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* [libc++] [P1612] Add missing feature-test macro __cpp_lib_endian.Louis Dionne2019-11-142-0/+40
| | | | | | Thanks to Marek Kurdej for the patch. Differential Revision: https://reviews.llvm.org/D70221
* P0722R3: Implement library support for destroying deleteEric Fiselier2019-05-232-6/+6
| | | | | | | | | | | | | | | | | | Summary: This provides the `std::destroying_delete_t` declaration in C++2a and after. (Even when the compiler doesn't support the language feature). However, the feature test macro `__cpp_lib_destroying_delete` is only defined when we have both language support and C++2a. Reviewers: ldionne, ckennelly, serge-sans-paille, EricWF Reviewed By: EricWF Subscribers: dexonsmith, riccibruno, christof, jwakely, jdoerfert, mclow.lists, ldionne, libcxx-commits Differential Revision: https://reviews.llvm.org/D55840 llvm-svn: 361572
* Implement midpoint for floating point types. Reviewed as ↵Marshall Clow2019-04-252-0/+40
| | | | | | https://reviews.llvm.org/D61014. llvm-svn: 359184
* Add std::is_constant_evaluated.Eric Fiselier2019-04-242-6/+6
| | | | | | | | | Clang recently added __builtin_is_constant_evaluated() and GCC 9.0 has it as well. This patch adds support for it in libc++. llvm-svn: 359119
* Support tests in freestandingJF Bastien2019-02-0446-46/+54
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
* Move the feature test macros script to the utils directory.Eric Fiselier2019-02-021-975/+0
| | | | | | | It doesn't make a lot of sense to keep it with the tests, deep into the test suite directonies. llvm-svn: 352970
* Update generator script to use the new license file header.Chandler Carruth2019-01-191-4/+3
| | | | llvm-svn: 351650
* Update more file headers across all of the LLVM projects in the monorepoChandler Carruth2019-01-1947-188/+141
| | | | | | | | | | | | | | | | | | 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
* correct script name in generated testsEric Fiselier2019-01-1643-89/+91
| | | | llvm-svn: 351299
* Fix feature test macros for atomics/mutexes without threadingEric Fiselier2019-01-164-73/+177
| | | | llvm-svn: 351291
* Implement feature test macros using a script.Eric Fiselier2019-01-1643-1054/+7079
| | | | | | | | | | | | | | | | | | | | Summary: This patch implements all the feature test macros libc++ currently supports, as specified by the standard or cppreference prior to C++2a. The tests and `<version>` header are generated using a script. The script contains a table of each feature test macro, the headers it should be accessible from, and its values of each dialect of C++. When a new feature test macro is added or needed, the table should be updated and the script re-run. Reviewers: mclow.lists, jfb, serge-sans-paille Reviewed By: mclow.lists Subscribers: arphaman, jfb, ldionne, libcxx-commits Differential Revision: https://reviews.llvm.org/D56750 llvm-svn: 351286
* Add the feature test macros that were defined in p1353r0 to the headers of ↵Marshall Clow2019-01-073-1/+35
| | | | | | the appropriate tests. No actual tests yet, so NFC. llvm-svn: 350535
* Implement P1209 - Adopt Consistent Container Erasure from Library ↵Marshall Clow2018-12-149-0/+100
| | | | | | Fundamentals 2 for C++20. Reviewed as https://reviews.llvm.org/D55532 llvm-svn: 349178
* Fix problems with char8_t stuff on compilers that don't support char8_t yetMarshall Clow2018-12-119-9/+9
| | | | llvm-svn: 348829
* Second part of P0482 - char8_t. Reviewed as https://reviews.llvm.org/D55308Marshall Clow2018-12-1145-8/+275
| | | | llvm-svn: 348828
* [libcxx] [test] Strip trailing whitespace. NFC.Stephan T. Lavavej2018-11-141-1/+1
| | | | llvm-svn: 346826
* Update commnents to reflect the changes for LWG#3127. NFCMarshall Clow2018-10-222-1/+31
| | | | llvm-svn: 344951
* Update commnents to reflect the changes for LWG#3122. NFCMarshall Clow2018-10-222-0/+2
| | | | llvm-svn: 344950
* Fix threaded test under no-threading configurationEric Fiselier2018-10-012-0/+4
| | | | llvm-svn: 343432
* Implement the infrastructure for feature-test macros. Very few actual ↵Marshall Clow2018-09-1240-0/+1486
feature test macros, though. Reviewed as: https://reviews.llvm.org/D51955 llvm-svn: 342073
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