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haskell.compiler: elaborate error when cross compiling hadrian ghcs

People seem to frequently expect pkgsCross.*.haskell.compiler.* /
pkgsStatic.haskell.compiler.* to contain cross compilers and are greeted
with a failing assert instead. We can help them out a little bit, by
hinting the may have meant to use buildPackages.

sternenseemann aa6c7781 3641b16d

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unified split
Changed files
+2 -1
pkgs
development
compilers
ghc
common-hadrian.nix
+2 -1
pkgs/development/compilers/ghc/common-hadrian.nix 
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assert stdenv.buildPlatform == stdenv.hostPlatform || stdenv.hostPlatform == stdenv.targetPlatform;


     

       
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# It is currently impossible to cross-compile GHC with Hadrian.


     

       
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assert stdenv.buildPlatform == stdenv.hostPlatform;


     

       

       
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assert lib.assertMsg (stdenv.buildPlatform == stdenv.hostPlatform)


     

       

       
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  "GHC >= 9.6 can't be cross-compiled. If you meant to build a GHC cross-compiler, use `buildPackages`.";


     

       
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let


     

       
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  inherit (stdenv) buildPlatform hostPlatform targetPlatform;