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https://github.com/llvm/llvm-project/issues/159474
Another try of trying to land
https://github.com/llvm/llvm-project/pull/166382
- Fix some leftover tests checking for specific errnos
- Guard errno checking tests to not run on the GPU
@michaelrj-google
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https://github.com/llvm/llvm-project/issues/159474
Resubmitting https://github.com/llvm/llvm-project/pull/162876 with fixes
as it broke some buildbots:
- Fix comparisons of integer expressions of different signedness
- Not check for specific errnos in tests, as they might not be available
on all platforms
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[#159474](https://github.com/llvm/llvm-project/issues/159474)
- All printf variants set errno and consistently return -1 on error,
instead of returning various predefined error codes
- Return value overflow handling is added
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Reverts llvm/llvm-project#152748
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This is a follow up to the RFC here:
https://discourse.llvm.org/t/rfc-implementation-of-stdio-on-baremetal/86944
This provides the stdout/stderr/stdin symbols (which now don't have to
provided by the user). This allows the user to have access to all
functions, currently I've only tested `fprintf` but in theory everything
that works in the generic folder should work in the baremetal
configuration.
All streams are _non-buffered_, which does NOT require flushing. It is
based on the CookieFile that already existed
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In #94078, `write_to_stdout` had not been fully implemented. However,
now that it has been implemented, to conform with the C standard
(7.23.6.3. The printf function, specifically point 2), we use `stdout`.
This issue is tracked in #94685.
- Also prefer `static constexpr`
- Made it explicit that we are writing to `stdout`
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This addresses build errors from https://github.com/llvm/llvm-project/pull/111559.
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Commit 598e882ee88a1e3 turned `Writer` into a template, and updated most
of the call sites that use it. But not all. The alternative FP printf
system in `float_dec_converter_limited.h` wasn't updated, and neither
was `baremetal/printf.cpp` or `baremetal/vprintf.cpp`.
This patch updates `float_dec_converter_limited.h` in the same way that
the previous commit updated `float_dec_converter.h`: propagate the
templatedness through everything in the header, so that anything using a
`Writer` at all has a `write_mode` template parameter to pass on to it.
`printf.cpp` and `vprintf.cpp` are updated in the same way that the
previous commit updated `printf_core/vfprintf_internal.h`: the
`WriteBuffer` has parameter `WriteMode::FLUSH_TO_STREAM`, and `Writer`
picks it up implicitly from that.
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This is a part of #97655.
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declaration" (#98593)
Reverts llvm/llvm-project#98075
bots are broken
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This is a part of #97655.
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reland of https://github.com/llvm/llvm-project/pull/98215
Additionally adds proxy headers for FILE and the fopencookie types
The arm32 build has been failing due to redefinitions of the off_t type.
This patch fixes this by moving off_t to a proper proxy header. To do
this, it also moves stdio macros to a proxy header to hopefully avoid
including this proxy header alongside this public stdio.h.
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In #94685 I discussed my ideas for cleaner baremetal output writing.
This patch is not that. This patch just uses `write_to_stderr` for
outputting from putchar and printf on baremetal. I'm still planning to
create a proper design for writing to stdout and stderr on various
platforms, but that will be a followup patch.
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For baremetal targets that don't support FILE, this version of printf
just writes directly to a function provided by a vendor. To do this both
printf and vprintf were moved to /generic (vprintf since they need the
same flags and cmake gets funky about setting variables in one file and
reading them in another).
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