summaryrefslogtreecommitdiffstats
path: root/Source/cmGeneratorExpressionDAGChecker.cxx
blob: 269211b92b9a8f4c6a914cd1bf0aedf3a672b4d8 (plain)
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
/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2012 Stephen Kelly <steveire@gmail.com>

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/

#include "cmGeneratorExpressionDAGChecker.h"

#include "cmMakefile.h"

//----------------------------------------------------------------------------
cmGeneratorExpressionDAGChecker::cmGeneratorExpressionDAGChecker(
                const cmListFileBacktrace &backtrace,
                const std::string &target,
                const std::string &property,
                const GeneratorExpressionContent *content,
                cmGeneratorExpressionDAGChecker *parent)
  : Parent(parent), Target(target), Property(property),
    Content(content), Backtrace(backtrace)
{
  this->CheckResult = this->checkGraph();
}

//----------------------------------------------------------------------------
cmGeneratorExpressionDAGChecker::Result
cmGeneratorExpressionDAGChecker::check() const
{
  return this->CheckResult;
}

//----------------------------------------------------------------------------
void cmGeneratorExpressionDAGChecker::reportError(
                  cmGeneratorExpressionContext *context,
                  const std::string &expr)
{
  if (this->CheckResult == DAG)
    {
    return;
    }

  context->HadError = true;
  if (context->Quiet)
    {
    return;
    }

  const cmGeneratorExpressionDAGChecker *parent = this->Parent;

  if (parent && !parent->Parent)
    {
    cmOStringStream e;
    e << "Error evaluating generator expression:\n"
      << "  " << expr << "\n"
      << "Self reference on target \""
      << context->HeadTarget->GetName() << "\".\n";
    context->Makefile->GetCMakeInstance()
      ->IssueMessage(cmake::FATAL_ERROR, e.str().c_str(),
                      parent->Backtrace);
    return;
    }

  {
  cmOStringStream e;
  e << "Error evaluating generator expression:\n"
    << "  " << expr << "\n"
    << "Dependency loop found.";
  context->Makefile->GetCMakeInstance()
    ->IssueMessage(cmake::FATAL_ERROR, e.str().c_str(),
                    context->Backtrace);
  }

  int loopStep = 1;
  while (parent)
    {
    cmOStringStream e;
    e << "Loop step " << loopStep << "\n"
      << "  "
      << (parent->Content ? parent->Content->GetOriginalExpression() : expr)
      << "\n";
    context->Makefile->GetCMakeInstance()
      ->IssueMessage(cmake::FATAL_ERROR, e.str().c_str(),
                      parent->Backtrace);
    parent = parent->Parent;
    ++loopStep;
    }
}

//----------------------------------------------------------------------------
cmGeneratorExpressionDAGChecker::Result
cmGeneratorExpressionDAGChecker::checkGraph() const
{
  const cmGeneratorExpressionDAGChecker *parent = this->Parent;
  while (parent)
    {
    if (this->Target == parent->Target && this->Property == parent->Property)
      {
      return parent->Parent ? CYCLIC_REFERENCE : SELF_REFERENCE;
      }
    parent = parent->Parent;
    }
  return DAG;
}

//----------------------------------------------------------------------------
bool cmGeneratorExpressionDAGChecker::EvaluatingLinkLibraries()
{
  const cmGeneratorExpressionDAGChecker *top = this;
  const cmGeneratorExpressionDAGChecker *parent = this->Parent;
  while (parent)
    {
    top = parent;
    parent = parent->Parent;
    }

  const char *prop = top->Property.c_str();
  return (strcmp(prop, "LINK_LIBRARIES") == 0
       || strcmp(prop, "LINK_INTERFACE_LIBRARIES") == 0
       || strcmp(prop, "IMPORTED_LINK_INTERFACE_LIBRARIES") == 0
       || strncmp(prop, "LINK_INTERFACE_LIBRARIES_", 26) == 0
       || strncmp(prop, "IMPORTED_LINK_INTERFACE_LIBRARIES_", 35) == 0);
}