Does anyone understand the nitty gritty of .NOTPARALLEL and whether it
can do what I want?
Please note, the example here is a very simple case and there are
easy ways to do it without using .NOTPARALLEL but I'm specifically
asking about how .NOTPARALLEL is supposed to work.
---
.NOTPARALLEL: rule1 rule2
rule: rule1 rule2
rule1: A B C
rule2: D E F
A:
sleep 2
echo "A built"
B:
sleep 2
echo "B built"
C:.
sleep 2
echo "C built"
D:
sleep 2
echo "D built"
E:
sleep 2
echo "E built"
F:.
sleep 2
echo "F built"
---
What I want is for A, B and C to be executed serially and for D, E and F
to be executed serially but that rule1 can be executed in parallel with
rule2.
From the manual:
If the .NOTPARALLEL special target has prerequisites, then each of those
prerequisites will be considered a target and all prerequisites of these
targets will be run serially. Note that only when building this target
will the prerequisites be run serially
No matter what I put for the prerequisites of .NOTPARALLEL (even if I
put in a completely different target), it runs as if it has no
prerequisites at all:
If the .NOTPARALLEL special target with no prerequisites is specified
anywhere then the entire instance of make will be run serially,
regardless of the parallel setting.
make --version
GNU Make 4.3
Built for x86_64-pc-linux-gnu
(removing it completely and all six targets run in parallel so I'm
clearly giving make the correct -j option for parallel running)
Tim.
