From af10a338feb5c039ef2ae4a606697b7b5e769c1e Mon Sep 17 00:00:00 2001
From: Alyssa Ross <hi@alyssa.is>
Date: Thu, 15 Aug 2024 10:11:35 +0200
Subject: [PATCH] gst_all_1.gstreamer: disable libunwind if unavailable

---
 .../libraries/gstreamer/core/default.nix            | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/pkgs/development/libraries/gstreamer/core/default.nix b/pkgs/development/libraries/gstreamer/core/default.nix
index 40d40d742463..2cf0569b3e9e 100644
--- a/pkgs/development/libraries/gstreamer/core/default.nix
+++ b/pkgs/development/libraries/gstreamer/core/default.nix
@@ -10,7 +10,6 @@
 , glib
 , makeWrapper
 , libcap
-, libunwind
 , elfutils # for libdw
 , bash-completion
 , lib
@@ -19,6 +18,9 @@
 , gobject-introspection
 , rustc
 , testers
+, libunwind
+# darwin.libunwind doesn't have pkg-config definitions so meson doesn't detect it.
+, withLibunwind ? !stdenv.isDarwin && lib.meta.availableOn stdenv.hostPlatform libunwind
 # Checks meson.is_cross_build(), so even canExecute isn't enough.
 , enableDocumentation ? stdenv.hostPlatform == stdenv.buildPlatform, hotdoc
 }:
@@ -70,9 +72,10 @@ stdenv.mkDerivation (finalAttrs: {
     bash-completion
   ] ++ lib.optionals stdenv.isLinux [
     libcap
-    libunwind
   ] ++ lib.optionals (lib.meta.availableOn stdenv.hostPlatform elfutils) [
     elfutils
+  ] ++ lib.optionals withLibunwind [
+    libunwind
   ] ++ lib.optionals stdenv.isDarwin [
     Cocoa
     CoreServices
@@ -86,10 +89,8 @@ stdenv.mkDerivation (finalAttrs: {
     "-Ddbghelp=disabled" # not needed as we already provide libunwind and libdw, and dbghelp is a fallback to those
     "-Dexamples=disabled" # requires many dependencies and probably not useful for our users
     (lib.mesonEnable "doc" enableDocumentation)
-  ] ++ lib.optionals stdenv.isDarwin [
-    # darwin.libunwind doesn't have pkg-config definitions so meson doesn't detect it.
-    "-Dlibunwind=disabled"
-    "-Dlibdw=disabled"
+    (lib.mesonEnable "libunwind" withLibunwind)
+    (lib.mesonEnable "libdw" withLibunwind)
   ];
 
   postPatch = ''