nongnu-libunwind: Disable package for RISC-V

The author has stated that he does not have time to implement support.
There is no use for the `supportsHost` passthru attribute anymore, so
let's remove that as well.

2 files changed, 4 insertions, 7 deletions

diff --git a/pkgs/development/libraries/libunwind/default.nix b/pkgs/development/libraries/libunwind/default.nix
index b2b5db2309c..bda7f72a557 100644
--- a/pkgs/development/libraries/libunwind/default.nix
+++ b/pkgs/development/libraries/libunwind/default.nix
@@ -38,8 +38,7 @@ stdenv.mkDerivation rec {
     description = "A portable and efficient API to determine the call-chain of a program";
     maintainers = with maintainers; [ orivej ];
     platforms = platforms.linux;
+    badPlatforms = [ "riscv32-linux" "riscv64-linux" ];
     license = licenses.mit;
   };
-
-  passthru.supportsHost = !stdenv.hostPlatform.isRiscV;
 }
diff --git a/pkgs/development/tools/misc/strace/default.nix b/pkgs/development/tools/misc/strace/default.nix
index 756f1b947ed..4da1a2cba09 100644
--- a/pkgs/development/tools/misc/strace/default.nix
+++ b/pkgs/development/tools/misc/strace/default.nix
@@ -1,9 +1,5 @@
 { lib, stdenv, fetchurl, perl, libunwind, buildPackages }:
 
-# libunwind does not have the supportsHost attribute on darwin, thus
-# when this package is evaluated it causes an evaluation error
-assert stdenv.isLinux;
-
 stdenv.mkDerivation rec {
   pname = "strace";
   version = "5.12";
@@ -16,7 +12,9 @@ stdenv.mkDerivation rec {
   depsBuildBuild = [ buildPackages.stdenv.cc ];
   nativeBuildInputs = [ perl ];
 
-  buildInputs = [ perl.out ] ++ lib.optional libunwind.supportsHost libunwind; # support -k
+  # On RISC-V platforms, LLVM's libunwind implementation is unsupported by strace.
+  # The build will silently fall back and -k will not work on RISC-V.
+  buildInputs = [ perl.out libunwind ]; # support -k
 
   postPatch = "patchShebangs --host strace-graph";