You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.5 KiB
43 lines
1.5 KiB
This is an attempt to make GHC build reproducible. The name of .c files may end |
|
up in the resulting binary (in the debug section), but not the directory. |
|
|
|
Instead of using the process id, create a hash from the command line arguments, |
|
and assume that is going to be unique. |
|
|
|
Index: ghc-8.0.2/compiler/main/SysTools.hs |
|
=================================================================== |
|
--- ghc-8.0.2.orig/compiler/main/SysTools.hs |
|
+++ ghc-8.0.2/compiler/main/SysTools.hs |
|
@@ -65,6 +65,7 @@ |
|
import Util |
|
import DynFlags |
|
import Exception |
|
+import Fingerprint |
|
|
|
import LlvmCodeGen.Base (llvmVersionStr, supportedLlvmVersion) |
|
|
|
@@ -1145,8 +1146,8 @@ |
|
mapping <- readIORef dir_ref |
|
case Map.lookup tmp_dir mapping of |
|
Nothing -> do |
|
- pid <- getProcessID |
|
- let prefix = tmp_dir </> "ghc" ++ show pid ++ "_" |
|
+ pid <- getStableProcessID |
|
+ let prefix = tmp_dir </> "ghc" ++ pid ++ "_" |
|
mask_ $ mkTempDir prefix |
|
Just dir -> return dir |
|
where |
|
@@ -1562,6 +1563,13 @@ |
|
getProcessID = System.Posix.Internals.c_getpid >>= return . fromIntegral |
|
#endif |
|
|
|
+-- Debian-specific hack to get reproducible output, by not using the "random" |
|
+-- pid, but rather something determinisic |
|
+getStableProcessID :: IO String |
|
+getStableProcessID = do |
|
+ args <- getArgs |
|
+ return $ take 4 $ show $ fingerprintString $ unwords args |
|
+ |
|
-- Divvy up text stream into lines, taking platform dependent |
|
-- line termination into account. |
|
linesPlatform :: String -> [String]
|
|
|