Merge pull request #303447 from ExpidusOS/feat/llvm-git-commonify-libunwind

llvmPackages_{12,13,14,15,16,17,18,git}: use common libunwind

17 files changed, 111 insertions, 431 deletions

diff --git a/pkgs/development/compilers/llvm/12/default.nix b/pkgs/development/compilers/llvm/12/default.nix
index d9b1b7bb83f50..d35d463f0bb65 100644
--- a/pkgs/development/compilers/llvm/12/default.nix
+++ b/pkgs/development/compilers/llvm/12/default.nix
@@ -259,9 +259,12 @@ let
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
 
-    libunwind = callPackage ./libunwind {
+    libunwind = callPackage ../common/libunwind {
+      src = fetch "libunwind" "192ww6n81lj2mb9pj4043z79jp3cf58a9c2qrxjwm5c3a64n1shb";
+      patches = [
+        ./libunwind/gnu-install-dirs.patch
+      ];
       inherit llvm_meta;
-      inherit (buildLlvmTools) llvm;
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
 
diff --git a/pkgs/development/compilers/llvm/12/libunwind/default.nix b/pkgs/development/compilers/llvm/12/libunwind/default.nix
deleted file mode 100644
index 95e0962b46891..0000000000000
--- a/pkgs/development/compilers/llvm/12/libunwind/default.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{ lib, stdenv, llvm_meta, version, fetch, libcxx, llvm, cmake
-, enableShared ? !stdenv.hostPlatform.isStatic
-}:
-
-stdenv.mkDerivation rec {
-  pname = "libunwind";
-  inherit version;
-
-  src = fetch pname "192ww6n81lj2mb9pj4043z79jp3cf58a9c2qrxjwm5c3a64n1shb";
-
-  postUnpack = ''
-    ln -s ${libcxx.src}/libcxx .
-    ln -s ${libcxx.src}/llvm .
-  '';
-
-  patches = [
-    ./gnu-install-dirs.patch
-  ];
-
-  outputs = [ "out" "dev" ];
-
-  nativeBuildInputs = [ cmake ];
-
-  cmakeFlags = lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
-
-  meta = llvm_meta // {
-    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
-    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
-    description = "LLVM's unwinder library";
-    longDescription = ''
-      The unwind library provides a family of _Unwind_* functions implementing
-      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
-      I). It is a dependency of the C++ ABI library, and sometimes is a
-      dependency of other runtimes.
-    '';
-  };
-}
diff --git a/pkgs/development/compilers/llvm/13/default.nix b/pkgs/development/compilers/llvm/13/default.nix
index 48bd8fc3c3f19..2f314e67bf906 100644
--- a/pkgs/development/compilers/llvm/13/default.nix
+++ b/pkgs/development/compilers/llvm/13/default.nix
@@ -297,7 +297,10 @@ in let
       monorepoSrc = src;
     };
 
-    libunwind = callPackage ./libunwind {
+    libunwind = callPackage ../common/libunwind {
+      patches = [
+        ./libunwind/gnu-install-dirs.patch
+      ];
       inherit llvm_meta;
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
diff --git a/pkgs/development/compilers/llvm/13/libunwind/default.nix b/pkgs/development/compilers/llvm/13/libunwind/default.nix
deleted file mode 100644
index d837bc60de370..0000000000000
--- a/pkgs/development/compilers/llvm/13/libunwind/default.nix
+++ /dev/null
@@ -1,33 +0,0 @@
-{ lib, stdenv, llvm_meta, version, src, cmake
-, enableShared ? !stdenv.hostPlatform.isStatic
-}:
-
-stdenv.mkDerivation rec {
-  pname = "libunwind";
-  inherit version;
-
-  inherit src;
-  sourceRoot = "${src.name}/${pname}";
-
-  patches = [
-    ./gnu-install-dirs.patch
-  ];
-
-  outputs = [ "out" "dev" ];
-
-  nativeBuildInputs = [ cmake ];
-
-  cmakeFlags = lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
-
-  meta = llvm_meta // {
-    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
-    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
-    description = "LLVM's unwinder library";
-    longDescription = ''
-      The unwind library provides a family of _Unwind_* functions implementing
-      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
-      I). It is a dependency of the C++ ABI library, and sometimes is a
-      dependency of other runtimes.
-    '';
-  };
-}
diff --git a/pkgs/development/compilers/llvm/14/default.nix b/pkgs/development/compilers/llvm/14/default.nix
index be67dd588a194..158cd60c03d2e 100644
--- a/pkgs/development/compilers/llvm/14/default.nix
+++ b/pkgs/development/compilers/llvm/14/default.nix
@@ -294,7 +294,10 @@ in let
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
 
-    libunwind = callPackage ./libunwind {
+    libunwind = callPackage ../common/libunwind {
+      patches = [
+        ./libunwind/gnu-install-dirs.patch
+      ];
       inherit llvm_meta;
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
diff --git a/pkgs/development/compilers/llvm/14/libunwind/default.nix b/pkgs/development/compilers/llvm/14/libunwind/default.nix
deleted file mode 100644
index c6d9eda5e4749..0000000000000
--- a/pkgs/development/compilers/llvm/14/libunwind/default.nix
+++ /dev/null
@@ -1,47 +0,0 @@
-{ lib, stdenv, llvm_meta, version
-, monorepoSrc, runCommand
-, cmake
-, enableShared ? !stdenv.hostPlatform.isStatic
-}:
-
-stdenv.mkDerivation rec {
-  pname = "libunwind";
-  inherit version;
-
-  # I am not so comfortable giving libc++ and friends the whole monorepo as
-  # requested, so I filter it to what is needed.
-  src = runCommand "${pname}-src-${version}" {} ''
-    mkdir -p "$out"
-    cp -r ${monorepoSrc}/cmake "$out"
-    cp -r ${monorepoSrc}/${pname} "$out"
-    mkdir -p "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/cmake "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/utils "$out/libcxx"
-    mkdir -p "$out/llvm"
-    cp -r ${monorepoSrc}/llvm/cmake "$out/llvm"
-  '';
-
-  sourceRoot = "${src.name}/${pname}";
-
-  patches = [
-    ./gnu-install-dirs.patch
-  ];
-
-  outputs = [ "out" "dev" ];
-
-  nativeBuildInputs = [ cmake ];
-
-  cmakeFlags = lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
-
-  meta = llvm_meta // {
-    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
-    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
-    description = "LLVM's unwinder library";
-    longDescription = ''
-      The unwind library provides a family of _Unwind_* functions implementing
-      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
-      I). It is a dependency of the C++ ABI library, and sometimes is a
-      dependency of other runtimes.
-    '';
-  };
-}
diff --git a/pkgs/development/compilers/llvm/15/default.nix b/pkgs/development/compilers/llvm/15/default.nix
index 07b18c97c75c3..3c4d656a8f322 100644
--- a/pkgs/development/compilers/llvm/15/default.nix
+++ b/pkgs/development/compilers/llvm/15/default.nix
@@ -312,7 +312,10 @@ in let
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
 
-    libunwind = callPackage ./libunwind {
+    libunwind = callPackage ../common/libunwind {
+      patches = [
+        ./libunwind/gnu-install-dirs.patch
+      ];
       inherit llvm_meta;
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
diff --git a/pkgs/development/compilers/llvm/15/libunwind/default.nix b/pkgs/development/compilers/llvm/15/libunwind/default.nix
deleted file mode 100644
index 1b677a7a2c0d7..0000000000000
--- a/pkgs/development/compilers/llvm/15/libunwind/default.nix
+++ /dev/null
@@ -1,67 +0,0 @@
-{ lib, stdenv, llvm_meta, version
-, monorepoSrc, runCommand
-, cmake
-, ninja
-, python3
-, enableShared ? !stdenv.hostPlatform.isStatic
-}:
-
-stdenv.mkDerivation rec {
-  pname = "libunwind";
-  inherit version;
-
-  # I am not so comfortable giving libc++ and friends the whole monorepo as
-  # requested, so I filter it to what is needed.
-  src = runCommand "${pname}-src-${version}" {} ''
-    mkdir -p "$out"
-    cp -r ${monorepoSrc}/cmake "$out"
-    cp -r ${monorepoSrc}/${pname} "$out"
-    mkdir -p "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/cmake "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/utils "$out/libcxx"
-    mkdir -p "$out/llvm"
-    cp -r ${monorepoSrc}/llvm/cmake "$out/llvm"
-    cp -r ${monorepoSrc}/llvm/utils "$out/llvm"
-    cp -r ${monorepoSrc}/runtimes "$out"
-  '';
-
-  sourceRoot = "${src.name}/runtimes";
-
-  prePatch = ''
-    cd ../${pname}
-    chmod -R u+w .
-  '';
-
-  patches = [
-    ./gnu-install-dirs.patch
-  ];
-
-  postPatch = ''
-    cd ../runtimes
-  '';
-
-  postInstall = lib.optionalString (enableShared && !stdenv.hostPlatform.isDarwin) ''
-    # libcxxabi wants to link to libunwind_shared.so (?).
-    ln -s $out/lib/libunwind.so $out/lib/libunwind_shared.so
-  '';
-
-  outputs = [ "out" "dev" ];
-
-  nativeBuildInputs = [ cmake ninja python3 ];
-
-  cmakeFlags = [
-    "-DLLVM_ENABLE_RUNTIMES=libunwind"
-  ] ++ lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
-
-  meta = llvm_meta // {
-    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
-    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
-    description = "LLVM's unwinder library";
-    longDescription = ''
-      The unwind library provides a family of _Unwind_* functions implementing
-      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
-      I). It is a dependency of the C++ ABI library, and sometimes is a
-      dependency of other runtimes.
-    '';
-  };
-}
diff --git a/pkgs/development/compilers/llvm/16/default.nix b/pkgs/development/compilers/llvm/16/default.nix
index 0d5d7365ea061..2028b48bd0803 100644
--- a/pkgs/development/compilers/llvm/16/default.nix
+++ b/pkgs/development/compilers/llvm/16/default.nix
@@ -327,7 +327,10 @@ in let
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
 
-    libunwind = callPackage ./libunwind {
+    libunwind = callPackage ../common/libunwind {
+      patches = [
+        ./libunwind/gnu-install-dirs.patch
+      ];
       inherit llvm_meta;
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
diff --git a/pkgs/development/compilers/llvm/16/libunwind/default.nix b/pkgs/development/compilers/llvm/16/libunwind/default.nix
deleted file mode 100644
index 1b677a7a2c0d7..0000000000000
--- a/pkgs/development/compilers/llvm/16/libunwind/default.nix
+++ /dev/null
@@ -1,67 +0,0 @@
-{ lib, stdenv, llvm_meta, version
-, monorepoSrc, runCommand
-, cmake
-, ninja
-, python3
-, enableShared ? !stdenv.hostPlatform.isStatic
-}:
-
-stdenv.mkDerivation rec {
-  pname = "libunwind";
-  inherit version;
-
-  # I am not so comfortable giving libc++ and friends the whole monorepo as
-  # requested, so I filter it to what is needed.
-  src = runCommand "${pname}-src-${version}" {} ''
-    mkdir -p "$out"
-    cp -r ${monorepoSrc}/cmake "$out"
-    cp -r ${monorepoSrc}/${pname} "$out"
-    mkdir -p "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/cmake "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/utils "$out/libcxx"
-    mkdir -p "$out/llvm"
-    cp -r ${monorepoSrc}/llvm/cmake "$out/llvm"
-    cp -r ${monorepoSrc}/llvm/utils "$out/llvm"
-    cp -r ${monorepoSrc}/runtimes "$out"
-  '';
-
-  sourceRoot = "${src.name}/runtimes";
-
-  prePatch = ''
-    cd ../${pname}
-    chmod -R u+w .
-  '';
-
-  patches = [
-    ./gnu-install-dirs.patch
-  ];
-
-  postPatch = ''
-    cd ../runtimes
-  '';
-
-  postInstall = lib.optionalString (enableShared && !stdenv.hostPlatform.isDarwin) ''
-    # libcxxabi wants to link to libunwind_shared.so (?).
-    ln -s $out/lib/libunwind.so $out/lib/libunwind_shared.so
-  '';
-
-  outputs = [ "out" "dev" ];
-
-  nativeBuildInputs = [ cmake ninja python3 ];
-
-  cmakeFlags = [
-    "-DLLVM_ENABLE_RUNTIMES=libunwind"
-  ] ++ lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
-
-  meta = llvm_meta // {
-    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
-    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
-    description = "LLVM's unwinder library";
-    longDescription = ''
-      The unwind library provides a family of _Unwind_* functions implementing
-      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
-      I). It is a dependency of the C++ ABI library, and sometimes is a
-      dependency of other runtimes.
-    '';
-  };
-}
diff --git a/pkgs/development/compilers/llvm/17/default.nix b/pkgs/development/compilers/llvm/17/default.nix
index f004a1a0bc741..42888dcc951af 100644
--- a/pkgs/development/compilers/llvm/17/default.nix
+++ b/pkgs/development/compilers/llvm/17/default.nix
@@ -312,7 +312,7 @@ in let
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
 
-    libunwind = callPackage ./libunwind {
+    libunwind = callPackage ../common/libunwind {
       inherit llvm_meta;
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
diff --git a/pkgs/development/compilers/llvm/17/libunwind/default.nix b/pkgs/development/compilers/llvm/17/libunwind/default.nix
deleted file mode 100644
index a3c8e2594f5a7..0000000000000
--- a/pkgs/development/compilers/llvm/17/libunwind/default.nix
+++ /dev/null
@@ -1,63 +0,0 @@
-{ lib, stdenv, llvm_meta, version
-, monorepoSrc, runCommand
-, cmake
-, ninja
-, python3
-, enableShared ? !stdenv.hostPlatform.isStatic
-}:
-
-stdenv.mkDerivation rec {
-  pname = "libunwind";
-  inherit version;
-
-  # I am not so comfortable giving libc++ and friends the whole monorepo as
-  # requested, so I filter it to what is needed.
-  src = runCommand "${pname}-src-${version}" {} ''
-    mkdir -p "$out"
-    cp -r ${monorepoSrc}/cmake "$out"
-    cp -r ${monorepoSrc}/${pname} "$out"
-    mkdir -p "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/cmake "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/utils "$out/libcxx"
-    mkdir -p "$out/llvm"
-    cp -r ${monorepoSrc}/llvm/cmake "$out/llvm"
-    cp -r ${monorepoSrc}/llvm/utils "$out/llvm"
-    cp -r ${monorepoSrc}/runtimes "$out"
-  '';
-
-  sourceRoot = "${src.name}/runtimes";
-
-  prePatch = ''
-    cd ../${pname}
-    chmod -R u+w .
-  '';
-
-  postPatch = ''
-    cd ../runtimes
-  '';
-
-  postInstall = lib.optionalString (enableShared && !stdenv.hostPlatform.isDarwin) ''
-    # libcxxabi wants to link to libunwind_shared.so (?).
-    ln -s $out/lib/libunwind.so $out/lib/libunwind_shared.so
-  '';
-
-  outputs = [ "out" "dev" ];
-
-  nativeBuildInputs = [ cmake ninja python3 ];
-
-  cmakeFlags = [
-    "-DLLVM_ENABLE_RUNTIMES=libunwind"
-  ] ++ lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
-
-  meta = llvm_meta // {
-    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
-    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
-    description = "LLVM's unwinder library";
-    longDescription = ''
-      The unwind library provides a family of _Unwind_* functions implementing
-      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
-      I). It is a dependency of the C++ ABI library, and sometimes is a
-      dependency of other runtimes.
-    '';
-  };
-}
diff --git a/pkgs/development/compilers/llvm/18/default.nix b/pkgs/development/compilers/llvm/18/default.nix
index 63667a513e4c4..f34d4f58a02a5 100644
--- a/pkgs/development/compilers/llvm/18/default.nix
+++ b/pkgs/development/compilers/llvm/18/default.nix
@@ -312,7 +312,7 @@ in let
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
 
-    libunwind = callPackage ./libunwind {
+    libunwind = callPackage ../common/libunwind {
       inherit llvm_meta;
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
diff --git a/pkgs/development/compilers/llvm/18/libunwind/default.nix b/pkgs/development/compilers/llvm/18/libunwind/default.nix
deleted file mode 100644
index e67823ffb85c2..0000000000000
--- a/pkgs/development/compilers/llvm/18/libunwind/default.nix
+++ /dev/null
@@ -1,54 +0,0 @@
-{ lib, stdenv, llvm_meta, version
-, monorepoSrc, runCommand
-, cmake
-, ninja
-, python3
-, enableShared ? !stdenv.hostPlatform.isStatic
-}:
-
-stdenv.mkDerivation rec {
-  pname = "libunwind";
-  inherit version;
-
-  # I am not so comfortable giving libc++ and friends the whole monorepo as
-  # requested, so I filter it to what is needed.
-  src = runCommand "${pname}-src-${version}" {} ''
-    mkdir -p "$out"
-    cp -r ${monorepoSrc}/cmake "$out"
-    cp -r ${monorepoSrc}/${pname} "$out"
-    mkdir -p "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/cmake "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/utils "$out/libcxx"
-    mkdir -p "$out/llvm"
-    cp -r ${monorepoSrc}/llvm/cmake "$out/llvm"
-    cp -r ${monorepoSrc}/llvm/utils "$out/llvm"
-    cp -r ${monorepoSrc}/runtimes "$out"
-  '';
-
-  sourceRoot = "${src.name}/runtimes";
-
-  postInstall = lib.optionalString (enableShared && !stdenv.hostPlatform.isDarwin) ''
-    # libcxxabi wants to link to libunwind_shared.so (?).
-    ln -s $out/lib/libunwind.so $out/lib/libunwind_shared.so
-  '';
-
-  outputs = [ "out" "dev" ];
-
-  nativeBuildInputs = [ cmake ninja python3 ];
-
-  cmakeFlags = [
-    "-DLLVM_ENABLE_RUNTIMES=libunwind"
-  ] ++ lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
-
-  meta = llvm_meta // {
-    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
-    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
-    description = "LLVM's unwinder library";
-    longDescription = ''
-      The unwind library provides a family of _Unwind_* functions implementing
-      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
-      I). It is a dependency of the C++ ABI library, and sometimes is a
-      dependency of other runtimes.
-    '';
-  };
-}
diff --git a/pkgs/development/compilers/llvm/common/libunwind/default.nix b/pkgs/development/compilers/llvm/common/libunwind/default.nix
new file mode 100644
index 0000000000000..515914e6acb64
--- /dev/null
+++ b/pkgs/development/compilers/llvm/common/libunwind/default.nix
@@ -0,0 +1,87 @@
+{ lib
+, stdenv
+, release_version
+, patches ? []
+, src ? null
+, llvm_meta
+, version
+, monorepoSrc ? null
+, runCommand
+, cmake
+, ninja
+, python3
+, libcxx
+, enableShared ? !stdenv.hostPlatform.isStatic
+}:
+let
+  pname = "libunwind";
+  src' = if monorepoSrc != null then
+    runCommand "${pname}-src-${version}" {} (''
+      mkdir -p "$out"
+      cp -r ${monorepoSrc}/cmake "$out"
+      cp -r ${monorepoSrc}/${pname} "$out"
+      mkdir -p "$out/libcxx"
+      cp -r ${monorepoSrc}/libcxx/cmake "$out/libcxx"
+      cp -r ${monorepoSrc}/libcxx/utils "$out/libcxx"
+      mkdir -p "$out/llvm"
+      cp -r ${monorepoSrc}/llvm/cmake "$out/llvm"
+    '' + lib.optionalString (lib.versionAtLeast release_version "15") ''
+      cp -r ${monorepoSrc}/llvm/utils "$out/llvm"
+      cp -r ${monorepoSrc}/runtimes "$out"
+    '') else src;
+
+  hasPatches = builtins.length patches > 0;
+
+  postUnpack = lib.optionalString (lib.versions.major release_version == "12") ''
+    ln -s ${libcxx.src}/libcxx .
+    ln -s ${libcxx.src}/llvm .
+  '';
+
+  prePatch = lib.optionalString (lib.versionAtLeast release_version "15" && (hasPatches || lib.versionOlder release_version "18")) ''
+    cd ../${pname}
+    chmod -R u+w .
+  '';
+
+  postPatch = lib.optionalString (lib.versionAtLeast release_version "15" && (hasPatches || lib.versionOlder release_version "18")) ''
+    cd ../runtimes
+  '';
+
+  postInstall = lib.optionalString (enableShared && !stdenv.hostPlatform.isDarwin) ''
+    # libcxxabi wants to link to libunwind_shared.so (?).
+    ln -s $out/lib/libunwind.so $out/lib/libunwind_shared.so
+  '';
+in
+stdenv.mkDerivation (rec {
+  inherit pname version patches;
+
+  src = src';
+
+  sourceRoot =
+    if lib.versionOlder release_version "13" then null
+    else if lib.versionAtLeast release_version "15" then "${src.name}/runtimes"
+    else "${src.name}/${pname}";
+
+  outputs = [ "out" "dev" ];
+
+  nativeBuildInputs = [ cmake ] ++ lib.optionals (lib.versionAtLeast release_version "15") [
+    ninja python3
+  ];
+
+  cmakeFlags = lib.optional (lib.versionAtLeast release_version "15") "-DLLVM_ENABLE_RUNTIMES=libunwind"
+    ++ lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
+
+  meta = llvm_meta // {
+    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
+    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
+    description = "LLVM's unwinder library";
+    longDescription = ''
+      The unwind library provides a family of _Unwind_* functions implementing
+      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
+      I). It is a dependency of the C++ ABI library, and sometimes is a
+      dependency of other runtimes.
+    '';
+  };
+} // (if postUnpack != "" then { inherit postUnpack; } else {})
+  // (if (lib.versionAtLeast release_version "15") then { inherit postInstall; } else {})
+  // (if prePatch != "" then { inherit prePatch; } else {})
+  // (if postPatch != "" then { inherit postPatch; } else {}))
diff --git a/pkgs/development/compilers/llvm/git/default.nix b/pkgs/development/compilers/llvm/git/default.nix
index 3122f2e73d70a..cbb380260dee9 100644
--- a/pkgs/development/compilers/llvm/git/default.nix
+++ b/pkgs/development/compilers/llvm/git/default.nix
@@ -317,7 +317,7 @@ in let
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
 
-    libunwind = callPackage ./libunwind {
+    libunwind = callPackage ../common/libunwind {
       inherit llvm_meta;
       stdenv = overrideCC stdenv buildLlvmTools.clangNoLibcxx;
     };
diff --git a/pkgs/development/compilers/llvm/git/libunwind/default.nix b/pkgs/development/compilers/llvm/git/libunwind/default.nix
deleted file mode 100644
index e67823ffb85c2..0000000000000
--- a/pkgs/development/compilers/llvm/git/libunwind/default.nix
+++ /dev/null
@@ -1,54 +0,0 @@
-{ lib, stdenv, llvm_meta, version
-, monorepoSrc, runCommand
-, cmake
-, ninja
-, python3
-, enableShared ? !stdenv.hostPlatform.isStatic
-}:
-
-stdenv.mkDerivation rec {
-  pname = "libunwind";
-  inherit version;
-
-  # I am not so comfortable giving libc++ and friends the whole monorepo as
-  # requested, so I filter it to what is needed.
-  src = runCommand "${pname}-src-${version}" {} ''
-    mkdir -p "$out"
-    cp -r ${monorepoSrc}/cmake "$out"
-    cp -r ${monorepoSrc}/${pname} "$out"
-    mkdir -p "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/cmake "$out/libcxx"
-    cp -r ${monorepoSrc}/libcxx/utils "$out/libcxx"
-    mkdir -p "$out/llvm"
-    cp -r ${monorepoSrc}/llvm/cmake "$out/llvm"
-    cp -r ${monorepoSrc}/llvm/utils "$out/llvm"
-    cp -r ${monorepoSrc}/runtimes "$out"
-  '';
-
-  sourceRoot = "${src.name}/runtimes";
-
-  postInstall = lib.optionalString (enableShared && !stdenv.hostPlatform.isDarwin) ''
-    # libcxxabi wants to link to libunwind_shared.so (?).
-    ln -s $out/lib/libunwind.so $out/lib/libunwind_shared.so
-  '';
-
-  outputs = [ "out" "dev" ];
-
-  nativeBuildInputs = [ cmake ninja python3 ];
-
-  cmakeFlags = [
-    "-DLLVM_ENABLE_RUNTIMES=libunwind"
-  ] ++ lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
-
-  meta = llvm_meta // {
-    # Details: https://github.com/llvm/llvm-project/blob/main/libunwind/docs/index.rst
-    homepage = "https://clang.llvm.org/docs/Toolchain.html#unwind-library";
-    description = "LLVM's unwinder library";
-    longDescription = ''
-      The unwind library provides a family of _Unwind_* functions implementing
-      the language-neutral stack unwinding portion of the Itanium C++ ABI (Level
-      I). It is a dependency of the C++ ABI library, and sometimes is a
-      dependency of other runtimes.
-    '';
-  };
-}