Support passing demangle-cpp option via lcovrc

This patch allows users to passing the demangle-cpp option to genhtml
via lcovrc, alongside with CUI.

Signed-off-by: Katsuhiko Nishimra <ktns.87@gmail.com>

Author: ktns

bin/genhtml

@@ -387,6 +387,7 @@ if ($config || %opt_rc)
 		"genhtml_sort"			=> \$sort,
 		"genhtml_charset"		=> \$charset,
 		"genhtml_desc_html"		=> \$rc_desc_html,
+		"genhtml_demangle_cpp"		=> \$demangle_cpp,
 		"lcov_function_coverage"	=> \$lcov_func_coverage,
 		"lcov_branch_coverage"		=> \$lcov_branch_coverage,
 		});

lcovrc

@@ -96,6 +96,9 @@ genhtml_desc_html=0
 # Specify the precision for coverage rates
 #genhtml_precision=1
 
+# Demangle C++ symbols
+#genhtml_demangle_cpp=1
+
 # Location of the gcov tool (same as --gcov-info option of geninfo)
 #geninfo_gcov_tool = gcov
 

man/lcovrc.5

@@ -159,6 +159,11 @@ genhtml_desc_html=0
 #genhtml_precision=1
 .br
 
+# Demangle C++ symbols
+.br
+#genhtml_demangle_cpp=1
+.br
+
 # Location of the gcov tool
 .br
 #geninfo_gcov_tool = gcov
@@ -557,6 +562,18 @@ when a custom HTML prolog is specified (see also
 Default is UTF-8.
 .PP
 
+.BR genhtml_demangle_cpp " ="
+.IR 0 | 1
+.IP
+If non-zero, demangle C++ function names in function overviews.
+
+Set this option to one if you want to convert C++ internal function
+names to human readable format for display on the HTML function overview
+page.  This option requires that the c++filt tool is installed (see
+.BR c++filt(1)
+).
+.PP
+
 .BR genhtml_desc_html " ="
 .IR 0 | 1
 .IP