Linking error: "relocation R_X86_64_32 ... can not be used when making a shared object; recompile with -fPIC"

Question

我正在尝试编译 Tox（特别是 toxcore）。当我尝试编译它时，遇到以下错误：

>make
make  all-recursive
make[1]: Entering directory '/root/Tox/toxcore'
Making all in build
make[2]: Entering directory '/root/Tox/toxcore/build'
  CCLD     libtoxav.la
/usr/bin/ld: /usr/local/lib/libvpx.a(vpx_codec.c.o): relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC
/usr/local/lib/libvpx.a: error adding symbols: Bad value
collect2: error: ld returned 1 exit status
Makefile:1385: recipe for target 'libtoxav.la' failed
make[2]: *** [libtoxav.la] Error 1
make[2]: Leaving directory '/root/Tox/toxcore/build'
Makefile:506: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/root/Tox/toxcore'
Makefile:410: recipe for target 'all' failed
make: *** [all] Error 2

根据错误消息，我尝试通过导出 C++ 标志 (export CXXFLAGS="$CXXFLAGS -fPIC")、向 configure (./configure --enable-shared) 添加参数来使用 fPIC，并且通过编辑 Makefile（将 CC = gcc 更改为 CC = gcc -fPIC），但这些尝试都没有奏效，我仍然遇到同样的错误。可能出了什么问题？

这是我现在的方法（Ubuntu）：

sudo apt-get install pkg-config
sudo apt-get install build-essential
sudo apt-get install libtool
sudo apt-get install autotools-dev
sudo apt-get install automake
sudo apt-get install checkinstall
sudo apt-get install check
sudo apt-get install git
sudo apt-get install yasm

cd ~
mkdir Tox
cd Tox

git clone https://github.com/jedisct1/libsodium.git
cd libsodium
git checkout tags/1.0.3
./autogen.sh
./configure && make check
sudo checkinstall --install --pkgname libsodium --pkgversion 1.0.0 --nodoc
sudo ldconfig
cd ..

git clone https://chromium.googlesource.com/webm/libvpx
cd libvpx
git checkout tags/v1.3.0
./configure
make
make install
cd ..

git clone https://github.com/irungentoo/toxcore.git
cd toxcore
autoreconf -i
./configure
make
sudo make install
cd ..

Answer 1

一定是配置脚本有bug，不应该是libvpx.a.

但不用担心，因为 Ubuntu 为 libvpx-dev 和 libsodium-dev 提供了包，并且使用它们似乎工作得很好，所以你应该这样做，除非有一些有充分的理由不这样做。

此外，除非你需要经典toxcore，否则c-toxcore似乎是继任者，所以你可能应该改用它。

Answer 2

配置 --enable-pic 将添加必要的 -fPIC 选项，对我有用。

Linking error: "relocation R_X86_64_32 ... can not be used when making a shared object; recompile with -fPIC"

Linking error: "relocation R_X86_64_32 ... can not be used when making a shared object; recompile with -fPIC"

c++

gcc

tox

fpic