Provides platform and dependency checks. More...

#include <cinttypes>
#include <ciso646>
#include <cstddef>

Include dependency graph for platform.hpp:

This graph shows which files directly or indirectly include this file:

Macros
#define	SEQAN3_DEPRECATED_330 [[deprecated("This will be removed in SeqAn-3.3.0; please see the documentation.")]]
	Deprecation message for SeqAn 3.3.0 release.

#define	SEQAN3_DEPRECATED_HEADER(message) SEQAN3_PRAGMA(GCC warning message)
	Deprecation message for deprecated header.

#define	SEQAN3_DISABLE_LEGACY_STD_DIAGNOSTIC
	This disables the warning you would get if -D_GLIBCXX_USE_CXX11_ABI=0 is set.

#define	SEQAN3_PRAGMA(non_string_literal) _Pragma(#non_string_literal)
	_Pragma requires a string-literal and # makes it a string

#define	SEQAN3_WITH_CEREAL 0
	Whether CEREAL support is available or not.

#define	SEQAN3_WITH_LEMON 0
	Whether Lemon support is available or not.

#define	SEQAN3_WORKAROUND_DEFAULT_CONSTRUCTIBLE_VIEW 0
	A view does not need to be default constructible. This change is first implemented in gcc12.

#define	SEQAN3_WORKAROUND_FURTHER_CONSTRAIN_FRIEND_DECLARATION 0
	gcc only: Constrain friend declarations to limit access to internals. More...

#define	SEQAN3_WORKAROUND_GCC_100139 0
	See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100139 std::views::{take, drop} do not type-erase. This is a defect within the standard lib.

#define	SEQAN3_WORKAROUND_GCC_100252 0
	See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100252 ICE in template instantiation.

#define	SEQAN3_WORKAROUND_GCC_93467 0
	See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93467.

#define	SEQAN3_WORKAROUND_GCC_96070 0
	See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96070 and https://github.com/seqan/product_backlog/issues/151.

#define	SEQAN3_WORKAROUND_GCC_99318 0
	See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99318.

#define	SEQAN3_WORKAROUND_GCC_NO_CXX11_ABI 0
	This is needed to support CentOS 7 or RHEL 7; Newer CentOS's include a more modern default-gcc version making this macro obsolete. More...

#define	SEQAN3_WORKAROUND_GCC_NON_TEMPLATE_REQUIRES 0
	https://eel.is/c++draft/range.take#view defines e.g. `constexpr auto size() requires sized_range<V>` without any template. This syntax works since gcc-10, before that a dummy `template <typename = ...>` must be used.

#define	SEQAN3_WORKAROUND_GCC_PIPEABLE_CONFIG_CONCEPT 0
	Workaround to access the static id of the configuration elements inside of the concept definition (fixed in gcc11).

#define	SEQAN3_WORKAROUND_VIEW_PERFORMANCE 1
	Warn about gcc 10.0 and gcc 10.1 Known Issues: More...

Detailed Description

Provides platform and dependency checks.

Author: Hannes Hauswedell <hannes.hauswedell AT fu-berlin.de>

Macro Definition Documentation

◆ SEQAN3_WORKAROUND_FURTHER_CONSTRAIN_FRIEND_DECLARATION

#define SEQAN3_WORKAROUND_FURTHER_CONSTRAIN_FRIEND_DECLARATION 0

gcc only: Constrain friend declarations to limit access to internals.

We have some instances where we constrain friend declarations to limit which class instance can access private information. For example

template <typename type_t>
    requires std::same_as<type_t, int>
friend class std::tuple;

would only allow std::tuple<int> to access the internals.

It seems that this is not standard behaviour and more like a gcc-only extension, as neither clang nor msvc supports it. For now we will keep this code, but it should be removed if it turns out that this is non-standard. (i.e. a newer gcc release does not support it any more)

◆ SEQAN3_WORKAROUND_GCC_NO_CXX11_ABI

#define SEQAN3_WORKAROUND_GCC_NO_CXX11_ABI 0

This is needed to support CentOS 7 or RHEL 7; Newer CentOS's include a more modern default-gcc version making this macro obsolete.

In GCC 5 there was a bigger ABI change and modern systems compile with dual ABI, but some enterprise systems (those where gcc 4 is the standard compiler) don't support dual ABI. This has the effect that even community builds of gcc are build with –disable-libstdcxx-dual-abi. Only building the compiler yourself would solve this problem.

See also: https://github.com/seqan/seqan3/issues/2244; https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html

◆ SEQAN3_WORKAROUND_VIEW_PERFORMANCE

#define SEQAN3_WORKAROUND_VIEW_PERFORMANCE 1

Warn about gcc 10.0 and gcc 10.1 Known Issues:

Performance of views, especially filter and join is currently bad, especially in I/O.

Macros

Detailed Description

Macro Definition Documentation

◆ SEQAN3_WORKAROUND_FURTHER_CONSTRAIN_FRIEND_DECLARATION

◆ SEQAN3_WORKAROUND_GCC_NO_CXX11_ABI

◆ SEQAN3_WORKAROUND_VIEW_PERFORMANCE