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Diffstat (limited to 'butl/target-triplet')
| -rw-r--r-- | butl/target-triplet | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/butl/target-triplet b/butl/target-triplet deleted file mode 100644 index 284b47f..0000000 --- a/butl/target-triplet +++ /dev/null @@ -1,155 +0,0 @@ -// file : butl/target-triplet -*- C++ -*- -// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd -// license : MIT; see accompanying LICENSE file - -#ifndef BUTL_TARGET_TRIPLET -#define BUTL_TARGET_TRIPLET - -#include <string> -#include <ostream> - -#include <butl/export> - -namespace butl -{ - // This is the ubiquitous 'target triplet' that loosely has the CPU-VENDOR-OS - // form which, these days, quite often takes the CPU-VENDOR-OS-ABI form. Plus - // some fields can sometimes be omitted. This looseness makes it hard to base - // any kind of decisions on the triplet without canonicalizing it and then - // splitting it into components. The way we are going to split it is like - // this: - // - // CPU - // - // This one is reasonably straightforward. Note that we always expect at - // least two components with the first being the CPU. In other words, we - // don't try to guess what just 'mingw32' might mean like config.sub does. - // - // VENDOR - // - // This can be a machine vendor as in i686-apple-darwin8, a toolchain vendor - // as in i686-lfs-linux-gnu, or something else as in arm-softfloat-linux-gnu. - // Just as we think vendor is pretty irrelevant and can be ignored, comes - // MinGW-W64 and calls itself *-w64-mingw32. While it is tempting to - // attribute w64 to OS-ABI, the MinGW-W64 folks insist it is a (presumably - // toolchain) vendor. - // - // Another example where the vendor seems to be reused for something else - // entirely is the Intel's MIC architecture: x86_64-k1om-linux. - // - // To make things more regular we also convert the information-free vendor - // names 'pc', 'unknown' and 'none' to the empty name. - // - // OS/KERNEL-OS/OS-ABI - // - // This is where things get really messy and instead of trying to guess, we - // call the entire thing SYSTEM. Except, in certain cases, we factor out the - // trailing version, again, to make SYSTEM easier to compare to. For example, - // *-darwin14.5.0 becomes 'darwin' and '14.5.0'. - // - // Again, to make things more regular, if the first component in SYSTEM is - // none, then it is removed (so *-none-eabi becomes just 'eabi'). - // - // Values for two-component systems (e.g., linux-gnu) that don't specify - // VENDOR explicitly are inherently ambiguous: is 'linux' VENDOR or part of - // SYSTEM? The only way to handle this is to recognize their specific names - // as special cases and this is what we do for some of the more common - // ones. The alternative would be to first run such names through config.sub - // which adds explicit VENDOR and this could be a reasonable fallback - // strategy for (presumably less common) cases were we don't split things - // correctly. - // - // Note also that the version splitting is only done for certain commonly- - // used targets. - // - // Some examples of canonicalization and splitting: - // - // x86_64-apple-darwin14.5.0 x86_64 apple darwin 14.5.0 - // x86_64-unknown-freebsd10.2 x86_64 freebsd 10.2 - // i686-elf i686 elf - // arm-eabi arm eabi - // arm-none-eabi arm eabi - // arm-none-linux-gnueabi arm linux-gnueabi - // arm-softfloat-linux-gnu arm softfloat linux-gnu - // i686-pc-mingw32 i686 mingw32 - // i686-w64-mingw32 i686 w64 mingw32 - // i686-lfs-linux-gnu i686 lfs linux-gnu - // x86_64-unknown-linux-gnu x86_64 linux-gnu - // x86_64-linux-gnux32 x86_64 linux-gnux32 - // x86_64-microsoft-win32-msvc14.0 x86_64 microsoft win32-msvc 14.0 - // - // Similar to version splitting, for certain commonly-used targets we also - // derive the "target class" which can be used as a shorthand, more - // convenient way to identify a targets. If the target is not recognized, - // then the special 'other' value is used. Currently the following classes - // are recognized: - // - // linux *-*-linux-* - // macos *-apple-darwin* - // bsd *-*-(freebsd|openbsd|netbsd)* - // windows *-*-win32-* | *-*-mingw32 - // - // References: - // - // 1. The libtool repository contains the PLATFORM file that lists many known - // triplets. - // - // 2. LLVM has the Triple class with similar goals. - // - struct LIBBUTL_EXPORT target_triplet - { - std::string cpu; - std::string vendor; - std::string system; - std::string version; - std::string class_; - - // Assemble and returning the canonical (i.e., the one we round-trip) - // target triplet string. - // - std::string - string () const; - - bool - empty () const {return cpu.empty ();} - - int - compare (const target_triplet& y) const - { - int r; - return - (r = cpu.compare (y.cpu)) != 0 ? r : - (r = vendor.compare (y.vendor)) != 0 ? r : - (r = system.compare (y.system)) != 0 ? r : - ( version.compare (y.version)); - } - - // Parse the triplet throw std::invalid_argument if the triplet is not - // recognizable. - // - explicit - target_triplet (const std::string&); - - target_triplet () = default; - }; - - inline bool - operator== (const target_triplet& x, const target_triplet& y) - { - return x.compare (y) == 0; - } - - inline bool - operator!= (const target_triplet& x, const target_triplet& y) - { - return !(x == y); - } - - inline std::ostream& - operator<< (std::ostream& o, const target_triplet& x) - { - return o << x.string (); - } -} - -#endif // BUTL_TARGET_TRIPLET |