Nixify C build

This is working with libsodium as an example. Its unfortunate that we need the
extra ':arg -lsodium' but how else can I get the name of the library for
linking? Is that something in the nix attr metadata? Anyway, an optimization for
another day.

1 files changed, 12 insertions, 3 deletions

diff --git a/Biz/Bild/Example.c b/Biz/Bild/Example.c
index 9966dba..52ea9b9 100644
--- a/Biz/Bild/Example.c
+++ b/Biz/Bild/Example.c
@@ -1,6 +1,15 @@
-// : out helloworld.exe
-void
-main ()
+// : out examplesodium.exe
+// : dep libsodium
+// : arg -lsodium
+#include <sodium.h>
+
+int
+main (void)
 {
+  if (sodium_init () < 0)
+    {
+      /* panic! the library couldn't be initialized; it is not safe to use */
+    }
   printf ("Biz/Bild/Example.c: Hello world!\n");
+  return 0;
 }