The new path for recompiling from machine-independent files
trues to read a ".zo" file without holding the recmopilation
lock and without an `exn:fail:filesystem` handler.
Wait until replacement is more assured before deleting an existing
".zo" file.
Also, don't delete a ".zo" file that is later in the
`current-compiled-file-roots` search path than the one being written.
This refinement supports setting up a search path to try
machine-specific compiled files and fall back to machine-independent
files, for example.
Add `-M`/`--compile-any` to `raco setup`, `raco pkg install`, etc., to
build machine-independent bytecode, which is useful in the process of
building distributions.
The `parallel-lock-client` protocol expects a #f back when a
file was meanwhile compiled by another process. So, don't
just forget about a file after it is compiled, in case there
is still a lock request on the way for that file.
Actually, the machine-independent-to-specific part is trivial. The
hard part was making `compiled-expression-recompile` enable
cross-linklet optimization as it recompiles, since that involves
pulling apart metadata and putting it back together afterward.
The `compile-machine-indendent` parameter controls whether `compile`
creates a compiled expression that writes (usually in a ".zo" file) to
a machine-independent form that works for anhy Racket platform and
virtual machine. The parameter can be set through the
`-M`/`--compile-any` command-line flag or the `PLT_COMPILE_ANY`
environment variable.
Loading machine-independent code is too slow for many purposes, but
separating macro expansion from backend compilation seems likely to be
a piece of the puzzle from cross-compilation and faster distribution
builds.
Converting "invalid memory reference" to an `exn:fail:contract` (which
is the default conversion) hides crashes as success when a test
expects an error.
Also, fix a bug that was hiding as an expected excdeption.
The Racket and RacketCS implementations had separate copies of
linklet-directory and linklet-bundle reading and writing. Move the
implementation into the expander layer.
The primitive '#%linklet instance now omits directory and bundle
operations and `read-compiled-linklet`. It intead must provide
`write-linklet-bundle-hash`, `read-linklet-bundle-hash`, and
`linklet-virtual-machine-bytes`.
In particular, when there isn't any redundancy detected, then
just make a single call into the projection and create just a single
class.
This seems to help on at least one of the configurations of
dungeon, which completes in about 6 minutes with this commit
and I gave up waiting after 15 minutes for the version of
racket that didn't have it
Improves the error message for:
```
(define-syntax (like-lambda stx)
(syntax-case stx ()
[(_ e) #'(lambda () e)]))
(like-lambda (define x 1))
```
Based on a report from @pkoronkevich.
When an executable distibution is created, some path become
unavailable at run time, such as the result of `find-links-file`.
Change the contract on those functions and adjust the implementation
to return `#f` in those cases. This is a backward-compatible change in
the sense that uses that now return `#f` would have crashed before
(although it does shift the blame in that case).
Based on an initial patch by Shu-Hung.
Closes#2352
