针对“.rodata"重定位 R_X86_64_32S ... 在 64 位平台上编译时

问题描述

所以我一直在 32 位上编码一些东西，昨天我需要构建一个 dll，我遇到了一些问题.无论如何，我在这里解决了它们.>

不幸的是，即使我认为一切都正常工作，但我发现当我将我的程序和 makefile 移到其他运行在 64 位计算机上的计算机时，情况并非如此，因为您可以猜到发生了什么......

所以我的问题与 64 位的重定位有关

/usr/bin/ld: MyClass.o: relocation R_X86_64_32S针对`.rodata'不能在制作共享对象时使用；用 -fPIC 重新编译MyClass.o:无法读取符号:错误值

这是我的makefile

我的程序:main.o chkopts-${CLINKER} -o $@ $<${MYLIB} ${PETSC_MAT_LIB}${RM} main.o导出 LD_LIBRARY_PATH=${LIBADD}:$LD_LIBRARY_PATHLibMyProgram.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}

我尝试在 CFLAGS、CPPFLAGS 甚至 LDFLAGS 中添加 -fPIC.我也试过在 -shared 标志前后添加 -fPIC.

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

但我会得到和以前一样的错误.

如果我使用 CFLAGS = -fPIC 我会得到一些类似的错误:

.../petsc/petsc-3.2-p6/arch-linux2-cxx-debug/lib/libpetsc.a(err.o): relocation R_X86_64_32 针对 `ompi_mpi_comm_self'共享对象；用 -fPIC 重新编译.

我已经阅读了所有与我的问题非常相似的主题，但我一直无法弄清楚这一点.

解决方案

解决方案是使用 -fPIC 编译所有内容，并使用 -shared 链接共享对象.

将 -fPIC 添加到基于 make 的项目的 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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