1 files changed, 34 insertions, 0 deletions
diff --git a/include/dnsjit/gen-compat.lua b/include/dnsjit/gen-compat.lua
new file mode 100644
index 0000000..65c40ec
--- /dev/null
+++ b/include/dnsjit/gen-compat.lua
@@ -0,0 +1,34 @@
+for line in io.lines("config.h") do
+    local n, s = line:match("define SIZEOF_(%S*) (%d+)")
+    if n and s then
+        if n:match("^PTHREAD") or n:match("^CK_") or n:match("^GNUTLS_") then
+            s = math.ceil(s / 8)
+            print("#if !defined(SIZEOF_"..n..") || SIZEOF_"..n.." == 0")
+            print("#error \""..n.." is undefined or zero\"")
+            print("#endif")
+            n = n:lower()
+            print("typedef struct "..n:sub(1,-3).." { uint64_t a["..s.."]; } "..n..";")
+        elseif n:match("^STRUCT") then
+            n = n:match("^STRUCT_(%S*)")
+            if n == "SOCKADDR_STORAGE" or n == "POLLFD" then
+                print("#if !defined(SIZEOF_STRUCT_"..n..") || SIZEOF_STRUCT_"..n.." == 0")
+                print("#error \""..n.." is undefined or zero\"")
+                print("#endif")
+                n = n:lower()
+                print("struct "..n.." { uint8_t a["..s.."]; };")
+            end
+        end
+    end
+end
+code, err = pcall(function()
+    local ffi = require("ffi")
+    ffi.cdef[[
+    ssize_t dummy;
+    ]]
+end)
+if code then
+    print("#include <unistd.h>")
+    print("typedef ssize_t luajit_ssize_t;")
+else
+    print("typedef long luajit_ssize_t;")
+end