From 668a528731167f6cf43cbfe8c9a2425790d453d8 Mon Sep 17 00:00:00 2001
From: albert-github <albert.tests@gmail.com>
Date: Sun, 31 Jan 2021 12:28:02 +0100
Subject: Extended doxygen version information

Create possibility for extended version  information with included extra possibilities (clang / sqlite3 / ...) by means of the options `-V` / `--Version` / `--VERSION`.
---
 doc/trouble.doc |  3 ++-
 src/doxygen.cpp | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 58 insertions(+), 4 deletions(-)

diff --git a/doc/trouble.doc b/doc/trouble.doc
index cb50399..5405a81 100644
--- a/doc/trouble.doc
+++ b/doc/trouble.doc
@@ -106,7 +106,8 @@ helpful and it will cost me much more time to figure out what you mean.
 In the worst-case your bug report may even be completely ignored by me, so
 always try to include the following information in your bug report: 
 - The version of doxygen you are using (for instance 1.5.3, use 
-  `doxygen --version` if you are not sure).
+  `doxygen --version` if you are not sure or `doxygen --Version` for a bit
+  more information).
 - The name and version number of your operating system (for instance 
   Ubuntu Linux 18.04 LTS)
 - It is usually a good idea to send along the configuration file as well, 
diff --git a/src/doxygen.cpp b/src/doxygen.cpp
index f5a280b..28bb49b 100644
--- a/src/doxygen.cpp
+++ b/src/doxygen.cpp
@@ -106,6 +106,14 @@
 #include "clangparser.h"
 #include "symbolresolver.h"
 
+#if USE_SQLITE3
+#include <sqlite3.h>
+#endif
+
+#if USE_LIBCLANG
+#include <clang/Basic/Version.h>
+#endif
+
 // provided by the generated file resources.cpp
 extern void initResources();
 
@@ -9959,6 +9967,39 @@ static void devUsage()
 
 
 //----------------------------------------------------------------------------
+// print the version of doxygen
+
+static void version(const bool extended)
+{
+  QCString versionString = getFullVersion();
+  msg("%s\n",versionString.data());
+  if (extended)
+  {
+    QCString extVers;
+#if USE_SQLITE3
+    if (!extVers.isEmpty()) extVers+= ", ";
+    extVers += "sqlite3 ";
+    extVers += sqlite3_libversion();
+#endif
+#if USE_LIBCLANG
+    if (!extVers.isEmpty()) extVers+= ", ";
+    extVers += "clang support ";
+    extVers += CLANG_VERSION_STRING;
+#endif
+#if MULTITHREADED_SOURCE_GENERATOR
+    if (!extVers.isEmpty()) extVers+= ", ";
+    extVers += "multi-threaded support ";
+#endif
+    if (!extVers.isEmpty())
+    {
+      int lastComma = extVers.findRev(',');
+      if (lastComma != -1) extVers = extVers.replace(lastComma,1," and");
+      msg("    with %s.\n",extVers.data());
+    }
+  }
+}
+
+//----------------------------------------------------------------------------
 // print the usage of doxygen
 
 static void usage(const char *name,const char *versionString)
@@ -9992,7 +10033,7 @@ static void usage(const char *name,const char *versionString)
   msg("If -s is specified the comments of the configuration items in the config file will be omitted.\n");
   msg("If configName is omitted 'Doxyfile' will be used as a default.\n");
   msg("If - is used for configFile doxygen will write / read the configuration to /from standard output / input.\n\n");
-  msg("-v print version string\n");
+  msg("-v print version string, -V print extended version information\n");
 }
 
 //----------------------------------------------------------------------------
@@ -10400,7 +10441,12 @@ void readConfiguration(int argc, char **argv)
         g_dumpSymbolMap = TRUE;
         break;
       case 'v':
-        msg("%s\n",versionString.data());
+        version(false);
+        cleanUpDoxygen();
+        exit(0);
+        break;
+      case 'V':
+        version(true);
         cleanUpDoxygen();
         exit(0);
         break;
@@ -10412,7 +10458,14 @@ void readConfiguration(int argc, char **argv)
         }
         else if (qstrcmp(&argv[optind][2],"version")==0)
         {
-          msg("%s\n",versionString.data());
+          version(false);
+          cleanUpDoxygen();
+          exit(0);
+        }
+        else if ((qstrcmp(&argv[optind][2],"Version")==0) || 
+                 (qstrcmp(&argv[optind][2],"VERSION")==0))
+        {
+          version(true);
           cleanUpDoxygen();
           exit(0);
         }
-- 
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