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Eric Fiselier 1670772adc Fix implementation of ::abs and std::abs LWG 2192. 
Summary:
All overloads of `::abs` and `std::abs` must be present in both `<cmath>` and `<cstdlib>`. This is problematic to implement because C defines `fabs` in `math.h` and `labs` in `stdlib.h`. This introduces a circular dependency between the two headers. 

This patch implements that requirement by moving `abs` into `math.h` and making `stdlib.h` include `math.h`. In order to get the underlying C declarations from the "real" `stdlib.h` inside our `math.h` we need some trickery. Specifically we need to make `stdlib.h` include next itself.

Suggestions for a cleaner implementation are welcome.

Reviewers: mclow.lists, ldionne

Reviewed By: ldionne

Subscribers: krytarowski, fedor.sergeev, dexonsmith, jdoerfert, jsji, libcxx-commits

Differential Revision: https://reviews.llvm.org/D60097

llvm-svn: 359020
 		2019-04-23 18:01:58 +00:00
..
experimental Fix visibility for coroutine types on Windows 2019-04-17 04:31:46 +00:00
ext Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
support [libc++] Remove empty header xlocale/xlocale.h 2019-03-11 15:41:51 +00:00
CMakeLists.txt Revert "[coroutines] Add std::experimental::task<T> type" 2019-03-26 19:50:46 +00:00
__bit_reference Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__bsd_locale_defaults.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__bsd_locale_fallbacks.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__config [libc++] Use the no_destroy attribute to avoid destroying debug DB statics 2019-04-17 18:20:19 +00:00
__config_site.in Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__debug Remove exception throwing debug mode handler support. 2019-03-18 21:50:12 +00:00
__errc Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__functional_03 Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__functional_base Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__functional_base_03 Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__hash_table [libc++] Make sure we don't eagerly diagnose non-const comparators for containers of incomplete types 2019-04-11 16:14:56 +00:00
__libcpp_version Bump the trunk version to 9.0.0svn 2019-01-16 10:57:02 +00:00
__locale Fix and speedup __libcpp_locale_guard on Windows 2019-03-27 18:09:30 +00:00
__mutex_base Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__node_handle [libc++] Remove visibility-related warnings with Clang 8 2019-02-27 17:33:25 +00:00
__nullptr Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__split_buffer [Libc++] Use #pragma push_macro/pop_macro to better handle min/max on Windows 2017-05-31 22:07:49 +00:00
__sso_allocator Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__std_stream Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__string Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
__threading_support Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
__tree [libc++] Make sure we don't eagerly diagnose non-const comparators for containers of incomplete types 2019-04-11 16:14:56 +00:00
__tuple [libc++] Declare std::tuple_element as struct instead of class 2019-04-01 16:39:34 +00:00
__undef_macros Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
algorithm [libc++] Make __debug_less::operator() constexpr 2019-04-19 00:52:54 +00:00
any Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
array [libc++] Declare std::tuple_element as struct instead of class 2019-04-01 16:39:34 +00:00
atomic Fix C++03 build failure 2019-03-08 23:30:26 +00:00
bit Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
bitset Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cassert Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
ccomplex Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cctype Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cerrno Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cfenv Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cfloat Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
charconv Make to_chars/from_chars work back to C++11. This means that we can use them to implement to_string as well. Reviewed as https://reviews.llvm.org/D59598. 2019-03-20 18:13:23 +00:00
chrono Fix PR41130 - 'operator/ of std::chrono::duration and custom type'. Thanks to Zulan for the report, and Howard for the direction of the fix. 2019-04-01 16:38:02 +00:00
cinttypes Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
ciso646 Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
climits Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
clocale Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cmath Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
codecvt Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
compare Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
complex Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
complex.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
condition_variable Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
csetjmp Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
csignal Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cstdarg Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cstdbool Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cstddef Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cstdint Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cstdio Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cstdlib Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cstring Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
ctgmath Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
ctime Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
ctype.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cwchar Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
cwctype Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
deque Mark 'front()' and 'back()' as noexcept for array/deque/string/string_view. These are just rebranded 'operator[]', and should be noexcept like it is. 2019-03-19 03:30:07 +00:00
errno.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
exception Make VCRuntime ABI configuration a first-class option. 2019-03-05 01:57:01 +00:00
fenv.h Mark fenv.h as a system header before the #include_next directive 2019-03-29 16:03:57 +00:00
filesystem [libc++] Mark <filesystem> as unavailable on Apple platforms using pragmas 2019-03-20 21:18:14 +00:00
float.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
forward_list Fix list/forward_list implementations of remove_if and unique to deal with predicates that are part of the sequence passed in. We already do this for remove. 2019-04-16 22:11:26 +00:00
fstream [libc++] Mark <filesystem> tests as failing when the dylib doesn't support filesystem 2019-03-20 14:34:00 +00:00
functional [libc++] Use std::is_nothrow_callable for std::invoke according to LWG 2807 2019-04-03 17:54:37 +00:00
future Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
initializer_list Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
inttypes.h Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
iomanip Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
ios [libc++] Fix error flags and exceptions propagated from input stream operations 2019-04-05 16:33:37 +00:00
iosfwd Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
iostream Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
istream [libc++] Fix error flags and exceptions propagated from input stream operations 2019-04-05 16:33:37 +00:00
iterator [libc++] Unconditionally enable the __pad_and_output optimization 2019-04-18 15:19:35 +00:00
limits Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
limits.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
list Fix list/forward_list implementations of remove_if and unique to deal with predicates that are part of the sequence passed in. We already do this for remove. 2019-04-16 22:11:26 +00:00
locale [libc++] Unconditionally enable the __pad_and_output optimization 2019-04-18 15:19:35 +00:00
locale.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
map [libc++] Make sure we don't eagerly diagnose non-const comparators for containers of incomplete types 2019-04-11 16:14:56 +00:00
math.h Fix implementation of ::abs and std::abs LWG 2192. 2019-04-23 18:01:58 +00:00
memory Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
module.modulemap Revert "[coroutines] Add std::experimental::task<T> type" 2019-03-26 19:50:46 +00:00
mutex libc++/win: Make once_flag have the same size as a pointer. 2019-03-20 22:55:03 +00:00
new Make VCRuntime ABI configuration a first-class option. 2019-03-05 01:57:01 +00:00
numeric Add std::midpoint for integral and poiner types. Described in P0811, reviewed as D59099. 2019-03-14 16:25:55 +00:00
optional Cleaup of requirements for optional. While researching LWG3196, I realized that optional did not reject 'const in_place_t' like it should. Added a test as well, and a check for arrays (which were already disallowed, but now we get a better error message). Should not affect anyone's code. 2019-03-25 16:35:59 +00:00
ostream Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
queue Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
random Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
ratio Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
regex Fix PR#35967: '<regex> syntax_option_type is not a proper bitmask' Sadly, this is an ABI break, so it's only available if you define either '_LIBCPP_ABI_VERSION > 2' or '_LIBCPP_ABI_UNSTABLE' or '_LIBCPP_ABI_REGEX_CONSTANTS_NONZERO' and rebuild your dylib. 2019-03-28 17:30:23 +00:00
scoped_allocator Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
set [libc++] Make sure we don't eagerly diagnose non-const comparators for containers of incomplete types 2019-04-11 16:14:56 +00:00
setjmp.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
shared_mutex Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
span [libc++] Declare std::tuple_element as struct instead of class 2019-04-01 16:39:34 +00:00
sstream add a test and a couple minor bug fixes for the implicit-signed-integer-truncation sanitizer. This is PR#40566 2019-02-01 21:59:27 +00:00
stack Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
stdbool.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
stddef.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
stdexcept Fix ABI compatibility of `<stdexcept>` with VCRuntime. 2019-03-06 20:31:57 +00:00
stdint.h Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
stdio.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
stdlib.h Fix implementation of ::abs and std::abs LWG 2192. 2019-04-23 18:01:58 +00:00
streambuf Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
string Mark 'front()' and 'back()' as noexcept for array/deque/string/string_view. These are just rebranded 'operator[]', and should be noexcept like it is. 2019-03-19 03:30:07 +00:00
string.h Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
string_view Mark 'front()' and 'back()' as noexcept for array/deque/string/string_view. These are just rebranded 'operator[]', and should be noexcept like it is. 2019-03-19 03:30:07 +00:00
strstream Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
system_error Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
tgmath.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
thread Fix backwards test that I committed yesterday. Sigh 2019-04-03 00:01:03 +00:00
tuple [libc++] Declare std::tuple_element as struct instead of class 2019-04-01 16:39:34 +00:00
type_traits [libc++] (Take 2) Correctly handle Objective-C++ ARC qualifiers in std::is_pointer 2019-04-03 14:29:52 +00:00
typeindex Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
typeinfo Make VCRuntime ABI configuration a first-class option. 2019-03-05 01:57:01 +00:00
unordered_map [libc++] Make sure we don't eagerly diagnose non-const comparators for containers of incomplete types 2019-04-11 16:14:56 +00:00
unordered_set [libc++] Make sure we don't eagerly diagnose non-const comparators for containers of incomplete types 2019-04-11 16:14:56 +00:00
utility [libc++] Declare std::tuple_element as struct instead of class 2019-04-01 16:39:34 +00:00
valarray Fix a number of bugs in __val_expr's subset operator[]. 2019-04-02 08:05:23 +00:00
variant Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
vector Add visibility attributes and inline to some vector methods. 2019-03-19 19:19:44 +00:00
version Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
wchar.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00
wctype.h Update more file headers across all of the LLVM projects in the monorepo 2019-01-19 10:56:40 +00:00