Linux g++ 抛出文件无法识别：文件格式无法识别错误
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g++ throwing file not recognized: File format not recognized error
提问by user1991251
getting following error with the command g++ -o test -L . -l pq
命令出现以下错误 g++ -o test -L . -l pq
libpq.so: file not recognized: File format not recognized
#file libpq.so
libpq.so: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), not stripped
gcc version 4.1.2 20070115 (SUSE Linux)
gcc 版本 4.1.2 20070115 (SUSE Linux)
I am getting the same error if I try to use -l dbodbcinstead of -l pq.
如果我尝试使用-l dbodbc而不是-l pq.
Note that test.cis a simple hello world program.
请注意，这test.c是一个简单的 hello world 程序。
Thanks in Advance.
提前致谢。
回答by Jonathan Wakely
file /usr/bin/g++tells you that g++itself is a 64-bit executable, i.e. it runs on a 64-bit machine, it doesn'ttell you that g++ can compile64-bit code (it's very unlikely but it couldbe a cross compiler for a completely different processor!) Use g++ -vor g++ -dumpmachineto find out what target it generates executables for.
file /usr/bin/g++告诉你它g++本身是一个 64 位可执行文件，即它在 64 位机器上运行，它并没有告诉你 g++ 可以编译64 位代码（这不太可能，但它可能是一个完全不同的交叉编译器处理器！）使用g++ -v或g++ -dumpmachine找出它生成可执行文件的目标。
G++ doesn't actually use that library, it just passes the -loption to the linker, so the error is coming from the linker, ld
G++ 实际上并不使用那个库，它只是将-l选项传递给链接器，所以错误来自链接器，ld
If ldand objdumpare both saying they can't recognize the library but the same file is fine on a different machine, I would try updating or reinstalling the binutilspackage, which provides both ldand objdump.
如果ld并且objdump都说他们无法识别库但同一文件在另一台机器上没问题，我会尝试更新或重新安装binutils包，它同时提供ld和objdump.
You might have a 32-bit binutilsinstalled, so its ldand objdumpwouldn't understand the x86_64 library. Ensure you have the 64-bit (i.e. x86_64) binutils RPM installed.
您可能安装了 32 位binutils，因此它ld并objdump不会理解 x86_64 库。确保您安装了 64 位（即 x86_64）binutils RPM。
