Merge pull request #255488 from natto1784/libcxxabi

pkgs/build-support/cc-wrapper/default.nix

@@ -469,6 +469,7 @@ stdenv.mkDerivation {
     ''
     + optionalString (libcxx.isLLVM or false) ''
       echo "-isystem ${lib.getDev libcxx}/include/c++/v1" >> $out/nix-support/libcxx-cxxflags
+      echo "-isystem ${lib.getDev libcxx.cxxabi}/include/c++/v1" >> $out/nix-support/libcxx-cxxflags
       echo "-stdlib=libc++" >> $out/nix-support/libcxx-ldflags
       echo "-l${libcxx.cxxabi.libName}" >> $out/nix-support/libcxx-ldflags
     ''

pkgs/development/compilers/llvm/16/default.nix

@@ -255,14 +255,6 @@ in let
         [ "-rtlib=compiler-rt"
           "-Wno-unused-command-line-argument"
           "-B${targetLlvmLibraries.compiler-rt}/lib"
-
-          # Combat "__cxxabi_config.h not found". Maybe this could be fixed by
-          # copying these headers into libcxx? Note that building libcxx
-          # outside of monorepo isn't supported anymore, might be related to
-          # https://github.com/llvm/llvm-project/issues/55632
-          # ("16.0.3 libcxx, libcxxabi: circular build dependencies")
-          # Looks like the machinery changed in https://reviews.llvm.org/D120727.
-          "-I${lib.getDev targetLlvmLibraries.libcxx.cxxabi}/include/c++/v1"
         ]
         ++ lib.optional (!stdenv.targetPlatform.isWasm) "--unwindlib=libunwind"
         ++ lib.optional

pkgs/test/cc-wrapper/default.nix

@@ -30,6 +30,13 @@ in stdenv.mkDerivation {
     $CXX -o cxx-check ${./cxx-main.cc}
     ${emulator} ./cxx-check
 
+    # test for https://github.com/NixOS/nixpkgs/issues/214524#issuecomment-1431745905
+    # .../include/cxxabi.h:20:10: fatal error: '__cxxabi_config.h' file not found
+    # in libcxxStdenv
+    echo "checking whether cxxabi.h can be included... " >&2
+    $CXX -o include-cxxabi ${./include-cxxabi.cc}
+    ${emulator} ./include-cxxabi
+
     ${lib.optionalString (stdenv.isDarwin && stdenv.cc.isClang) ''
       echo "checking whether compiler can build with CoreFoundation.framework... " >&2
       mkdir -p foo/lib

pkgs/test/cc-wrapper/include-cxxabi.cc

@@ -0,0 +1,8 @@
+#include <cxxabi.h>
+#include <iostream>
+
+int main(int argc, char **argv)
+{
+  std::cerr << "ok" << std::endl;
+  return 0;
+}