Encoding: Write Visual Studio solution file with BOM.

When configured to use UTF-8 internally, add a UTF-8 BOM
to generated .sln files for Visual Studio to correctly
handle them.
Otherwise, some versions of Visual Studio will read them
as ANSI encoded files.

Source/cmGlobalVisualStudio71Generator.cxx

@@ -93,6 +93,11 @@ void cmGlobalVisualStudio71Generator
                cmLocalGenerator* root,
                std::vector<cmLocalGenerator*>& generators)
 {
+#ifdef CMAKE_ENCODING_UTF8
+  // Add UTF-8 BOM for .sln file to indicate encoding
+  const unsigned char utf8_bom[3] = {0xEF,0xBB,0xBF};
+  fout.write(reinterpret_cast<const char*>(utf8_bom), 3);
+#endif
   // Write out the header for a SLN file
   this->WriteSLNHeader(fout);
 

Source/cmGlobalVisualStudio7Generator.cxx

@@ -558,6 +558,11 @@ void cmGlobalVisualStudio7Generator
                cmLocalGenerator* root,
                std::vector<cmLocalGenerator*>& generators)
 {
+#ifdef CMAKE_ENCODING_UTF8
+  // Add UTF-8 BOM for .sln file to indicate encoding
+  const unsigned char utf8_bom[3] = {0xEF,0xBB,0xBF};
+  fout.write(reinterpret_cast<const char*>(utf8_bom), 3);
+#endif
   // Write out the header for a SLN file
   this->WriteSLNHeader(fout);