要让 Ubuntu Server 12.04 LTS 64 位编译 gcc 4.8 32 位程序，您需要做两件事.

To get Ubuntu Server 12.04 LTS 64-bit to compile gcc 4.8 32-bit programs, you'll need to do two things.

1. 确保所有 32 位 gcc 4.8 开发工具都已完全安装:

1. Make sure all the 32-bit gcc 4.8 development tools are completely installed:

sudo apt-get install lib32gcc-4.8-dev

使用 -m32 标志编译程序

Compile programs using the -m32 flag

gcc pgm.c -m32 -o pgm