Re: ports head -r487783: on armv7 x11/pixman fails to build: /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC

[Tracking down -O2 vs. -O lead to share/mk/sys.mk instead of
to my materials. It in turn leads back to poudriere-devel with
qemu-user-static in use defining MACHINE_ARCH but without it
instead not doing so. share/mk/sys.mk behaves differently
for with vs. without the definition, leading to -O2 vs -O
differences in the two build contexts. Details later below.]

On 2018-Nov-14, at 13:05, Mark Millard <marklmi at yahoo.com> wrote:

> [Added: The original cross-build via poudriere-devel and qemu-user-static
> did not get this problem. I give details later. Sumamry: Looks like -O2
> was used for the cross build and -O was used for armv7 native. The
> difference is likely(?) from my materials but not supporting both ways of
> building is likely a problem with the port(?).]
> 
> On 2018-Nov-14, at 10:10, Mark Millard <marklmi at yahoo.com> wrote:
> 
>> I'll first note:
>> 
>> # /usr/bin/ld -v
>> LLD 6.0.1 (FreeBSD 335540-1300000) (compatible with GNU linkers)
>> 
>> and that I use:
>> 
>> CFLAGS.clang+= -mcpu=cortex-a7
>> CXXFLAGS.clang+= -mcpu=cortex-a7
>> CPPFLAGS.clang+= -mcpu=cortex-a7
>> 
>> in the src.conf like ~/src.configs/src.conf.armv7-clang-bootstrap.armv7-host
>> file that I used.
>> 
>> The error reports were:
>> 
>> --- libpixman-1.la ---
>> /bin/sh ../libtool  --tag=CC    --mode=link cc   -O -pipe -mcpu=cortex-a7  -g -fno-strict-aliasing  -Wall -Wdeclaration-after-statement -Wno-unused-local-typedefs -fno-strict-aliasing -fvisibility=hid
>> den -version-info 34:0:34  -no-undefined   -pthread       -o  libpixman-1.la -rpath /usr/local/lib pixman.lo pixman-access.lo pixman-access-accessors.lo  pixman-bits-image.lo pixman-combine32.lo  pixm
>> an-combine-float.lo pixman-conical-gradient.lo  pixman-filter.lo pixman-x86.lo pixman-mips.lo pixman-arm.lo  pixman-ppc.lo pixman-edge.lo pixman-edge-accessors.lo  pixman-fast-path.lo pixman-glyph.lo 
>> pixman-general.lo  pixman-gradient-walker.lo pixman-image.lo  pixman-implementation.lo pixman-linear-gradient.lo  pixman-matrix.lo pixman-noop.lo pixman-radial-gradient.lo  pixman-region16.lo pixman-r
>> egion32.lo pixman-solid-fill.lo  pixman-timer.lo pixman-trap.lo pixman-utils.lo  -lm   -lm       libpixman-arm-simd.la libpixman-arm-neon.la     -lm
>> libtool: link: cc -shared  -fPIC -DPIC  .libs/pixman.o .libs/pixman-access.o .libs/pixman-access-accessors.o .libs/pixman-bits-image.o .libs/pixman-combine32.o .libs/pixman-combine-float.o .libs/pixma
>> n-conical-gradient.o .libs/pixman-filter.o .libs/pixman-x86.o .libs/pixman-mips.o .libs/pixman-arm.o .libs/pixman-ppc.o .libs/pixman-edge.o .libs/pixman-edge-accessors.o .libs/pixman-fast-path.o .libs
>> /pixman-glyph.o .libs/pixman-general.o .libs/pixman-gradient-walker.o .libs/pixman-image.o .libs/pixman-implementation.o .libs/pixman-linear-gradient.o .libs/pixman-matrix.o .libs/pixman-noop.o .libs/
>> pixman-radial-gradient.o .libs/pixman-region16.o .libs/pixman-region32.o .libs/pixman-solid-fill.o .libs/pixman-timer.o .libs/pixman-trap.o .libs/pixman-utils.o  -Wl,--whole-archive ./.libs/libpixman-
>> arm-simd.a ./.libs/libpixman-arm-neon.a -Wl,--no-whole-archive  -lm  -O -mcpu=cortex-a7 -g -pthread   -pthread -Wl,-soname -Wl,libpixman-1.so.0 -o .libs/libpixman-1.so.0.34.0
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-simd.a(pixman-arm-simd-asm-scaled.o)
>>>>> referenced by pixman-arm-simd-asm-scaled.o:(.text+0x1B8) in archive ./.libs/libpixman-arm-simd.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-simd.a(pixman-arm-simd-asm-scaled.o)
>>>>> referenced by pixman-arm-simd-asm-scaled.o:(.text+0x374) in archive ./.libs/libpixman-arm-simd.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x17AC) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x1814) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x1A38) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x1AFC) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x21C8) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x2294) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x84E0) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x85C4) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x9720) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x9834) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0xA7B0) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0xA8CC) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x105A0) in archive ./.libs/libpixman-arm-neon.a
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x10DB8) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x11274) in archive ./.libs/libpixman-arm-neon.a
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm.o)
>>>>> referenced by pixman-arm-neon-asm.o:(.text+0x11808) in archive ./.libs/libpixman-arm-neon.a
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm-bilinear.o)
>>>>> referenced by pixman-arm-neon-asm-bilinear.o:(.text+0x4F0) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: can't create dynamic relocation R_ARM_V4BX against local symbol in readonly segment; recompile object files with -fPIC
>>>>> defined in ./.libs/libpixman-arm-neon.a(pixman-arm-neon-asm-bilinear.o)
>>>>> referenced by pixman-arm-neon-asm-bilinear.o:(.text+0xABC) in archive ./.libs/libpixman-arm-neon.a
>> 
>> /usr/bin/ld: error: too many errors emitted, stopping now (use -error-limit=0 to see all errors)
>> cc: error: linker command failed with exit code 1 (use -v to see invocation)
>> *** [libpixman-1.la] Error code 1
>> 
>> make[3]: stopped in /wrkdirs/usr/ports/x11/pixman/work/pixman-0.34.0/pixman
>> 1 error
>> 
>> make[3]: stopped in /wrkdirs/usr/ports/x11/pixman/work/pixman-0.34.0/pixman
>> *** [all-recursive] Error code 1
>> 
>> 
>> FreeBSD context details:
>> 
>> # uname -apKU
>> FreeBSD OPiP2E 13.0-CURRENT FreeBSD 13.0-CURRENT #5 r340287M: Sat Nov 10 22:40:25 PST 2018     markmi@FBSDFSSD:/usr/obj/armv7_clang/arm.armv7/usr/src/arm.armv7/sys/GENERIC-NODBG  arm armv7 1300003 1300003
> 
> 
> I went back and looked at the amd64 -> armv7 cross-build
> ( that used teh poudriere-built /nxb-bin/usr/bin/ ) and it
> did not complain:
> 
> --- libpixman-1.la ---
> /bin/sh ../libtool  --tag=CC    --mode=link /nxb-bin/usr/bin/cc   -O2 -pipe -mcpu=cortex-a7  -g -fno-strict-aliasing  -Wall -Wdeclaration-after-statement -Wno-unused-local-typedefs -fno-strict-aliasing -fvisibility=hidden -version-info 34:0:34  -no-undefined  -Wl,--no-threads  -pthread      -Wl,--no-threads -o  libpixman-1.la -rpath /usr/local/lib pixman.lo pixman-access.lo pixman-access-accessors.lo  pixman-bits-image.lo pixman-combine32.lo  pixman-combine-float.lo pixman-conical-gradient.lo  pixman-filter.lo pixman-x86.lo pixman-mips.lo pixman-arm.lo  pixman-ppc.lo pixman-edge.lo pixman-edge-accessors.lo  pixman-fast-path.lo pixman-glyph.lo pixman-general.lo  pixman-gradient-walker.lo pixman-image.lo  pixman-implementation.lo pixman-linear-gradient.lo  pixman-matrix.lo pixman-noop.lo p
 ixman-radial-gradient.lo  pixman-region16.lo pixman-region32.lo pixman-solid-fill.lo  pixman-timer.lo pixman-trap.lo pixman-utils.lo  -lm   -lm       libpixman-arm-simd.la libpixman-arm-neon.la     
 -lm
> libtool: link: /nxb-bin/usr/bin/cc -shared  -fPIC -DPIC  .libs/pixman.o .libs/pixman-access.o .libs/pixman-access-accessors.o .libs/pixman-bits-image.o .libs/pixman-combine32.o .libs/pixman-combine-float.o .libs/pixman-conical-gradient.o .libs/pixman-filter.o .libs/pixman-x86.o .libs/pixman-mips.o .libs/pixman-arm.o .libs/pixman-ppc.o .libs/pixman-edge.o .libs/pixman-edge-accessors.o .libs/pixman-fast-path.o .libs/pixman-glyph.o .libs/pixman-general.o .libs/pixman-gradient-walker.o .libs/pixman-image.o .libs/pixman-implementation.o .libs/pixman-linear-gradient.o .libs/pixman-matrix.o .libs/pixman-noop.o .libs/pixman-radial-gradient.o .libs/pixman-region16.o .libs/pixman-region32.o .libs/pixman-solid-fill.o .libs/pixman-timer.o .libs/pixman-trap.o .libs/pixman-utils.o  -Wl,--whole-archive
  ./.libs/libpixman-arm-simd.a ./.libs/libpixman-arm-neon.a -Wl,--no-whole-archive  -lm  -O2 -mcpu=cortex-a7 -g -Wl,--no-threads -pthread -Wl,--no-threads   -pthread -Wl,-soname -Wl,libpixman-1.so.0 
 -o .libs/libpixman-1.so.0.34.0
> libtool: link: (cd ".libs" && rm -f "libpixman-1.so.0" && ln -s "libpixman-1.so.0.34.0" "libpixman-1.so.0")
> libtool: link: (cd ".libs" && rm -f "libpixman-1.so" && ln -s "libpixman-1.so.0.34.0" "libpixman-1.so")
> libtool: link: (cd .libs/libpixman-1.lax/libpixman-arm-simd.a && ar x "/wrkdirs/usr/ports/x11/pixman/work/pixman-0.34.0/pixman/./.libs/libpixman-arm-simd.a")
> libtool: link: (cd .libs/libpixman-1.lax/libpixman-arm-neon.a && ar x "/wrkdirs/usr/ports/x11/pixman/work/pixman-0.34.0/pixman/./.libs/libpixman-arm-neon.a")
> libtool: link: ar cru .libs/libpixman-1.a  pixman.o pixman-access.o pixman-access-accessors.o pixman-bits-image.o pixman-combine32.o pixman-combine-float.o pixman-conical-gradient.o pixman-filter.o pixman-x86.o pixman-mips.o pixman-arm.o pixman-ppc.o pixman-edge.o pixman-edge-accessors.o pixman-fast-path.o pixman-glyph.o pixman-general.o pixman-gradient-walker.o pixman-image.o pixman-implementation.o pixman-linear-gradient.o pixman-matrix.o pixman-noop.o pixman-radial-gradient.o pixman-region16.o pixman-region32.o pixman-solid-fill.o pixman-timer.o pixman-trap.o pixman-utils.o  .libs/libpixman-1.lax/libpixman-arm-simd.a/pixman-arm-simd-asm-scaled.o .libs/libpixman-1.lax/libpixman-arm-simd.a/pixman-arm-simd-asm.o .libs/libpixman-1.lax/libpixman-arm-simd.a/pixman-arm-simd.o  .libs/libpixma
 n-1.lax/libpixman-arm-neon.a/pixman-arm-neon-asm-bilinear.o .libs/libpixman-1.lax/libpixman-arm-neon.a/pixman-arm-neon-asm.o .libs/libpixman-1.lax/libpixman-arm-neon.a/pixman-arm-neon.o 
> libtool: link: ranlib .libs/libpixman-1.a
> libtool: link: rm -fr .libs/libpixman-1.lax
> libtool: link: ( cd ".libs" && rm -f "libpixman-1.la" && ln -s "../libpixman-1.la" "libpixman-1.la" )
> ===========================================================================
> =======================<phase: run-depends    >============================
> ===========================================================================
> =======================<phase: stage          >============================
> . . .
> 
> 
> So I diff'd the logs and found the following (selective extraction):
> (- for amd64 -> armv7; + for armv7)
> 
> -Poudriere version: 3.2.99.20180601
> +Poudriere version: 3.2.99.20181024
> 
> This is was expected but may mean that I need to wait
> until the armv7 has 3.2.99.20181024 and I try via
> it.
> 
> -SHELL=/bin/csh
> -UNAME_p=armv7
> -UNAME_m=arm
> -ABI_FILE=/usr/lib/crt1.o
> +SHELL=/bin/sh
> 
> The SHELL's I expected but the other 3 lines I did not.
> But the 3 lines may only occur under qemu-user-static
> style use.
> 
> -QEMU_EMULATING=1
> 
> Expected.
> 
> In CONFIGURE_ENV:
> 
> amd64 -> armv7: CCASFLAGS having -O2
> armv7:          CCASFLAGS having -O
> 
> In MAKE_ENV:
> 
> amd64 -> armv7: CFLAGS having -O2
> armv7:          CFLAGS having -O
> 
> 
> (The -O2 vs. -O context differences may well be important
> to the behavior.)
> 
> (I'll not list /nxb-bin/. . . path use vs. not.)
> 
> Later:
> 
> -MACHINE=arm
> -MACHINE_ARCH=armv7
> -ARCH=${MACHINE_ARCH}
> 
> -.if ${LDFLAGS:M-fuse-ld=*lld*} || ${/usr/bin/ld:L:tA} == /usr/bin/ld.lld
> -LDFLAGS+=      -Wl,--no-threads
> -.endif
> 
> (That last was part of an experiment with avoiding a
> user-arm-static hangup.)
> 
> -_SMP_CPUS=28
> +_SMP_CPUS=4
> 
> I'll stop with that. It looks to me like -O2 vs. -O
> would be the likely distinction. While my materials
> probably caused that difference(?), the port likely
> should support both ways of building(?).


/usr/src/share/mk/sys.mk has:

.if !defined(%POSIX)
# 
# MACHINE_CPUARCH defines a collection of MACHINE_ARCH.  Machines with
# the same MACHINE_ARCH can run each other's binaries, so it necessarily
# has word size and endian swizzled in.  However, the source files for
# these machines often are shared amongst all combinations of size
# and/or endian.  This is called MACHINE_CPU in NetBSD, but that's used
# for something different in FreeBSD.
#
__TO_CPUARCH=C/mips(n32|64)?(el)?(hf)?/mips/:C/arm(v[67])?(eb)?/arm/:C/powerpc(64|spe)/powerpc/:C/riscv64(sf)?/riscv/
MACHINE_CPUARCH=${MACHINE_ARCH:${__TO_CPUARCH}}
.endif
. . .
.if ${MACHINE_CPUARCH} == "arm" || ${MACHINE_CPUARCH} == "mips"
CFLAGS          ?=      -O -pipe
.else
CFLAGS          ?=      -O2 -pipe
.endif
. . .

So with qemu-user-static involved MACHINE_ARCH was defined as armv7
and MACHINE_CPUARCH was too. (See the earlier "-MACHINE_ARCH=armv7"
line of the log differences.)

But without qemu-user-static involved MACHINE_ARCH was not defined
and MACHINE_CPUARCH was defined as just arm . (No "+" line to
match.)

Overall result: the two contexts differ for -O2 vs. -O use in CFLAGS.


===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)

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