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# find out whether we can include <sys/swap.h>
# and whether libc thinks that swapon() has two arguments.
CC=${CC-cc}
compile="$CC -o conftest conftest.c >/dev/null 2>&1"
rm -f conftest conftest.c swapargs.h
SWAPH=
if [ -f /usr/include/sys/swap.h ]; then SWAPH="#include <sys/swap.h>"; fi
echo $SWAPH > conftest.c
echo '#include <unistd.h>
main(){ exit(0); swapon("/dev/null", 0); }' >> conftest.c
eval $compile
if test -s conftest && ./conftest 2>/dev/null; then
echo "#define SWAPON_HAS_TWO_ARGS" > swapargs.h
echo $SWAPH >> swapargs.h
else
echo > swapargs.h
echo "
Your libc thinks that swapon has 1 arg only.
Define SWAPON_NEEDS_TWO_ARGS in swapon.c if you want to use priorities.
" 1>&2
fi
rm -f conftest conftest.c
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