I posted this question in SO, and was suggested to post here for more help:
----------------------
I tried to link an existing C++ library to go code. The C++ library only
has a static library and a header file, no source code.
I used swigc to generate a libfoo.go and I wrote a simple libb.go to build
this library. This worked well on ubuntu 16.04 with gcc-6 earlier.
However, once I upgraded to ubuntu 18, and even with older go1.9 and gcc-6,
which used to work, I am hitting the following error:
/usr/bin/ld: ./lib/libfoo.a(parser.o): relocation R_X86_64_32S against symbol
`xmlSAX2IgnorableWhitespace' can not be used when making a PIE object;
recompile with -fPIC
/usr/bin/ld: ./lib/libfoo.a(tree.o): relocation R_X86_64_32 against
`.rodata.str1.1' can not be used when making a PIE object; recompile with -fPIC
I have downgraded both go compiler and gcc to the version that used to work.
The following is the libb.go that used to work
/*
#cgo CXXFLAGS: -std=c++11 -D_GLIBCXX_USE_CXX11_ABI=0 -w
#cgo CFLAGS: -I${SRCDIR}/include -w
#cgo LDFLAGS: -Wl -rpath,./lib, -L${SRCDIR}/lib -l:libfoo.a -l:libxml2.a
*/import "C"
What should I do get this fixed? I searched and it seems that I have to
recompile that static library, which is mission impossible in my case. I
tried to pass the -no-pie parameter to LDFLAGS, that didn't work either.
Thanks!
----------------------
1, first thing first, I don't have the c++ source code, so I can't
recompile it.
2, I am using ubuntu 18, initially, I believe I install go via "apt-get
install", but later I uninstall that version using "apt-get remove" , and
then downloaded go1.9 pkg from official website and install directly.
3, go env gives:
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/coolart/work/go"
GORACE=""
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0
-fdebug-prefix-map=/tmp/go-build628698308=/tmp/go-build
-gno-record-gcc-switches"
CXX="g++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
4, some system information
go version go1.9.7 linux/amd64
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.2 LTS
Release: 18.04
Codename: bionic
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
5.5.0-12ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin
--enable-default-pie --with-system-zlib --enable-objc-gc --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 5.5.0 20171010 (Ubuntu 5.5.0-12ubuntu1)
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
5.5.0-12ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin
--enable-default-pie --with-system-zlib --enable-objc-gc --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 5.5.0 20171010 (Ubuntu 5.5.0-12ubuntu1)
--
You received this message because you are subscribed to the Google Groups
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to golang-nuts+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/golang-nuts/9d2d1b5b-ba0c-45a9-a950-482dd661c35c%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
