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-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
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./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-32bit
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