Jan Höppner 908067bdf9 common.mak: Fix slow build ...

The relative subdirectory path of a build target is determined via a
separate shell command that issues 'cd' and 'pwd'. Spawning a separate
shell is very costly and can lead to extremely slow builds in some
circumstances.

Replace the shell command with the make built-in command 'realpath' to
accomplish the same result more efficiently.

Tested-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>

2023-05-26 12:21:03 +02:00

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