Refactor header configuration handling.

- Mark optional fields and normalize them on load.
- Validate (work in progress) required fields and their values.
- Make sure that errors point to useful location in the config file.

1 files changed, 5 insertions, 1 deletions

diff --git a/mkelf.lua b/mkelf.lua
index 1140be2..af794a0 100644
--- a/mkelf.lua
+++ b/mkelf.lua
@@ -29,7 +29,11 @@ local function loadconfig(fn)
             SegmentFlags = elf.SegmentFlags,
             ELFVERSION = elf.VERSION,
 
-            header = function(t) header = setmetatable(t, header_mt) end,
+            header = function(t)
+                header = setmetatable(t, header_mt)
+                t:normalize()
+                t:validate()
+            end,
             segments = function(t) segments = setmetatable(t, segments_mt) end,
             sections = function(t) sections = setmetatable(t, sections_mt) end,
         },