After many years, I have once again attempted to build GHC from source. The experience went much easier than in the past. This time, my system is running the now-old 10.5 (Leopard) using Xcode 3.1.4. I'm probably the only one who wants to build on 10.5, but I still appreciate the fact that GHC can be built on a variety of systems, allowing more people (like me) to hack on it. I ran into a few minor issues when building. (1) I had a problem with gmp. No surprise, and I didn't want to fight it, so I built with integer-simple by adding INTEGER_LIBRARY=integer-simple to ./mk/build.mk . (2) It appears that integer-simple has a copy-paste bug that was easy to fix: $ cd libraries/integer-simple/ $ git diff diff --git a/GHC/Integer/Type.hs b/GHC/Integer/Type.hs index 02eeef2..f620e67 100644 --- a/GHC/Integer/Type.hs +++ b/GHC/Integer/Type.hs @@ -97,8 +97,8 @@ integerToInt i = word2Int# (integerToWord i) integerToWord64 :: Integer -> Word64# integerToWord64 i = int64ToWord64# (integerToInt64 i) -{-# NOINLINE word64ToInteger:: #-} -word64ToInteger:: Word64# -> Integer +{-# NOINLINE word64ToInteger #-} +word64ToInteger :: Word64# -> Integer word64ToInteger w = if w `eqWord64#` wordToWord64# 0## then Naught else Positive (word64ToPositive w) (3) A linker flag was added for Xcode 4 that is not available in 3.1. $ git diff diff --git a/compiler/main/DriverPipeline.hs b/compiler/main/DriverPipeline.hs index b655425..ec8024d 100644 --- a/compiler/main/DriverPipeline.hs +++ b/compiler/main/DriverPipeline.hs @@ -1682,10 +1682,12 @@ linkBinary dflags o_files dep_packages = do -- like -- ld: warning: could not create compact unwind for .LFB3: non-standard register 5 -- on x86. +{- ++ (if platformOS (targetPlatform dflags) == OSDarwin && platformArch (targetPlatform dflags) `elem` [ArchX86, ArchX86_64] then ["-Wl,-no_compact_unwind"] else []) +-} -- '-Wl,-read_only_relocs,suppress' -- ld gives loads of warnings like: I think the fix to integer-simple should be applied, since it's an obvious improvement. I suspect the last issue might be controversial, since it seems to involve an apparently incompatible difference between the older and newer Xcode versions. Of course, I would like to see the older version still supported, but, as I said, I may be among a very small minority in this vote. Regards, Sean