linux系统64位编译32位的库,在64位linux上编译32位程序

在64位linux上编译32位程序

[编辑中]

-m32

# ld -V

GNU ld version 2.15.92.0.2 20040927

Supported emulations:

elf_x86_64

elf_i386

i386linux

#ld -m elf_i386

Along with the -m32 flag in gcc, you may need to include the -melf_i386 flag for ld to properly link the 32bit object files to the 32bit libraries if you have both the 32bit and 64bit libraries.

make libdir=/usr/lib64

make  libdir=/usr/lib

的系统上编译时需要链接64位的库文件，而/usr/lib/libexpat.so是32位的ELF格式，所以格式不对。在configure的时候添加LDFLAGS="-L/usr/lib64 -L/lib64" 选项即可

./configure CFLAGS=-m32 CXXFLAGS=-m32 FFLAGS=-m32 FCFLAGS=-m32 LDFLAGS=-melf_i386 --prefix=/root/j131/testhttpd/apache-32bit

./configure CFLAGS=-m32 CXXFLAGS=-m32 FFLAGS=-m32 FCFLAGS=-m32 LDFLAGS="-L/usr/lib" --prefix=/root/j131/testhttpd/apache-32b