| /* Detect Clang Version |
| * Created by Evan Nemerson <evan@nemerson.com> |
| * |
| * To the extent possible under law, the author(s) have dedicated all |
| * copyright and related and neighboring rights to this software to |
| * the public domain worldwide. This software is distributed without |
| * any warranty. |
| * |
| * For details, see <http://creativecommons.org/publicdomain/zero/1.0/>. |
| * SPDX-License-Identifier: CC0-1.0 |
| */ |
| |
| /* This file was originally part of SIMDe |
| * (<https://github.com/simd-everywhere/simde>). You're free to do with it as |
| * you please, but I do have a few small requests: |
| * |
| * * If you make improvements, please submit them back to SIMDe |
| * (at <https://github.com/simd-everywhere/simde/issues>) so others can |
| * benefit from them. |
| * * Please keep a link to SIMDe intact so people know where to submit |
| * improvements. |
| * * If you expose it publicly, please change the SIMDE_ prefix to |
| * something specific to your project. |
| * |
| * The version numbers clang exposes (in the ___clang_major__, |
| * __clang_minor__, and __clang_patchlevel__ macros) are unreliable. |
| * Vendors such as Apple will define these values to their version |
| * numbers; for example, "Apple Clang 4.0" is really clang 3.1, but |
| * __clang_major__ and __clang_minor__ are defined to 4 and 0 |
| * respectively, instead of 3 and 1. |
| * |
| * The solution is *usually* to use clang's feature detection macros |
| * (<https://clang.llvm.org/docs/LanguageExtensions.html#feature-checking-macros>) |
| * to determine if the feature you're interested in is available. This |
| * generally works well, and it should probably be the first thing you |
| * try. Unfortunately, it's not possible to check for everything. In |
| * particular, compiler bugs. |
| * |
| * This file just uses the feature checking macros to detect features |
| * added in specific versions of clang to identify which version of |
| * clang the compiler is based on. |
| * |
| * Right now it only goes back to 3.6, but I'm happy to accept patches |
| * to go back further. And, of course, newer versions are welcome if |
| * they're not already present, and if you find a way to detect a point |
| * release that would be great, too! |
| */ |
| |
| #if !defined(SIMDE_DETECT_CLANG_H) |
| #define SIMDE_DETECT_CLANG_H 1 |
| |
| /* Attempt to detect the upstream clang version number. I usually only |
| * worry about major version numbers (at least for 4.0+), but if you |
| * need more resolution I'm happy to accept patches that are able to |
| * detect minor versions as well. That said, you'll probably have a |
| * hard time with detection since AFAIK most minor releases don't add |
| * anything we can detect. Updated based on |
| * https://github.com/google/highway/blob/438c705a295176b96a50336527bb3e7ea365ffac/hwy/detect_compiler_arch.h#L73 |
| * - would welcome patches/updates there as well. |
| */ |
| |
| #if defined(__clang__) && !defined(SIMDE_DETECT_CLANG_VERSION) |
| # if __has_warning("-Wlifetime-safety") |
| # define SIMDE_DETECT_CLANG_VERSION 230000 |
| # elif __has_warning("-Wunsafe-buffer-usage-in-format-attr-call") |
| # define SIMDE_DETECT_CLANG_VERSION 220100 |
| # elif __has_builtin(__builtin_elementwise_fshl) |
| # define SIMDE_DETECT_CLANG_VERSION 220000 |
| # elif __has_warning("-Wdefault-const-init-var") || __has_builtin(__builtin_structured_binding_size) |
| # if __clang_major__ == 21 && __clang_minor__ >= 1 && __clang_patchlevel__ >= 1 |
| # define SIMDE_DETECT_CLANG_VERSION 210101 // for SIMDE_BUG_CLANG_179057 |
| # else |
| # define SIMDE_DETECT_CLANG_VERSION 210000 |
| # endif |
| # elif __has_warning("-Warray-compare-cxx26") |
| # define SIMDE_DETECT_CLANG_VERSION 200000 |
| # elif __has_warning("-Wmissing-designated-field-initializers") |
| # define SIMDE_DETECT_CLANG_VERSION 190000 |
| # elif __has_warning("-Woverriding-option") |
| # define SIMDE_DETECT_CLANG_VERSION 180000 |
| # elif __has_attribute(unsafe_buffer_usage) // no new warnings in 17.0 |
| # define SIMDE_DETECT_CLANG_VERSION 170000 |
| # elif __has_attribute(nouwtable) // no new warnings in 16.0 |
| # define SIMDE_DETECT_CLANG_VERSION 160000 |
| # elif __has_warning("-Warray-parameter") |
| # define SIMDE_DETECT_CLANG_VERSION 150000 |
| # elif __has_warning("-Wbitwise-instead-of-logical") |
| # define SIMDE_DETECT_CLANG_VERSION 140000 |
| # elif __has_warning("-Waix-compat") |
| # define SIMDE_DETECT_CLANG_VERSION 130000 |
| # elif __has_warning("-Wformat-insufficient-args") |
| # define SIMDE_DETECT_CLANG_VERSION 120000 |
| # elif __has_warning("-Wimplicit-const-int-float-conversion") |
| # define SIMDE_DETECT_CLANG_VERSION 110000 |
| # elif __has_warning("-Wmisleading-indentation") |
| # define SIMDE_DETECT_CLANG_VERSION 100000 |
| # elif defined(__FILE_NAME__) |
| # define SIMDE_DETECT_CLANG_VERSION 90000 |
| # elif __has_warning("-Wextra-semi-stmt") || __has_builtin(__builtin_rotateleft32) |
| # define SIMDE_DETECT_CLANG_VERSION 80000 |
| // For reasons unknown, Xcode 10.3 (Apple LLVM version 10.0.1) is apparently |
| // based on Clang 7, but does not support the warning we test. |
| // See https://en.wikipedia.org/wiki/Xcode#Toolchain_versions and |
| // https://trac.macports.org/wiki/XcodeVersionInfo. |
| # elif __has_warning("-Wc++98-compat-extra-semi") || \ |
| (defined(__apple_build_version__) && __apple_build_version__ >= 10010000) |
| # define SIMDE_DETECT_CLANG_VERSION 70000 |
| # elif __has_warning("-Wpragma-pack") |
| # define SIMDE_DETECT_CLANG_VERSION 60000 |
| # elif __has_warning("-Wbitfield-enum-conversion") |
| # define SIMDE_DETECT_CLANG_VERSION 50000 |
| # elif __has_attribute(diagnose_if) |
| # define SIMDE_DETECT_CLANG_VERSION 40000 |
| # elif __has_warning("-Wcomma") |
| # define SIMDE_DETECT_CLANG_VERSION 39000 |
| # elif __has_warning("-Wdouble-promotion") |
| # define SIMDE_DETECT_CLANG_VERSION 38000 |
| # elif __has_warning("-Wshift-negative-value") |
| # define SIMDE_DETECT_CLANG_VERSION 37000 |
| # elif __has_warning("-Wambiguous-ellipsis") |
| # define SIMDE_DETECT_CLANG_VERSION 36000 |
| # else |
| # define SIMDE_DETECT_CLANG_VERSION 1 |
| # endif |
| #endif /* defined(__clang__) && !defined(SIMDE_DETECT_CLANG_VERSION) */ |
| |
| /* The SIMDE_DETECT_CLANG_VERSION_CHECK macro is pretty |
| * straightforward; it returns true if the compiler is a derivative |
| * of clang >= the specified version. |
| * |
| * Since this file is often (primarily?) useful for working around bugs |
| * it is also helpful to have a macro which returns true if only if the |
| * compiler is a version of clang *older* than the specified version to |
| * make it a bit easier to ifdef regions to add code for older versions, |
| * such as pragmas to disable a specific warning. */ |
| |
| #if defined(SIMDE_DETECT_CLANG_VERSION) |
| # define SIMDE_DETECT_CLANG_VERSION_CHECK(major, minor, revision) (SIMDE_DETECT_CLANG_VERSION >= ((major * 10000) + (minor * 100) + (revision))) |
| # define SIMDE_DETECT_CLANG_VERSION_NOT(major, minor, revision) (SIMDE_DETECT_CLANG_VERSION < ((major * 10000) + (minor * 100) + (revision))) |
| #else |
| # define SIMDE_DETECT_CLANG_VERSION_CHECK(major, minor, revision) (0) |
| # define SIMDE_DETECT_CLANG_VERSION_NOT(major, minor, revision) (0) |
| #endif |
| |
| #endif /* !defined(SIMDE_DETECT_CLANG_H) */ |
