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tools/nolibc: Make dup2() rely on dup3() when available
A recent boot failure on 5.4-rc3 on arm64 revealed that sys_dup2() is not available and that only sys_dup3() is implemented. This commit detects this and falls back to sys_dup3() when available. This is a port of nolibc's upstream commit fd5272ec2c66 to the Linux kernel. Tested-by: Valentin Schneider <[email protected]> Tested-by: Mark Rutland <[email protected]> [arm64] Signed-off-by: Willy Tarreau <[email protected]> Signed-off-by: Willy Tarreau <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]>
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