[doc] Output all gbc options

- Show all gbc options in documentation
- When running gbc without options show full help

compiler/Main.hs

@@ -29,7 +29,7 @@ type Template = MappingContext -> String -> [Import] -> [Declaration] -> (String
 main :: IO()
 main = do
     args <- getArgs
-    options <- (if null args then withArgs ["--help"] else id) getOptions
+    options <- (if null args then withArgs ["--help=all"] else id) getOptions
     setJobs $ jobs options
     case options of
         Cpp {..}    -> cppCodegen options

doc/CMakeLists.txt

@@ -70,7 +70,7 @@ if (Haskell_PANDOC_EXECUTABLE AND Doxygen_EXECUTABLE)
     add_custom_command(
         OUTPUT  "${CMAKE_CURRENT_BINARY_DIR}/html/manual/gbc.html"
         COMMAND ${CMAKE_COMMAND} -E copy .pandoc/templates/cmdargs.html "${CMAKE_CURRENT_BINARY_DIR}/html/manual/gbc.html"
-        COMMAND ${GBC_EXECUTABLE} --help=html >> "${CMAKE_CURRENT_BINARY_DIR}/html/manual/gbc.html"
+        COMMAND ${GBC_EXECUTABLE} --help=all,html >> "${CMAKE_CURRENT_BINARY_DIR}/html/manual/gbc.html"
         WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
         DEPENDS .pandoc/templates/cmdargs.html gbc ${GBC_EXECUTABLE})