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Mdir switch does not work if presented with more than one level of uncreated directories #699
I noticed a weakness with the Mdir switch a while ago, just tested it on v3.853: if you specify more than one level of hierarchy with the MDir switch, all but the last directory must already exist:
In effect it's the same as using Unix mkdir without the -p switch; I trust a simple fix.
Original Redmine Comment
The reason we noticed it was because we were generating different output in the same object directory, but under different sub-directories (Verilating the whole the design, and also the sub-blocks):
Our W/A is just to precreate the sub-level of hierarchy in the Makefile.