Crypto++  8.6
Free C++ class library of cryptographic schemes
config_cxx.h
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1 // config_cxx.h - written and placed in public domain by Jeffrey Walton
2 // the bits that make up this source file are from the
3 // library's monolithic config.h.
4 
5 /// \file config_cxx.h
6 /// \brief Library configuration file
7 /// \details <tt>config_cxx.h</tt> provides defines for C++ language and
8 /// runtime library
9 /// features.
10 /// \details <tt>config.h</tt> was split into components in May 2019 to better
11 /// integrate with Autoconf and its feature tests. The splitting occurred so
12 /// users could continue to include <tt>config.h</tt> while allowing Autoconf
13 /// to write new <tt>config_asm.h</tt> and new <tt>config_cxx.h</tt> using
14 /// its feature tests.
15 /// \note You should include <tt>config.h</tt> rather than <tt>config_cxx.h</tt>
16 /// directly.
17 /// \sa <A HREF="https://github.com/weidai11/cryptopp/issues/835">Issue 835,
18 /// Make config.h more autoconf friendly</A>,
19 /// <A HREF="https://www.cryptopp.com/wiki/Configure.sh">Configure.sh script</A>
20 /// on the Crypto++ wiki
21 /// \since Crypto++ 8.3
22 
23 // Visual Studio began at VS2010, http://msdn.microsoft.com/en-us/library/hh567368%28v=vs.110%29.aspx
24 // and https://docs.microsoft.com/en-us/cpp/visual-cpp-language-conformance
25 // Intel, http://software.intel.com/en-us/articles/c0x-features-supported-by-intel-c-compiler
26 // GCC, http://gcc.gnu.org/projects/cxx0x.html
27 // Clang, http://clang.llvm.org/cxx_status.html
28 
29 #ifndef CRYPTOPP_CONFIG_CXX_H
30 #define CRYPTOPP_CONFIG_CXX_H
31 
32 #include "config_os.h"
33 #include "config_cpu.h"
34 #include "config_ver.h"
35 
36 // https://github.com/weidai11/cryptopp/issues/960
37 #include <string>
38 #include <exception>
39 
40 // You may need to force include a C++ header on Android when using STLPort
41 // to ensure _STLPORT_VERSION is defined
42 #if (defined(_MSC_VER) && _MSC_VER <= 1300) || defined(__MWERKS__) || (defined(_STLPORT_VERSION) && ((_STLPORT_VERSION < 0x450) || defined(_STLP_NO_UNCAUGHT_EXCEPT_SUPPORT)))
43 #define CRYPTOPP_DISABLE_UNCAUGHT_EXCEPTION
44 #endif
45 
46 // Ancient Crypto++ define, dating back to C++98.
47 #ifndef CRYPTOPP_DISABLE_UNCAUGHT_EXCEPTION
48 # define CRYPTOPP_UNCAUGHT_EXCEPTION_AVAILABLE 1
49 # define CRYPTOPP_CXX98_UNCAUGHT_EXCEPTION 1
50 #endif
51 
52 // Compatibility with non-clang compilers.
53 #ifndef __has_feature
54 # define __has_feature(x) 0
55 #endif
56 
57 // C++11 macro version, https://stackoverflow.com/q/7223991/608639
58 #if ((_MSC_VER >= 1600) || (__cplusplus >= 201103L)) && !defined(_STLPORT_VERSION)
59 # define CRYPTOPP_CXX11 1
60 #endif
61 
62 // Hack ahead. Apple's standard library does not have C++'s unique_ptr in C++11.
63 // We can't test for unique_ptr directly because some of the non-Apple Clangs
64 // on OS X fail the same way. However, modern standard libraries have
65 // <forward_list>, so we test for it instead. Thanks to Jonathan Wakely for
66 // devising the clever test for modern/ancient versions. TODO: test under
67 // Xcode 3, where g++ is really g++.
68 #if defined(__APPLE__) && defined(__clang__)
69 # if !(defined(__has_include) && __has_include(<forward_list>))
70 # undef CRYPTOPP_CXX11
71 # endif
72 #endif
73 
74 // C++14 macro version, https://stackoverflow.com/q/26089319/608639
75 #if defined(CRYPTOPP_CXX11) && !defined(CRYPTOPP_NO_CXX14)
76 # if ((_MSC_VER >= 1900) || (__cplusplus >= 201402L)) && !defined(_STLPORT_VERSION)
77 # define CRYPTOPP_CXX14 1
78 # endif
79 #endif
80 
81 // C++17 macro version, https://stackoverflow.com/q/38456127/608639
82 #if defined(CRYPTOPP_CXX14) && !defined(CRYPTOPP_NO_CXX17)
83 # if ((_MSC_VER >= 1900) || (__cplusplus >= 201703L)) && !defined(_STLPORT_VERSION)
84 # define CRYPTOPP_CXX17 1
85 # endif
86 #endif
87 
88 // ***************** C++11 and above ********************
89 
90 #if defined(CRYPTOPP_CXX11)
91 
92 // atomics: MS at VS2012 (17.00); GCC at 4.4; Clang at 3.1/3.2; Intel 13.0; SunCC 5.14.
93 #if (CRYPTOPP_MSC_VERSION >= 1700) || __has_feature(cxx_atomic) || \
94  (__INTEL_COMPILER >= 1300) || (CRYPTOPP_GCC_VERSION >= 40400) || (__SUNPRO_CC >= 0x5140)
95 # define CRYPTOPP_CXX11_ATOMIC 1
96 #endif // atomics
97 
98 // synchronization: MS at VS2012 (17.00); GCC at 4.4; Clang at 3.3; Xcode 5.0; Intel 12.0; SunCC 5.13.
99 // TODO: verify Clang and Intel versions; find __has_feature(x) extension for Clang
100 #if (CRYPTOPP_MSC_VERSION >= 1700) || (CRYPTOPP_LLVM_CLANG_VERSION >= 30300) || \
101  (CRYPTOPP_APPLE_CLANG_VERSION >= 50000) || (__INTEL_COMPILER >= 1200) || \
102  (CRYPTOPP_GCC_VERSION >= 40400) || (__SUNPRO_CC >= 0x5130)
103 // Hack ahead. New GCC compilers like GCC 6 on AIX 7.0 or earlier as well as original MinGW
104 // don't have the synchronization gear. However, Wakely's test used for Apple does not work
105 // on the GCC/AIX combination. Another twist is we need other stuff from C++11,
106 // like no-except destructors. Dumping preprocessors shows the following may
107 // apply: http://stackoverflow.com/q/14191566/608639.
108 # include <cstddef>
109 # if !defined(__GLIBCXX__) || defined(_GLIBCXX_HAS_GTHREADS)
110 # define CRYPTOPP_CXX11_SYNCHRONIZATION 1
111 # endif
112 #endif // synchronization
113 
114 // Dynamic Initialization and Destruction with Concurrency ("Magic Statics")
115 // MS at VS2015 with Vista (19.00); GCC at 4.3; LLVM Clang at 2.9; Apple Clang at 4.0; Intel 11.1; SunCC 5.13.
116 // Microsoft's implementation only works for Vista and above, so its further
117 // limited. http://connect.microsoft.com/VisualStudio/feedback/details/1789709
118 // Clang may not support this as early as we indicate. Also see https://bugs.llvm.org/show_bug.cgi?id=47012.
119 #if (__cpp_threadsafe_static_init >= 200806) || \
120  (CRYPTOPP_MSC_VERSION >= 1900) && ((WINVER >= 0x0600) || (_WIN32_WINNT >= 0x0600)) || \
121  (CRYPTOPP_LLVM_CLANG_VERSION >= 20900) || (CRYPTOPP_APPLE_CLANG_VERSION >= 40000) || \
122  (__INTEL_COMPILER >= 1110) || (CRYPTOPP_GCC_VERSION >= 40300) || (__SUNPRO_CC >= 0x5130)
123 # define CRYPTOPP_CXX11_STATIC_INIT 1
124 #endif // Dynamic Initialization compilers
125 
126 // deleted functions: MS at VS2013 (18.00); GCC at 4.3; Clang at 2.9; Intel 12.1; SunCC 5.13.
127 #if (CRYPTOPP_MSC_VERSION >= 1800) || (CRYPTOPP_LLVM_CLANG_VERSION >= 20900) || \
128  (CRYPTOPP_APPLE_CLANG_VERSION >= 40000) || (__INTEL_COMPILER >= 1210) || \
129  (CRYPTOPP_GCC_VERSION >= 40300) || (__SUNPRO_CC >= 0x5130)
130 # define CRYPTOPP_CXX11_DELETED_FUNCTIONS 1
131 #endif // deleted functions
132 
133 // alignof/alignas: MS at VS2015 (19.00); GCC at 4.8; Clang at 3.0; Intel 15.0; SunCC 5.13.
134 #if (CRYPTOPP_MSC_VERSION >= 1900) || __has_feature(cxx_alignas) || \
135  (__INTEL_COMPILER >= 1500) || (CRYPTOPP_GCC_VERSION >= 40800) || (__SUNPRO_CC >= 0x5130)
136 # define CRYPTOPP_CXX11_ALIGNAS 1
137 #endif // alignas
138 
139 // alignof: MS at VS2015 (19.00); GCC at 4.5; Clang at 2.9; Intel 15.0; SunCC 5.13.
140 #if (CRYPTOPP_MSC_VERSION >= 1900) || __has_feature(cxx_alignof) || \
141  (__INTEL_COMPILER >= 1500) || (CRYPTOPP_GCC_VERSION >= 40500) || (__SUNPRO_CC >= 0x5130)
142 # define CRYPTOPP_CXX11_ALIGNOF 1
143 #endif // alignof
144 
145 // initializer lists: MS at VS2013 (18.00); GCC at 4.4; Clang at 3.1; Intel 14.0; SunCC 5.13.
146 #if (CRYPTOPP_MSC_VERSION >= 1800) || (CRYPTOPP_LLVM_CLANG_VERSION >= 30100) || \
147  (CRYPTOPP_APPLE_CLANG_VERSION >= 40000) || (__INTEL_COMPILER >= 1400) || \
148  (CRYPTOPP_GCC_VERSION >= 40400) || (__SUNPRO_CC >= 0x5130)
149 # define CRYPTOPP_CXX11_INITIALIZER_LIST 1
150 #endif // alignas
151 
152 // lambdas: MS at VS2012 (17.00); GCC at 4.9; Clang at 3.3; Intel 12.0; SunCC 5.14.
153 #if (CRYPTOPP_MSC_VERSION >= 1700) || __has_feature(cxx_lambdas) || \
154  (__INTEL_COMPILER >= 1200) || (CRYPTOPP_GCC_VERSION >= 40900) || (__SUNPRO_CC >= 0x5140)
155 # define CRYPTOPP_CXX11_LAMBDA 1
156 #endif // lambdas
157 
158 // noexcept: MS at VS2015 (19.00); GCC at 4.6; Clang at 3.0; Intel 14.0; SunCC 5.13.
159 #if (CRYPTOPP_MSC_VERSION >= 1900) || __has_feature(cxx_noexcept) || \
160  (__INTEL_COMPILER >= 1400) || (CRYPTOPP_GCC_VERSION >= 40600) || (__SUNPRO_CC >= 0x5130)
161 # define CRYPTOPP_CXX11_NOEXCEPT 1
162 #endif // noexcept compilers
163 
164 // variadic templates: MS at VS2013 (18.00); GCC at 4.3; Clang at 2.9; Intel 12.1; SunCC 5.13.
165 #if (__cpp_variadic_templates >= 200704) || __has_feature(cxx_variadic_templates) || \
166  (CRYPTOPP_MSC_VERSION >= 1800) || (__INTEL_COMPILER >= 1210) || \
167  (CRYPTOPP_GCC_VERSION >= 40300) || (__SUNPRO_CC >= 0x5130)
168 # define CRYPTOPP_CXX11_VARIADIC_TEMPLATES 1
169 #endif // variadic templates
170 
171 // constexpr: MS at VS2015 (19.00); GCC at 4.6; Clang at 3.1; Intel 16.0; SunCC 5.13.
172 // Intel has mis-supported the feature since at least ICPC 13.00
173 #if (__cpp_constexpr >= 200704) || __has_feature(cxx_constexpr) || \
174  (CRYPTOPP_MSC_VERSION >= 1900) || (__INTEL_COMPILER >= 1600) || \
175  (CRYPTOPP_GCC_VERSION >= 40600) || (__SUNPRO_CC >= 0x5130)
176 # define CRYPTOPP_CXX11_CONSTEXPR 1
177 #endif // constexpr compilers
178 
179 // strong typed enums: MS at VS2012 (17.00); GCC at 4.4; Clang at 3.3; Intel 14.0; SunCC 5.12.
180 // Mircorosft and Intel had partial support earlier, but we require full support.
181 #if (CRYPTOPP_MSC_VERSION >= 1700) || __has_feature(cxx_strong_enums) || \
182  (__INTEL_COMPILER >= 1400) || (CRYPTOPP_GCC_VERSION >= 40400) || (__SUNPRO_CC >= 0x5120)
183 # define CRYPTOPP_CXX11_STRONG_ENUM 1
184 #endif // constexpr compilers
185 
186 // nullptr_t: MS at VS2010 (16.00); GCC at 4.6; Clang at 3.3; Intel 10.0; SunCC 5.13.
187 #if (CRYPTOPP_MSC_VERSION >= 1600) || __has_feature(cxx_nullptr) || \
188  (__INTEL_COMPILER >= 1000) || (CRYPTOPP_GCC_VERSION >= 40600) || \
189  (__SUNPRO_CC >= 0x5130) || defined(__IBMCPP_NULLPTR)
190 # define CRYPTOPP_CXX11_NULLPTR 1
191 #endif // nullptr_t compilers
192 
193 #endif // CRYPTOPP_CXX11
194 
195 // ***************** C++14 and above ********************
196 
197 #if defined(CRYPTOPP_CXX14)
198 
199 // Extended static_assert with one argument
200 // Microsoft cannot handle the single argument static_assert as of VS2019 (cl.exe 19.00)
201 #if (__cpp_static_assert >= 201411)
202 # define CRYPTOPP_CXX17_STATIC_ASSERT 1
203 #endif // static_assert
204 
205 #endif
206 
207 // ***************** C++17 and above ********************
208 
209 // C++17 is available
210 #if defined(CRYPTOPP_CXX17)
211 
212 // C++17 uncaught_exceptions: MS at VS2015 (19.00); GCC at 6.0; Clang at 3.5; Intel 18.0.
213 // Clang and __EXCEPTIONS see http://releases.llvm.org/3.6.0/tools/clang/docs/ReleaseNotes.html
214 // Also see https://github.com/weidai11/cryptopp/issues/980. I'm not sure what
215 // to do when the compiler defines __cpp_lib_uncaught_exceptions but the platform
216 // does not support std::uncaught_exceptions. What was Apple thinking???
217 #if defined(__clang__)
218 # if __EXCEPTIONS && __has_feature(cxx_exceptions)
219 # if __cpp_lib_uncaught_exceptions >= 201411L
220 # define CRYPTOPP_CXX17_UNCAUGHT_EXCEPTIONS 1
221 # endif
222 # endif
223 #elif (CRYPTOPP_MSC_VERSION >= 1900) || (__INTEL_COMPILER >= 1800) || \
224  (CRYPTOPP_GCC_VERSION >= 60000) || (__cpp_lib_uncaught_exceptions >= 201411L)
225 # define CRYPTOPP_CXX17_UNCAUGHT_EXCEPTIONS 1
226 #endif // uncaught_exceptions compilers
227 
228 #endif // CRYPTOPP_CXX17
229 
230 // ***************** C++ fixups ********************
231 
232 #if defined(CRYPTOPP_CXX11_NOEXCEPT)
233 # define CRYPTOPP_THROW noexcept(false)
234 # define CRYPTOPP_NO_THROW noexcept(true)
235 #else
236 # define CRYPTOPP_THROW
237 # define CRYPTOPP_NO_THROW
238 #endif // CRYPTOPP_CXX11_NOEXCEPT
239 
240 // Hack... C++11 nullptr_t type safety and analysis
241 #if defined(CRYPTOPP_CXX11_NULLPTR) && !defined(NULLPTR)
242 # define NULLPTR nullptr
243 #elif !defined(NULLPTR)
244 # define NULLPTR NULL
245 #endif // CRYPTOPP_CXX11_NULLPTR
246 
247 #endif // CRYPTOPP_CONFIG_CXX_H
config_cpu.h
Library configuration file.
config_os.h
Library configuration file.
config_ver.h
Library configuration file.