llvmPackages_15: apply some patches from llvmPackages_14

See #194634 for details.

PRs:
  - #191372
  - #190936
  - #82131
  - #199844
  - #197674
  - #184408
  - #193004

pkgs/development/compilers/llvm/15/clang/default.nix

@@ -84,6 +84,7 @@ let
       fi
       mv $out/share/clang/*.py $python/share/clang
       rm $out/bin/c-index-test
+      patchShebangs $python/bin
 
       mkdir -p $dev/bin
       cp bin/clang-tblgen $dev/bin
@@ -108,6 +109,7 @@ let
         of tools that can be built using the Clang frontend as a library to
         parse C/C++ code.
       '';
+      mainProgram = "clang";
     };
   } // lib.optionalAttrs enableManpages {
     pname = "clang-manpages";

pkgs/development/compilers/llvm/15/compiler-rt/default.nix

@@ -1,6 +1,7 @@
 { lib, stdenv, llvm_meta, version
 , monorepoSrc, runCommand
 , cmake, python3, libllvm, libcxxabi, libxcrypt
+, doFakeLibgcc ? stdenv.hostPlatform.isFreeBSD
 }:
 
 let
@@ -46,6 +47,8 @@ stdenv.mkDerivation {
     "-DCOMPILER_RT_BUILD_PROFILE=OFF"
     "-DCOMPILER_RT_BUILD_MEMPROF=OFF"
     "-DCOMPILER_RT_BUILD_ORC=OFF" # may be possible to build with musl if necessary
+  ] ++ lib.optionals (useLLVM || bareMetal) [
+     "-DCOMPILER_RT_BUILD_PROFILE=OFF"
   ] ++ lib.optionals ((useLLVM && !haveLibc) || bareMetal) [
     "-DCMAKE_C_COMPILER_WORKS=ON"
     "-DCMAKE_CXX_COMPILER_WORKS=ON"
@@ -107,6 +110,8 @@ stdenv.mkDerivation {
     ln -s $out/lib/*/clang_rt.crtend-*.o $out/lib/crtend.o
     ln -s $out/lib/*/clang_rt.crtbegin_shared-*.o $out/lib/crtbeginS.o
     ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/crtendS.o
+  '' + lib.optionalString doFakeLibgcc ''
+     ln -s $out/lib/freebsd/libclang_rt.builtins-*.a $out/lib/libgcc.a
   '';
 
   meta = llvm_meta // {

pkgs/development/compilers/llvm/15/default.nix

@@ -3,6 +3,7 @@
 , libxml2, python3, isl, fetchFromGitHub, overrideCC, wrapCCWith, wrapBintoolsWith
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
+, targetLlvm
 # This is the default binutils, but with *this* version of LLD rather
 # than the default LLVM verion's, if LLD is the choice. We use these for
 # the `useLLVM` bootstrapping below.
@@ -166,7 +167,7 @@ let
         ]
         ++ lib.optional (!stdenv.targetPlatform.isWasm) "--unwindlib=libunwind"
         ++ lib.optional
-          (!stdenv.targetPlatform.isWasm && stdenv.targetPlatform.useLLVM or false)
+          (!stdenv.targetPlatform.isWasm && !stdenv.targetPlatform.isFreeBSD && stdenv.targetPlatform.useLLVM or false)
           "-lunwind"
         ++ lib.optional stdenv.targetPlatform.isWasm "-fno-exceptions";
     };
@@ -273,7 +274,7 @@ let
     };
 
     openmp = callPackage ./openmp {
-      inherit llvm_meta;
+      inherit llvm_meta targetLlvm;
     };
   });
 

pkgs/development/compilers/llvm/15/libcxxabi/default.nix

@@ -53,7 +53,7 @@ stdenv.mkDerivation rec {
   '';
 
   nativeBuildInputs = [ cmake python3 ];
-  buildInputs = lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD && !stdenv.hostPlatform.isWasm) libunwind;
+  buildInputs = lib.optional (!stdenv.isDarwin && !stdenv.hostPlatform.isWasm) libunwind;
 
   cmakeFlags = [
     "-DLLVM_ENABLE_RUNTIMES=libcxxabi"

pkgs/development/compilers/llvm/15/lld/default.nix

@@ -35,6 +35,7 @@ stdenv.mkDerivation rec {
   ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     "-DLLVM_TABLEGEN_EXE=${buildLlvmTools.llvm}/bin/llvm-tblgen"
   ];
+  LDFLAGS = lib.optionalString stdenv.hostPlatform.isMusl "-Wl,-z,stack-size=2097152";
 
   outputs = [ "out" "lib" "dev" ];
 

pkgs/development/compilers/llvm/15/llvm/default.nix

@@ -18,10 +18,10 @@
 , debugVersion ? false
 , enableManpages ? false
 , enableSharedLibraries ? !stdenv.hostPlatform.isStatic
-, enablePFM ? !(stdenv.isDarwin
-  || stdenv.isAarch64 # broken for Ampere eMAG 8180 (c2.large.arm on Packet) #56245
-  || stdenv.isAarch32 # broken for the armv7l builder
-)
+, enablePFM ? stdenv.isLinux /* PFM only supports Linux */
+  # broken for Ampere eMAG 8180 (c2.large.arm on Packet) #56245
+  # broken for the armv7l builder
+  && !stdenv.hostPlatform.isAarch
 , enablePolly ? false
 } @args:
 
@@ -141,6 +141,7 @@ in stdenv.mkDerivation (rec {
     # Disables building of shared libs, -fPIC is still injected by cc-wrapper
     "-DLLVM_ENABLE_PIC=OFF"
     "-DLLVM_BUILD_STATIC=ON"
+    "-DLLVM_LINK_LLVM_DYLIB=off"
     # libxml2 needs to be disabled because the LLVM build system ignores its .la
     # file and doesn't link zlib as well.
     # https://github.com/ClangBuiltLinux/tc-build/issues/150#issuecomment-845418812

pkgs/development/compilers/llvm/15/openmp/default.nix

@@ -5,6 +5,7 @@
 , runCommand
 , cmake
 , llvm
+, targetLlvm
 , lit
 , clang-unwrapped
 , perl
@@ -33,7 +34,9 @@ stdenv.mkDerivation rec {
   outputs = [ "out" "dev" ];
 
   nativeBuildInputs = [ cmake perl pkg-config lit ];
-  buildInputs = [ llvm ];
+  buildInputs = [
+    (if stdenv.buildPlatform == stdenv.hostPlatform then llvm else targetLlvm)
+  ];
 
   # Unsup:Pass:XFail:Fail
   # 26:267:16:8

pkgs/top-level/all-packages.nix

@@ -15140,8 +15140,7 @@ with pkgs;
     inherit (stdenvAdapters) overrideCC;
     buildLlvmTools = buildPackages.llvmPackages_15.tools;
     targetLlvmLibraries = targetPackages.llvmPackages_15.libraries or llvmPackages_15.libraries;
-  } // lib.optionalAttrs (stdenv.hostPlatform.isi686 && stdenv.hostPlatform == stdenv.buildPlatform && buildPackages.stdenv.cc.isGNU) {
-    stdenv = gcc7Stdenv;
+    targetLlvm = targetPackages.llvmPackages_15.llvm or llvmPackages_15.llvm;
   }));
 
   llvmPackages_latest = llvmPackages_14;