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
|
// file : build2/cc/link-rule.hxx -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef BUILD2_CC_LINK_RULE_HXX
#define BUILD2_CC_LINK_RULE_HXX
#include <set>
#include <build2/types.hxx>
#include <build2/utility.hxx>
#include <build2/rule.hxx>
#include <build2/cc/types.hxx>
#include <build2/cc/common.hxx>
namespace build2
{
namespace cc
{
class link_rule: public rule, virtual common
{
public:
link_rule (data&&);
virtual bool
match (action, target&, const string&) const override;
virtual recipe
apply (action, target&) const override;
target_state
perform_update (action, const target&) const;
target_state
perform_clean (action, const target&) const;
private:
friend class install_rule;
friend class libux_install_rule;
// Shared library paths.
//
struct libs_paths
{
// If any (except real) is empty, then it is the same as the next
// one. Except for intermediate, for which empty indicates that it is
// not used.
//
// The libs{} path is always the real path. On Windows the link path
// is the import library.
//
path link; // What we link: libfoo.so
path soname; // SONAME: libfoo-1.so, libfoo.so.1
path interm; // Intermediate: libfoo.so.1.2
const path* real; // Real: libfoo.so.1.2.3
inline const path&
effect_link () const {return link.empty () ? effect_soname () : link;}
inline const path&
effect_soname () const {return soname.empty () ? *real : soname;}
// Cleanup pattern used to remove previous versions. If empty, no
// cleanup is performed. The above (current) names are automatically
// filtered out.
//
path clean;
};
libs_paths
derive_libs_paths (file&, const char*, const char*) const;
struct match_data
{
// The "for install" condition is signalled to us by install_rule when
// it is matched for the update operation. It also verifies that if we
// have already been executed, then it was for install.
//
// This has an interesting implication: it means that this rule cannot
// be used to update targets during match. Specifically, we cannot be
// executed for group resolution purposes (not a problem) nor as part
// of the generated source update. The latter case can be a problem:
// imagine a code generator that itself may need to be updated before
// it can be used to re-generate some out-of-date source code. As an
// aside, note that even if we were somehow able to communicate the
// "for install" in this case, the result of such an update may not
// actually be "usable" (e.g., not runnable because of the missing
// rpaths). There is another prominent case where the result may not
// be usable: cross-compilation.
//
// So the current (admittedly fuzzy) thinking is that a project shall
// not try to use its own build for update since it may not be usable
// (because of cross-compilations, being "for install", etc). Instead,
// it should rely on another, "usable" build of itself (this, BTW, is
// related to bpkg's build-time vs run-time dependencies).
//
optional<bool> for_install;
libs_paths libs_data;
};
// Library handling.
//
void
append_libraries (strings&,
const file&, bool, lflags,
const scope&, action, linfo) const;
void
hash_libraries (sha256&,
bool&, timestamp,
const file&, bool, lflags,
const scope&, action, linfo) const;
void
rpath_libraries (strings&,
const target&,
const scope&, action, linfo,
bool) const;
// Windows rpath emulation (windows-rpath.cxx).
//
struct windows_dll
{
const string& dll;
const string* pdb; // NULL if none.
string pdb_storage;
bool operator< (const windows_dll& y) const {return dll < y.dll;}
};
using windows_dlls = std::set<windows_dll>;
timestamp
windows_rpath_timestamp (const file&,
const scope&,
action, linfo) const;
windows_dlls
windows_rpath_dlls (const file&, const scope&, action, linfo) const;
void
windows_rpath_assembly (const file&, const scope&, action, linfo,
const string&,
timestamp,
bool) const;
// Windows-specific (windows-manifest.cxx).
//
pair<path, bool>
windows_manifest (const file&, bool rpath_assembly) const;
// pkg-config's .pc file generation (pkgconfig.cxx).
//
void
pkgconfig_save (action, const file&, bool) const;
private:
const string rule_id;
};
}
}
#endif // BUILD2_CC_LINK_RULE_HXX
|
