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Thanks to Zoe for the (big, but simple) patch. NFC intended.
llvm-svn: 362252
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Summary:
Freestanding is *weird*. The standard allows it to differ in a bunch of odd
manners from regular C++, and the committee would like to improve that
situation. I'd like to make libc++ behave better with what freestanding should
be, so that it can be a tool we use in improving the standard. To do that we
need to try stuff out, both with "freestanding the language mode" and
"freestanding the library subset".
Let's start with the super basic: run the libc++ tests in freestanding, using
clang as the compiler, and see what works. The easiest hack to do this:
In utils/libcxx/test/config.py add:
self.cxx.compile_flags += ['-ffreestanding']
Run the tests and they all fail.
Why? Because in freestanding `main` isn't special. This "not special" property
has two effects: main doesn't get mangled, and main isn't allowed to omit its
`return` statement. The first means main gets mangled and the linker can't
create a valid executable for us to test. The second means we spew out warnings
(ew) and the compiler doesn't insert the `return` we omitted, and main just
falls of the end and does whatever undefined behavior (if you're luck, ud2
leading to non-zero return code).
Let's start my work with the basics. This patch changes all libc++ tests to
declare `main` as `int main(int, char**` so it mangles consistently (enabling us
to declare another `extern "C"` main for freestanding which calls the mangled
one), and adds `return 0;` to all places where it was missing. This touches 6124
files, and I apologize.
The former was done with The Magic Of Sed.
The later was done with a (not quite correct but decent) clang tool:
https://gist.github.com/jfbastien/793819ff360baa845483dde81170feed
This works for most tests, though I did have to adjust a few places when e.g.
the test runs with `-x c`, macros are used for main (such as for the filesystem
tests), etc.
Once this is in we can create a freestanding bot which will prevent further
regressions. After that, we can start the real work of supporting C++
freestanding fairly well in libc++.
<rdar://problem/47754795>
Reviewers: ldionne, mclow.lists, EricWF
Subscribers: christof, jkorous, dexonsmith, arphaman, miyuki, libcxx-commits
Differential Revision: https://reviews.llvm.org/D57624
llvm-svn: 353086
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to reflect the new license. These used slightly different spellings that
defeated my regular expressions.
We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.
Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.
llvm-svn: 351648
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test/std/numerics/numeric.ops/exclusive.scan/exclusive_scan.pass.cpp
test/std/numerics/numeric.ops/exclusive.scan/exclusive_scan_init_op.pass.cpp
test/std/numerics/numeric.ops/inclusive.scan/inclusive_scan.pass.cpp
test/std/numerics/numeric.ops/inclusive.scan/inclusive_scan_op.pass.cpp
test/std/numerics/numeric.ops/inclusive.scan/inclusive_scan_op_init.pass.cpp
test/std/numerics/numeric.ops/transform.exclusive.scan/transform_exclusive_scan_init_bop_uop.pass.cpp
test/std/numerics/numeric.ops/transform.inclusive.scan/transform_inclusive_scan_bop_uop.pass.cpp
test/std/numerics/numeric.ops/transform.inclusive.scan/transform_inclusive_scan_bop_uop_init.pass.cpp
Fix MSVC x64 truncation warnings.
warning C4267: conversion from 'size_t' to 'int', possible loss of data
test/std/strings/basic.string/string.modifiers/string_append/push_back.pass.cpp
Fix MSVC uninitialized memory warning.
warning C6001: Using uninitialized memory 'vl'.
test/std/utilities/tuple/tuple.tuple/tuple.cnstr/PR20855_tuple_ref_binding_diagnostics.pass.cpp
Include <cassert> for the assert() macro.
Fixes D43273.
llvm-svn: 326120
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Reviewed as https://reviews.llvm.org/D41748
* These tests use function objects from functional, back_inserter from iterator, and equal from algorithm, so add those headers.
* The use of iota targeting vector<unsigned char> with an int parameter triggers warnings on MSVC++ assigning an into a unsigned char&; so change the parameter to unsigned char with a static_cast.
* Avoid naming unary_function in identity here as that is removed in '17. (This also fixes naming _VSTD, _NOEXCEPT_, and other libcxx-isms)
* Change the predicate in the transform tests to add_ten so that problems with multiple application are caught.
llvm-svn: 321922
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llvm-svn: 309463
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llvm-svn: 306083
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