1//===--- HeaderSearchOptions.h ----------------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef LLVM_CLANG_LEX_HEADERSEARCHOPTIONS_H 11#define LLVM_CLANG_LEX_HEADERSEARCHOPTIONS_H 12 13#include "clang/Basic/LLVM.h" 14#include "llvm/ADT/IntrusiveRefCntPtr.h" 15#include "llvm/ADT/SetVector.h" 16#include "llvm/ADT/StringRef.h" 17#include <string> 18#include <vector> 19 20namespace clang { 21 22namespace frontend { 23 /// IncludeDirGroup - Identifiers the group a include entry belongs to, which 24 /// represents its relative positive in the search list. A \#include of a "" 25 /// path starts at the -iquote group, then searches the Angled group, then 26 /// searches the system group, etc. 27 enum IncludeDirGroup { 28 Quoted = 0, ///< '\#include ""' paths, added by 'gcc -iquote'. 29 Angled, ///< Paths for '\#include <>' added by '-I'. 30 IndexHeaderMap, ///< Like Angled, but marks header maps used when 31 /// building frameworks. 32 System, ///< Like Angled, but marks system directories. 33 ExternCSystem, ///< Like System, but headers are implicitly wrapped in 34 /// extern "C". 35 CSystem, ///< Like System, but only used for C. 36 CXXSystem, ///< Like System, but only used for C++. 37 ObjCSystem, ///< Like System, but only used for ObjC. 38 ObjCXXSystem, ///< Like System, but only used for ObjC++. 39 After ///< Like System, but searched after the system directories. 40 }; 41} 42 43/// HeaderSearchOptions - Helper class for storing options related to the 44/// initialization of the HeaderSearch object. 45class HeaderSearchOptions : public RefCountedBase<HeaderSearchOptions> { 46public: 47 struct Entry { 48 std::string Path; 49 frontend::IncludeDirGroup Group; 50 unsigned IsFramework : 1; 51 52 /// IgnoreSysRoot - This is false if an absolute path should be treated 53 /// relative to the sysroot, or true if it should always be the absolute 54 /// path. 55 unsigned IgnoreSysRoot : 1; 56 57 Entry(StringRef path, frontend::IncludeDirGroup group, bool isFramework, 58 bool ignoreSysRoot) 59 : Path(path), Group(group), IsFramework(isFramework), 60 IgnoreSysRoot(ignoreSysRoot) {} 61 }; 62 63 struct SystemHeaderPrefix { 64 /// A prefix to be matched against paths in \#include directives. 65 std::string Prefix; 66 67 /// True if paths beginning with this prefix should be treated as system 68 /// headers. 69 bool IsSystemHeader; 70 71 SystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader) 72 : Prefix(Prefix), IsSystemHeader(IsSystemHeader) {} 73 }; 74 75 /// If non-empty, the directory to use as a "virtual system root" for include 76 /// paths. 77 std::string Sysroot; 78 79 /// User specified include entries. 80 std::vector<Entry> UserEntries; 81 82 /// User-specified system header prefixes. 83 std::vector<SystemHeaderPrefix> SystemHeaderPrefixes; 84 85 /// The directory which holds the compiler resource files (builtin includes, 86 /// etc.). 87 std::string ResourceDir; 88 89 /// \brief The directory used for the module cache. 90 std::string ModuleCachePath; 91 92 /// \brief Whether we should disable the use of the hash string within the 93 /// module cache. 94 /// 95 /// Note: Only used for testing! 96 unsigned DisableModuleHash : 1; 97 98 /// \brief The interval (in seconds) between pruning operations. 99 /// 100 /// This operation is expensive, because it requires Clang to walk through 101 /// the directory structure of the module cache, stat()'ing and removing 102 /// files. 103 /// 104 /// The default value is large, e.g., the operation runs once a week. 105 unsigned ModuleCachePruneInterval; 106 107 /// \brief The time (in seconds) after which an unused module file will be 108 /// considered unused and will, therefore, be pruned. 109 /// 110 /// When the module cache is pruned, any module file that has not been 111 /// accessed in this many seconds will be removed. The default value is 112 /// large, e.g., a month, to avoid forcing infrequently-used modules to be 113 /// regenerated often. 114 unsigned ModuleCachePruneAfter; 115 116 /// \brief The set of macro names that should be ignored for the purposes 117 /// of computing the module hash. 118 llvm::SetVector<std::string> ModulesIgnoreMacros; 119 120 /// Include the compiler builtin includes. 121 unsigned UseBuiltinIncludes : 1; 122 123 /// Include the system standard include search directories. 124 unsigned UseStandardSystemIncludes : 1; 125 126 /// Include the system standard C++ library include search directories. 127 unsigned UseStandardCXXIncludes : 1; 128 129 /// Use libc++ instead of the default libstdc++. 130 unsigned UseLibcxx : 1; 131 132 /// Whether header search information should be output as for -v. 133 unsigned Verbose : 1; 134 135public: 136 HeaderSearchOptions(StringRef _Sysroot = "/") 137 : Sysroot(_Sysroot), DisableModuleHash(0), 138 ModuleCachePruneInterval(7*24*60*60), 139 ModuleCachePruneAfter(31*24*60*60), 140 UseBuiltinIncludes(true), 141 UseStandardSystemIncludes(true), UseStandardCXXIncludes(true), 142 UseLibcxx(false), Verbose(false) {} 143 144 /// AddPath - Add the \p Path path to the specified \p Group list. 145 void AddPath(StringRef Path, frontend::IncludeDirGroup Group, 146 bool IsFramework, bool IgnoreSysRoot) { 147 UserEntries.push_back(Entry(Path, Group, IsFramework, IgnoreSysRoot)); 148 } 149 150 /// AddSystemHeaderPrefix - Override whether \#include directives naming a 151 /// path starting with \p Prefix should be considered as naming a system 152 /// header. 153 void AddSystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader) { 154 SystemHeaderPrefixes.push_back(SystemHeaderPrefix(Prefix, IsSystemHeader)); 155 } 156}; 157 158} // end namespace clang 159 160#endif 161