ENH: Generalize exe implib dir creation for VS

In VS 7,8,9 executable targets we generate a build event to create the
output directory for the import library in case the executable marks
symbols with dllexport (VS forgets to create this directory).  This
generalizes computation of the custom command line to support future use
with other VS versions.

1 files changed, 30 insertions, 0 deletions

diff --git a/Source/cmLocalVisualStudioGenerator.cxx b/Source/cmLocalVisualStudioGenerator.cxx
index 66be038573..4706a966ba 100644
--- a/Source/cmLocalVisualStudioGenerator.cxx
+++ b/Source/cmLocalVisualStudioGenerator.cxx
@@ -34,6 +34,36 @@ cmLocalVisualStudioGenerator::~cmLocalVisualStudioGenerator()
 }
 
 //----------------------------------------------------------------------------
+cmsys::auto_ptr<cmCustomCommand>
+cmLocalVisualStudioGenerator::MaybeCreateImplibDir(cmTarget& target,
+                                                   const char* config)
+{
+  cmsys::auto_ptr<cmCustomCommand> pcc;
+
+  // If an executable exports symbols then VS wants to create an
+  // import library but forgets to create the output directory.
+  if(target.GetType() != cmTarget::EXECUTABLE) { return pcc; }
+  std::string outDir = target.GetDirectory(config, false);
+  std::string impDir = target.GetDirectory(config, true);
+  if(impDir == outDir) { return pcc; }
+
+  // Add a pre-build event to create the directory.
+  cmCustomCommandLine command;
+  command.push_back(this->Makefile->GetRequiredDefinition("CMAKE_COMMAND"));
+  command.push_back("-E");
+  command.push_back("make_directory");
+  command.push_back(impDir);
+  std::vector<std::string> no_output;
+  std::vector<std::string> no_depends;
+  cmCustomCommandLines commands;
+  commands.push_back(command);
+  pcc.reset(new cmCustomCommand(no_output, no_depends, commands, 0, 0));
+  pcc->SetEscapeOldStyle(false);
+  pcc->SetEscapeAllowMakeVars(true);
+  return pcc;
+}
+
+//----------------------------------------------------------------------------
 bool cmLocalVisualStudioGenerator::SourceFileCompiles(const cmSourceFile* sf)
 {
   // Identify the language of the source file.