haskell.compiler.*: be clear about LLVM build->target role

Since LLVM itself doesn't depend on target at all, this doesn't change
anything *in effect* (i. e. rebuild count should be zero), but it is
more clear about the intention and what LLVM is used for here (i. e. in
depsBuildTarget).

pkgs/development/compilers/ghc/8.10.7.nix

@@ -15,7 +15,7 @@
 , # LLVM is conceptually a run-time-only depedendency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
-  buildLlvmPackages, llvmPackages
+  buildTargetLlvmPackages, llvmPackages
 
 , # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
@@ -122,7 +122,7 @@ let
 
   toolsForTarget = [
     pkgsBuildTarget.targetPackages.stdenv.cc
-  ] ++ lib.optional useLLVM buildLlvmPackages.llvm;
+  ] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
 
   targetCC = builtins.head toolsForTarget;
 

pkgs/development/compilers/ghc/8.8.4.nix

@@ -14,7 +14,7 @@
 , # LLVM is conceptually a run-time-only depedendency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
-  buildLlvmPackages, llvmPackages
+  buildTargetLlvmPackages, llvmPackages
 
 , # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
@@ -130,7 +130,7 @@ let
 
   toolsForTarget = [
     pkgsBuildTarget.targetPackages.stdenv.cc
-  ] ++ lib.optional useLLVM buildLlvmPackages.llvm;
+  ] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
 
   targetCC = builtins.head toolsForTarget;
 

pkgs/development/compilers/ghc/9.0.1.nix

@@ -16,7 +16,7 @@
 , # LLVM is conceptually a run-time-only depedendency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
-  buildLlvmPackages, llvmPackages
+  buildTargetLlvmPackages, llvmPackages
 
 , # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
@@ -117,7 +117,7 @@ let
 
   toolsForTarget = [
     pkgsBuildTarget.targetPackages.stdenv.cc
-  ] ++ lib.optional useLLVM buildLlvmPackages.llvm;
+  ] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
 
   targetCC = builtins.head toolsForTarget;
 

pkgs/development/compilers/ghc/9.2.1.nix

@@ -16,7 +16,7 @@
 , # LLVM is conceptually a run-time-only depedendency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
-  buildLlvmPackages, llvmPackages
+  buildTargetLlvmPackages, llvmPackages
 
 , # If enabled, GHC will be built with the GPL-free but slower integer-simple
   # library instead of the faster but GPLed integer-gmp library.
@@ -117,7 +117,7 @@ let
 
   toolsForTarget = [
     pkgsBuildTarget.targetPackages.stdenv.cc
-  ] ++ lib.optional useLLVM buildLlvmPackages.llvm;
+  ] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
 
   targetCC = builtins.head toolsForTarget;
 

pkgs/development/compilers/ghc/head.nix

@@ -21,7 +21,7 @@
 , # LLVM is conceptually a run-time-only depedendency, but for
   # non-x86, we need LLVM to bootstrap later stages, so it becomes a
   # build-time dependency too.
-  buildLlvmPackages, llvmPackages
+  buildTargetLlvmPackages, llvmPackages
 
 , # If enabled, GHC will be built with the GPL-free but slightly slower native
   # bignum backend instead of the faster but GPLed gmp backend.
@@ -130,7 +130,7 @@ let
 
   toolsForTarget = [
     pkgsBuildTarget.targetPackages.stdenv.cc
-  ] ++ lib.optional useLLVM buildLlvmPackages.llvm;
+  ] ++ lib.optional useLLVM buildTargetLlvmPackages.llvm;
 
   targetCC = builtins.head toolsForTarget;
 

pkgs/top-level/haskell-packages.nix

@@ -1,4 +1,4 @@
-{ buildPackages, pkgs, newScope, stdenv }:
+{ buildPackages, pkgsBuildTarget, pkgs, newScope, stdenv }:
 
 let
   # These are attributes in compiler and packages that don't support integer-simple.
@@ -79,7 +79,7 @@ in {
         else
           packages.ghc865Binary;
       inherit (buildPackages.python3Packages) sphinx;
-      buildLlvmPackages = buildPackages.llvmPackages_7;
+      buildTargetLlvmPackages = pkgsBuildTarget.llvmPackages_7;
       llvmPackages = pkgs.llvmPackages_7;
     };
     ghc8107 = callPackage ../development/compilers/ghc/8.10.7.nix {
@@ -96,7 +96,7 @@ in {
       # https://github.com/xattr/xattr/issues/44 and
       # https://github.com/xattr/xattr/issues/55 are solved.
       inherit (buildPackages.darwin) xattr autoSignDarwinBinariesHook;
-      buildLlvmPackages = buildPackages.llvmPackages_9;
+      buildTargetLlvmPackages = pkgsBuildTarget.llvmPackages_9;
       llvmPackages = pkgs.llvmPackages_9;
     };
     ghc901 = callPackage ../development/compilers/ghc/9.0.1.nix {
@@ -109,7 +109,7 @@ in {
           packages.ghc8107Binary;
       inherit (buildPackages.python3Packages) sphinx;
       inherit (buildPackages.darwin) autoSignDarwinBinariesHook;
-      buildLlvmPackages = buildPackages.llvmPackages_10;
+      buildTargetLlvmPackages = pkgsBuildTarget.llvmPackages_10;
       llvmPackages = pkgs.llvmPackages_10;
     };
     ghc921 = callPackage ../development/compilers/ghc/9.2.1.nix {
@@ -124,7 +124,7 @@ in {
       # https://github.com/xattr/xattr/issues/44 and
       # https://github.com/xattr/xattr/issues/55 are solved.
       inherit (buildPackages.darwin) xattr autoSignDarwinBinariesHook;
-      buildLlvmPackages = buildPackages.llvmPackages_10;
+      buildTargetLlvmPackages = pkgsBuildTarget.llvmPackages_10;
       llvmPackages = pkgs.llvmPackages_10;
     };
     ghcHEAD = callPackage ../development/compilers/ghc/head.nix {
@@ -134,7 +134,7 @@ in {
       # https://github.com/xattr/xattr/issues/44 and
       # https://github.com/xattr/xattr/issues/55 are solved.
       inherit (buildPackages.darwin) xattr autoSignDarwinBinariesHook;
-      buildLlvmPackages = buildPackages.llvmPackages_10;
+      buildTargetLlvmPackages = pkgsBuildTarget.llvmPackages_10;
       llvmPackages = pkgs.llvmPackages_10;
       libffi = pkgs.libffi;
     };