Failed to build gdb on host side

Hi,

I have a problem when I enabled gdb compilation on host side:

----
/bin/bash ./libtool --tag=CC --mode=link
/home/avd/wksp/dev/output/host/usr/bin/ccache /usr/bin/gcc -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow -O2 -I/home/avd/wksp/dev/output/host/usr/include -release `cat
libtool-soversion` -static-libstdc++ -static-libgcc -L/home/avd/wksp/dev/output/host/lib
-L/home/avd/wksp/dev/output/host/usr/lib -Wl,-rpath,/home/avd/wksp/dev/output/host/usr/lib -o libbfd.la -rpath /home/avd/wksp/dev/output/host/usr/x86_64-unknown-linux-gnu/arm-buildroot-linux-uclibcgnueabi/lib archive.lo archures.lo bfd.lo bfdio.lo bfdwin.lo cache.lo coff-bfd.lo
compress.lo corefile.lo format.lo hash.lo init.lo libbfd.lo linker.lo
merge.lo opncls.lo reloc.lo section.lo simple.lo stab-syms.lo stabs.lo
syms.lo targets.lo binary.lo ihex.lo srec.lo tekhex.lo verilog.lo `cat
ofiles`
-L/home/avd/wksp/dev/output/build/host-gdb-7.9/bfd/../libiberty/pic
-liberty -Wl,-lc,--as-needed,-lm,--no-as-needed -ldl -lz -ldl
libtool: link: /home/avd/wksp/dev/output/host/usr/bin/ccache
/usr/bin/gcc -shared -fPIC -DPIC .libs/archive.o .libs/archures.o
.libs/bfd.o .libs/bfdio.o .libs/bfdwin.o .libs/cache.o .libs/coff-bfd.o .libs/compress.o .libs/corefile.o .libs/format.o .libs/hash.o
.libs/init.o .libs/libbfd.o .libs/linker.o .libs/merge.o .libs/opncls.o .libs/reloc.o .libs/section.o .libs/simple.o .libs/stab-syms.o
.libs/stabs.o .libs/syms.o .libs/targets.o .libs/binary.o .libs/ihex.o .libs/srec.o .libs/tekhex.o .libs/verilog.o .libs/elf32-arm.o
.libs/elf32.o .libs/elf-nacl.o .libs/elf-vxworks.o .libs/elf.o
.libs/elflink.o .libs/elf-attrs.o .libs/elf-strtab.o
.libs/elf-eh-frame.o .libs/dwarf1.o .libs/dwarf2.o .libs/elf32-gen.o .libs/plugin.o .libs/cpu-arm.o .libs/cpu-plugin.o .libs/archive64.o -L/home/avd/wksp/dev/output/host/lib
-L/home/avd/wksp/dev/output/host/usr/lib -L/home/avd/wksp/dev/output/build/host-gdb-7.9/bfd/../libiberty/pic
-liberty -lz -ldl -Wl,-rpath -Wl,/home/avd/wksp/dev/output/host/usr/lib
-Wl,-lc -Wl,--as-needed -Wl,-lm -Wl,--no-as-needed -Wl,-soname
-Wl,libbfd-2.25.51.so -o .libs/libbfd-2.25.51.so
/usr/bin/ld:
/home/avd/wksp/dev/output/host/usr/lib/libiberty.a(cplus-dem.o):
relocation R_X86_64_32S against `_sch_istable' can not be used when
making a shared object; recompile with -fPIC /home/avd/wksp/dev/output/host/usr/lib/libiberty.a: error adding
symbols: Bad value
collect2: error: ld returned 1 exit status
Makefile:1240: recipe for target 'libbfd.la' failed
make[5]: *** [libbfd.la] Error 1
make[5]: Leaving directory
'/home/avd/wksp/dev/output/build/host-gdb-7.9/bfd'
Makefile:1655: recipe for target 'all-recursive' failed
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory
'/home/avd/wksp/dev/output/build/host-gdb-7.9/bfd'
Makefile:1137: recipe for target 'all' failed
make[3]: *** [all] Error 2
make[3]: Leaving directory
'/home/avd/wksp/dev/output/build/host-gdb-7.9/bfd'
Makefile:2603: recipe for target 'all-bfd' failed
make[2]: *** [all-bfd] Error 2
make[2]: Leaving directory '/home/avd/wksp/dev/output/build/host-gdb-7.9' Makefile:837: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/home/avd/wksp/dev/output/build/host-gdb-7.9' package/pkg-generic.mk:156: recipe for target '/home/avd/wksp/dev/output/build/host-gdb-7.9/.stamp_built' failed
make: *** [/home/avd/wksp/dev/output/build/host-gdb-7.9/.stamp_built]
Error 2
----

To fix the issue, I had to copy manually the libiberty.a file from pic/ directory to the host target directory:

----
cp output/build/host-gcc-final-4.7.4/build/libiberty/pic/libiberty.a output/host/usr/lib/libiberty.a
----

I use buildroot 2015.5 and I have a amd64 arch.

Maybe a patch in gcc package to copy libiberty.a from pic is needed for x86_64 arch like me. What do you think about that ?

Regards,
Anthony.

This is where libiberty should be found...

... but instead, it is found in host/usr/lib.

That's pretty bad, libiberty should not be installed in the host dir. I also
can't find any code that does that (nothing passes --enable-install-libiberty except the target binutils).

So can you trace back which step of the build installed libiberty in the host
dir? Perhaps share your defconfig?

Regards,
Arnout

[snip]

Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF

Hi Arnout and all,

If I look over the output directory about libiberty.a, here what I find:

----------------
[avd:~/wksp/dev] $ for f in $(find output/ -name "libiberty.a"); do
md5sum $f; done
5c79d008976401db98e014f8b4cf74aa output/build/host-gcc-final-4.7.4/build/build-x86_64-unknown-linux-gnu/libiberty/libiberty.a 1139e997c007ab5187665e98c23659f6 output/build/host-gcc-final-4.7.4/build/libiberty/libiberty.a fc9ca886f8c6e8d1cbc3293a496ac179 output/build/host-gcc-final-4.7.4/build/libiberty/pic/libiberty.a 626fcb7a10b75bad14a14886c111e3b4 output/build/host-gcc-initial-4.7.4/build/build-x86_64-unknown-linux-gnu/libiberty/libiberty.a 480750b2bf20cb389ba84d875667c8e0 output/build/host-gcc-initial-4.7.4/build/libiberty/libiberty.a 4903b2aaa94fed7579685aa6789778f2 output/build/host-gcc-initial-4.7.4/build/libiberty/pic/libiberty.a c1303d7bbcf87fb95eb18a604ef1bbc2 output/build/gdb-7.9/gdb/gdbserver/build-libiberty-gdbserver/libiberty.a a86309dd08155fc1b664f7c066402513 output/build/gdb-7.9/gdb/gdbserver/build-libiberty-gdbserver/pic/libiberty.a 09901aa03336b1ef814b866c1a532015 output/build/host-binutils-2.24/libiberty/libiberty.a d228daa645bb5d167ee9d86c2756fa75 output/build/host-gdb-7.9/libiberty/libiberty.a 70b7d21a71b8f79322ca71b3df0e98cf output/build/host-gdb-7.9/libiberty/pic/libiberty.a 96e90ee6aeffcfb418ea31eb9c7ce802 output/host/usr/lib/libiberty.a
----------------

----------------
[avd:~/wksp/dev] $ for f in $(find output/ -name "libiberty.a"); do ls
-l $f; done
-rw-r--r-- 1 avd 401332 Jul 6 16:18 output/build/host-gcc-final-4.7.4/build/build-x86_64-unknown-linux-gnu/libiberty/libiberty.a -rw-r--r-- 1 avd 401332 Jul 6 16:18 output/build/host-gcc-final-4.7.4/build/libiberty/libiberty.a
-rw-r--r-- 1 avd 405500 Jul 6 16:18 output/build/host-gcc-final-4.7.4/build/libiberty/pic/libiberty.a
-rw-r--r-- 1 avd 401332 Jul 6 16:16 output/build/host-gcc-initial-4.7.4/build/build-x86_64-unknown-linux-gnu/libiberty/libiberty.a -rw-r--r-- 1 avd 401332 Jul 6 16:16 output/build/host-gcc-initial-4.7.4/build/libiberty/libiberty.a
-rw-r--r-- 1 avd 405500 Jul 6 16:16 output/build/host-gcc-initial-4.7.4/build/libiberty/pic/libiberty.a
-rw-r--r-- 1 avd 982840 Jul 6 16:31 output/build/gdb-7.9/gdb/gdbserver/build-libiberty-gdbserver/libiberty.a -rw-r--r-- 1 avd 1003652 Jul 6 16:31 output/build/gdb-7.9/gdb/gdbserver/build-libiberty-gdbserver/pic/libiberty.a -rw-r--r-- 1 avd 447600 Jul 6 16:14 output/build/host-binutils-2.24/libiberty/libiberty.a
-rw-r--r-- 1 avd 483720 Jul 6 16:31 output/build/host-gdb-7.9/libiberty/libiberty.a
-rw-r--r-- 1 avd 521136 Jul 6 16:31 output/build/host-gdb-7.9/libiberty/pic/libiberty.a
-rw-r--r-- 1 avd 401332 Jul 6 16:20 output/host/usr/lib/libiberty.a
----------------

The file libiberty.a seems to come from the gcc-final package but it doesn't have the same md5 hash. I think gcc doesn't make a simple copy but modify the installed ar archive ?

Near the end of the build of gcc-final, I can see this:

----------------
make[3]: Leaving directory '/home/avd/wksp/dev/output/build/host-gcc-final-4.7.4/build/libdecnumber' make[3]: Entering directory '/home/avd/wksp/dev/output/build/host-gcc-final-4.7.4/build/libiberty' make[4]: Entering directory '/home/avd/wksp/dev/output/build/host-gcc-final-4.7.4/build/libiberty/testsuite' make[4]: Nothing to be done for 'all'.
make[4]: Leaving directory '/home/avd/wksp/dev/output/build/host-gcc-final-4.7.4/build/libiberty/testsuite' make[4]: Entering directory '/home/avd/wksp/dev/output/build/host-gcc-final-4.7.4/build/libiberty/testsuite' make[4]: Nothing to be done for 'install'.
make[4]: Leaving directory '/home/avd/wksp/dev/output/build/host-gcc-final-4.7.4/build/libiberty/testsuite' /bin/bash ../../libiberty/../mkinstalldirs /home/avd/wksp/dev/output/host/usr/lib//home/avd/wksp/dev/output/host/usr/bin/ccache /usr/bin/gcc -O2 -I/home/avd/wksp/dev/output/host/usr/include -print-multi-os-directory
/usr/bin/install -c -m 644 ./libiberty.a /home/avd/wksp/dev/output/host/usr/lib//home/avd/wksp/dev/output/host/usr/bin/ccache /usr/bin/gcc -O2 -I/home/avd/wksp/dev/output/host/usr/include -print-multi-os-directory/./libiberty.an
( cd /home/avd/wksp/dev/output/host/usr/lib//home/avd/wksp/dev/output/host/usr/bin/ccache /usr/bin/gcc -O2 -I/home/avd/wksp/dev/output/host/usr/include -print-multi-os-directory ; chmod 644 ./libiberty.an ;/usr/bin/ranlib ./libiberty.an )
mv -f /home/avd/wksp/dev/output/host/usr/lib//home/avd/wksp/dev/output/host/usr/bin/ccache /usr/bin/gcc -O2 -I/home/avd/wksp/dev/output/host/usr/include -print-multi-os-directory/./libiberty.an /home/avd/wksp/dev/output/host/usr/lib/`/home/avd/wksp/dev/output/host/usr/bin/ccache /usr/bin/gcc -O2 -I/home/avd/wk\
sp/dev/output/host/usr/include
-print-multi-os-directory`/./libiberty.a
----------------

I can see in my build log there is binutils which can install the lib
but the install command is surrounded with "if test -n ""; then \" so
nothing is done.

The openwrt guys did a patch in gcc/final package:
https://dev.openwrt.org/changeset/42625

I use gcc 4.7.4.

I pasted my config and the build log here:

http://dropcanvas.com/k1YRbqW9GW9bMLthese links:

Regards,
Anthony.

[snip]

Right, seems that gcc 4.7.4 installs it but later versions don't do that anymore.

Simplest workaround is to remove libiberty.a from HOST_DIR after the build. I'm
not sure if it's still worth it to do this in buildroot itself.

Regards,
Arnout

[snip]

Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF