1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
//===--- DependencyFile.cpp - Generate dependency file --------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This code generates dependency files.
//
//===----------------------------------------------------------------------===//
#include "clang.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/PPCallbacks.h"
#include "clang/Lex/DirectoryLookup.h"
#include "clang/Basic/SourceLocation.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/System/Path.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include <fstream>
#include <string>
using namespace clang;
namespace {
class VISIBILITY_HIDDEN DependencyFileCallback : public PPCallbacks {
llvm::StringSet<> Files;
const Preprocessor *PP;
std::ofstream OS;
const std::string &InputFile;
std::string Target;
private:
bool FileMatchesDepCriteria(const char *Filename,
SrcMgr::CharacteristicKind FileType);
void OutputDependencyFile();
public:
DependencyFileCallback(const Preprocessor *PP,
const std::string &InputFile,
const std::string &DepFile,
const std::string &Target,
const char *&ErrStr);
~DependencyFileCallback();
virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason,
SrcMgr::CharacteristicKind FileType);
};
}
static const char *DependencyFileExt = "d";
static const char *ObjectFileExt = "o";
//===----------------------------------------------------------------------===//
// Dependency file options
//===----------------------------------------------------------------------===//
static llvm::cl::opt<bool>
GenerateDependencyFile("MD",
llvm::cl::desc("Generate dependency for main source file "
"(system headers included)"));
static llvm::cl::opt<bool>
GenerateDependencyFileNoSysHeaders("MMD",
llvm::cl::desc("Generate dependency for main source file "
"(no system headers)"));
static llvm::cl::opt<std::string>
DependencyOutputFile("MF",
llvm::cl::desc("Specify dependency output file"));
static llvm::cl::opt<std::string>
DependencyTarget("MT",
llvm::cl::desc("Specify target for dependency"));
// FIXME: Implement feature
static llvm::cl::opt<bool>
PhonyDependencyTarget("MP",
llvm::cl::desc("Create phony target for each dependency "
"(other than main file)"));
bool clang::CreateDependencyFileGen(Preprocessor *PP,
std::string &OutputFile,
const std::string &InputFile,
const char *&ErrStr) {
assert(!InputFile.empty() && "No file given");
ErrStr = NULL;
if (!GenerateDependencyFile && !GenerateDependencyFileNoSysHeaders) {
if (!DependencyOutputFile.empty() || !DependencyTarget.empty() ||
PhonyDependencyTarget)
ErrStr = "Error: to generate dependencies you must specify -MD or -MMD\n";
return false;
}
// Handle conflicting options
if (GenerateDependencyFileNoSysHeaders)
GenerateDependencyFile = false;
// Determine name of dependency output filename
llvm::sys::Path DepFile;
if (!DependencyOutputFile.empty())
DepFile = DependencyOutputFile;
else if (!OutputFile.empty()) {
DepFile = OutputFile;
DepFile.eraseSuffix();
DepFile.appendSuffix(DependencyFileExt);
}
else {
DepFile = InputFile;
DepFile.eraseSuffix();
DepFile.appendSuffix(DependencyFileExt);
}
// Determine name of target
std::string Target;
if (!DependencyTarget.empty())
Target = DependencyTarget;
else if (!OutputFile.empty()) {
llvm::sys::Path TargetPath(OutputFile);
TargetPath.eraseSuffix();
TargetPath.appendSuffix(ObjectFileExt);
Target = TargetPath.toString();
}
else {
llvm::sys::Path TargetPath(InputFile);
TargetPath.eraseSuffix();
TargetPath.appendSuffix(ObjectFileExt);
Target = TargetPath.toString();
}
DependencyFileCallback *PPDep =
new DependencyFileCallback(PP, InputFile, DepFile.toString(),
Target, ErrStr);
if (ErrStr){
delete PPDep;
return false;
}
else {
PP->setPPCallbacks(PPDep);
return true;
}
}
/// FileMatchesDepCriteria - Determine whether the given Filename should be
/// considered as a dependency.
bool DependencyFileCallback::FileMatchesDepCriteria(const char *Filename,
SrcMgr::CharacteristicKind FileType) {
if (strcmp(InputFile.c_str(), Filename) != 0 &&
strcmp("<predefines>", Filename) != 0) {
if (GenerateDependencyFileNoSysHeaders)
return FileType == SrcMgr::C_User;
else
return true;
}
return false;
}
void DependencyFileCallback::FileChanged(SourceLocation Loc,
FileChangeReason Reason,
SrcMgr::CharacteristicKind FileType) {
if (Reason != PPCallbacks::EnterFile)
return;
const char *Filename = PP->getSourceManager().getSourceName(Loc);
if (!FileMatchesDepCriteria(Filename, FileType))
return;
// Remove leading "./"
if(Filename[0] == '.' && Filename[1] == '/')
Filename = &Filename[2];
Files.insert(Filename);
}
void DependencyFileCallback::OutputDependencyFile() {
std::string Output;
// Add "target: mainfile"
Output += Target;
Output += ": ";
Output += InputFile;
// Now add each dependency
for (llvm::StringSet<>::iterator I = Files.begin(),
E = Files.end(); I != E; ++I) {
// FIXME: Wrap lines
Output += " ";
Output += I->getKeyData();
}
OS << Output << "\n";
}
DependencyFileCallback::DependencyFileCallback(const Preprocessor *PP,
const std::string &InputFile,
const std::string &DepFile,
const std::string &Target,
const char *&ErrStr)
: PP(PP), InputFile(InputFile), Target(Target) {
OS.open(DepFile.c_str());
if (OS.fail())
ErrStr = "Could not open dependency output file\n";
else
ErrStr = NULL;
}
DependencyFileCallback::~DependencyFileCallback() {
if ((!GenerateDependencyFile && !GenerateDependencyFileNoSysHeaders) ||
OS.fail())
return;
OutputDependencyFile();
OS.close();
}
|
