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-rw-r--r--pkgs/development/compilers/llvm/13/compiler-rt/default.nix6
-rw-r--r--pkgs/development/compilers/llvm/13/default.nix2
-rw-r--r--pkgs/development/compilers/llvm/13/libcxxabi/default.nix2
3 files changed, 7 insertions, 3 deletions
diff --git a/pkgs/development/compilers/llvm/13/compiler-rt/default.nix b/pkgs/development/compilers/llvm/13/compiler-rt/default.nix
index 798280f0c1c49..52aa9ffe11f5c 100644
--- a/pkgs/development/compilers/llvm/13/compiler-rt/default.nix
+++ b/pkgs/development/compilers/llvm/13/compiler-rt/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, llvm_meta, version, src, cmake, python3, xcbuild, libllvm, libcxxabi, libxcrypt }:
+{ lib, stdenv, llvm_meta, version, src, cmake, python3, xcbuild, libllvm, libcxxabi, libxcrypt
+, doFakeLibgcc ? stdenv.hostPlatform.isFreeBSD
+}:
 
 let
 
@@ -99,6 +101,8 @@ 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 // {
diff --git a/pkgs/development/compilers/llvm/13/default.nix b/pkgs/development/compilers/llvm/13/default.nix
index 874be111ade07..fced8f7d2ae3e 100644
--- a/pkgs/development/compilers/llvm/13/default.nix
+++ b/pkgs/development/compilers/llvm/13/default.nix
@@ -163,7 +163,7 @@ let
         echo "-B${targetLlvmLibraries.compiler-rt}/lib" >> $out/nix-support/cc-cflags
       '' + lib.optionalString (!stdenv.targetPlatform.isWasm) ''
         echo "--unwindlib=libunwind" >> $out/nix-support/cc-cflags
-      '' + lib.optionalString (!stdenv.targetPlatform.isWasm && stdenv.targetPlatform.useLLVM or false) ''
+      '' + lib.optionalString (!stdenv.targetPlatform.isWasm && !stdenv.targetPlatform.isFreeBSD && stdenv.targetPlatform.useLLVM or false) ''
         echo "-lunwind" >> $out/nix-support/cc-ldflags
       '' + lib.optionalString stdenv.targetPlatform.isWasm ''
         echo "-fno-exceptions" >> $out/nix-support/cc-cflags
diff --git a/pkgs/development/compilers/llvm/13/libcxxabi/default.nix b/pkgs/development/compilers/llvm/13/libcxxabi/default.nix
index 5da86b96d5a72..9043c6bff25b8 100644
--- a/pkgs/development/compilers/llvm/13/libcxxabi/default.nix
+++ b/pkgs/development/compilers/llvm/13/libcxxabi/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, llvm_meta, cmake, python3, src, cxx-headers, libunwind, version
 , enableShared ? !stdenv.hostPlatform.isStatic
 , standalone ? stdenv.hostPlatform.useLLVM or false
-, withLibunwind ? !stdenv.isDarwin && !stdenv.isFreeBSD && !stdenv.hostPlatform.isWasm
+, withLibunwind ? !stdenv.isDarwin && !stdenv.hostPlatform.isWasm
 }:
 
 stdenv.mkDerivation rec {