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author | sternenseemann <sternenseemann@systemli.org> | 2022-01-07 02:30:01 +0100 |
---|---|---|
committer | sternenseemann <sternenseemann@systemli.org> | 2022-01-07 14:42:41 +0100 |
commit | 766f5ffb761bc916ea0f270f472d04ab30664d52 (patch) | |
tree | d67895941f0a0760acdae057ce0b51450b84268d | |
parent | 17c5a15c89f2523b2543f946daa4d018e04d731a (diff) | |
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llvmPackages_*: respect cc for target when choosing C++ flavour
llvmPackages_*.clang should check the default compiler for the package set it is targeting (targetPackages.stdenv.cc) instead of the compiler that has been used to build it (stdenv.cc) in order to get some sense of whether to use libc++ or libstdc++. Since we are now inspecting targetPackages in the llvmPackages.clang attribute, we need to avoid using it in the cross stdenv — which just forces us to explicitly request libcxxClang for darwin instead of relying on the clang attribute to pick it for us. We also need to do something similar for targetPackages.stdenv.cc: Here the llvmPackages.clang logic would work as we want (inspect targetPackages.stdenv.cc and if it doesn't exist, make the choice based on stdenv.cc), but it gets locked in a cycle with the previous package. We can easily break this, however: We know that the previous set had clang and the next one doesn't exist, so we'd choose libcxxClang any day of the week.
-rw-r--r-- | pkgs/development/compilers/llvm/10/default.nix | 6 | ||||
-rw-r--r-- | pkgs/development/compilers/llvm/11/default.nix | 6 | ||||
-rw-r--r-- | pkgs/development/compilers/llvm/12/default.nix | 6 | ||||
-rw-r--r-- | pkgs/development/compilers/llvm/13/default.nix | 6 | ||||
-rw-r--r-- | pkgs/development/compilers/llvm/5/default.nix | 6 | ||||
-rw-r--r-- | pkgs/development/compilers/llvm/6/default.nix | 6 | ||||
-rw-r--r-- | pkgs/development/compilers/llvm/7/default.nix | 6 | ||||
-rw-r--r-- | pkgs/development/compilers/llvm/8/default.nix | 6 | ||||
-rw-r--r-- | pkgs/development/compilers/llvm/9/default.nix | 6 | ||||
-rw-r--r-- | pkgs/development/compilers/llvm/git/default.nix | 6 | ||||
-rw-r--r-- | pkgs/stdenv/booter.nix | 8 | ||||
-rw-r--r-- | pkgs/stdenv/cross/default.nix | 2 |
12 files changed, 58 insertions, 12 deletions
diff --git a/pkgs/development/compilers/llvm/10/default.nix b/pkgs/development/compilers/llvm/10/default.nix index 8bd7e937e7d..83840b4fd27 100644 --- a/pkgs/development/compilers/llvm/10/default.nix +++ b/pkgs/development/compilers/llvm/10/default.nix @@ -89,7 +89,11 @@ let # python3 = pkgs.python3; # don't use python-boot # }); - clang = if stdenv.cc.isGNU then tools.libstdcxxClang else tools.libcxxClang; + # pick clang appropriate for package set we are targeting + clang = + if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU + then tools.libstdcxxClang + else tools.libcxxClang; libstdcxxClang = wrapCCWith rec { cc = tools.clang-unwrapped; diff --git a/pkgs/development/compilers/llvm/11/default.nix b/pkgs/development/compilers/llvm/11/default.nix index ebd0dc672aa..b5c07091524 100644 --- a/pkgs/development/compilers/llvm/11/default.nix +++ b/pkgs/development/compilers/llvm/11/default.nix @@ -104,7 +104,11 @@ let # python3 = pkgs.python3; # don't use python-boot # }); - clang = if stdenv.cc.isGNU then tools.libstdcxxClang else tools.libcxxClang; + # pick clang appropriate for package set we are targeting + clang = + if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU + then tools.libstdcxxClang + else tools.libcxxClang; libstdcxxClang = wrapCCWith rec { cc = tools.clang-unwrapped; diff --git a/pkgs/development/compilers/llvm/12/default.nix b/pkgs/development/compilers/llvm/12/default.nix index e68522faea0..8de6bb420d4 100644 --- a/pkgs/development/compilers/llvm/12/default.nix +++ b/pkgs/development/compilers/llvm/12/default.nix @@ -92,7 +92,11 @@ let # python3 = pkgs.python3; # don't use python-boot # }); - clang = if stdenv.cc.isGNU then tools.libstdcxxClang else tools.libcxxClang; + # pick clang appropriate for package set we are targeting + clang = + if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU + then tools.libstdcxxClang + else tools.libcxxClang; libstdcxxClang = wrapCCWith rec { cc = tools.clang-unwrapped; diff --git a/pkgs/development/compilers/llvm/13/default.nix b/pkgs/development/compilers/llvm/13/default.nix index a89c6dabe39..bdc07a68742 100644 --- a/pkgs/development/compilers/llvm/13/default.nix +++ b/pkgs/development/compilers/llvm/13/default.nix @@ -93,7 +93,11 @@ let # python3 = pkgs.python3; # don't use python-boot # }); - clang = if stdenv.cc.isGNU then tools.libstdcxxClang else tools.libcxxClang; + # pick clang appropriate for package set we are targeting + clang = + if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU + then tools.libstdcxxClang + else tools.libcxxClang; libstdcxxClang = wrapCCWith rec { cc = tools.clang-unwrapped; diff --git a/pkgs/development/compilers/llvm/5/default.nix b/pkgs/development/compilers/llvm/5/default.nix index 4593580b72f..4a6d55d5572 100644 --- a/pkgs/development/compilers/llvm/5/default.nix +++ b/pkgs/development/compilers/llvm/5/default.nix @@ -65,7 +65,11 @@ let python3 = pkgs.python3; # don't use python-boot }); - clang = if stdenv.cc.isGNU then tools.libstdcxxClang else tools.libcxxClang; + # pick clang appropriate for package set we are targeting + clang = + if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU + then tools.libstdcxxClang + else tools.libcxxClang; libstdcxxClang = wrapCCWith rec { cc = tools.clang-unwrapped; diff --git a/pkgs/development/compilers/llvm/6/default.nix b/pkgs/development/compilers/llvm/6/default.nix index 9b1caf410bc..1b9a793e885 100644 --- a/pkgs/development/compilers/llvm/6/default.nix +++ b/pkgs/development/compilers/llvm/6/default.nix @@ -66,7 +66,11 @@ let python3 = pkgs.python3; # don't use python-boot }); - clang = if stdenv.cc.isGNU then tools.libstdcxxClang else tools.libcxxClang; + # pick clang appropriate for package set we are targeting + clang = + if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU + then tools.libstdcxxClang + else tools.libcxxClang; libstdcxxClang = wrapCCWith rec { cc = tools.clang-unwrapped; diff --git a/pkgs/development/compilers/llvm/7/default.nix b/pkgs/development/compilers/llvm/7/default.nix index d014c043a80..841fc120d74 100644 --- a/pkgs/development/compilers/llvm/7/default.nix +++ b/pkgs/development/compilers/llvm/7/default.nix @@ -96,7 +96,11 @@ let python3 = pkgs.python3; # don't use python-boot }); - clang = if stdenv.cc.isGNU then tools.libstdcxxClang else tools.libcxxClang; + # pick clang appropriate for package set we are targeting + clang = + if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU + then tools.libstdcxxClang + else tools.libcxxClang; libstdcxxClang = wrapCCWith rec { cc = tools.clang-unwrapped; diff --git a/pkgs/development/compilers/llvm/8/default.nix b/pkgs/development/compilers/llvm/8/default.nix index 7252b75a339..234473c1ada 100644 --- a/pkgs/development/compilers/llvm/8/default.nix +++ b/pkgs/development/compilers/llvm/8/default.nix @@ -97,7 +97,11 @@ let python3 = pkgs.python3; # don't use python-boot }); - clang = if stdenv.cc.isGNU then tools.libstdcxxClang else tools.libcxxClang; + # pick clang appropriate for package set we are targeting + clang = + if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU + then tools.libstdcxxClang + else tools.libcxxClang; libstdcxxClang = wrapCCWith rec { cc = tools.clang-unwrapped; diff --git a/pkgs/development/compilers/llvm/9/default.nix b/pkgs/development/compilers/llvm/9/default.nix index 9126a614b10..a10bac13824 100644 --- a/pkgs/development/compilers/llvm/9/default.nix +++ b/pkgs/development/compilers/llvm/9/default.nix @@ -97,7 +97,11 @@ let python3 = pkgs.python3; # don't use python-boot }); - clang = if stdenv.cc.isGNU then tools.libstdcxxClang else tools.libcxxClang; + # pick clang appropriate for package set we are targeting + clang = + if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU + then tools.libstdcxxClang + else tools.libcxxClang; libstdcxxClang = wrapCCWith rec { cc = tools.clang-unwrapped; diff --git a/pkgs/development/compilers/llvm/git/default.nix b/pkgs/development/compilers/llvm/git/default.nix index 666e9be3cd8..56904addb52 100644 --- a/pkgs/development/compilers/llvm/git/default.nix +++ b/pkgs/development/compilers/llvm/git/default.nix @@ -93,7 +93,11 @@ let # python3 = pkgs.python3; # don't use python-boot # }); - clang = if stdenv.cc.isGNU then tools.libstdcxxClang else tools.libcxxClang; + # pick clang appropriate for package set we are targeting + clang = + if (pkgs.targetPackages.stdenv or stdenv).cc.isGNU + then tools.libstdcxxClang + else tools.libcxxClang; libstdcxxClang = wrapCCWith rec { cc = tools.clang-unwrapped; diff --git a/pkgs/stdenv/booter.nix b/pkgs/stdenv/booter.nix index 51d617354e8..f1d07e6461a 100644 --- a/pkgs/stdenv/booter.nix +++ b/pkgs/stdenv/booter.nix @@ -124,7 +124,13 @@ stageFuns: let if buildPackages.stdenv.hasCC then if buildPackages.stdenv.cc.isClang or false - then buildPackages.clang + # buildPackages.clang checks targetPackages.stdenv.cc (i. e. this + # attribute) to get a sense of the its set's default compiler and + # chooses between libc++ and libstdc++ based on that. If we hit this + # code here, we'll cause an infinite recursion. Since a set with + # clang as its default compiler always means libc++, we can infer this + # decision statically. + then buildPackages.llvmPackages.libcxxClang else buildPackages.gcc else # This will blow up if anything uses it, but that's OK. The `if diff --git a/pkgs/stdenv/cross/default.nix b/pkgs/stdenv/cross/default.nix index 613b8d5304c..e01ac74599a 100644 --- a/pkgs/stdenv/cross/default.nix +++ b/pkgs/stdenv/cross/default.nix @@ -70,7 +70,7 @@ in lib.init bootStages ++ [ # when there is a C compiler and everything should be fine. then throw "no C compiler provided for this platform" else if crossSystem.isDarwin - then buildPackages.llvmPackages.clang + then buildPackages.llvmPackages.libcxxClang else if crossSystem.useLLVM or false then buildPackages.llvmPackages.clangUseLLVM else buildPackages.gcc; |