运行命令
gcc -v
显示:
Target: x86_64-linux-gnu
所以,我这里的gcc默认生成64位的程序。
如果想编出32位的程序,就要加 -m32选项。可是我尝试了,还是不行。
原来,需要安装东西。
- $ sudo apt-get install build-essential module-assistant
- $ sudo apt-get install gcc-multilib g++-multilib
装好之后,就OK了。
比如:
gcc -m32 hello.c
如果编译时出现以下错误:
.//libupdate.so: undefined reference to `operator delete(void*)'
.//libupdate.so: undefined reference to `operator new(unsigned int)'
.//libupdate.so: undefined reference to `__cxa_pure_virtual'
.//libupdate.so: undefined reference to `operator delete[](void*)'
.//libupdate.so: undefined reference to `operator new[](unsigned int)'
.//libupdate.so: undefined reference to `__gxx_personality_v0'
.//libupdate.so: undefined reference to `vtable for __cxxabiv1::__si_class_type_info'
.//libupdate.so: undefined reference to `pow'
.//libupdate.so: undefined reference to `vtable for __cxxabiv1::__class_type_info'
collect2: error: ld returned 1 exit status
可以改用g++,或者添加选项:-lstdc++
转载于:https://www.cnblogs.com/longintchar/p/5224400.html