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
|
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmLinkLineDeviceComputer.h"
#include <algorithm>
#include <set>
#include <sstream>
#include <utility>
#include <vector>
#include "cmAlgorithms.h"
#include "cmComputeLinkInformation.h"
#include "cmGeneratorTarget.h"
#include "cmLocalGenerator.h"
#include "cmStateDirectory.h"
#include "cmStateSnapshot.h"
#include "cmStateTypes.h"
#include "cmSystemTools.h"
class cmOutputConverter;
cmLinkLineDeviceComputer::cmLinkLineDeviceComputer(
cmOutputConverter* outputConverter, cmStateDirectory const& stateDir)
: cmLinkLineComputer(outputConverter, stateDir)
{
}
cmLinkLineDeviceComputer::~cmLinkLineDeviceComputer() = default;
static bool cmLinkItemValidForDevice(std::string const& item)
{
// Valid items are:
// * Non-flags (does not start in '-')
// * Specific flags --library, --library-path, -l, -L
// For example:
// * 'cublas_device' => pass-along
// * '--library pthread' => pass-along
// * '-lpthread' => pass-along
// * '-pthread' => drop
// * '-a' => drop
// * '-framework Name' (as one string) => drop
return (!cmHasLiteralPrefix(item, "-") || //
cmHasLiteralPrefix(item, "-l") || //
cmHasLiteralPrefix(item, "-L") || //
cmHasLiteralPrefix(item, "--library"));
}
bool cmLinkLineDeviceComputer::ComputeRequiresDeviceLinking(
cmComputeLinkInformation& cli)
{
// Determine if this item might requires device linking.
// For this we only consider targets
typedef cmComputeLinkInformation::ItemVector ItemVector;
ItemVector const& items = cli.GetItems();
std::string config = cli.GetConfig();
for (auto const& item : items) {
if (item.Target &&
item.Target->GetType() == cmStateEnums::STATIC_LIBRARY) {
if ((!item.Target->GetPropertyAsBool("CUDA_RESOLVE_DEVICE_SYMBOLS")) &&
item.Target->GetPropertyAsBool("CUDA_SEPARABLE_COMPILATION")) {
// this dependency requires us to device link it
return true;
}
}
}
return false;
}
std::string cmLinkLineDeviceComputer::ComputeLinkLibraries(
cmComputeLinkInformation& cli, std::string const& stdLibString)
{
// Write the library flags to the build rule.
std::ostringstream fout;
// Generate the unique set of link items when device linking.
// The nvcc device linker is designed so that each static library
// with device symbols only needs to be listed once as it doesn't
// care about link order.
std::set<std::string> emitted;
typedef cmComputeLinkInformation::ItemVector ItemVector;
ItemVector const& items = cli.GetItems();
std::string config = cli.GetConfig();
bool skipItemAfterFramework = false;
for (auto const& item : items) {
if (skipItemAfterFramework) {
skipItemAfterFramework = false;
continue;
}
if (item.Target) {
bool skip = true;
if (item.Target->GetType() == cmStateEnums::STATIC_LIBRARY) {
if ((!item.Target->GetPropertyAsBool("CUDA_RESOLVE_DEVICE_SYMBOLS")) &&
item.Target->GetPropertyAsBool("CUDA_SEPARABLE_COMPILATION")) {
skip = false;
}
}
if (skip) {
continue;
}
}
std::string out;
if (item.IsPath) {
// nvcc understands absolute paths to libraries ending in '.a' or '.lib'.
// These should be passed to nvlink. Other extensions need to be left
// out because nvlink may not understand or need them. Even though it
// can tolerate '.so' or '.dylib' it cannot tolerate '.so.1'.
if (cmHasLiteralSuffix(item.Value, ".a") ||
cmHasLiteralSuffix(item.Value, ".lib")) {
out += this->ConvertToOutputFormat(
this->ConvertToLinkReference(item.Value));
}
} else if (item.Value == "-framework") {
// This is the first part of '-framework Name' where the framework
// name is specified as a following item. Ignore both.
skipItemAfterFramework = true;
continue;
} else if (cmLinkItemValidForDevice(item.Value)) {
out += item.Value;
}
if (emitted.insert(out).second) {
fout << out << " ";
}
}
if (!stdLibString.empty()) {
fout << stdLibString << " ";
}
return fout.str();
}
std::string cmLinkLineDeviceComputer::GetLinkerLanguage(cmGeneratorTarget*,
std::string const&)
{
return "CUDA";
}
bool requireDeviceLinking(cmGeneratorTarget& target, cmLocalGenerator& lg,
const std::string& config)
{
if (target.GetType() == cmStateEnums::OBJECT_LIBRARY) {
return false;
}
if (const char* resolveDeviceSymbols =
target.GetProperty("CUDA_RESOLVE_DEVICE_SYMBOLS")) {
// If CUDA_RESOLVE_DEVICE_SYMBOLS has been explicitly set we need
// to honor the value no matter what it is.
return cmSystemTools::IsOn(resolveDeviceSymbols);
}
if (const char* separableCompilation =
target.GetProperty("CUDA_SEPARABLE_COMPILATION")) {
if (cmSystemTools::IsOn(separableCompilation)) {
bool doDeviceLinking = false;
switch (target.GetType()) {
case cmStateEnums::SHARED_LIBRARY:
case cmStateEnums::MODULE_LIBRARY:
case cmStateEnums::EXECUTABLE:
doDeviceLinking = true;
break;
default:
break;
}
return doDeviceLinking;
}
}
// Determine if we have any dependencies that require
// us to do a device link step
const std::string cuda_lang("CUDA");
cmGeneratorTarget::LinkClosure const* closure =
target.GetLinkClosure(config);
bool closureHasCUDA =
(std::find(closure->Languages.begin(), closure->Languages.end(),
cuda_lang) != closure->Languages.end());
if (closureHasCUDA) {
cmComputeLinkInformation* pcli = target.GetLinkInformation(config);
if (pcli) {
cmLinkLineDeviceComputer deviceLinkComputer(
&lg, lg.GetStateSnapshot().GetDirectory());
return deviceLinkComputer.ComputeRequiresDeviceLinking(*pcli);
}
return true;
}
return false;
}
|
