Arch Linux

I am trying to compile a library (folly-git from AUR) that uses libiberty from GCC.

As far as I see at http://gcc.gnu.org/onlinedocs/libiberty/Using.html#Using libibery is not supposed to work as *.so, the projects should statically link against libibert.a

So I change folly-git PKGBUILD from --disable-shared to --enable-shared. I want to use liberty.a to link with my libfolly.so. It fails:

libtool: link: g++ -fPIC -DPIC -shared -nostdlib /usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../lib/crti.o /usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.0/crtbeginS.o .libs/Bits.o .libs/Conv.o .libs/Demangle.o .libs/CacheLocality.o .libs/dynamic.o .libs/EscapeTables.o .libs/File.o .libs/FileUtil.o .libs/Format.o .libs/FormatTables.o .libs/GroupVarint.o .libs/GroupVarintTables.o .libs/IOBuf.o .libs/IOBufQueue.o .libs/RecordIO.o .libs/AsyncTimeout.o .libs/EventBase.o .libs/EventHandler.o .libs/Request.o .libs/json.o .libs/MemoryIdler.o .libs/Malloc.o .libs/MemoryMapping.o .libs/Random.o .libs/Range.o .libs/SpookyHashV1.o .libs/SpookyHashV2.o .libs/Instantiations.o .libs/String.o .libs/Subprocess.o .libs/ThreadCachedArena.o .libs/TimeoutQueue.o .libs/Unicode.o .libs/Uri.o .libs/InlineExecutor.o .libs/ManualExecutor.o .libs/ThreadGate.o .libs/FunctionalExcept.o -L/usr/lib64 -lboost_thread -lboost_system -lboost_regex -lpthread -liberty -levent -ldouble-conversion -lgflags -lglog -L/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.0 -L/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../lib -L/lib/../lib -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../.. -lstdc++ -lm -lc -lgcc_s /usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.0/crtendS.o /usr/lib/gcc/x86_64-unknown-linux-gnu/4.9.0/../../../../lib/crtn.o -march=x86-64 -mtune=generic -O2 -Wl,-O1 -Wl,--sort-common -Wl,--as-needed -Wl,-z -Wl,relro -Wl,-soname -Wl,libfolly.so.0 -o .libs/libfolly.so.0.0.0
/usr/bin/ld: /usr/lib64/libiberty.a(cp-demangle.o): relocation R_X86_64_32S against `.rodata' can not be used when making a shared object; recompile with -fPIC
/usr/lib64/libiberty.a: error adding symbols: Bad value
collect2: error: ld returned 1 exit status
Makefile:669: recipe for target 'libfolly.la' failed
make[2]: *** [libfolly.la] Error 1
make[2]: *** Waiting for unfinished jobs....



It looks like libibery.a should be compiled with PIC to let it be linked into shared libraries.