在 64 位元系統上編譯 32 位元程式

安裝 32 位元函式庫

# apt-get install ia32-libs-dev
# apt-get install lib32z1-dev

gcc 模擬 32 位元

$ gcc -m32 -o output32 hello.c

References :
linux - /usr/bin/ld: skipping incompatible foo.so when searching for foo - Stack Overflow
HowTo Compile a 32-bit Application Using gcc On the 64-bit Linux Version - nixCraft

run 32-bit programs on a 64-bit Debian/Ubuntu

# dpkg --add-architecture i386 # enable multi-arch
# apt-get update
# apt-get install libc6:i386 # install base 32bit libraries

References :
apt - Unable to install ia32-libs in Debian Wheezy - Unix & Linux Stack Exchange
Multiarch/HOWTO - Debian Wiki