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Add enableIPE and extraFlavourTransformers options to GHC derivation #2447

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Add enableIPE and extraFlavourTransformers options to GHC derivation #2447

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da9cbd5
Add a flag "enableIPE" to enable the IPE hadrian flavor
thomasjm Oct 30, 2025
19c9ea7
Add extraFlavourTransformers option to GHC config (closes #2425)
thomasjm Oct 31, 2025
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8 changes: 8 additions & 0 deletions compiler/ghc/default.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,8 @@ let self =

, enableDWARF ? false

, enableIPE ? false

, enableTerminfo ? !stdenv.targetPlatform.isAndroid &&
# Terminfo does not work on older ghc cross arm and windows compilers
(!haskell-nix.haskellLib.isCrossTarget || !(stdenv.targetPlatform.isAarch32 || stdenv.targetPlatform.isAarch64 || stdenv.targetPlatform.isWindows) || builtins.compareVersions ghc-version "8.10" >= 0)
Expand All @@ -61,6 +63,10 @@ let self =
else "perf-cross-ncg"
)

, # Extra flavour transformers to pass to Hadrian. For example, +debug_ghc or
# +assertions to work on debugging the compiler.
extraFlavourTransformers ? []

, # Whether to disable the large address space allocator
# necessary fix for iOS: https://www.reddit.com/r/haskell/comments/4ttdz1/building_an_osxi386_to_iosarm64_cross_compiler/d5qvd67/
disableLargeAddressSpace ? stdenv.targetPlatform.isDarwin && stdenv.targetPlatform.isAarch64 || stdenv.targetPlatform.isAndroid
Expand Down Expand Up @@ -385,6 +391,8 @@ let
+ lib.optionalString enableDWARF "+debug_info"
+ lib.optionalString ((enableNativeBignum && hadrianHasNativeBignumFlavour) || targetPlatform.isGhcjs || targetPlatform.isWasm) "+native_bignum"
+ lib.optionalString (targetPlatform.isGhcjs || targetPlatform.isWasm) "+no_profiled_libs"
+ lib.optionalString enableIPE "+ipe"
+ lib.concatStrings extraFlavourTransformers
} --docs=no-sphinx -j --verbose"
# This is needed to prevent $GCC from emitting out of line atomics.
# Those would then result in __aarch64_ldadd1_sync and others being referenced, which
Expand Down
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