DTOR),y)
576 SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
577 SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o