2 files changed, 40 insertions, 0 deletions
diff --git a/pkgs/development/compilers/llvm/12/libunwind/default.nix b/pkgs/development/compilers/llvm/12/libunwind/default.nix
index 8b75146d7b22..abfe950614ad 100644
--- a/pkgs/development/compilers/llvm/12/libunwind/default.nix
+++ b/pkgs/development/compilers/llvm/12/libunwind/default.nix
@@ -15,6 +15,12 @@ stdenv.mkDerivation rec {
     mv llvm-* llvm
   '';
 
+  patches = [
+    ./gnu-install-dirs.patch
+  ];
+
+  outputs = [ "out" "dev" ];
+
   nativeBuildInputs = [ cmake ];
 
   cmakeFlags = lib.optional (!enableShared) "-DLIBUNWIND_ENABLE_SHARED=OFF";
diff --git a/pkgs/development/compilers/llvm/12/libunwind/gnu-install-dirs.patch b/pkgs/development/compilers/llvm/12/libunwind/gnu-install-dirs.patch
new file mode 100644
index 000000000000..a791d6c43231
--- /dev/null
+++ b/pkgs/development/compilers/llvm/12/libunwind/gnu-install-dirs.patch
@@ -0,0 +1,34 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 48cb8e004e08..fec8144fb95a 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -23,6 +23,8 @@ set(LIBUNWIND_LIBCXX_PATH "${CMAKE_CURRENT_LIST_DIR}/../libcxx" CACHE PATH
+ if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR LIBUNWIND_STANDALONE_BUILD)
+   project(libunwind LANGUAGES C CXX ASM)
+ 
++  include(GNUInstallDirs)
++
+   set(PACKAGE_NAME libunwind)
+   set(PACKAGE_VERSION 12.0.0)
+   set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
+@@ -115,17 +117,17 @@ set(CMAKE_MODULE_PATH
+ 
+ if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
+   set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
+-  set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
++  set(LIBUNWIND_INSTALL_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR}${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE}/c++)
+   if(LIBCXX_LIBDIR_SUBDIR)
+     string(APPEND LIBUNWIND_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
+     string(APPEND LIBUNWIND_INSTALL_LIBRARY_DIR /${LIBUNWIND_LIBDIR_SUBDIR})
+   endif()
+ elseif(LLVM_LIBRARY_OUTPUT_INTDIR)
+   set(LIBUNWIND_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
+-  set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LIBUNWIND_LIBDIR_SUFFIX})
++  set(LIBUNWIND_INSTALL_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR}${LIBUNWIND_LIBDIR_SUFFIX})
+ else()
+   set(LIBUNWIND_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBUNWIND_LIBDIR_SUFFIX})
+-  set(LIBUNWIND_INSTALL_LIBRARY_DIR lib${LIBUNWIND_LIBDIR_SUFFIX})
++  set(LIBUNWIND_INSTALL_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR}${LIBUNWIND_LIBDIR_SUFFIX})
+ endif()
+ 
+ set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBUNWIND_LIBRARY_DIR})