I have no idea what you did, but I find that hard to believe, and this is with GNAT.
I have a hello.adb program, 99bytes, compiled 25k
-rwxrwxr-x 1 seg seg 25352 Nov 2 01:26 hello
-rw-rw-r-- 1 seg seg 99 Nov 2 01:23 hello.adb
-rw-rw-r-- 1 seg seg 1409 Nov 2 01:26 hello.ali
-rw-rw-r-- 1 seg seg 1576 Nov 2 01:26 hello.o