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It's no-op on all platforms
Reviewers: bgamari, simonmar, erikd, dfeuer
Reviewed By: dfeuer
Subscribers: dfeuer, thomie, carter
Differential Revision: https://phabricator.haskell.org/D4588
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This both says what we mean and silences a bunch of spurious CPP linting
warnings. This pragma is supported by all CPP implementations which we
support.
Reviewers: austin, erikd, simonmar, hvr
Reviewed By: simonmar
Subscribers: rwbarton, thomie
Differential Revision: https://phabricator.haskell.org/D3482
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Test Plan: Validate on lots of platforms
Reviewers: erikd, simonmar, austin
Reviewed By: erikd, simonmar
Subscribers: michalt, thomie
Differential Revision: https://phabricator.haskell.org/D2699
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This reverts commit 39b5c1cbd8950755de400933cecca7b8deb4ffcd.
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This will hopefully help ensure some basic consistency in the forward by
overriding buffer variables. In particular, it sets the wrap length, the
offset to 4, and turns off tabs.
Signed-off-by: Austin Seipp <austin@well-typed.com>
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This has no effect with static libraries, but when the RTS is in a
shared library it does two things:
- it prevents the function from being exposed by the shared library
- internal calls to the function can use the faster non-PLT calls,
because the function cannot be overriden at link time.
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The first phase of this tidyup is focussed on the header files, and in
particular making sure we are exposinng publicly exactly what we need
to, and no more.
- Rts.h now includes everything that the RTS exposes publicly,
rather than a random subset of it.
- Most of the public header files have moved into subdirectories, and
many of them have been renamed. But clients should not need to
include any of the other headers directly, just #include the main
public headers: Rts.h, HsFFI.h, RtsAPI.h.
- All the headers needed for via-C compilation have moved into the
stg subdirectory, which is self-contained. Most of the headers for
the rest of the RTS APIs have moved into the rts subdirectory.
- I left MachDeps.h where it is, because it is so widely used in
Haskell code.
- I left a deprecated stub for RtsFlags.h in place. The flag
structures are now exposed by Rts.h.
- Various internal APIs are no longer exposed by public header files.
- Various bits of dead code and declarations have been removed
- More gcc warnings are turned on, and the RTS code is more
warning-clean.
- More source files #include "PosixSource.h", and hence only use
standard POSIX (1003.1c-1995) interfaces.
There is a lot more tidying up still to do, this is just the first
pass. I also intend to standardise the names for external RTS APIs
(e.g use the rts_ prefix consistently), and declare the internal APIs
as hidden for shared libraries.
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2301: Control-C now causes the new exception (AsyncException
UserInterrupt) to be raised in the main thread. The signal handler
is set up by GHC.TopHandler.runMainIO, and can be overriden in the
usual way by installing a new signal handler. The advantage is that
now all programs will get a chance to clean up on ^C.
When UserInterrupt is caught by the topmost handler, we now exit the
program via kill(getpid(),SIGINT), which tells the parent process that
we exited as a result of ^C, so the parent can take appropriate action
(it might want to exit too, for example).
One subtlety is that we have to use a weak reference to the ThreadId
for the main thread, so that the signal handler doesn't prevent the
main thread from being subject to deadlock detection.
1619: we now ignore SIGPIPE by default. Although POSIX says that a
SIGPIPE should terminate the process by default, I wonder if this
decision was made because many C applications failed to check the exit
code from write(). In Haskell a failed write due to a closed pipe
will generate an exception anyway, so the main difference is that we
now get a useful error message instead of silent program termination.
See #1619 for more discussion.
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- GCAux.c contains code not compiled with the gct register enabled,
it is callable from outside the GC
- marking functions are moved to their relevant subsystems, outside
the GC
- mark_root needs to save the gct register, as it is called from
outside the GC
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Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.
The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level. The build system now makes no
pretense at being multi-project, it is just the GHC build system.
No doubt this will break many things, and there will be a period of
instability while we fix the dependencies. A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.
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