重定位R_X86_64_32S针对`.rodata'...在64位平台上编译时 [英] Relocation R_X86_64_32S against `.rodata' ... While compiling on 64-bit platform

问题描述

所以我一直在编码的东西在32位，昨天我需要建立一个DLL，我有一些问题。无论如何我解决了他们在这里。 p>

不幸的是，即使我认为一切都工作后，我发现是不是这样，当我移动我的程序和makefile在其他计算机上运行在64位，因为你可以猜猜发生了什么...

所以我的问题是与64位的重定位有关

 code> / usr / bin / ld：MyClass.o：重定位R_X86_64_32S对`.rodata'不能在创建共享对象时使用;使用-fPIC重新编译
 MyClass.o：无法读取符号：错误值
  

是我的makefile

  MyProgram：main.o chkopts 
  -  $ {CLINKER} -o $ @ $& $ {MYLIB} $ {PETSC_MAT_LIB} 
 $ {RM} main.o 
 
 export LD_LIBRARY_PATH = $ {LIBADD}：$ LD_LIBRARY_PATH 
 
 LibMyProgram.so：MyClass .o chkopts 
  -  $ {CLINKER} -shared -Wl，-soname，$ {SONAME} -o $ {VERS} * .o $ {PETSC_MAT_LIB} 
 
 mv $ {VERS} $ {LIBADD} 
 ln -sf $ {LIBADD} $ {VERS} $ {LIBADD} $ {SOWOV} 
 ln -sf $ {LIBADD} $ {VERS} $ {LIBADD} $ {SONAME} 
  

我试图在CFLAGS，CPPFLAGS甚至LDFLAGS中添加-fPIC。我也尝试在-shared标志之前和之后添加-fPIC。

   -  $ {CLINKER} -shared -fPIC -Wl ，-soname，$ {SONAME} -o $ {VERS} * .o $ {PETSC_MAT_LIB} 
  

如果我使用CFLAGS = -fPIC，我会得到一个类似的错误：

  ... / petsc / petsc-3.2-p6 / arch-linux2-cxx-debug / lib / libpetsc.a（err.o ）：在创建共享对象时不能使用针对`ompi_mpi_comm_self'的重定位R_X86_64_32;使用-fPIC重新编译。 
  

我已经阅读过所有主题，甚至与我的问题相似，无法解决这个问题。

解决方案

解决方案是使用 -fPIC ，并链接共享对象与 -shared 。

添加 -fPIC 到 CFLAGS 或 CXXFLAGS

So I've been coding something on 32-bit and yesterday I needed to build a dll and I had a couple of problems with that. Anyway I solved them here.

Unfortunately even if I thought that everything was working after all I found that wasn't the case when I moved my program and makefile on other computer what runs on 64bit, as you can guess what happened...

So my problem is related to relocation because of 64bit

/usr/bin/ld: MyClass.o: relocation R_X86_64_32S against `.rodata' can not be used when making a shared object; recompile with -fPIC
MyClass.o: could not read symbols: Bad value

and here is my makefile

MyProgram: main.o chkopts
    -${CLINKER} -o $@ $< ${MYLIB} ${PETSC_MAT_LIB}
    ${RM} main.o

    export LD_LIBRARY_PATH=${LIBADD}:$LD_LIBRARY_PATH

LibMyProgram.so: MyClass.o  chkopts
    -${CLINKER}  -shared -Wl,-soname,${SONAME} -o ${VERS}   *.o  ${PETSC_MAT_LIB}

    mv ${VERS} ${LIBADD}
    ln -sf ${LIBADD}${VERS} ${LIBADD}${SOWOV}
    ln -sf ${LIBADD}${VERS} ${LIBADD}${SONAME}

I've tried to add -fPIC in CFLAGS, CPPFLAGS and even LDFLAGS. I've also tried add -fPIC before and after -shared flag.

-${CLINKER} -shared -fPIC -Wl,-soname,${SONAME} -o ${VERS}   *.o  ${PETSC_MAT_LIB}

But I'll just get a same error as previously.

If I use CFLAGS = -fPIC I'll get a bit same kind of error which is:

.../petsc/petsc-3.2-p6/arch-linux2-cxx-debug/lib/libpetsc.a(err.o): relocation R_X86_64_32 against `ompi_mpi_comm_self' can not be used when making a shared object; recompile with -fPIC.

I've read about all the topics what are even remotely similar with my problem but I've been unable to figure this out.

解决方案

The solution was to compile everything with -fPIC, and link shared objects with -shared.

Add -fPIC to CFLAGS or CXXFLAGS for make-based projects.

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