Fix doxygen.cmake (don't setup doxytag when not installing the doc) (#…

…119)

doxygen.cmake

@@ -184,20 +184,22 @@ MACRO(_SETUP_PROJECT_DOCUMENTATION_FINALIZE)
       SET(DOXYGEN_HEADER_NAME "header.html")
     ENDIF()
 
-    # Find doxytag files
-    # To ignore this list of tag files, add to doc/Doxyfile.extra.in
-    # TAGFILES =
-    STRING(REPLACE "," ";" PKG_REQUIRES "${_PKG_CONFIG_REQUIRES}")
-    FOREACH(PKG_CONFIG_STRING ${PKG_REQUIRES})
-      _PARSE_PKG_CONFIG_STRING(${PKG_CONFIG_STRING} LIBRARY_NAME PREFIX)
-      # If DOXYGENDOCDIR is specified, add a doc path.
-      IF( DEFINED ${PREFIX}_DOXYGENDOCDIR
-          AND EXISTS ${${PREFIX}_DOXYGENDOCDIR}/${LIBRARY_NAME}.doxytag)
-        FILE(RELATIVE_PATH DEP_DOCDIR ${_PKG_CONFIG_DOXYGENDOCDIR} ${${PREFIX}_DOXYGENDOCDIR})
-
-        SET(DOXYTAG_ENTRIES "${DOXYTAG_ENTRIES} \"${${PREFIX}_DOXYGENDOCDIR}/${LIBRARY_NAME}.doxytag\"=\"${DEP_DOCDIR}\"")
-      ENDIF()
-    ENDFOREACH()
+    IF(_INSTALL_DOC)
+      # Find doxytag files
+      # To ignore this list of tag files, add to doc/Doxyfile.extra.in
+      # TAGFILES =
+      STRING(REPLACE "," ";" PKG_REQUIRES "${_PKG_CONFIG_REQUIRES}")
+      FOREACH(PKG_CONFIG_STRING ${PKG_REQUIRES})
+        _PARSE_PKG_CONFIG_STRING(${PKG_CONFIG_STRING} LIBRARY_NAME PREFIX)
+        # If DOXYGENDOCDIR is specified, add a doc path.
+        IF( DEFINED ${PREFIX}_DOXYGENDOCDIR
+            AND EXISTS ${${PREFIX}_DOXYGENDOCDIR}/${LIBRARY_NAME}.doxytag)
+          FILE(RELATIVE_PATH DEP_DOCDIR ${_PKG_CONFIG_DOXYGENDOCDIR} ${${PREFIX}_DOXYGENDOCDIR})
+
+          SET(DOXYTAG_ENTRIES "${DOXYTAG_ENTRIES} \"${${PREFIX}_DOXYGENDOCDIR}/${LIBRARY_NAME}.doxytag\"=\"${DEP_DOCDIR}\"")
+        ENDIF()
+      ENDFOREACH()
+    ENDIF()
 
     # Generate Doxyfile.extra.
     IF(EXISTS ${PROJECT_SOURCE_DIR}/doc/Doxyfile.extra.in)