1 //===--- HeaderSearchOptions.h ----------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLVM_CLANG_LEX_HEADERSEARCHOPTIONS_H
11 #define LLVM_CLANG_LEX_HEADERSEARCHOPTIONS_H
13 #include "clang/Basic/LLVM.h"
14 #include "llvm/ADT/IntrusiveRefCntPtr.h"
15 #include "llvm/ADT/SetVector.h"
16 #include "llvm/ADT/StringRef.h"
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
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.
43 /// HeaderSearchOptions - Helper class for storing options related to the
44 /// initialization of the HeaderSearch object.
45 class HeaderSearchOptions : public RefCountedBase<HeaderSearchOptions> {
49 frontend::IncludeDirGroup Group;
50 unsigned IsFramework : 1;
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
55 unsigned IgnoreSysRoot : 1;
57 Entry(StringRef path, frontend::IncludeDirGroup group, bool isFramework,
59 : Path(path), Group(group), IsFramework(isFramework),
60 IgnoreSysRoot(ignoreSysRoot) {}
63 struct SystemHeaderPrefix {
64 /// A prefix to be matched against paths in \#include directives.
67 /// True if paths beginning with this prefix should be treated as system
71 SystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader)
72 : Prefix(Prefix), IsSystemHeader(IsSystemHeader) {}
75 /// If non-empty, the directory to use as a "virtual system root" for include
79 /// User specified include entries.
80 std::vector<Entry> UserEntries;
82 /// User-specified system header prefixes.
83 std::vector<SystemHeaderPrefix> SystemHeaderPrefixes;
85 /// The directory which holds the compiler resource files (builtin includes,
87 std::string ResourceDir;
89 /// \brief The directory used for the module cache.
90 std::string ModuleCachePath;
92 /// \brief Whether we should disable the use of the hash string within the
95 /// Note: Only used for testing!
96 unsigned DisableModuleHash : 1;
98 /// \brief The interval (in seconds) between pruning operations.
100 /// This operation is expensive, because it requires Clang to walk through
101 /// the directory structure of the module cache, stat()'ing and removing
104 /// The default value is large, e.g., the operation runs once a week.
105 unsigned ModuleCachePruneInterval;
107 /// \brief The time (in seconds) after which an unused module file will be
108 /// considered unused and will, therefore, be pruned.
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;
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;
120 /// Include the compiler builtin includes.
121 unsigned UseBuiltinIncludes : 1;
123 /// Include the system standard include search directories.
124 unsigned UseStandardSystemIncludes : 1;
126 /// Include the system standard C++ library include search directories.
127 unsigned UseStandardCXXIncludes : 1;
129 /// Use libc++ instead of the default libstdc++.
130 unsigned UseLibcxx : 1;
132 /// Whether header search information should be output as for -v.
133 unsigned Verbose : 1;
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) {}
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));
150 /// AddSystemHeaderPrefix - Override whether \#include directives naming a
151 /// path starting with \p Prefix should be considered as naming a system
153 void AddSystemHeaderPrefix(StringRef Prefix, bool IsSystemHeader) {
154 SystemHeaderPrefixes.push_back(SystemHeaderPrefix(Prefix, IsSystemHeader));
158 } // end namespace clang