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Looks like https://github.com/llvm/llvm-project/pull/166517 is breaking
libc-riscv32-qemu-yocto-fullbuild-dbg build due to failing overflow test
for strfrom.
https://lab.llvm.org/buildbot/#/changes/58668
```
int result = func(buff, sizeof(buff), "%.2147483647f", 1.0f);
EXPECT_LT(result, 0);
ASSERT_ERRNO_FAILURE();
```
```
[ RUN ] LlvmLibcStrfromdTest.CharsWrittenOverflow
/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/test/src/stdlib/StrfromTest.h:493: FAILURE
Expected: result
Which is: 0
To be less than: 0
Which is: 0
/home/libcrv32buildbot/bbroot/libc-riscv32-qemu-yocto-fullbuild-dbg/llvm-project/libc/test/src/stdlib/StrfromTest.h:494: FAILURE
Expected: 0
Which is: 0
To be not equal to: static_cast<int>(libc_errno)
Which is: 0
[ FAILED ] LlvmLibcStrfromdTest.CharsWrittenOverflow
Ran 8 tests. PASS: 7 FAIL: 1
```
At first glance it seem like there is some kind of overflow in
internal::strfromfloat_convert on 32bit archs because the other overflow
test case is passing for snprintf. Interestingly, it passes on all other
buildbots, including libc-arm32-qemu-debian-dbg.
This issue likely wasn't introduced by
https://github.com/llvm/llvm-project/pull/166517 and was probably
already present, so I'm not reverting the change just disabling the test
case on riscv32 until I can debug properly.
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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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RE apply https://github.com/llvm/llvm-project/pull/133643/commits#top
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Reverts llvm/llvm-project#133643
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* Relates to: https://github.com/llvm/llvm-project/issues/119281
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Dyadic floats were an existing option for float to string conversion,
but it had become stale. This patch fixes it up as well as adding proper
config options and test support. Due to the test changes this is a
followup to #110759
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Adds tests for `inf` and `nan` values to the tests for `strfrom*()`
functions.
Also marks some variables as `[[maybe_unused]]` to silence unused
variable warnings.
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Follow up to #85438.
Implements the functions `strfromd()` and `strfroml()` introduced in
C23, and unifies the testing framework for `strfrom*()` functions.
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