ghc: enable static RTS
This change allows loading statically compiled libreries into a running GHC, thus fixing the build of haskell packages that use TemplateHaskell. See [1] for the details. Fixes issue #61575, #124284. [1]: https://www.tweag.io/blog/2020-09-30-bazel-static-haskell/
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@ -33,7 +33,7 @@
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, # Whether to build dynamic libs for the standard library (on the target
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# platform). Static libs are always built.
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enableShared ? !stdenv.targetPlatform.isWindows && !stdenv.targetPlatform.useiOSPrebuilt
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enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
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, # Whether to build terminfo.
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enableTerminfo ? !stdenv.targetPlatform.isWindows
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@ -105,9 +105,13 @@ let
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CrossCompilePrefix = ${targetPrefix}
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'' + lib.optionalString (!enableProfiledLibs) ''
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GhcLibWays = "v dyn"
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'' + lib.optionalString enableRelocatedStaticLibs ''
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GhcLibHcOpts += -fPIC
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GhcRtsHcOpts += -fPIC
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'' +
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# -fexternal-dynamic-refs apparently (because it's not clear from the documentation)
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# makes the GHC RTS able to load static libraries, which may be needed for TemplateHaskell.
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# This solution was described in https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
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lib.optionalString enableRelocatedStaticLibs ''
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GhcLibHcOpts += -fPIC -fexternal-dynamic-refs
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GhcRtsHcOpts += -fPIC -fexternal-dynamic-refs
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'' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
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EXTRA_CC_OPTS += -std=gnu99
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'';
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@ -34,7 +34,7 @@
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, # Whether to build dynamic libs for the standard library (on the target
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# platform). Static libs are always built.
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enableShared ? !stdenv.targetPlatform.isWindows && !stdenv.targetPlatform.useiOSPrebuilt
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enableShared ? with stdenv.targetPlatform; !isWindows && !useiOSPrebuilt && !isStatic
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, # Whether to build terminfo.
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enableTerminfo ? !stdenv.targetPlatform.isWindows
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@ -106,9 +106,13 @@ let
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CrossCompilePrefix = ${targetPrefix}
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'' + lib.optionalString (!enableProfiledLibs) ''
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GhcLibWays = "v dyn"
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'' + lib.optionalString enableRelocatedStaticLibs ''
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GhcLibHcOpts += -fPIC
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GhcRtsHcOpts += -fPIC
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'' +
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# -fexternal-dynamic-refs apparently (because it's not clear from the documentation)
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# makes the GHC RTS able to load static libraries, which may be needed for TemplateHaskell.
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# This solution was described in https://www.tweag.io/blog/2020-09-30-bazel-static-haskell
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lib.optionalString enableRelocatedStaticLibs ''
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GhcLibHcOpts += -fPIC -fexternal-dynamic-refs
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GhcRtsHcOpts += -fPIC -fexternal-dynamic-refs
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'' + lib.optionalString targetPlatform.useAndroidPrebuilt ''
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EXTRA_CC_OPTS += -std=gnu99
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'';
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