37 lines
1.0 KiB
Plaintext
37 lines
1.0 KiB
Plaintext
# Find out whether we can include <sys/swap.h>
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# and whether libc thinks that swapon() has two arguments.
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# Prepare test
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CC=${CC-cc}
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compile="$CC -o conftest conftest.c >/dev/null 2>&1"
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rm -f conftest conftest.c swapargs.h
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# What include files shall we try?
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# Unfortunately, recent versions of swap.h use PAGE_SIZE and hence need page.h
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# It is used only in mkswap, not in swapon/swapoff, so we might just pick any
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# random value (like #define PAGE_SIZE 4096) instead of including page.h.
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SWAPH=
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PAGEH=
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if [ -f /usr/include/sys/swap.h ]; then
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SWAPH="#include <sys/swap.h>"
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if [ -f /usr/include/asm/page.h ]; then
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PAGEH="#include <asm/page.h>"
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fi
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fi
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echo $PAGEH > conftest.c
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echo $SWAPH >> conftest.c
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echo '#include <unistd.h>
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main(){ exit(0); swapon("/dev/null", 0); }' >> conftest.c
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eval $compile
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if test -s conftest && ./conftest 2>/dev/null; then
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echo "#define SWAPON_HAS_TWO_ARGS" > swapargs.h
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echo $PAGEH >> swapargs.h
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echo $SWAPH >> swapargs.h
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else
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echo > swapargs.h
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echo "
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Your libc thinks that swapon has 1 arg only.
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" 1>&2
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fi
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rm -f conftest conftest.c
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