# Test from Michael Kerrisk, modified by David A. Wheeler,
# showing that /lib is tested before /usr/lib in the ELF loader
# (this is the reverse of a.out as documented in the ld.so man page)

# Run this as ROOT (because it has to copy files to /lib and /usr/lib)

# Compile /usr/lib version
gcc -c -fPIC -DVERSION='"USRLIB"' mod1.c
gcc -shared -o libdemo.so mod1.o
mv libdemo.so /usr/lib

# Compile /lib version
gcc -c -fPIC -DVERSION='"LIB"' mod1.c
gcc -shared -o libdemo.so mod1.o
mv libdemo.so /lib

# Compile & run test.
gcc sltest.c -ldemo -o sltest
./sltest