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

所以我一直在编写 32 位代码，昨天我需要构建一个 dll，但我遇到了一些问题.无论如何，我在这里解决了它们.p>

不幸的是，即使我认为一切正常，但当我将程序和 makefile 移到其他运行 64 位的计算机上时发现情况并非如此，你可以猜到发生了什么......

所以我的问题与搬迁有关，因为 64 位

/usr/bin/ld: MyClass.o: relocation R_X86_64_32S against `.rodata' 在制作共享对象时不能使用；使用 -fPIC 重新编译MyClass.o:无法读取符号:值错误

这是我的makefile

MyProgram: 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}

但我会得到与以前相同的错误.

如果我使用 CFLAGS = -fPIC，我会遇到类似的错误:

.../petsc/petsc-3.2-p6/arch-linux2-cxx-debug/lib/libpetsc.a(err.o): 重定位 R_X86_64_32 对 `ompi_mpi_comm_self' 不能用于制作共享对象；使用 -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.

解决方案

解决方案是用-fPIC编译所有东西，用-shared链接共享对象.

为基于 make 的项目添加 -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.