Export: Process relative includes after genex evaluation.

In code such as

 install(TARGETS ...
   INCLUDES DESTINATION $<FOO>include
 )

the generator expressions are evaluated at generate-time. Delay
determining whether each entry is a relative path until after
the generator expressions are evaluated. Such relative paths
are based relative to the CMAKE_INSTALL_PREFIX.

1 files changed, 23 insertions, 0 deletions

diff --git a/Source/cmExportFileGenerator.cxx b/Source/cmExportFileGenerator.cxx
index 2ce4458..8f83c02 100644
--- a/Source/cmExportFileGenerator.cxx
+++ b/Source/cmExportFileGenerator.cxx
@@ -286,6 +286,27 @@ static bool checkInterfaceDirs(const std::string &prepro,
 }
 
 //----------------------------------------------------------------------------
+static void prefixItems(std::string &exportDirs)
+{
+  std::vector<std::string> entries;
+  cmGeneratorExpression::Split(exportDirs, entries);
+  exportDirs = "";
+  const char *sep = "";
+  for(std::vector<std::string>::const_iterator ei = entries.begin();
+      ei != entries.end(); ++ei)
+    {
+    exportDirs += sep;
+    sep = ";";
+    if (!cmSystemTools::FileIsFullPath(ei->c_str())
+        && ei->find("${_IMPORT_PREFIX}") == std::string::npos)
+      {
+      exportDirs += "${_IMPORT_PREFIX}/";
+      }
+    exportDirs += *ei;
+    }
+}
+
+//----------------------------------------------------------------------------
 void cmExportFileGenerator::PopulateIncludeDirectoriesInterface(
                       cmTargetExport *tei,
                       cmGeneratorExpression::PreprocessContext preprocessRule,
@@ -330,6 +351,8 @@ void cmExportFileGenerator::PopulateIncludeDirectoriesInterface(
     return;
     }
 
+  prefixItems(exportDirs);
+
   std::string includes = (input?input:"");
   const char* sep = input ? ";" : "";
   includes += sep + exportDirs;