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libbpf/scripts/check-reallocarray.sh

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#/bin/sh
tfile=$(mktemp /tmp/test_reallocarray_XXXXXXXX.c)
ofile=${tfile%.c}.o
cat > $tfile <<EOL
#define _GNU_SOURCE
#include <stdlib.h>
int main(void)
{
return !!reallocarray(NULL, 1, 1);
}
EOL
gcc $tfile -o $ofile >& /dev/null
if [ $? -ne 0 ]; then echo "FAIL"; fi
/bin/rm -f $tfile $ofile