BUG: Use link language for target name computation

The commit "Do not compute link language for LOCATION" was wrong.  The
variables

  CMAKE_STATIC_LIBRARY_PREFIX_Java
  CMAKE_STATIC_LIBRARY_SUFFIX_Java

are used for building Java .jar files.  This commit re-enables the
feature and documents the variables:

  CMAKE_EXECUTABLE_SUFFIX_<LANG>
  CMAKE_IMPORT_LIBRARY_PREFIX_<LANG>
  CMAKE_IMPORT_LIBRARY_SUFFIX_<LANG>
  CMAKE_SHARED_LIBRARY_PREFIX_<LANG>
  CMAKE_SHARED_LIBRARY_SUFFIX_<LANG>
  CMAKE_SHARED_MODULE_PREFIX_<LANG>
  CMAKE_SHARED_MODULE_SUFFIX_<LANG>
  CMAKE_STATIC_LIBRARY_PREFIX_<LANG>
  CMAKE_STATIC_LIBRARY_SUFFIX_<LANG>

Instead of making separate, repetitive entries for the _<LANG> variable
documentation, we just mention the per-language name in the text of the
platform-wide variable documentation.  Internally we keep undocumented
definitions of these properties to satisfy CMAKE_STRICT mode.

1 files changed, 15 insertions, 0 deletions

diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index 32c1688..6c9197c 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -2709,6 +2709,21 @@ void cmTarget::GetFullNameInternal(const char* config,
   const char* prefixVar = this->GetPrefixVariableInternal(implib);
   const char* suffixVar = this->GetSuffixVariableInternal(implib);
 
+  // Check for language-specific default prefix and suffix.
+  if(const char* ll = this->GetLinkerLanguage(config))
+    {
+    if(!targetSuffix && suffixVar && *suffixVar)
+      {
+      std::string langSuff = suffixVar + std::string("_") + ll;
+      targetSuffix = this->Makefile->GetDefinition(langSuff.c_str());
+      }
+    if(!targetPrefix && prefixVar && *prefixVar)
+      {
+      std::string langPrefix = prefixVar + std::string("_") + ll;
+      targetPrefix = this->Makefile->GetDefinition(langPrefix.c_str());
+      }
+    }
+
   // if there is no prefix on the target use the cmake definition
   if(!targetPrefix && prefixVar)
     {