从源代码在64位上构建32位GCC:链接问题 [英] Building 32 bit GCC from source on 64 bit: linking issue

问题描述

/usr/bin/ld: i386:x86-64 architecture of input file `build/gengenrtl.o' is incompatible with i386 output
/usr/bin/ld: i386:x86-64 architecture of input file `build/errors.o' is incompatible with i386 output
/usr/bin/ld: build/gengenrtl.o: file class ELFCLASS64 incompatible with ELFCLASS32
/usr/bin/ld: final link failed: File in wrong format
collect2: error: ld returned 1 exit status

如果问题是ld或给定的库，我不知道.

I don't get if the problem is ld or the given library.

我的配置是

 CC="gcc -m32" \
 CFLAGS="-m32" \
 LD="<path>/bin/32/binutils/2.23.2/bin/ld" \
 LDFLAGS="-m32" \
 ./configure \
 --build=i586-pc-linux-gnu \
 --host=i586-pc-linux-gnu \
 --target=i586-pc-linux-gnu \
 --enable-shared \
 --enable-static \
 --enable-languages=c,c++ \
 --enable-bootstrap \
 --prefix=<path>/bin/32/gcc/i586 \
 --disable-stage1-checking \ 
 --with-gmp=<path>/lib/32/gmp/5.1.2 \
 --with-mpfr=<path>/lib/32/mpfr/3.1.2 \
 --with-mpc=<path>/lib/32/mpc/1.0.1 \
 --with-cloog=<path>/lib/32/cloog/0.18.0 \
 --without-ppl

显然，我无法轻易更改ld可执行文件，gcc始终使用全局系统/usr/bin/ld进行编译.

Apparently I can't change the ld executable so easily, gcc keeps compiling with the global system /usr/bin/ld.

有人可以说这是怎么回事，以及如何解决此链接阶段?

Someone can say what is going on here and how to fix this linking phase ?

我在Ubuntu 64位环境下，我正在尝试编译32位版本的gcc，当然我已经为32位编译了gmp，mpc，mpfr.

I'm under Ubuntu 64 bit and I'm trying to compile a 32 bit build of gcc, of course I have already compiler gmp, mpc, mpfr for 32 bits.

推荐答案

课程 ，您可以使用64位OS，编译器和链接程序从源代码以32位形式构建gcc.问题绝对不是"ld".

Of course you can build gcc from source as 32-bit, using a 64-bit OS, compiler and linker. The problem is definitely not "ld".

您做的完全正确:在CFLAGS和LDFLAGS中指定"-m32".

You're doing exactly the right thing: specifying "-m32" in CFLAGS and LDFLAGS.

问题是build/gengenrtl.o和build/errors.o似乎是为64位(而不是32位)构建的.

The problem is that build/gengenrtl.o and build/errors.o appear to have been built for 64-bit (instead of 32-bit).

建议:

1)检查makefile，并检查您的构建日志.看看这两个文件的构建命令是否有任何不同".

1) Check the makefile, and check your build log. See if there's anything "different" about the build commands for those two files.

2)使用"nm"命令来验证其余* .o对象文件是否正确构建为32位-仅(错误地)仅将"gengenrtl.o"和"errors.o"构建为32位. ELFCLASS64.

2) Use the "nm" command to verify that the rest of your *.o object files were correctly built as 32-bit - that only "gengenrtl.o" and "errors.o" were (incorrectly) built as ELFCLASS64.

'希望有帮助...

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