[libc++] Make sure that all headers can be included with modules enabled

This commit ensures that we can include all libc++ headers with modules
enabled. It adds a test to ensure that this doesn't r

[libc++] Make sure that all headers can be included with modules enabled

This commit ensures that we can include all libc++ headers with modules
enabled. It adds a test to ensure that this doesn't regress, which is
necessary because our modules CI job does not build in all Standard modes.

Differential Revision: https://reviews.llvm.org/D125331

show more ...

[libc++] Improve error messages for disabled modes

We should not surface CMake-level options like LIBCXX_ENABLE_FILESYSTEM
to our users, since they don't know what it means. Instead, use a slightly

[libc++] Improve error messages for disabled modes

We should not surface CMake-level options like LIBCXX_ENABLE_FILESYSTEM
to our users, since they don't know what it means. Instead, use a slightly
more general wording.

Also, add an error in <ios> to improve the quality of errors for people
trying to use <iostream> when localization is disabled.

Differential Revision: https://reviews.llvm.org/D125910

show more ...

[libc++] Ensure that all public C++ headers include <__assert>

This patch changes the requirement for getting the declaration of the
assertion handler from including <__assert> to including any publ

[libc++] Ensure that all public C++ headers include <__assert>

This patch changes the requirement for getting the declaration of the
assertion handler from including <__assert> to including any public
C++ header of the library. Note that C compatibility headers are
excluded because we don't implement all the C headers ourselves --
some of them are taken straight from the C library, like assert.h.

It also adds a generated test to check it. Furthermore, this new
generated test is designed in a way that will make it possible to
replace almost all the existing test-generation scripts with this
system in upcoming patches.

Differential Revision: https://reviews.llvm.org/D122506

show more ...

[libc++] Define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER whenever we enable warnings in the test suite

This should make CI consistent on all the compilers we support. Most of
this patch is working around

[libc++] Define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER whenever we enable warnings in the test suite

This should make CI consistent on all the compilers we support. Most of
this patch is working around various warnings emitted by GCC in our code
base, which are now being shown when we compile the tests.

After this patch, the whole test suite should be warning free on all
compilers we support and test, except for a few warnings on GCC that
we silence explicitly until we figure out the proper fix for them.

Differential Revision: https://reviews.llvm.org/D120684

show more ...

[libc++] Normalize all our '#pragma GCC system_header', and regression-test.

Now we'll notice if a header forgets to include this magic phrase.

Differential Revision: https://reviews.llvm.org/D1188

[libc++] Normalize all our '#pragma GCC system_header', and regression-test.

Now we'll notice if a header forgets to include this magic phrase.

Differential Revision: https://reviews.llvm.org/D118800

show more ...

[libc++] Add the version header to all headers.

Some headers which require the version header depend on other headers to
provide it. Include the version header in all top-level headers to make
sure

[libc++] Add the version header to all headers.

Some headers which require the version header depend on other headers to
provide it. Include the version header in all top-level headers to make
sure a header cleanup can't remove the version header.

Note this doesn't add the version header to the c headers.

Reviewed By: #libc, Quuxplusone, ldionne

Differential Revision: https://reviews.llvm.org/D116172

show more ...

[runtimes][NFC] Remove filenames at the top of the license notice

We've stopped doing it in libc++ for a while now because these names
would end up rotting as we move things around and copy/paste st

[runtimes][NFC] Remove filenames at the top of the license notice

We've stopped doing it in libc++ for a while now because these names
would end up rotting as we move things around and copy/paste stuff.
This cleans up all the existing files so as to stop the spreading
as people copy-paste headers around.

show more ...

[libc++] Alphabetize and include-what-you-use. NFCI.

Differential Revision: https://reviews.llvm.org/D102781

[libc++] [docs] Mark P1865 as complete since 11.0 as it was implemented together with P1135. Fix synopses in <barrier> and <latch>.

It was implemented in commit 54fa9ecd3088508b05b0c5b5cb52da8a3c188

[libc++] [docs] Mark P1865 as complete since 11.0 as it was implemented together with P1135. Fix synopses in <barrier> and <latch>.

It was implemented in commit 54fa9ecd3088508b05b0c5b5cb52da8a3c188655 ([libc++] Implementation of C++20's P1135R6 for libcxx).

show more ...

[libc++] Update and normalize the "all the headers" tests.

Some C++20 headers weren't added properly to all three of these
test files. Add them, and take the time to normalize the formatting
so that

[libc++] Update and normalize the "all the headers" tests.

Some C++20 headers weren't added properly to all three of these
test files. Add them, and take the time to normalize the formatting
so that

diff <(grep '#include' foo.cpp) <(grep '#include' bar.cpp)

shows no diffs (except that `no_assert_include` deliberately
excludes `<cassert>`).

- Add macro guards to <{barrier,latch,semaphore}>.
- Add macro guards to <experimental/simd>.
- Remove an include of <cassert> from <semaphore>.
- Instead, include <cassert> in the semaphore tests.

Differential Revision: https://reviews.llvm.org/D92525

show more ...

[libc++] Rework the whole availability markup implementation

Currently, vendor-specific availability markup is enabled by default.
This means that even when building against trunk libc++, the header

[libc++] Rework the whole availability markup implementation

Currently, vendor-specific availability markup is enabled by default.
This means that even when building against trunk libc++, the headers
will by default prevent you from using some features that were not
released in the dylib on your target platform. This is a source of
frustration since people building libc++ from sources are usually not
trying to use some vendor's released dylib.

For that reason, I've been thinking for a long time that availability
annotations should be off by default, which is the primary change that
this commit enables.

In addition, it reworks the implementation to make it easier for new
vendors to add availability annotations for their platform, and it
refreshes the documentation to reflect the current state of the codebase.

Finally, a CMake configuration option is added to control whether
availability annotations should be turned on for the flavor of libc++
being created. The intent is for vendors like Apple to turn it on, and
for the upstream libc++ to leave it off (the default).

Differential Revision: https://reviews.llvm.org/D90843

show more ...

[libc++] Add availability markup for the C++20 Synchronization Library on Apple

[libc++] Proper fix for libc++'s modulemap after D68480

Summary:
In libc++, we normally #ifdef out header content instead of #erroring
out when the Standard in use is insufficient for the requiremen

[libc++] Proper fix for libc++'s modulemap after D68480

Summary:
In libc++, we normally #ifdef out header content instead of #erroring
out when the Standard in use is insufficient for the requirements of
the header.

Reviewers: EricWF

Subscribers: jkorous, dexonsmith, libcxx-commits, teemperor

Tags: #libc

Differential Revision: https://reviews.llvm.org/D75074

show more ...

[libc++] Implementation of C++20's P1135R6 for libcxx

Differential Revision: https://reviews.llvm.org/D68480