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Now that the multitarget testing has settled, clean up the cases where
istarget * is used. This ends up being mostly style unindenting.
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In a multitarget build, we process all targets in order, so make sure
the toolchain settings from one don't leak into the next.
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The sim_init function was called by runtest for each test when --tool
was set to sim. When we changed to --tool '' to collapse the testsuite
dir, the init function was no longer called on every test. However, it
was still being called explicitly by config/default.exp. It's not clear
why that explicit call ever existed since, in the past, it meant it was
redundant.
Lets drop the single sim_init call in config/default.exp and move it out
to all our tests. This replicates the runtest behavior so we can setup
variables on a per-test basis which allows us to recollapse the sim_path
logic back. We'll also leverage this in the future for toolchain setup.
Also add a few comments clarifying the overall runtime behavior.
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Only a few tests actually use global_ld_options, but we can replace the
sim-specific settings with the dejagnu common LDFLAGS_FOR_TARGET and get
the same result.
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Objcopy was used to create a binary file of just the executable code
since the environment requires code to based at address 0. We can
accomplish the same thing with the -Ttext=0 flag, so switch to that
to get rid of custom logic.
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Now that ChangeLog entries are no longer used for sim patches,
this commit renames all relevant sim ChangeLog to ChangeLog-2021,
similar to what we would do in the context of the "Start of New
Year" procedure.
The purpose of this change is to avoid people merging ChangeLog
entries by mistake when applying existing commits that they are
currently working on.
Also throw in a .gitignore entry to keep people from adding new
ChangeLog files anywhere in the sim tree.
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Since we require ports to use a matching subdir name in the testsuite
tree, we can use that to calculate the $arch value.
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Provide a simple example simulator for people porting to new targets
to use as a reference. This one has the advantage of being used by
people and having a fun program available for it.
It doesn't require a special target -- the example simulators can be
built for any existing port.
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