tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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policy_checks.h (4321B)

      1 // Copyright 2017 The Abseil Authors.
      2 //
      3 // Licensed under the Apache License, Version 2.0 (the "License");
      4 // you may not use this file except in compliance with the License.
      5 // You may obtain a copy of the License at
      6 //
      7 //      https://www.apache.org/licenses/LICENSE-2.0
      8 //
      9 // Unless required by applicable law or agreed to in writing, software
     10 // distributed under the License is distributed on an "AS IS" BASIS,
     11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     12 // See the License for the specific language governing permissions and
     13 // limitations under the License.
     14 //
     15 // -----------------------------------------------------------------------------
     16 // File: policy_checks.h
     17 // -----------------------------------------------------------------------------
     18 //
     19 // This header enforces a minimum set of policies at build time, such as the
     20 // supported compiler and library versions. Unsupported configurations are
     21 // reported with `#error`. This enforcement is best effort, so successfully
     22 // compiling this header does not guarantee a supported configuration.
     23 
     24 // SKIP_ABSL_INLINE_NAMESPACE_CHECK
     25 
     26 #ifndef ABSL_BASE_POLICY_CHECKS_H_
     27 #define ABSL_BASE_POLICY_CHECKS_H_
     28 
     29 // Included for the __GLIBC_PREREQ macro used below.
     30 #include <limits.h>
     31 
     32 // Included for the _STLPORT_VERSION macro used below.
     33 #if defined(__cplusplus)
     34 #include <cstddef>
     35 #endif
     36 
     37 // -----------------------------------------------------------------------------
     38 // Operating System Check
     39 // -----------------------------------------------------------------------------
     40 
     41 #if defined(__CYGWIN__)
     42 #error "Cygwin is not supported."
     43 #endif
     44 
     45 // -----------------------------------------------------------------------------
     46 // Toolchain Check
     47 // -----------------------------------------------------------------------------
     48 
     49 // We support Visual Studio 2019 (MSVC++ 16.0) and later.
     50 // This minimum will go up.
     51 #if defined(_MSC_VER) && _MSC_VER < 1920 && !defined(__clang__)
     52 #error "This package requires Visual Studio 2019 (MSVC++ 16.0) or higher."
     53 #endif
     54 
     55 // We support GCC 7 and later.
     56 // This minimum will go up.
     57 #if defined(__GNUC__) && !defined(__clang__)
     58 #if __GNUC__ < 7
     59 #error "This package requires GCC 7 or higher."
     60 #endif
     61 #endif
     62 
     63 // We support Apple Xcode clang 4.2.1 (version 421.11.65) and later.
     64 // This corresponds to Apple Xcode version 4.5.
     65 // This minimum will go up.
     66 #if defined(__apple_build_version__) && __apple_build_version__ < 4211165
     67 #error "This package requires __apple_build_version__ of 4211165 or higher."
     68 #endif
     69 
     70 // -----------------------------------------------------------------------------
     71 // C++ Version Check
     72 // -----------------------------------------------------------------------------
     73 
     74 // Enforce C++17 as the minimum.
     75 #if defined(_MSVC_LANG)
     76 #if _MSVC_LANG < 201703L
     77 #error "C++ versions less than C++17 are not supported."
     78 #endif  // _MSVC_LANG < 201703L
     79 #elif defined(__cplusplus)
     80 #if __cplusplus < 201703L
     81 #error "C++ versions less than C++17 are not supported."
     82 #endif  // __cplusplus < 201703L
     83 #endif
     84 
     85 // -----------------------------------------------------------------------------
     86 // Standard Library Check
     87 // -----------------------------------------------------------------------------
     88 
     89 #if defined(_STLPORT_VERSION)
     90 #error "STLPort is not supported."
     91 #endif
     92 
     93 // -----------------------------------------------------------------------------
     94 // `char` Size Check
     95 // -----------------------------------------------------------------------------
     96 
     97 // Abseil currently assumes CHAR_BIT == 8. If you would like to use Abseil on a
     98 // platform where this is not the case, please provide us with the details about
     99 // your platform so we can consider relaxing this requirement.
    100 #if CHAR_BIT != 8
    101 #error "Abseil assumes CHAR_BIT == 8."
    102 #endif
    103 
    104 // -----------------------------------------------------------------------------
    105 // `int` Size Check
    106 // -----------------------------------------------------------------------------
    107 
    108 // Abseil currently assumes that an int is 4 bytes. If you would like to use
    109 // Abseil on a platform where this is not the case, please provide us with the
    110 // details about your platform so we can consider relaxing this requirement.
    111 #if INT_MAX < 2147483647
    112 #error "Abseil assumes that int is at least 4 bytes. "
    113 #endif
    114 
    115 #endif  // ABSL_BASE_POLICY_CHECKS_H_