/* Detect Clang Version * Created by Evan Nemerson * * 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 . * SPDX-License-Identifier: CC0-1.0 */ /* This file was originally part of 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 ) 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 * () * 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_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("-Wwaix-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 * 1000) + (revision))) # define SIMDE_DETECT_CLANG_VERSION_NOT(major, minor, revision) (SIMDE_DETECT_CLANG_VERSION < ((major * 10000) + (minor * 1000) + (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) */