[riot-notifications] [RIOT-OS/RIOT] tools/openocd: check if to variable for extra reset_config is set (#12157)

Alexandre Abadie notifications at github.com
Tue Sep 3 08:22:52 CEST 2019

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### Contribution description

This PR fixes a warning message raised by OpenOCD when flashing without `OPENOCD_RESET_USE_CONNECT_ASSERT_SRST = 1` so on almost all boards flashed by OpenOCD except `nucleo-f091rc`.
The message is: `openocd.sh: line 124: [: : integer expression expected`

The fix is simply to also check if the variable is set.

Another solution could be to assign a default value of `0`, e.g. [here](https://github.com/RIOT-OS/RIOT/blob/master/dist/tools/openocd/openocd.sh#L77). I don't know what's best.

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-- Commit Summary --

  * tools/openocd: check if reset_config variable is set

-- File Changes --

    M dist/tools/openocd/openocd.sh (3)

-- Patch Links --


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